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Method for preparing lignin-rich fiber for textile and composite materials through high-temperature directional degumming

A technology of lignin fibers and composite materials, which is applied in the field of high-temperature directional degumming to prepare lignin-rich fibers for textiles and composite materials. It can solve the problems of fiber disintegration and inability to achieve directional degumming, and achieve high bending strength.

Active Publication Date: 2019-08-02
GUANGDONG GUANHAO HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the lye penetrates more seriously in the radial direction of the fiber, which is easy to cause the disintegration of the fiber, and the goal of directional degumming cannot be achieved.

Method used

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  • Method for preparing lignin-rich fiber for textile and composite materials through high-temperature directional degumming
  • Method for preparing lignin-rich fiber for textile and composite materials through high-temperature directional degumming
  • Method for preparing lignin-rich fiber for textile and composite materials through high-temperature directional degumming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve sodium hydroxide in a certain amount of glycerin to form an alkali solution with a concentration of 8wt%. After soaking 10Kg of cotton stalk fiber in 40Kg of the above-mentioned alkali solution for 1min, centrifuge at 800r / min for about 2min to control the alkali solution and cotton The mass ratio of stalk bark fiber is 2:1. Heated under 400W power for 30s, washed with 4% NaOH aqueous solution and water successively at room temperature. After freeze-drying, it is carded on a roller carding machine to form cotton stalk skin fibers with a fineness of 22 dtex and a strength of 3.2 cN / dtex. The properties of the yarns and composite materials developed with the above-mentioned cotton stalk fiber are shown in Table 1. It can be seen from Table 1 that the strength of the yarn obtained by blending cotton stalk fiber and cotton after high-temperature directional degumming is 120% higher than that obtained by high-temperature alkali-boiled straw fiber. The composite ma...

Embodiment 2

[0043] Dissolve sodium hydroxide in a certain amount of glycerin to form an alkali solution with a concentration of 8wt%. After soaking 10Kg of cotton stalk fiber in 40Kg of the above-mentioned alkali solution for 1min, centrifuge at 800r / min for about 2min to control the alkali solution and cotton The mass ratio of stalk bark fiber is 2:1. Heated at 240W for 50S, washed with 4% NaOH and water at room temperature. After freeze-drying, it is carded on a roller carding machine to form cotton stalk skin fibers with a fineness of 23 dtex and a strength of 3.1 cN / dtex. The properties of the yarns and composite materials developed with the above-mentioned cotton stalk fiber are shown in Table 2. It can be seen from Table 2 that the strength of the blended yarn obtained by blending cotton stalk sheath fibers after high-temperature directional degumming with cotton is 100% higher than that of cotton stalk sheath fibers after high-temperature alkali boiling. The cotton stalk skin fib...

Embodiment 3

[0048] Dissolve sodium hydroxide in a certain amount of glycerin to form an alkali solution with a concentration of 8wt%. After soaking 10Kg of cotton stalk fiber in 40Kg of the above-mentioned alkali solution for 1min, centrifuge at 800r / min for about 2min to control the alkali solution and cotton The mass ratio of stalk bark fiber is 2:1. Heat it for about 5 minutes under 80W power, and wash it with 4% NaOH and water at room temperature. After freeze-drying, it is carded on a roller carding machine to form cotton stalk skin fibers with a fineness of 23 dtex and a strength of 3.0 cN / dtex. The properties of the yarns and composite materials developed with the above-mentioned cotton stalk fiber are shown in Table 3. It can be seen from Table 3 that the strength of the blended yarn obtained by blending the cotton stalk fiber and cotton after high-temperature directional degumming is 130% higher than that of the blended yarn obtained by high-temperature alkali boiling. The comp...

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Abstract

The invention provides a high temperature oriented degumming method for preparing a lignin-rich fiber used for textiles and composite materials. The high temperature oriented degumming method comprises the following steps: preparing an alkali / alcohol degumming reagent, a lignin-rich fiber alkali soaking, a centrifugal control fiber band liquid measurement, microwave heating degumming, cleaning, drying and carding so as to obtain the lignin-rich fiber used for textiles and composite materials with the fineness of smaller than 24 dtex and the strength of higher than 3.0 cN / dtex. The strength ofa cotton / lignin-rich fiber blended yarn prepared from the lignin-rich fiber is higher by 100% compared with that of a blended yarn prepared from the lignin-rich fiber after conventional alkali degumming. The tensile breaking strength of the composite material prepared from the lignin-rich fiber is higher by more than 50% compared with a composite material prepared from the lignin-rich fiber afteralkali degumming, and the bending strength is higher by more 80%.

Description

technical field [0001] The invention belongs to the technical field of processing fiber raw materials for textile or reinforced composite materials, and in particular relates to a method for preparing lignin-rich fibers for textile and composite materials through high-temperature directional degumming. Background technique [0002] The sustainable development of the textile industry has attracted more and more researchers to extract natural fibers for textiles from agricultural by-products. At present, the global textile fiber consumption has reached 100 million tons, but the continuous growth of fiber supply is facing various problems. First, synthetic fibers, which account for 67% of fiber consumption, come from non-renewable petroleum resources, and these synthetic fibers are difficult to degrade under normal conditions; In recent years, it has been gradually declining. The waste of crop straw is one of the most important cellulose resources in the world. Its main compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/00
CPCD01C1/00
Inventor 董震潘刚伟丁志荣黄香玉
Owner GUANGDONG GUANHAO HIGH TECH