阅读说明：本技术 抗菌改性聚氨酯记忆棉及制备方法 (Antibacterial modified polyurethane memory cotton and preparation method thereof ) 是由 朱建琪 于 2020-05-29 设计创作，主要内容包括：本发明公开了抗菌改性聚氨酯记忆棉的制备方法,其包括：将聚醚多元醇、异氰酸酯、发泡剂、催化剂、稳定剂及银分散液混合,制得第一混合物；将二氧化硅溶胶整理液及远红外添加剂混合,制得第二混合物；以及将所述第一混合物与所述第二混合物混合,注入模具。通过纳米银颗粒与远红外线的协同作用,提高了本发明制备的抗菌改性聚氨酯记忆棉的抗菌效果。(The invention discloses a preparation method of antibacterial modified polyurethane memory cotton, which comprises the following steps: mixing polyether polyol, isocyanate, a foaming agent, a catalyst, a stabilizer and silver dispersion to prepare a first mixture; mixing the silica sol finishing liquid and the far infrared additive to prepare a second mixture; and mixing the first mixture and the second mixture and injecting the mixture into a mold. The antibacterial effect of the antibacterial modified polyurethane memory cotton prepared by the invention is improved through the synergistic effect of the nano silver particles and the far infrared rays.)

1. The preparation method of the antibacterial modified polyurethane memory cotton comprises the following steps:

mixing polyether polyol, isocyanate, a foaming agent, a catalyst, a stabilizer and silver dispersion to prepare a first mixture;

mixing the silica sol finishing liquid and the far infrared additive to prepare a second mixture; and

and mixing the first mixture and the second mixture, and injecting the mixture into a mold.

2. The method of claim 1, wherein the first mixture comprises 40 to 60 parts by weight of polyether polyol, 10 to 15 parts by weight of isocyanate, 5 to 10 parts by weight of foaming agent, 1 to 5 parts by weight of catalyst, stabilizer and 10 to 20 parts by weight of silver dispersion.

3. The method for preparing the antibacterial modified polyurethane memory cotton as claimed in claim 2, wherein: the polyether polyol is propylene oxide polyether polyol; the isocyanate is selected from toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, isophorone diisocyanate, hydrogenated xylylene diisocyanate or a mixture thereof, preferably toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate or a mixture thereof; the foaming agent is selected from sodium dodecyl sulfate, sodium fatty alcohol-polyoxyethylene ether sulfate, dichloromethane, dichloroethane, pentane or a mixture thereof, preferably dichloromethane, dichloroethane, pentane or a mixture thereof; the catalyst is selected from a tin salt catalyst, an organobismuth compound, sodium chloride or a mixture thereof; the stabilizer is selected from organosilicon surfactants.

4. The method for preparing the antibacterial modified polyurethane memory cotton as claimed in claim 3, wherein:

mixing silver powder, dispersion liquid and surfactant to prepare silver dispersion liquid, wherein the dispersion liquid is preferably selected from alcohols, ketones, aldehydes, organic acids, N-methyl pyrrolidone, dimethylformamide, dimethylacetamide, chlorobenzene, dichlorobenzene or a mixture thereof, and more preferably selected from alcohols, dimethylformamide, dimethylacetamide or a mixture thereof; preferably, the surfactant is selected from sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, cetyl ammonium bromide, polyoxyethylene lauryl ethers, tweens, triton or mixtures thereof, more preferably sodium dodecylbenzene sulfonate, sodium dodecyl sulfate or mixtures thereof.

5. The method for preparing the antibacterial modified polyurethane memory cotton as claimed in claim 4, wherein: the surfactant accounts for 5-10% of the silver dispersion liquid by mass, and the silver powder accounts for 10-20% of the silver dispersion liquid by mass.

6. The method of claim 1, wherein the second mixture is prepared from 60 to 80 parts of silica sol finishing liquid, 10 to 30 parts of far infrared additive, 10 to 15 parts of adhesive and 10 to 15 parts of auxiliary agent.

7. The method for preparing the antibacterial modified polyurethane memory cotton as claimed in claim 6, wherein:

TEOS, EtOH and H₂O and HNO₃Stirring for 1-3 h to obtain a third mixture; and

and adding distilled water into the third mixture for dilution to prepare the silica sol finishing liquid.

8. The method for preparing the antibacterial modified polyurethane memory cotton as claimed in claim 7, wherein the infrared additive is selected from far infrared ceramic powder selected from Al₂O₃、MgO、TiO₂、SiC、ZrC、BN、AlN、Si₃N4, ZrN, carbon powder, graphite or a mixture thereof, preferably Al₂O₃MgO, SiC or mixtures thereof.

9. The method for preparing the antibacterial modified polyurethane memory cotton as claimed in claim 8, wherein:

mixing a silica sol finishing liquor, an infrared additive, a binder and an auxiliary agent to prepare the second mixture, wherein the binder is preferably selected from polyurethane, polyacrylate, nitrile rubber or a mixture thereof, and the auxiliary agent is preferably selected from silicone oil, fatty acid amide, oleic acid or a mixture thereof.

10. The antibacterial modified polyurethane memory foam prepared by the preparation method of the antibacterial modified polyurethane memory foam of any one of claims 1 to 9.

Detailed Description

In one aspect, the disclosure relates to a preparation method of antibacterial modified polyurethane memory cotton, which comprises the following steps:

mixing polyether polyol, isocyanate, a foaming agent, a catalyst, a stabilizer and silver dispersion to prepare a first mixture;

mixing the silica sol finishing liquid and the far infrared additive to prepare a second mixture; and

and mixing the first mixture and the second mixture, and injecting the mixture into a mold.

In certain embodiments, wherein the first mixture is made from, by weight parts, 40 to 60 parts polyether polyol, 10 to 15 parts isocyanate, 5 to 10 parts blowing agent, 1 to 5 parts catalyst, stabilizer, and 10 to 20 parts silver dispersion.

In certain embodiments, the polyether polyol is a propylene oxide polyether polyol.

In certain embodiments, the isocyanate is selected from toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, isophorone diisocyanate, hydrogenated xylylene diisocyanate, or mixtures thereof.

In certain embodiments, the isocyanate is selected from toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, or mixtures thereof

In certain embodiments, the foaming agent is selected from sodium lauryl sulfate, sodium fatty alcohol-polyoxyethylene ether sulfate, methylene chloride, dichloroethane, pentane, or mixtures thereof.

In certain embodiments, the blowing agent is selected from dichloromethane, dichloroethane, pentane, or mixtures thereof.

In certain embodiments, the catalyst is selected from a tin salt catalyst, an organobismuth compound, sodium chloride, or mixtures thereof; the stabilizer is selected from organosilicon surfactants.

Wherein: the stabilizer can reduce the surface tension to control the structure and uniformity of the foam pores, so that the foam with uniform micro-bubbles is prepared, and if the usage amount of the stabilizer is too much, the elasticity of the foam pore walls is enhanced, the foam is not easy to break, the foam pores are fine, and the foam pore closing phenomenon occurs; if the amount of the stabilizer is small, the foam stability is insufficient, foaming occurs, and the cells are coarse and uneven, and even collapse occurs.

The polymer polyol is added into the foam, so that the bearing capacity of the foam can be obviously improved, and meanwhile, the foaming rate of the foam can be increased, and the produced foam has high bearing capacity and flexibility.

In certain embodiments, wherein: mixing the silver powder, the dispersion liquid and the surfactant to prepare the silver dispersion liquid.

In certain embodiments, the dispersion is selected from the group consisting of alcohols, ketones, aldehydes, organic acids, N-methylpyrrolidone, dimethylformamide, dimethylacetamide, chlorobenzene, dichlorobenzene, or mixtures thereof.

In certain embodiments, the dispersion is selected from alcohols, dimethylformamide, dimethylacetamide, or mixtures thereof.

In certain embodiments, the surfactant is selected from the group consisting of sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, cetyl ammonium bromide, polyoxyethylene lauryl ethers, tweens, triton, or mixtures thereof.

In certain embodiments, the surfactant is selected from sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, cetyl ammonium bromide, or mixtures thereof.

In certain embodiments, the surfactant is present in the silver dispersion at 5% to 10% by weight and the silver powder is present in the silver dispersion at 10% to 20% by weight.

Wherein: the mass fraction range in the dispersion liquid can effectively improve the dispersion performance of the silver.

In certain embodiments, the second mixture is made from 60 to 80 parts of silica sol finishing liquor, 10 to 30 parts of far infrared additive, 10 to 15 parts of binder, and 10 to 15 parts of adjuvant.

In certain embodiments, wherein: TEOS, EtOH, H2O and HNO3 are stirred for 1 to 3 hours to prepare a third mixture; and

and adding distilled water into the third mixture for dilution to prepare the silica sol finishing liquid.

In certain embodiments, the infrared additive is selected from far infrared ceramic powders.

In certain embodiments, the far infrared ceramic powder is selected from Al₂O₃、MgO、TiO₂、SiC、ZrC、BN、AlN、Si₃N4, ZrN, carbon powder, graphite, or mixtures thereof.

In certain embodiments, the far infrared ceramic powder is selected from Al₂O₃MgO, SiC or mixtures thereof.

In certain embodiments, wherein: and mixing the silica sol finishing liquid, the infrared additive, the adhesive and the auxiliary agent to prepare the second mixture.

In certain embodiments, the silica sol finish, infrared additive, binder, and adjuvant are mixed for 1 to 3 minutes.

In certain embodiments, a baking process after mixing is also included.

In certain embodiments, the baking process comprises two stages.

In certain embodiments, the first stage of the baking process: the baking temperature is 70-80 ℃, and the baking time is 5-10 min.

In certain embodiments, the second stage of the baking process: the baking temperature is 100-120 ℃, and the baking time is 3-5 min.

In certain embodiments, the binder is selected from the group consisting of polyurethane, polyacrylate, nitrile rubber, or mixtures thereof.

Wherein: the selected adhesive has higher bonding capacity, the components can be contacted more tightly by adding the adhesive, the reaction is more sufficient, meanwhile, the adhesive is not easy to age, and the second mixture can be integrally protected.

In certain embodiments, the adjuvant is selected from silicone oil, fatty acid amide, oleic acid, or mixtures thereof.

On the other hand, the disclosure relates to an antibacterial modified polyurethane memory cotton, which is prepared by the following steps:

mixing polyether polyol, isocyanate, a foaming agent, a catalyst, a stabilizer and silver dispersion to prepare a first mixture;

mixing the silica sol finishing liquid and the far infrared additive to prepare a second mixture; and

and mixing the first mixture and the second mixture, and injecting the mixture into a mold.