阅读说明：本技术 一种抗菌阻燃材料及其应用方法 (Antibacterial flame-retardant material and application method thereof ) 是由 邹旭东 陶蓉 于 2020-12-30 设计创作，主要内容包括：发明涉及复合材料技术领域,涉及一种无机抗菌阻燃剂,特别涉及一种抗菌阻燃材料及其应用方法；其技术要点如下：按照重量份数计算,包括如下组分：阻燃剂10～20份,抗菌剂0.1～1份；所述抗菌剂是AgPt插层水滑石；阻燃剂包括如下组分：三氯氧磷5～10、三聚氰胺4～8份和二茂铁基聚合物3～5份。本发明的提供的一种抗菌阻燃剂及其应用方法,通过阻燃剂和抗菌剂的协同与PC的复配使用,提高阻燃效果和抗冲击性能。(The invention relates to the technical field of composite materials, relates to an inorganic antibacterial flame retardant, and particularly relates to an antibacterial flame retardant material and an application method thereof; the technical points are as follows: the composition comprises the following components in parts by weight: 10-20 parts of a flame retardant and 0.1-1 part of an antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 5-10 parts of phosphorus oxychloride, 4-8 parts of melamine and 3-5 parts of ferrocenyl polymer. According to the antibacterial flame retardant and the application method thereof provided by the invention, the flame retardant effect and the impact resistance are improved by the compound use of the synergy of the flame retardant and the antibacterial agent and the PC.)

1. The antibacterial flame-retardant material is characterized by comprising the following components in parts by weight: 10-20 parts of a flame retardant and 0.1-1 part of an antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 5-10 parts of phosphorus oxychloride, 4-8 parts of melamine and 3-5 parts of ferrocenyl polymer.

2. The antibacterial flame-retardant material of claim 1, wherein the AgPt intercalated hydrotalcite is Pt_xAg_y/MgAl-LDHs, wherein x =1 or 2; y =2, 3 or 4.

3. The antibacterial flame-retardant material according to claim 1, characterized in that the flame retardant further comprises 5-7 parts by weight of heteropoly acid modified kaolin.

4. The antibacterial flame-retardant material of claim 3, wherein the heteropoly acid modified kaolin is molybdovanadophosphoric modified kaolin.

5. The antibacterial flame-retardant material according to claim 2, which is characterized by comprising the following specific preparation methods: weighing a certain amount of K₂PtCl₄And dissolving silver lignosulfonate sol in deionized water respectively to ensure that n (Pt) = 1: 0.3-2, adding the solution into a beaker weighed with 0.50g of magnesium-aluminum hydrotalcite, continuously stirring for 5 hours in a constant-temperature water bath kettle at 80 ℃, filtering, washing for 3-5 times by using deionized water, and drying for 8 hours at 60 ℃ to obtain Pt_xAg_y/MgAl-LDH。

6. The application method of the antibacterial flame-retardant material according to claim 1, wherein the antibacterial flame-retardant material is used for preparing a PC/ABS alloy material, and the PC/ABS alloy material comprises the following components in parts by weight: 65-75 parts of PC, 5-15 parts of ABS, 15-20 parts of antibacterial flame-retardant material, 2-9 parts of toughening agent, 0.1-1 part of antioxidant and 0.1-1 part of anti-dripping agent.

7. The method for applying the antibacterial flame-retardant material according to claim 6, wherein the toughening agent is an acrylate core-shell impact modifier and silicone impact modifier composite.

8. The method for applying the antibacterial and flame-retardant material as claimed in claim 7, wherein the antioxidant is olive shell extract.

9. The method for applying the antibacterial flame-retardant material according to claim 1, wherein the antibacterial flame-retardant material is pre-blended with the PC.

10. The method for applying the antibacterial flame-retardant material according to claim 9, characterized in that the preparation method comprises the following operation steps:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

and S3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

Technical Field

The invention relates to the technical field of composite materials, relates to an inorganic antibacterial flame retardant, and particularly relates to an antibacterial flame retardant material and an application method thereof.

Background

In recent years, fire accidents frequently occur, people who are smoked to be dead are 4-5 times of the people who are burned when a fire breaks out, and for the purpose of preventing and controlling the fire, the fire-retardant and flame-retardant material in the fields of electronics, electric appliances, automobile materials, building materials and the like is required to reduce the combustion smoke release amount of the material, and the smoke release amount becomes an important control index. The flame-retardant PC/ABS is a halogen-free flame-retardant system, is environment-friendly and has relatively small smoke release amount, and the smoke release amount of the PC/ABS is further reduced by modifying and toughening the PC/ABS through synergistic flame retardance on the premise of ensuring the performance.

Along with the higher and higher requirements of people on the quality of products, the requirements of plastic products on antibacterial and mildewproof modification are increasing. The plastic itself is the breeding and transmission of organic pathogenic microorganisms on living goods. The introduction of antimicrobial agents into plastics effectively solves the above problems. The antibacterial plastic can keep the growth or reproduction of certain microorganisms such as bacteria, fungi, yeasts, algae, viruses and the like below a necessary level within a certain period of time.

In view of the defects of the existing PC/ABS alloy material, the inventor develops an antibacterial flame-retardant material and an application method thereof based on years of abundant experience and professional knowledge of the material and by matching theoretical analysis and research innovation, has excellent impact property and antibacterial effect, and can be applied to household appliances, buildings, internal and external ornaments of automobiles and the like.

Disclosure of Invention

The first purpose of the invention is to provide an antibacterial flame-retardant material, which can obviously improve the toughness of a PC/ABS material and reduce the smoke release amount, and can improve the flame-retardant effect and the impact resistance by the compound use of the flame retardant and the antibacterial agent and the PC.

The technical purpose of the invention is realized by the following technical scheme:

the invention provides an antibacterial flame-retardant material which comprises the following components in parts by weight: 10-20 parts of a flame retardant and 0.1-1 part of an antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 5-10 parts of phosphorus oxychloride, 4-8 parts of melamine and 3-5 parts of ferrocenyl polymer. In the AgPt intercalated hydrotalcite, Ag and Pt have a synergistic effect, so that the antibacterial capacity is effectively improved; the hydrotalcite has a certain moisture resistance, has extremely strong water absorption capacity when meeting water, and forms weak ionization in Ag and Pt after absorbing the water into the intercalation, thereby further improving the antibacterial effect; when high temperature is met, hydrotalcite expands under heat, and prevents combustion together with Ag and Pt.

Further, the preparation method of the antibacterial flame retardant comprises the steps of uniformly mixing the antibacterial agent and the flame retardant under the water bath condition of 60 ℃, and drying.

Further, the AgPt intercalated hydrotalcite is Pt_xAg_y(ii)/MgAl-LDHs, wherein x is 1 or 2; y is 2, 3 or 4.

The preparation method comprises the following steps: weighing a certain amount of K₂PtCl₄And silver lignosulfonate sol in deionized water to obtain sol with n (Pt) 1 to (0.3-2). Simultaneously adding the powder into a beaker weighed with 0.50g of magnesium-aluminum hydrotalcite, continuously stirring for 5 hours in a constant-temperature water bath kettle at the temperature of 80 ℃, filtering, washing for 3-5 times by using deionized water, and drying for 8 hours at the temperature of 60 ℃ to obtain Pt_xAg_yMgAl-LDH. The silver lignosulfonate sol is used as an Ag source, lignosulfonate can be introduced into the intercalation, the specific surface area of the intercalation is enlarged, the smoke suppression performance of the intercalation is improved, and on the other hand, lignosulfonate groups have a flame retardant effect and can further improve the flame retardant performance of the alloy material.

Further, the flame retardant comprises the following components in parts by weight: 5-10 parts of phosphorus oxychloride, 4-8 parts of melamine and 3-5 parts of ferrocenyl polymer.

Further, the flame retardant comprises the following components in parts by weight: 5-10 parts of phosphorus oxychloride, 4-8 parts of melamine and 3-5 parts of ferrocenyl polymer. After the phosphorus oxychloride and the melamine are subjected to cross-linking reaction, the expanded melamine ferric pyrophosphate can be obtained and coated in the ferrocenyl polymer to form the core-shell type flame retardant, the polymer of the shell layer has good compatibility with PC (polycarbonate), the cracking of the later-stage alloy material is prevented, and the melamine pyrophosphate of the core layer can be prevented from losing efficacy when encountering water through the protection effect of the polymer.

Further, the flame retardant comprises 5-7 parts by weight of heteropoly acid modified kaolin. The heteropoly acid modified kaolin has a synergistic effect, and the principle of the synergistic effect is as follows: the heteropoly acid modified kaolin can easily migrate to the surface of a polymer to form a compact carbon layer which is cooperated with an expanded carbon layer to play roles in heat insulation, oxygen isolation and oxygen inhibition.

Further, the heteropoly acid modified kaolin is molybdenum vanadium phosphorus heteropoly acid modified kaolin. In the molybdenum-vanadium-phosphorus heteropoly acid modified kaolin, molybdenum and vanadium can cooperate with the antibacterial agent in the invention to generate antibacterial action, because the antibacterial action of Ag is shown in the damage to bacteria in the process of electron migration, and the molybdenum and vanadium can assist the electron transfer of Ag, thereby improving the antibacterial action of Ag.

The invention also aims to provide an application method of the antibacterial flame-retardant material, which has the same effect.

The technical effects of the invention are realized by the following technical scheme:

the invention provides an application method of an antibacterial flame-retardant material, which is characterized in that the antibacterial flame-retardant material is used for preparing a PC/ABS alloy material, and the PC/ABS alloy material comprises the following components in parts by weight: 65-75 parts of PC, 5-15 parts of ABS, 15-20 parts of antibacterial flame-retardant material, 2-9 parts of toughening agent, 0.1-1 part of antioxidant and 0.1-1 part of anti-dripping agent.

Furthermore, the toughening agent is a compound of an acrylate core-shell type impact modifier and a silicone impact modifier. The silicon-based flexibilizer has a toughening effect and a synergistic effect with the flame retardant, forms a carbon protective layer on the surface of the material, generates a free radical capture active intermediate, and can assist heteropolyacid modified kaolin to form a more compact carbon layer, so that the silicon-based flexibilizer is equivalent to a carbon-type smoke suppressant.

Further, the anti-dripping agent is modified polytetrafluoroethylene resin or modified polyurethane resin.

Further, the antioxidant is olive shell extract. The olive shell extract contains saponins which have antioxidant effect, and also contains secoiridoid which has antibacterial effect.

Further, the density of PC is 1.18-1.20 g/cm³The melt flow rate is 5-8 g/10min under the condition of 300 ℃ multiplied by 1.2 kg.

Further, the ABS density is 1.03-1.07 g/cm³The melt flow rate is 5-10 g/10min under the condition of 220 ℃ multiplied by 10 kg.

Furthermore, in the application method of the antibacterial flame-retardant material provided by the invention, the flame retardant and the PC are pre-blended, the flame retardant can be fixed in a three-dimensional network result of the PC through a crosslinking reaction, and a flame-retardant carbon layer with higher stability is formed on the surface of the flame retardant.

Preferably, the application method of the antibacterial flame-retardant material provided by the invention specifically comprises the following operation steps:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing ABS, a toughening agent, an antioxidant and an anti-dripping agent into a side position scale, producing in a double-screw extruder, cooling extruded strips through a water tank, and then cutting into particles to obtain the PC/ABS alloy material.

As the optimization of the technical scheme, in the preparation method of the antibacterial low-smoke density flame-retardant PC/ABS alloy material, the parameters of each section of the double-screw machine are set as follows: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided. The two and three zones are set according to the melting temperature of the material. The back section is a dispersing, distributing and conveying section, and the temperature is reduced by 10 ℃ to avoid yellowing and degradation caused by high temperature for a long time.

In conclusion, the invention has the following beneficial effects:

the antibacterial flame retardant provided by the invention can obviously improve the toughness of the PC/ABS material and reduce the smoke release amount, and the flame retardant effect and the impact resistance are improved by the compound use of the flame retardant, the synergist and the PC.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given of an antibacterial flame-retardant material and its application method, its specific embodiments, features and effects.

Example 1: antibacterial flame-retardant material and application method thereof

Antibacterial flame retardant: the composition comprises the following components in parts by weight: 10-20 parts of a flame retardant and 0.1-1 part of an antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 5-10 parts of phosphorus oxychloride, 4-8 parts of melamine and 3-5 parts of ferrocenyl polymer. The preparation method of the antibacterial fire retardant comprises the steps of uniformly mixing the antibacterial agent and the fire retardant under the water bath condition of 60 ℃, and drying.

The application method of the antibacterial flame retardant in the embodiment is to apply the antibacterial flame retardant material to the preparation of the PC/ABS alloy material, and the specific operation steps are as follows:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting the extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The invention provides a preparation method of an antibacterial low-smoke density flame-retardant PC/ABS alloy material, which comprises the following steps of setting parameters of each section of a double-screw machine: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided.

Wherein, the PC/ABS alloy material comprises the following components in parts by weight: 65-75 parts of PC, 5-15 parts of ABS, 15-20 parts of antibacterial flame-retardant material, 2-9 parts of toughening agent, 0.1-1 part of antioxidant and 0.1-1 part of anti-dripping agent.

Example 2: antibacterial flame-retardant material and application method thereof

Antibacterial flame retardant: the composition comprises the following components in parts by weight: 10 parts of flame retardant and 0.1 part of antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 5 parts of phosphorus oxychloride, 4 parts of melamine and 3 parts of ferrocenyl polymer.

The preparation method of the antibacterial fire retardant comprises the steps of uniformly mixing the antibacterial agent and the fire retardant under the water bath condition of 60 ℃, and drying.

The application method of the antibacterial flame retardant in the embodiment is to apply the antibacterial flame retardant material to the preparation of the PC/ABS alloy material, and the specific operation steps are as follows:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting the extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The invention provides a preparation method of an antibacterial low-smoke density flame-retardant PC/ABS alloy material, which comprises the following steps of setting parameters of each section of a double-screw machine: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided.

Wherein, the PC/ABS alloy material comprises the following components in parts by weight: 65 parts of PC, 12 parts of ABS, 18 parts of antibacterial flame-retardant material, 8 parts of toughening agent, 0.5 part of antioxidant and 0.6 part of anti-dripping agent.

Wherein the density of PC is 1.18-1.20 g/cm³The melt flow rate is 5-8 g/10min under the condition of 300 ℃ multiplied by 1.2 kg. The density of ABS is 1.03-1.07 g/cm³The melt flow rate is 5-10 g/10min under the condition of 220 ℃ multiplied by 10 kg.

Example 3: antibacterial flame-retardant material and application method thereof

Antibacterial flame retardant: the composition comprises the following components in parts by weight: 8 parts of flame retardant and 0.5 part of antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: phosphorus oxychloride 7, melamine 4 parts and ferrocenyl polymer 4 parts.

The preparation method of the antibacterial fire retardant comprises the steps of uniformly mixing the antibacterial agent and the fire retardant under the water bath condition of 60 ℃, and drying.

The antimicrobial agent in this example was Pt₂Ag₄The preparation method of the/MgAl-LDHs comprises the following steps: weigh 0.50g K₂PtCl₄And proper amount of silver lignosulfonate sol are dissolved in deionized water to obtain the product with n (Pt) 1 to (0.3-2). Simultaneously adding the powder into a beaker weighed with 0.50g of magnesium-aluminum hydrotalcite, continuously stirring for 5 hours in a constant-temperature water bath kettle at the temperature of 80 ℃, filtering, washing for 3-5 times by using deionized water, and drying for 8 hours at the temperature of 60 ℃ to obtain Pt₂Ag₄/MgAl-LDH。

The application method of the antibacterial flame retardant in the embodiment is to apply the antibacterial flame retardant material to the preparation of the PC/ABS alloy material, and the specific operation steps are as follows:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting the extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The invention provides a preparation method of an antibacterial low-smoke density flame-retardant PC/ABS alloy material, which comprises the following steps of setting parameters of each section of a double-screw machine: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided.

Wherein, the PC/ABS alloy material comprises the following components in parts by weight: 68 parts of PC, 6 parts of ABS, 16 parts of an antibacterial flame-retardant material, 8 parts of a toughening agent, 0.2 part of an antioxidant and 0.4 part of an anti-dripping agent.

Wherein the density of PC is 1.18-1.20 g/cm³The melt flow rate is 5-8 g/10min under the condition of 300 ℃ multiplied by 1.2 kg. The density of ABS is 1.03-1.07 g/cm³The melt flow rate is 5-10 g/10min under the condition of 220 ℃ multiplied by 10 kg.

Example 4: antibacterial flame-retardant material and application method thereof

Antibacterial flame retardant: the composition comprises the following components in parts by weight: 12 parts of flame retardant and 0.4 part of antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 5 parts of phosphorus oxychloride, 4 parts of melamine and 3 parts of ferrocenyl polymer.

The preparation method of the antibacterial fire retardant comprises the steps of uniformly mixing the antibacterial agent and the fire retardant under the water bath condition of 60 ℃, and drying.

The antimicrobial agent in this example was Pt₂Ag₄The preparation method of the/MgAl-LDHs comprises the following steps: weigh 0.40g K₂PtCl₄And proper amount of silver lignosulfonate sol are dissolved in deionized water to obtain the product with n (Pt) 1 to (0.3-2). Simultaneously adding the powder into a beaker weighed with 0.50g of magnesium-aluminum hydrotalcite, continuously stirring for 5 hours in a constant-temperature water bath kettle at the temperature of 80 ℃, filtering, washing for 3-5 times by using deionized water, and drying for 8 hours at the temperature of 60 ℃ to obtain Pt₂Ag₄a/MgAl-LDHs catalyst.

The application method of the antibacterial flame retardant in the embodiment is to apply the antibacterial flame retardant material to the preparation of the PC/ABS alloy material, and the specific operation steps are as follows:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting the extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The invention provides a preparation method of an antibacterial low-smoke density flame-retardant PC/ABS alloy material, which comprises the following steps of setting parameters of each section of a double-screw machine: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided.

Wherein, the PC/ABS alloy material comprises the following components in parts by weight: 67 parts of PC, 7 parts of ABS, 16 parts of an antibacterial flame-retardant material, 3 parts of a toughening agent, 0.2 part of an antioxidant and 0.9 part of an anti-dripping agent.

The density of PC is 1.18-1.20 g/cm³The melt flow rate is 5-8 g/10min under the condition of 300 ℃ multiplied by 1.2 kg. The density of ABS is 1.03-1.07 g/cm³The melt flow rate is 5-10 g/10min under the condition of 220 ℃ multiplied by 10 kg.

Example 5: antibacterial flame retardant: the composition comprises the following components in parts by weight: 15 parts of flame retardant and 0.9 part of antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: phosphorus oxychloride 7, melamine 4 parts and ferrocenyl polymer 4 parts.

The preparation method of the antibacterial fire retardant comprises the steps of uniformly mixing the antibacterial agent and the fire retardant under the water bath condition of 60 ℃, and drying.

The antimicrobial agent in this example was Pt₂Ag₄The preparation method of the/MgAl-LDHs comprises the following steps: weigh 0.40g K₂PtCl₄And proper amount of silver lignosulfonate sol are dissolved in deionized water to obtain the product with n (Pt) 1 to (0.3-2). Simultaneously adding into a beaker weighed with 0.50g of magnesium-aluminum hydrotalcite, and keeping the temperature at 80 DEG CContinuously stirring for 5h in a water bath, filtering, washing for 3-5 times by using deionized water, and drying for 8h at 60 ℃ to obtain Pt₂Ag₄a/MgAl-LDHs catalyst.

The application method of the antibacterial flame retardant in the embodiment is to apply the antibacterial flame retardant material to the preparation of the PC/ABS alloy material, and the specific operation steps are as follows:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting the extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The invention provides a preparation method of an antibacterial low-smoke density flame-retardant PC/ABS alloy material, which comprises the following steps of setting parameters of each section of a double-screw machine: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided.

Wherein, the PC/ABS alloy material comprises the following components in parts by weight: 70 parts of PC, 12 parts of ABS, 16 parts of antibacterial flame-retardant material, 8 parts of toughening agent, 0.6 part of antioxidant and 0.6 part of anti-dripping agent.

The density of PC is 1.18-1.20 g/cm³The melt flow rate is 5-8 g/10min under the condition of 300 ℃ multiplied by 1.2 kg. The density of ABS is 1.03-1.07 g/cm³The melt flow rate is 5-10 g/10min under the condition of 220 ℃ multiplied by 10 kg.

Example 6: antibacterial flame-retardant material and application method thereof

Antibacterial flame retardant: the composition comprises the following components in parts by weight: 12 parts of flame retardant and 0.4 part of antibacterial agent; the antibacterial agent is AgPt intercalated hydrotalcite; the flame retardant comprises the following components: 8 parts of phosphorus oxychloride, 6 parts of melamine and 3 parts of ferrocenyl polymer.

The preparation method of the antibacterial fire retardant comprises the steps of uniformly mixing the antibacterial agent and the fire retardant under the water bath condition of 60 ℃, and drying.

The antimicrobial agent in this example is PtAg₄The preparation method of the/MgAl-LDHs comprises the following steps: weigh 0.30g K₂PtCl₄And proper amount of silver lignosulfonate sol are dissolved in deionized water to obtain the product with n (Pt) 1 to (0.3-2). Simultaneously adding the powder into a beaker weighed with 0.50g of magnesium-aluminum hydrotalcite, continuously stirring for 5 hours in a constant-temperature water bath kettle at the temperature of 80 ℃, filtering, washing for 3-5 times by using deionized water, and drying for 8 hours at the temperature of 60 ℃ to obtain the PtAg₄a/MgAl-LDHs catalyst.

The application method of the antibacterial flame retardant in the embodiment is to apply the antibacterial flame retardant material to the preparation of the PC/ABS alloy material, and the specific operation steps are as follows:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, pre-blending PC and the antibacterial flame-retardant material to obtain a blend;

s3, placing the blend obtained in the step S2 into a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent into a side position scale, producing in a double-screw extruder, and cutting the extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The invention provides a preparation method of an antibacterial low-smoke density flame-retardant PC/ABS alloy material, which comprises the following steps of setting parameters of each section of a double-screw machine: the temperature of the first zone is 30 ℃, the temperature of the second zone is 250-. The temperature of the first zone is normal temperature, so that the material is quickly conveyed into the screw rod, and the material accumulation at the feed opening is avoided.

Wherein, the PC/ABS alloy material comprises the following components in parts by weight: 66 parts of PC, 5 parts of ABS, 17 parts of an antibacterial flame-retardant material, 6 parts of a toughening agent, 0.8 part of an antioxidant and 0.6 part of an anti-dripping agent.

The density of PC is 1.18-1.20 g/cm³The melt flow rate is 5-8 g/10min under the condition of 300 ℃ multiplied by 1.2 kg. ABS density of 1.03～1.07g/cm³The melt flow rate is 5-10 g/10min under the condition of 220 ℃ multiplied by 10 kg.

Comparative example: antibacterial low-smoke-density flame-retardant PC/ABS alloy material and preparation method thereof

An antibacterial low-smoke-density flame-retardant PC/ABS alloy material comprises the following components in parts by weight: comprises the following components: 75 parts of PC, 15 parts of ABS, 9 parts of a toughening agent, 1 part of an antioxidant and 1 part of an anti-dripping agent.

The preparation method comprises the following steps:

the method specifically comprises the following operation steps:

s1, drying the PC, the ABS, the toughening agent and the antioxidant;

s2, placing the PC in a main position scale, placing the ABS, the toughening agent, the antioxidant and the anti-dripping agent in a side position scale, producing in a double-screw extruder, and cutting extruded strips into particles after cooling in a water tank to obtain the PC/ABS alloy material.

The raw materials used in the invention are as follows:

PC (polycarbonate), brand No.: 1920T-11, Luxi;

ABS (acrylonitrile-butadiene-styrene copolymer), brand: 8391, high-bridge petrochemical production;

the product performance testing method comprises the following steps:

drying the PC/ABS alloy materials prepared in the examples 1-6 and the comparative example in a blowing oven at 80-90 ℃ for 3-4 hours, then carrying out injection molding on the dried PC/ABS alloy material on an injection molding machine to prepare a sample, and carrying out the following tests:

and (3) testing the bending strength: the test specimens were 127X 12.7X 3.2mm in size, 2mm/min in bending speed and 50mm in span, according to ASTM D790.

Flexural modulus test: the test specimens were 127X 12.7X 3.2mm in size, 2mm/min in bending speed and 50mm in span, according to ASTM D790.

Testing the notch impact strength of the cantilever beam: the test specimens were measured according to ASTM D256 and had dimensions of 63X 12.7X 3.2 mm.

Testing the smoke density: the test specimens were 25.5X 25.4X 6mm in size, tested according to GB24407-2012 standard.

And (3) flame retardant test: the test specimens were 127X 12.7X 1.6mm in size, measured according to the UL94 standard.

And (3) testing the antibacterial rate: and testing according to the GB/T31402 standard, wherein the Escherichia coli and the staphylococcus aureus are tested.

The mechanical properties of the material are judged by testing the values of the bending strength, the bending modulus and the notch impact strength.

According to the table, the antibacterial flame retardant provided by the invention has a remarkable antibacterial flame retardant effect.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.