Method for preparing aramid fiber surface coating

An aramid fiber and surface coating technology, applied in the field of polymer coating preparation, can solve the problems of easy decomposition, easy corrosion of the surface of aramid fiber, poor bonding effect of silicone resin, etc. Layer effect, strong bonding effect

Active Publication Date: 2014-07-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing the surface coating of aramid fiber in order to solve the problems that th

Method used

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  • Method for preparing aramid fiber surface coating
  • Method for preparing aramid fiber surface coating

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specific Embodiment approach 1

[0015] Specific embodiment one: the preparation method of a kind of aramid fiber surface coating of the present embodiment is to realize according to the following steps:

[0016] 1. Pretreatment of aramid fibers: Soak aramid fibers in acetone for 20-24 hours, remove the surface coating, then dry them in an oven at 60-80°C for 30 minutes, and activate them with dilute sulfuric acid for 1-2 hours ,spare;

[0017] 2. Preparation of nanoscale titanium dioxide gel: Disperse 3-4mL butyl titanate in 22-30mL absolute ethanol and magnetically stir for 30-40min to obtain an ethanol dispersion of butyl titanate; take 1-2mL deionized water , 15-20mL of absolute ethanol and 0.5-1mL of glacial acetic acid were mixed, and then stirred magnetically for 15-20min at a stirring rate of 1000r / min, and then dripped at a rate of 8-10s / d Add it to the ethanol dispersion of butyl titanate, and then react for 4-6 hours to obtain nanoscale titanium dioxide gel;

[0018] 3. Modified silicone resin: d...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the aramid fiber is soaked in acetone for 22 hours as described in Step 1. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the dilute sulfuric acid described in step 1 has a mass percentage of 12% to 15%. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing an aramid fiber surface coating and relates to preparation of polymer coatings (titanium dioxide modified methyl silicone resins) and treatment of aramid fiber surface. The heat resistance and ultraviolet resistance of the aramid fiber are improved. The invention aims to solve the problems that the surface of a conventional aramid fiber is easily corroded, the aramid fiber is easily decomposed at high temperature and a binding effect between the aramid fiber and organic silicon resin is poor. Aramid fiber, acetone, sulfuric acid, butyl titanate and methyl silicone resin serve as raw materials, the aramid fiber is cleaned through the acetone, the surface coating is removed, and acidizing treatment (sulfuric acid) is performed, so that the surface activity is improved. The method comprises the following steps: preparing a titanium dioxide modified methyl silicone resin coating solution, impregnating the activated aramid fiber into the modified methyl silicone resin solution, and preparing the functional aramid fiber of which the surface is heat-resistant and ultraviolet-resistant. The method has the advantages that raw materials are simple, the cost is low, the operating process is convenient, and popularization and application are facilitated.

Description

technical field [0001] The invention relates to a method for preparing a surface coating, in particular to a method for preparing a polymer coating and treating a fiber surface. Background technique [0002] Aramid fiber is a kind of fiber with high temperature resistance, high strength and high elastic modulus. It has both the mechanical properties of inorganic fibers and the processing properties of organic fibers, and its density is equivalent to that of polyester fibers. At the same time, it also has excellent chemical corrosion resistance, radiation resistance, fatigue resistance, dimensional stability and other excellent properties, as well as certain adhesion properties with rubber resin. However, the surface of the aramid fiber is easily corroded and easily decomposed at high temperature. Coating the surface of the aramid fiber can solve this problem. Due to its superior performance, methyl silicone resin is an ideal material for coating the surface of temperature r...

Claims

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Application Information

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IPC IPC(8): D06M15/643D06M11/46D06M11/55D06M101/36
Inventor 姜波何珊黄玉东战捷祝长城蔡青福
Owner HARBIN INST OF TECH
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