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Preparation method of Jatropha curcas branch based nanometer paper pulp

A jatropha and nanotechnology, applied in the field of preparation of jatropha-based nano pulp, can solve the problems of limited production efficiency, damage to machine life, high energy consumption, etc., and achieve the effects of reduced thin layer thickness, cost saving, and simple preparation process

Active Publication Date: 2020-02-04
凉山德农生物能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Poplars, tobacco stems, peanut shells, and rice straws are common raw materials for cellulose nanofibrils. Liangshan Denong Bioenergy Co., Ltd. has built a jatropha base of 2 million mu. Jatropha needs to be pruned every year. The pruned branches The output is about 400 kg / year, and the processing of Jatropha branches to obtain cellulose nanofibrils for the preparation of nanopaper has not been reported
In addition, the preparation methods of cellulose nanofibrils mainly include high-pressure homogenization method, ultrasonic preparation, grinding method and micro-fluidization method. Among them, the high-pressure homogenization method has become the current cellulose nanofibril method due to its advantages of uniform quality and high product yield. The most mainstream preparation method for filaments, but the high-pressure homogenization method also has the disadvantages of damaging machine life, limited production efficiency and high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 100 parts of Jatropha jatropha branches and slice them into thin slices with a thickness of about 10 microns along the growth direction, place them in 7 parts of white rot fungi for fermentation, and ferment for 7 days in an environment with a pH of 4 and 30°C. The fermented flakes were then bleached with a sodium hypochlorite solution with a concentration of about 10% at 60° C. for 120 minutes. Then the bleached flakes were flattened, and then compressed using a press machine to control the pressure of 10 MPa to obtain transparent nano paper.

[0023] The transparency of the nano paper is 97% and the tensile strength is 295MPa by testing the surface.

Embodiment 2

[0025] Take 100 parts of Jatropha jatropha branches and slice them into thin slices with a thickness of about 100 microns along the growth direction, place them in 1 part of white rot fungus for fermentation, and ferment for 15 days in an environment with a pH of 4 and 30°C. The fermented flakes were then bleached with a sodium hypochlorite solution at a concentration of about 20% at 45° C. for 90 minutes. Then the bleached flakes were flattened, and then compressed using a press machine to control the pressure of 15 MPa to obtain transparent nano paper.

[0026] Through the surface test, the transparency of the nano paper is 95%, and the tensile strength is 310MPa.

Embodiment 3

[0028] Take 100 parts of Jatropha jatropha branches and slice them into thin slices with a thickness of about 150 microns along the growth direction, place them in 5 parts of Trichoderma reesei for fermentation, and ferment for 20 days in an environment of 30°C with a pH of 4.8. The fermented flakes were then bleached with a sodium hypochlorite solution with a concentration of about 25% at 50° C. for 90 minutes. Then the bleached flakes were flattened, and then compressed using a press machine to control the pressure of 15 MPa to obtain transparent nano paper.

[0029] The transparency of the nano paper is 94% and the tensile strength is 325MPa by testing the surface.

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Abstract

The invention discloses a preparation method of Jatropha curcas branch based nanometer paper pulp, and belongs to the technical field of nanometer paper preparation. The preparation process includes the following steps that firstly, Jatropha curcas branches are cut into slices with the thickness being 10-400 micrometers in the growth direction, and it is ensured that wood passageway cavities are contained in each slice; secondly, 100 slices are placed in bacteria or enzymes to ferment, and the selected and used fermentation environment should adapt to the growth environment of the corresponding bacteria or the activity environment suitable for the enzymes; thirdly, the slices subjected to fermentation are soaked and bleached through a sodium hypochlorite solution; and fourthly, the bleached slices are laid flatwise and are compressed through the pressure, being 10-15 MPa, controlled through a plate pressing machine, and transparent nanometer paper is obtained. By means of the method, alarge number of abandoned Jatropha curcas branches in each year are reasonably utilized, the nanometer paper is prepared in a simple, low-cost and low-energy-consumption manner, and the abandoned branches are converted into high value-added nanometer materials such as flexible organic light-emitting diodes and flexible solar cell substrate materials.

Description

technical field [0001] The invention belongs to the technical field of nano paper preparation, and in particular relates to a preparation method of jatropha-based nano paper pulp. Background technique [0002] my country has a vast territory and abundant crop resources. The total planting volume and total output of crops are among the top in the world. At the same time, it also has a large amount of agricultural waste. These agricultural wastes, such as pruned branches, fallen leaves, and crop residues, cannot be rationally utilized. It will not only cause environmental pollution, but also a huge waste of resources. The cellulose and lignin contained in the plant cell wall are renewable natural polymer compounds with the largest reserves in nature. The cellulose nanofibrils obtained by processing cellulose can prepare a film with a three-dimensional network structure, that is, nanopaper , Cellulose nanopaper has the advantages of high strength, high transparency, high barrie...

Claims

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Application Information

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IPC IPC(8): B27N1/00B27N3/08B27L5/00B27K5/00B27K5/04
CPCB27K5/00B27K5/04B27L5/00B27N1/00B27N3/08
Inventor 曾伟赵丽娟易龙飞宋永娇高元吉史英博张欣汝
Owner 凉山德农生物能源股份有限公司