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Surface modification method of aramid, and reinforced natural rubber material and preparation method thereof

A technology of surface modification and natural rubber, which is applied in the field of polymer science, can solve problems such as the decrease of rubber molecular weight, failure to obtain composite materials, and excessive reduction of fiber length, etc., to achieve improved interface bonding strength, good interface bonding, Good effect of fiber dispersion

Inactive Publication Date: 2013-08-14
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersion of fibers is another technical problem in the industry. Excessive kneading in order to make the fibers dispersed uniformly will lead to excessive reduction in fiber length, decrease in rubber molecular weight, and deterioration of performance; if the fiber length is long but the dispersion is uneven Composite materials with less than excellent performance

Method used

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  • Surface modification method of aramid, and reinforced natural rubber material and preparation method thereof
  • Surface modification method of aramid, and reinforced natural rubber material and preparation method thereof
  • Surface modification method of aramid, and reinforced natural rubber material and preparation method thereof

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Embodiment 2

[0020] Example 2 of the present invention: Surface modification method of aramid fiber, cut aramid filament (brand: AF-1000, 1500 denier, South Korea ALKEX) into 20mm sections, ultrasonically clean the aramid fiber with acetone for 0.5 hours and then dry it , Remove the organic coating attached to the surface; then immerse the aramid fiber with 10% phosphoric acid solution at 20℃ for 3 hours, then take it out, wash and dry, and then use 20% epoxy The acetone solution of resin (bisphenol A type, grade E44) is impregnated with aramid fiber at room temperature for 1 hour. After drying, the surface modification of aramid fiber is completed, and modified aramid fiber is obtained for use.

[0021] Modified aramid and vulcanized natural rubber composite material, calculated by weight fraction, including 100 parts of natural rubber (No. 1 standard rubber, Xishuangbanna Mengxian Guanlei Rubber Factory), 2 parts of modified aramid, 2 parts of hydroxyl end groups Liquid rubber (brand: L2R-5...

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Abstract

The invention discloses a surface modification method of aramid, a reinforced natural rubber material and a preparation method thereof. The surface modification method of aramid comprises the following steps of: dipping aramid fibre for 0.5-3h by using phosphoric acid solution at 20-50 DEG C, after cleaning and drying, dipping aramid fibre for 1-2h by using acetone solution of epoxy resin with the mass percentage concentration of 5-20% at normal temperature, and then modifying the surface of aramid after drying. According to the invention, active groups of surface modified aramid and terminated hydroxyl of epoxy resin and liquid rubber are chemically reacted simultaneously at mixing temperature, so that the interfacial bonding strength is improved; liquid rubber and matrix rubber are vulcanized together in the subsequent vulcanizing process of mixing rubber, so that a cross-linked network tightly combined with aramid fibre is formed; the problem that the matrix rubber in an original physical manner forms a self cross-linked network while being vulcanized is overcome, and therefore, negative phenomena of a rubber and aramid fibre interface can be reduced; and the aramid reinforced rubber composite material having good interfacial bonding and fibre dispersion can be formed.

Description

Technical field [0001] The invention relates to the field of polymer science, in particular to a method for modifying the surface of aramid fiber, a product thereof, and a preparation method of the product. Background technique [0002] Aramid fiber (AF) with high stiffness and high strength is an ideal rubber reinforcement material, but the surface of the aramid fiber is very smooth, with few active functional groups, low reactivity, and great inertness, especially its high crystallinity, making it The poor interface adhesion with rubber materials and poor fiber dispersion seriously affect the performance of composite materials. Therefore, the surface activation treatment of aramid fiber and its uniform dispersion in the matrix material is an excellent preparation performance of aramid reinforced rubber composite The key technology of materials. At present, the surface treatment of aramid fiber of the aramid / rubber composite material that has entered the industrial application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55D06M11/70C08J5/06C08J3/24C08L7/00C08L15/00
Inventor 罗筑杨诗润鲁圣军秦舒浩陈兴江刘一春
Owner GUIZHOU UNIV
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