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Method for modifying natural fibers for anion polymer nylon 6 reaction

An anionic polymerization and natural fiber technology, applied in fiber treatment, plant fiber, dry-cleaning fiber products, etc., can solve problems such as hindering polymerization, and achieve the effects of reducing impact, improving strength, and increasing cellulose components

Inactive Publication Date: 2015-01-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, direct use of commercialized natural fibers and anionically polymerized nylon 6 for reaction processing will seriously hinder polymerization

Method used

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  • Method for modifying natural fibers for anion polymer nylon 6 reaction
  • Method for modifying natural fibers for anion polymer nylon 6 reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 50g ramie fiber fabric is selected, and the structural parameters are 21s×21s, 52×36. Firstly, it is pretreated to remove impurities such as colloid, grease, polyvinyl alcohol, and ash contained therein. Dissolve sodium hydroxide, sodium dodecylbenzenesulfonate and sodium carbonate in deionized water at 2g / L, 3% and 2% respectively and stir evenly, then add natural fiber at a weight ratio of 1:50, heat up To 95 ℃, under stirring for 4h;

[0035] Then, the cleaned natural fibers were first dried in a blast drying oven at 60°C for 8 hours, and finally dried in a freeze dryer at a temperature of -45°C and a vacuum of 9Pa for 24 hours.

Embodiment 2

[0037] Select 20g ramie fiber bundles for use and cut into short fibers. It is cleaned by placing it in a specially configured solution consisting of deionized water, sodium dodecylbenzenesulfonate (3%) and sodium carbonate (2%), and then adding it in a weight ratio of 1:50 For natural fibers, heat up to 40 °C and process for 5 hours under stirring;

[0038] Then, the cleaned natural fibers were first dried in a blast drying oven at 60°C for 8 hours, and finally dried in a freeze dryer at a temperature of -45°C and a vacuum of 9Pa for 24 hours.

Embodiment 3

[0040] The fibers initially modified in Example 1 were placed in a coupling agent solution of a specific concentration for further modification, the water / ethanol volume ratio was 1:3, the dilution concentration of the coupling agent was 0.1%, and the dosage of the silane coupling agent was: 2wt%; slowly add ammonia water with a concentration of 5%, and adjust the pH value to between 8 and 10; add 50g of natural fiber fabric, after ultrasonic treatment for 1h, transfer to 80°C oil bath for reflux reaction for 6hr, and pass N2 gas protection; after the reaction, take out the fiber and wash it with 85% ethanol solution to remove the unreacted KH550; put the washed natural fiber in a blast drying oven at 60°C for 6-8 hours, and then put it in Dry for 24 hours in a freeze dryer with a temperature of -45°C and a vacuum of 9 Pa.

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Abstract

The invention discloses a method for modifying natural fibers for anion polymer nylon 6 reaction, in particular relates to a method for primarily modifying the natural fibers in a specific solution and removing impurities which are attached on the surface of the natural fiber and can produce adverse effect on the anion polymerization process. In order to further improve the reaction processing process, the primarily modified natural fibers are modified in a specific coupling agent solution, so that the surface of the natural fiber is coated by a given coupling agent molecular layer, and the coupling agent molecular layer can play a role in shielding active groups, and also can play a role in facilitating interface interaction between the fiber and a polymer substrate. The modified natural fibers successfully react with anion polymer nylon 6, so that a novel natural fiber composite material is produced, and the natural fibers can be widely used in the field of a macromolecular material; meanwhile, the utilization rate of the natural fibers also can be increased, and the development of the natural fiber industry in China can be promoted.

Description

technical field [0001] The invention belongs to the technical field of new polymer materials, and in particular relates to a method for modifying natural fibers used for anionic polymerization nylon 6 reaction processing. Background technique [0002] Environmental degradation, lack of resources and energy crisis have made mankind realize the importance and urgency of protecting the environment and effectively utilizing resources to achieve sustainable social and economic development. Composite materials occupy a place in the field of material science with irreplaceable advantages such as high strength and energy saving, but the waste, recycling and regeneration of many composite materials have brought increasingly serious environmental problems. With the enhancement of people's awareness of environmental protection, the application of renewable, sustainable utilization and degradable biomaterials has attracted much attention and attention. Natural fiber, as an environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/50D06L1/12D06B15/00C08L77/02C08L1/02D06M101/06
Inventor 杨鸣波阚泽刘正英杨伟
Owner SICHUAN UNIV
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