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A method for simultaneously preparing nano-lignin particles and nano-cellulose fibers

A nano-lignin and nano-cellulose technology, which is applied in fiber raw materials, fiber raw material processing, textiles and papermaking, etc., can solve the problems of low utilization efficiency of lignocellulosic raw materials, and achieve the effect of simple and easy process

Active Publication Date: 2022-05-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the above-mentioned prior art, the present invention provides a method for synchronously preparing nano-lignin particles and nano-cellulose fibers from agricultural and forestry biomass raw materials to solve the problem of low utilization efficiency of lignocellulosic raw materials

Method used

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  • A method for simultaneously preparing nano-lignin particles and nano-cellulose fibers
  • A method for simultaneously preparing nano-lignin particles and nano-cellulose fibers
  • A method for simultaneously preparing nano-lignin particles and nano-cellulose fibers

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Effect test

Embodiment 1

[0039] A method for synchronous preparation of nanolignin particles and nanocellulose fibers from wheat straw, comprising the following steps:

[0040] S1: The wheat straw is naturally air-dried and crushed into a long strip of about 3cm; then the crushed wheat straw is added to the ultrasonic auxiliary steam explosion equipment, water vapor is introduced, the pressure in the equipment is adjusted to 2.0MPa, the ultrasonic generator is turned on, the ultrasonic power is controlled by 200W, the frequency is 50Hz, and the duty cycle is 0.5; after 20min of ultrasound, the ultrasonic generator is closed, and the valve is quickly opened to vent pressure and blast, complete the pretreatment of the wheat straw, and obtain the fiber material with loose tissue structure;

[0041] S2: The fiber material and deionized water are mixed according to the mass ratio of 1:50, and then added cetyltrimethylammonium bromide, and the pH of the solution is adjusted to 11 with a mass concentration of 0....

Embodiment 2

[0046] A method for synchronous preparation of nano-lignin particles and nanocellulose fibers from waste wood, comprising the following steps:

[0047] S1: The waste wood is naturally air-dried and crushed into a long strip of about 5cm; then the pulverized waste wood is added to the ultrasonic auxiliary steam explosion equipment, into the water vapor, the pressure in the equipment is adjusted to 2.5MPa, the ultrasonic generator is turned on, the ultrasonic power is controlled by 500W, the frequency is 80Hz, and the duty cycle is 0.2; after 30min of ultrasound, the ultrasonic generator is closed, and the valve is quickly opened to decompress and burst, and the pretreatment of the waste wood is completed to obtain the fiber material with loose tissue structure;

[0048] S2: The fiber material and deionized water are mixed according to the mass ratio of 1:100, and then cetyltrimethylammonium bromide is added, and the pH of the solution is adjusted to 11 with a mass concentration of ...

Embodiment 3

[0053] A method for synchronously preparing nanolignin particles and nanocellulose fibers from bamboo, comprising the following steps:

[0054]S1: The bamboo is naturally air-dried and crushed into a long strip of about 2cm; then the pulverized bamboo is added to the ultrasonic auxiliary steam explosion equipment, water vapor is introduced, the pressure in the equipment is adjusted to 1.8MPa, the ultrasonic generator is opened, the ultrasonic power is controlled for 100W, the frequency is 30Hz, and the duty cycle is 0.8; after 5min of ultrasound, the ultrasonic generator is closed, and the valve is quickly opened to depressurize and burst, and the pretreatment of waste bamboo is completed to obtain fiber materials with loose tissue structure;

[0055] S2: The fiber material and deionized water are mixed according to the mass ratio of 1:20, and then the polyethylene glycol with a molecular weight of about 1000 is added, and the pH value of the solution is adjusted to 9 with a mass ...

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Abstract

The invention discloses a method for synchronously preparing nano lignin particles and nano cellulose fibers from agricultural and forestry biomass raw materials. The method is to pretreat the biomass raw material first, then mix the pretreated raw material with a regulator, and adjust the pH value of the mixture to 9-11, then ball mill the mixture, and then perform ball milling on the ball milled slurry. Centrifuge, and process the precipitate and supernatant after centrifugation respectively to obtain nano-sized cellulose fibers and lignin particles. The method for preparing nano-lignin particles and nano-cellulose fibers provided by the present invention is simple and feasible, environmentally friendly and low-toxic, and nano-biomass products can be obtained synchronously in the same system through simple treatment, which is useful for new material research and industrial production. Important technical reference significance.

Description

Technical field [0001] The present invention belongs to the field of separation and extraction technology of natural polymer materials, specifically relates to a method for synchronously preparing nanolignin particles and nanocellulose fibers from agricultural and forestry biomass raw materials. Background [0002] The depletion of fossil resources and the difficulty of degradation of artificial polymer materials bring increasingly serious resource and environmental problems, synthetic materials incomplete degradation of microplastics formed with the biological metabolism cycle into the human body, causing potential health threats, looking for fully degradable green materials to replace the traditional synthetic polymers has become a hot topic of research, of which biomass-based natural polymers are regarded as the ideal substitute for synthetic polymers. [0003] Wood fiber raw materials are the richest and cheapest renewable resources on the planet. The world produces up to 100...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/30D21B1/36D21C3/04D21C5/00
CPCD21B1/36D21B1/303D21B1/30D21C3/04D21C5/00
Inventor 姜曼胡翔洲陆远王峰潘宇
Owner SOUTHWEST JIAOTONG UNIV
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