Method for regulating thermoplasticity and toughness of redox-modified plant fiber and application of redox-modified plant fiber

A plant fiber, oxidation modification technology, applied in plant fiber, fiber treatment, fiber raw materials, etc., can solve the problems of high processing temperature, poor toughness, narrow processing temperature window, etc., to improve thermoplasticity and toughness, and good processing fluidity , low-cost effect

Inactive Publication Date: 2019-05-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the processing temperature of this method is still high, the processing temperature window is still narrow, and the rigidity of the prepared plant fiber material is strong, but the toughness is poor

Method used

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  • Method for regulating thermoplasticity and toughness of redox-modified plant fiber and application of redox-modified plant fiber
  • Method for regulating thermoplasticity and toughness of redox-modified plant fiber and application of redox-modified plant fiber
  • Method for regulating thermoplasticity and toughness of redox-modified plant fiber and application of redox-modified plant fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for regulating the thermoplasticity and toughness of redox modified plant fibers and a method for preparing materials, the specific steps are as follows:

[0041] (1) The sisal fiber is cut to 5 to 10 mm by a fiber cutter.

[0042] (2) Add sodium periodate and the cut sisal fiber described in step (1) in the aqueous solution at a weight ratio of 2:1, and configure a suspension with a sodium periodate concentration of 20g / L. Then, it was stirred and reacted at 60° C. in the dark for 4 hours, filtered and washed to obtain oxidatively modified sisal fibers.

[0043] (3) Sodium borohydride and the oxidation-modified sisal fiber described in step (2) are added into the aqueous solution at a weight ratio of 0.5:1, and configured into a suspension with a sodium borohydride concentration of 5 g / L. Stir the reaction at room temperature for 4 hours, filter and wash to obtain redox-modified sisal fiber.

[0044] (4) Glycerin is mixed with the oxidation-reduction modifie...

Embodiment 2

[0048] A method for regulating the thermoplasticity and toughness of redox modified plant fibers and a method for preparing materials, the specific steps are as follows:

[0049] (1) Cut the sisal fiber to 5-10 mm by a fiber cutting machine, and perform steam explosion pretreatment.

[0050] (2) the sisal fiber after the steam explosion pretreatment described in sodium periodate and step (1) is added in the aqueous solution with the weight ratio of 2:1, is configured into the suspension that sodium periodate concentration is 20g / L . Then, it was stirred and reacted at 60° C. in the dark for 4 hours, filtered and washed to obtain oxidation-modified steam-exploded sisal fibers.

[0051] (3) Sodium borohydride and the oxidation-modified steam-exploded sisal fiber described in step (2) were added into the aqueous solution in a weight ratio of 0.5:1, and a suspension with a sodium borohydride concentration of 5 g / L was configured. Stir the reaction at room temperature for 4 hours...

Embodiment 3

[0056] A method for regulating the thermoplasticity and toughness of redox modified plant fibers and a method for preparing materials, the specific steps are as follows:

[0057] (1) Cut the sisal fiber to 5-10 mm by a fiber cutting machine, and perform steam explosion pretreatment.

[0058] (2) the sisal fiber after the steam explosion pretreatment described in sodium periodate and step (1) is added in the aqueous solution with the weight ratio of 2:1, is configured into the suspension that sodium periodate concentration is 20g / L . Then, it was stirred and reacted at 60° C. in the dark for 4 hours, filtered and washed to obtain oxidation-modified steam-exploded sisal fibers.

[0059] (3) Sodium borohydride and the oxidation-modified steam-exploded sisal fiber described in step (2) were added into the aqueous solution in a weight ratio of 0.5:1, and a suspension with a sodium borohydride concentration of 5 g / L was configured. Stir the reaction at room temperature for 4 hours...

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Abstract

The invention relates to a method for regulating the thermoplasticity and toughness of redox-modified plant fiber. The method comprises the following steps: (1) performing pretreatment on plant fiber;(2) adding an oxidizing agent solution for a reaction, performing filtration and washing so as to obtain oxidization-modified plant fiber, adding a reducing agent solution for a reaction, and performing filtration and washing so as to obtain redox-modified plant fiber; and (3) adding a plasticizer, and mixing the plasticizer with the redox-modified plant fiber uniformly, wherein the plasticizer is a hydroxy plasticizer, an ionic liquid plasticizer, an eutectic solvent plasticizer, an ester plasticizer, an amine plasticizer, a glycidyl ether plasticizer or an inorganic salt plasticizer. Through the method, the flexibility of the redox-modified plant fiber material can be improved, the processing temperature of the plant fiber material can be reduced, and the processing window of the plantfiber material can be widened.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, in particular to a method for regulating the thermoplasticity and toughness of redox modified plant fibers and its application. Background technique [0002] Since the 20th century, the production of a large number of petroleum-based polymer materials has caused a shortage of petroleum resources and serious environmental pollution. Preparation of green polymer materials with excellent performance by using abundant reserves, wide sources, and biodegradable plant fiber raw materials to partially replace petroleum-based polymers will effectively solve the current increasingly serious resource and environmental problems. [0003] In the long-term evolution, the three components of plant fibers are interwoven into a complex and dense micro-nano composite structure. This complex mechanism makes it impossible to melt process at high temperatures, because the three major components have already ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K5/053C08K5/19C08K5/3445D06M11/30D06M11/80D06M101/06
CPCC08J3/18C08J2397/02Y02P20/54D21B1/021
Inventor 冯彦洪程航雷波邹新良
Owner SOUTH CHINA UNIV OF TECH
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