阅读说明：本技术 一种高强度抗老化玻璃纤维棉毡 (High-strength anti-aging glass fiber cotton felt ) 是由 陈照峰 李顺 于 2020-05-20 设计创作，主要内容包括：一种高强度抗老化玻璃纤维棉毡,由高强度玻璃纤维棉与改性粘结剂组成,所述高强度玻璃纤维棉由SiO<Sub>2</Sub>、Al<Sub>2</Sub>O<Sub>3</Sub>、MgO、TiO<Sub>2</Sub>、CaO、和Li<Sub>2</Sub>O组成的玻璃原料经熔融与1000～1200℃高温火焰拉丝得到,直径在在1.5～3.0μm范围内呈正态分布,所述的改性粘结剂由改性酚醛树脂与复合基料组成。本发明同时对玻璃纤维棉与粘结剂进行改良优化,制备出的产品强度、抗老化性能与使用寿命提升明显,且性能稳定。(The high-strength anti-aging glass fiber cotton felt consists of high-strength glass fiber cotton and a modified binder, wherein the high-strength glass fiber cotton is made of SiO 2 、Al 2 O 3 、MgO、TiO 2 CaO, and Li 2 The glass raw material consisting of O is obtained by melting and high-temperature flame drawing at 1000-1200 ℃, the diameter of the glass raw material is normally distributed within the range of 1.5-3.0 mu m, and the modified binder consists of modified phenolic resin and composite base material. The invention improves and optimizes the glass fiber cotton and the binder at the same time, and the prepared product has obviously improved strength, ageing resistance and service life and stable performance.)

1. The high-strength anti-aging glass fiber cotton felt is composed of high-strength glass fiber cotton and a modified binder, and is characterized in that the high-strength glass fiber cotton is composed of 40-70 parts of SiO₂15 to 25 parts of Al₂O₃5 to 10 parts of MgO, 5 to 10 parts of CaO, 0.5 to 1 part of TiO₂0.75 to 1 part of ZrO₂Melting the glass raw material into liquid by a kiln, and performing high-temperature flame injection and wire drawing to form the glass; the modified binder is prepared from 30-50 parts of modified phenolic resin, 6-10 parts of reinforcing agent, 1-10 parts of urea, 1-10 parts of melamine, 1-10 parts of silane coupling agent (KH550) and 1-6 parts of ammonium sulfate through a certain synthesis process, wherein the parts are in parts by weight.

2. The high-strength glass fiber cotton felt according to claim 1, wherein the natural gas flow rate during the high-temperature flame blowing drawing process is controlled to be 45-60 m³And h, controlling the blowing temperature to be 800-1000 ℃, wherein the fiber diameter of the high-strength glass fiber cotton felt is normally distributed within the range of 1.5-3.0 mu m.

3. The high-strength anti-aging glass fiber cotton felt according to claim 1, wherein the modified phenolic resin is synthesized by 50-100 parts by weight of phenol, 75-120 parts by weight of formaldehyde, 5-10 parts by weight of octadecylamine, 0.2-0.5 part by weight of graphene oxide and 0.8-1.0 part by weight of catalyst sodium hydroxide at 70-90 ℃ through an in-situ polymerization method; the graphene may be single-layer graphene or multi-layer graphene, with single-layer graphene being preferred.

4. The high-strength anti-aging glass fiber cotton felt according to claim 1, wherein the reinforcing agent is obtained by mixing 10-18 parts of cationic polyacrylamide and 5-9 parts of polyaluminum chloride; the modified adhesive is obtained by adding a reinforcing agent, urea, melamine, a silane coupling agent and ammonium sulfate into the modified phenolic resin in sequence and mixing, wherein the parts are parts by weight.

Technical Field

The invention relates to the field of organic polymers, in particular to a high-strength anti-aging glass fiber cotton felt and a preparation method thereof.

Background

The glass fiber cotton felt is a felt-shaped glass product material with a fixed shape, which is obtained by melting and fiberizing a glass raw material, then forming cotton-shaped short fibers by a centrifugal or flame spraying method, and finally applying a certain adhesive and curing. With the rapid development of economy and industry, people have higher and higher requirements on the performance of various materials, and glass fiber cotton mats are also included in the materials as inorganic materials which are widely used for a long time, the traditional glass fiber cotton mats are mainly used in the fields of heat insulation and sound insulation of buildings and industries, and the fields have no special requirements on other performances of the cotton mats, but the application of the glass fiber cotton mats is gradually developed from low-end fields such as buildings to high-end fields such as aerospace, so people pay more attention to the heat insulation and sound insulation performance of the glass fiber cotton mats and also put higher requirements on other performances such as strength and ageing resistance, which is difficult to meet the requirements of the traditional preparation process at the same time.

The invention patent with the publication number of CN109703119A discloses an oil-resistant and wear-resistant glass fiber felt modified by waterborne polyurethane and a preparation method thereof, the invention adopts the waterborne polyurethane to modify the glass fiber felt, has no pollution, is safe and reliable, can improve the excellent mechanical property of the glass fiber felt, and ensures that the glass fiber felt has good oil-resistant and wear-resistant properties; simultaneously graphite alkene boundary C and Si bond, and the cohesion between the layer is better, has good mechanical properties, is difficult to the fracture to drop under extreme condition, and the glass fiber cotton felt that makes is evenly covered by graphite alkene layer, has not only improved holistic mechanical strength, has improved the heat conductivity moreover, can replace the carbon fiber under certain circumstances, has the practicality, can be used in more manifold field.

The invention patent with publication number CN111058186A discloses a preparation method and a product of a high-strength sound-proof heat-insulation glass fiber cotton felt, and the method specifically comprises the following steps: the glass fiber cotton is sprayed out from a cotton spraying opening and then enters a cotton collecting cover, glue is sprayed in the cotton collecting cover and then falls on a forming mesh belt, and the high-strength sound-insulation and heat-insulation glass fiber cotton felt is prepared after rolling and shaping. The invention ensures that the glass fiber cotton can be uniformly glued in the glue spraying process by using the cotton collecting cover with a specific structure, and enhances the binding force among the glass fibers, thereby improving the mechanical strength of the glass fiber cotton felt. The method is simple and easy to operate, has low cost and is suitable for industrial production. The invention patent with publication number CN105733178B discloses a preparation method of wear-resistant and anti-aging resin, which comprises the following steps: 1) putting phenol and formaldehyde into a reaction kettle, adding a catalyst, heating and carrying out heat preservation reaction to obtain a condensation liquid; 2) putting rosin into a reaction kettle, heating, adding lignin and a catalyst, carrying out heat preservation reaction, sequentially adding alkylamine and melamine, heating again, carrying out heat preservation reaction, adding polyvinyl alcohol and styrene, and continuing the heat preservation reaction; cooling, adding the condensation liquid while stirring, carrying out heat preservation reaction, and cooling; adding diamond powder, stirring and taking out of the pot to obtain the wear-resistant and anti-aging resin. The invention adopts proper process conditions such as raw material proportion, reaction temperature, reaction time, catalyst and the like, can effectively control viscosity in production, has simple and convenient operation, large elasticity and good effect, and obviously improves the quality of products, particularly the wear resistance and the aging resistance of resin.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, starts from the two aspects of modification of raw material components and a binder of a glass fiber cotton felt, and provides a high-strength anti-aging glass fiber cotton felt which is characterized by comprising high-strength glass fiber cotton and a modified binder, wherein the high-strength glass fiber cotton comprises 40-70 parts of SiO (silicon dioxide) by weight₂15 to 25 parts of Al₂O₃5 to 10 parts of MgO, 5 to 10 parts of CaO, 0.5 to 1 part of TiO₂0.75 to 1 part of ZrO₂The glass raw material is melted into liquid by a kiln and then is formed by high-temperature flame injection and wire drawing, wherein the natural gas flow is controlled to be 45-60 m in the high-temperature flame injection and wire drawing process³Controlling the blowing temperature to be 1000-1200 ℃, wherein the fiber diameter of the high-strength glass fiber cotton felt is normally distributed within the range of 1.5-3.0 mu m; the modified binder is prepared from 30-50 parts of modified phenolic resin, 6-10 parts of reinforcing agent, 1-10 parts of urea, 1-10 parts of melamine, 1-10 parts of silane coupling agent (KH550) and 1-6 parts of ammonium sulfate through a certain synthesis process, wherein the modified phenolic resin is prepared from 50-100 parts of phenol, 75-120 parts of formaldehyde, 5-10 parts of octadecylamine, 0.2-0.5 part of graphene oxide and 0.8-1.0 part of catalyst sodium hydroxide through in-situ polymerization at 70-90 ℃, the graphene can be single-layer graphene or multi-layer graphene, and single-layer graphene is preferred; the reinforcing agent is prepared by mixing 10-18 parts of cationic polyacrylamide and 5-9 parts of polyaluminium chloride; the high-strength binder is obtained by adding a reinforcing agent, urea, melamine, a silane coupling agent and ammonium sulfate into the modified phenolic resin in sequence and mixing.

The parts are parts by weight.

The invention has the following beneficial effects: (1) the invention firstly carries out reasonable proportioning design on the raw materials for producing the glass fiber cotton, greatly improves the mechanical property and the acid and alkali corrosion resistance of the glass fiber cotton on the premise of simplifying the process as much as possible, thereby directly improving the performance of the glass fiber cotton; (2) according to the invention, the binder base material and the auxiliary agent are improved and designed, phenolic resin molecular chains in the graphene oxide modified phenolic resin prepared by using an in-situ polymerization method grow on graphene sheet layers, and due to the existence of a cross-linking network in a phenolic resin system, graphene is firmly locked in a polymer network and minimally moves to the surface, so that continuous and compact carbon layers are finally formed, and the compact carbon layers can play a role in blocking moisture penetration in the using process and can improve the ageing resistance of the binder by combining with octadecylamine; (3) the invention adopts the cationic polyacrylamide and the polyaluminium chloride modified phenolic resin binder, and can improve the bonding strength of the binder. The product prepared by the technology disclosed by the invention has high strength and long service life, and the preparation method is simple and feasible.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present specification and which fall within the limits of the appended claims.