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Water-absorbent rubber made from hydrophilic fiber and preparation method of water-absorbent rubber

A technology of water-absorbing swellable rubber and hydrophilic fibers, which is applied in the direction of liquid-repellent fibers, fiber types, and fiber treatments, can solve the problems of reduced mechanical properties and poor compatibility of WSR, and achieve improved mechanical properties, High water absorption and improved interfacial adhesion

Active Publication Date: 2016-11-16
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that although the addition of polyethylene glycol can form a large number of water absorption channels and improve the water absorption performance of WSR, polyethylene glycol is a crystalline polymer and has poor compatibility in rubber, which will lead to a decrease in the mechanical properties of WSR.

Method used

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  • Water-absorbent rubber made from hydrophilic fiber and preparation method of water-absorbent rubber
  • Water-absorbent rubber made from hydrophilic fiber and preparation method of water-absorbent rubber
  • Water-absorbent rubber made from hydrophilic fiber and preparation method of water-absorbent rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Completely infiltrate 6g acrylic fiber in 100mL NaOH solution with a concentration of 20% by mass, then add 100mL glycerin, heat to 90℃, react at a constant temperature for 2h, after the reaction is over, adjust the reaction product to pH 5-6 with dilute hydrochloric acid, and then use Wash it with distilled water several times and place it in a vacuum drying oven at 50°C to dry it to obtain a hydrophilic modified acrylic fiber for use. The acrylic fiber before and after the hydrophilic modification was tested by infrared and scanning by electron microscope.

[0033] The infrared spectrum and analysis results of acrylic fiber before and after hydrophilic modification are shown in figure 1 And table 1.

[0034] Table 1

[0035]

[0036]

[0037] by figure 1 As shown in Table 1, the characteristic absorption of acrylonitrile is 2240.03 cm-1 (the stretching vibration of the nitrile group) and 1447.04 cm-1 (the bending vibration of C-H). Compared figure 1 In (a) and (b), it can ...

Embodiment 2

[0040] Completely infiltrate 6g acrylic fiber in 160mL NaOH solution with a concentration of 20% by mass, then add 40mL ethylene glycol, heat to 100℃, react at constant temperature for 1.5h, after the reaction, adjust the reaction product to pH 5~6 with dilute hydrochloric acid , And then washed several times with distilled water, and dried it in a vacuum drying oven at 40°C to obtain hydrophilic modified acrylic fiber for use.

Embodiment 3

[0042] Completely infiltrate 6g acrylic fiber in 40mL KOH solution with a concentration of 2% by mass, then add 160mL ethylene glycol, heat to 70℃, react at constant temperature for 4h, after the reaction, adjust the reaction product to pH5~6 with dilute sulfuric acid aqueous solution , And then washed several times with distilled water, and dried it in a vacuum drying oven at 40°C to obtain hydrophilic modified acrylic fiber for use.

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Abstract

The invention relates to water-absorbent rubber made from hydrophilic fiber and a preparation method of the water-absorbent rubber. The water-absorbent rubber is prepared from raw materials including, by weight, 100 parts of nitrile rubber, 1.5 parts of an active agent A, 5 parts of an active agent B, 1.5 parts of an antiager, 40 parts of a reinforcing filler, 1.5 parts of a vulcanizing accelerator A, 1.5 parts of a vulcanizing accelerator B, 1.5 parts of a vulcanizing agent, 40-80 parts of water-absorbent resin, 1-10 parts of the hydrophilic fiber and 0-10 parts of a bulking agent. The invention further relates to the preparation method of the water-absorbent rubber. The water-absorbent rubber is high in water absorption rate, good in mechanical property and capable of being widely applied to the field of sealing materials high in rubber absorption property and mechanical property requirements.

Description

Technical field [0001] The invention relates to a water-absorbing swellable rubber made of hydrophilic fibers and a preparation method thereof, and belongs to the field of polymer materials. Background technique [0002] As a new type of functional polymer material, Water Swelling Rubber (WSR) has attracted wide attention in leak-stopping engineering due to its unique water-stop sealing and water-stop properties. WSR is made by introducing hydrophilic functional groups or hydrophilic components into the elastic matrix. Because it expands and deforms after absorbing water and fills irregular surfaces, cavities and gaps, and at the same time generates huge contact pressure, which can completely prevent leakage, WSR has a good application prospect and a huge market in the field of waterproof sealing. [0003] The most commonly used method in the industry is to use physical blending to prepare water-swelling rubber, that is, water-swelling rubber is mainly prepared by physical and mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L51/04C08L33/02C08L33/20C08K13/02C08K5/09C08K3/22C08K5/18C08K3/04C08K5/47D06M11/38D06M13/148D06M101/28
CPCC08L9/02C08L2205/035C08L2205/16D06M11/38D06M13/148D06M2101/28D06M2200/11C08L51/04C08L33/02C08L33/20C08K13/02C08K5/09C08K2003/2296C08K5/18C08K3/04C08K5/47
Inventor 杨隽范志玮潘小杰王芬徐黎刚徐恩松
Owner WUHAN INSTITUTE OF TECHNOLOGY
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