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Preparation method of hydrophilic fiber modified water swelling hydrolyzed nitrile rubber

A technology of hydrophilic fiber and nitrile rubber, which is applied in fiber type, fiber treatment, textiles and papermaking, etc., can solve the problems of reducing water absorption and mechanical properties of WSR, achieve excellent performance, improve mechanical properties, and good capacitive effect

Active Publication Date: 2018-10-26
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The most commonly used method in industry is to use the physical blending method to prepare water-absorbing swelling rubber. Due to the large difference in properties between the hydrophilic component and the rubber, the hydrophilic component is easy to precipitate, thereby reducing the water absorption performance and mechanical properties of WSR. performance

Method used

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  • Preparation method of hydrophilic fiber modified water swelling hydrolyzed nitrile rubber
  • Preparation method of hydrophilic fiber modified water swelling hydrolyzed nitrile rubber
  • Preparation method of hydrophilic fiber modified water swelling hydrolyzed nitrile rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0037] Utilize hydrophilic acrylic fiber to prepare the specific application of water-absorbing swelling nitrile rubber, its step is as follows:

[0038] 1) Dissolve nitrile rubber in acetone, ultrasonically oscillate until the rubber is completely dissolved, then add 3mol / L sodium hydroxide glycerol-water solution, heat up to 50°C, and react for 24 hours, then pour the reaction solution into absolute ethanol , filter out the precipitate, wash with distilled water and dry to obtain hydrolyzed nitrile rubber. Among them, the volume ratio of glycerol to water is 1:9. The infrared spectra of hydrolyzed nitrile rubber and nitrile rubber were measured by Impact420 Fourier transform infrared spectrometer.

[0039] 2) Immerse the acrylic fiber in the glycerol-water mixed solution, add a certain amount of sodium hydroxide, raise the temperature to 90°C, and react for 3 hours, neutralize it with hydrochloric acid isopropanol solution until the pH is neutral, and filter out the fiber ...

Embodiment 6～11

[0057] 1) Put 100 parts of nitrile / hydrolyzed nitrile rubber in a double-roller open mill for 3~ After 5 minutes, add 1.5 parts, 5 parts of ZnO, 1 part of antioxidant N,N'-di(β-naphthyl)-p-phenylenediamine, and 1.5 parts of vulcanization accelerator 2,2'-dithio Dibenzothiazole, 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of sublimed sulfur, each additive is added and mixed for 1 to 2 minutes before adding the next one, Then add 10 parts of hydrophilic acrylic fibers and 60 parts of sodium polyacrylate, and knead for 10 minutes. Finally, add 20 parts of natural gas channel black and 20 parts of precipitated silica into the rubber matrix and knead evenly, and make triangle bags 6 times. , Bo Tong, the next film, stand for 8 hours for later use.

[0058] 2) Put the mixed nitrile rubber obtained in step 1) on the open mill, and then gradually increase the roll distance of the open mill from 2mm to 4mm, and let the rubber material pas...

Embodiment 12～16

[0065] 1) After masticating 100 parts of hydrolyzed nitrile rubber in a double-drum mill for 3 to 5 minutes, add 1.5 parts, 5 parts of ZnO, 1 part of anti-aging agent N-phenyl-2-naphthylamine, 1.5 parts Vulcanization accelerator 2-mercapto benzothiazole, 1.5 parts of vulcanization accelerator N-cyclohexyl-2-benzothiazole sulfenamide, 1.5 parts of sublimed sulfur, each auxiliary agent is added and mixed for 1 After ~2 minutes, add the next one, then add 10 parts of hydrophilic acrylic fiber, 40, 50, 60, 70, 80 parts of sodium polyacrylate, mix for 10 minutes, and finally, mix 20 parts of natural gas tank black and 20 parts of precipitation Add white carbon black to the rubber matrix and knead evenly, pack it into a triangle bag 6 times, thin it out, take it off, and let it stand for 8 hours for later use.

[0066] 2) Put the mixed nitrile rubber obtained in step 1) on the open mill, and then gradually increase the roll distance of the open mill from 2mm to 4mm, and let the rubb...

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Abstract

The invention discloses a preparation method of hydrophilic fiber modified water swelling hydrolyzed nitrile rubber. Nitrile rubber and hydrolyzed nitrile rubber are plastified in a double drum open mill for 3-5 min, then an active agent A, an active agent B, antiager, a vulcanization accelerator A, a vulcanization accelerator B and a vulcanizing agent are added in sequence, after each auxiliary is added, mixing is conducted for 1-2 min, and then the next auxiliary is added; hydrophilic fiber and water-absorbent resin are added, mixing is conducted for 10 min, finally, white carbon black and carbon black are added in a rubber matrix, the mixture is mixed to be uniform, triangle packaging is conducted six times, and mill run, sheeting and standing are conducted; after the obtained object isplaced on the open mill and subjected to mill run, the roller spacing of the open mill is gradually adjusted to be 4 mm from 2 mm, glue passes through a drum several times repeatedly to make the hydrophilic fiber oriented in the glue calendering direction, and then standing is conducted; the obtained object is placed in a tablet-pressing mold, vulcanization is conducted for 10 min on a plate vulcanizing machine at 15 MPa at 160 DEG C, mold opening is conducted, and vulcanized water swelling hydrolyzed nitrile rubber is taken out, and standing and sample cutting are conducted.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of hydrophilic fiber modified water-absorbing swelling hydrolyzed nitrile rubber. Background technique [0002] Water swelling rubber (WSR), as a new type of functional polymer material, has been widely used in the field of sealing and waterproofing since it came out in the 1970s, and has attracted close attention. The quality of its water control effect is also directly related to the safety of various high-rise buildings, subways, dams, etc. With the rapid development of industrial science and technology, people have higher and higher requirements for water-swellable rubber products. How to develop water-swellable rubber with excellent mechanical properties, fast and high-rate water absorption, and low mass loss rate after water absorption, etc. quickly and easily It has become the hot spot, focus and difficulty in the research of w...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L33/20C08L33/02C08K13/02C08K5/18C08K5/47C08K3/22C08K3/36C08C19/00D06M13/148D06M101/28
CPCC08C19/00C08K2003/2296C08K2201/014C08L15/00C08L2205/03C08L2205/16D06M13/148D06M2101/28C08L33/20C08L33/02C08K13/02C08K5/18C08K5/47C08K3/22C08K3/36
Inventor 杨隽范志玮徐恩松赵启天
Owner WUHAN INSTITUTE OF TECHNOLOGY
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