CN110744668A - Preparation method of jatropha curcas base nano paper pulp - Google Patents

Preparation method of jatropha curcas base nano paper pulp Download PDF

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Publication number
CN110744668A
CN110744668A CN201911046760.5A CN201911046760A CN110744668A CN 110744668 A CN110744668 A CN 110744668A CN 201911046760 A CN201911046760 A CN 201911046760A CN 110744668 A CN110744668 A CN 110744668A
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Prior art keywords
slices
preparation
jatropha curcas
enzyme
nano paper
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CN201911046760.5A
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CN110744668B (en
Inventor
曾伟
赵丽娟
易龙飞
宋永娇
高元吉
史英博
张欣汝
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Liangshan Denong Bioenergy Co Ltd
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Liangshan Denong Bioenergy Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/04—Combined bleaching or impregnating and drying of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing

Abstract

The invention discloses a preparation method of jatropha curcas base nano paper pulp, belonging to the technical field of preparation of nano paper. The preparation process comprises the following steps: the preparation process comprises the following steps: (1) slicing the jatropha curcas branches into slices with the thickness of 10-400 microns along the growth direction, and ensuring that each slice contains a wood channel cavity; (2) placing 100 parts of slices in bacteria or enzyme for fermentation, wherein the selected fermentation environment is suitable for the growth environment of corresponding bacteria or the activity environment of enzyme; (3) soaking and bleaching the fermented slices with a sodium hypochlorite solution; (4) and (3) flatly spreading the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 10-15MPa to obtain the transparent nano paper. The method reasonably utilizes a large amount of waste barbadosnut branches every year, and prepares the nano paper in a simple, low-cost and low-energy consumption mode, so that the waste branches are converted into high-added-value nano materials such as flexible organic light-emitting diodes, flexible solar cell substrate materials and the like.

Description

Preparation method of jatropha curcas base nano paper pulp
Technical Field
The invention belongs to the technical field of preparation of nano paper, and particularly relates to a preparation method of jatropha curcas based nano paper pulp.
Background
China is vast in breadth, crop resources are rich, the total planting amount and the total yield of crops are in the forefront of the world, and meanwhile, a large amount of agricultural wastes such as trimmed branches, fallen leaves, crop residues and the like are not reasonably utilized, so that not only is the environment pollution caused, but also huge resource waste is caused. Cellulose and lignin contained in plant cell walls are renewable natural high-molecular compounds with the largest natural reserves, and cellulose nanofilaments obtained by processing cellulose can be used for preparing a film with a three-dimensional network structure, namely nanopaper.
Poplars, tobacco stems, peanut shells, rice stems and the like are common raw materials of cellulose nanofibrils, 200 ten thousand mu of jatropha curcas bases are built by Liangshan de agricultural bioenergy limited companies, jatropha curcas needs to be pruned every year, the yield of pruned branches is about 400 kg/year, and the cellulose nanofibrils obtained by processing the jatropha curcas branches are not reported to be used for preparing nano paper. In addition, the preparation method of the cellulose nanofibrils mainly comprises a high-pressure homogenization method, an ultrasonic preparation method, a grinding method and a micro-jet method at present, wherein the high-pressure homogenization method is the most mainstream preparation method of the cellulose nanofibrils at present due to the advantages of uniform quality, high product yield and the like, but the high-pressure homogenization method also has the defects of machine service life damage, limited production efficiency and high energy consumption. It is very important to provide a method for simply and efficiently preparing the nanofibrils.
Disclosure of Invention
The invention aims to provide a preparation method of jatropha curcas-based nano paper pulp, aiming at the defects of the existing nano paper preparation technology, the method reasonably utilizes a large amount of waste jatropha curcas branches every year, and prepares nano paper in a simple, low-cost and low-energy consumption mode, so that the waste branches are converted into high-added-value nano materials such as flexible organic light-emitting diodes, flexible solar cell substrate materials and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of Jatropha curcas base nano paper pulp comprises the following steps:
(1) slicing the jatropha curcas branches into slices with the thickness of 10-400 microns along the growth direction, and ensuring that each slice contains a wood channel cavity;
(2) placing 100 parts of slices in bacteria or enzyme for fermentation, wherein the selected fermentation environment is suitable for the growth environment of corresponding bacteria or the activity environment of enzyme;
(3) soaking and bleaching the fermented slices with a sodium hypochlorite solution;
(4) and (3) flatly spreading the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 10-15MPa to obtain the transparent nano paper.
In the preparation method of the jatropha curcas-based nano paper pulp, in the step (2), the using amount of the bacteria is 1-10 parts, and the bacteria is one or more of white rot fungi, genetically engineered bacteria, trichoderma reesei, brown rot fungi and soft rot fungi.
In the preparation method of the jatropha curcas-based nano paper pulp, in the step (2), the enzyme is 5-10 parts, and the enzyme is one or more of white rot fungus lignocellulose enzyme, cellulase, xylanase produced by trichoderma reesei, polyphenol oxidase, laccase, hydrogen peroxide generating enzyme and wakeup reductase.
The preparation method of the jatropha curcas base nano paper pulp comprises the step (2), wherein the fermentation days are 15-30 days.
The preparation method of the jatropha curcas base nano paper pulp comprises the step (3), wherein the concentration of a sodium hypochlorite solution for soaking and bleaching is 10-40%, the soaking time is 30-120 minutes, and the temperature is 30-60 ℃.
Compared with the prior art, the invention has the beneficial effects that:
(1) the jatropha curcas-based nano paper is prepared by taking the waste jatropha curcas branches as raw materials, so that the cost is saved, waste is changed into wealth, and environmental pollution and resource waste are reduced.
(2) The preparation process is simple, each plane is guaranteed to contain the wood channel cavity by cutting the branches, the hollow structure of the wood channel cavity can guarantee that the thickness of the thin layer can be greatly reduced in the later compression process, and the cellulose in the plane is oriented along the growth direction, so that the nano paper is endowed with certain strength.
(3) The lignin is removed by adopting a fermentation mode, and the method is simple and environment-friendly.
Detailed Description
The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to the protection scope of the present invention.
It is to be noted that the parts of the materials used in the following examples are all parts by weight.
Example 1
100 parts of jatropha curcas branches are sliced into slices with the thickness of about 10 microns along the growth direction, and the slices are placed in 7 parts of white rot fungi for fermentation for 7 days in an environment with the pH value of 4 and the temperature of 30 ℃. The fermented flakes were then bleached with a sodium hypochlorite solution having a concentration of about 10% for 120 minutes at 60 ℃. And then, flatly paving the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 10MPa to obtain the transparent nano paper.
The transparency of the nano paper is 97% through the test surface, and the tensile strength is 295 MPa.
Example 2
100 parts of jatropha curcas branches are sliced into slices with the thickness of about 100 microns along the growth direction, and the slices are placed into 1 part of white rot fungi for fermentation and fermented for 15 days in an environment with the pH value of 4 and the temperature of 30 ℃. The fermented flakes were then bleached with sodium hypochlorite solution having a concentration of about 20% for 90 minutes at 45 ℃. And then, flatly paving the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 15MPa to obtain the transparent nano paper.
The transparency of the nano paper is 95% through a test surface, and the tensile strength is 310 MPa.
Example 3
100 parts of jatropha curcas branches are sliced into slices with the thickness of about 150 microns along the growth direction, and the slices are placed in 5 parts of trichoderma reesei for fermentation and fermented for 20 days in an environment with the pH of 4.8 and the temperature of 30 ℃. The fermented flakes were then bleached with about 25% sodium hypochlorite solution at 50 ℃ for 90 minutes. And then, flatly paving the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 15MPa to obtain the transparent nano paper.
The transparency of the nanopaper is 94% and the tensile strength is 325MPa on the surface of the nanopaper through testing.
Example 4
100 parts of jatropha curcas branches are sliced into slices with the thickness of about 200 microns along the growth direction, and the slices are placed in 7 parts of white rot fungus lignocellulose enzyme for fermentation for 25 days in an environment with the pH value of 4 and the temperature of 30 ℃. The fermented flakes were then bleached with a sodium hypochlorite solution having a concentration of about 30% for 90 minutes at 50 ℃. And then, flatly paving the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 15MPa to obtain the transparent nano paper.
The transparency of the nano paper is 92% through a test surface, and the tensile strength is 335 MPa.
Example 5
100 parts of jatropha curcas branches are sliced into slices with the thickness of about 300 micrometers along the growth direction, and the slices are placed in 8 parts of xylanase produced by trichoderma reesei for fermentation and are fermented for 30 days in an environment with the pH value of 4.8 and the temperature of 30 ℃. The fermented flakes were then bleached with a sodium hypochlorite solution having a concentration of about 30% for 100 minutes at 50 ℃. And then, flatly paving the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 15MPa to obtain the transparent nano paper.
The transparency of the nano paper is 90% through a test surface, and the tensile strength of the nano paper is 345 MPa.
Example 6
100 parts of jatropha curcas branches are sliced into slices with the thickness of about 400 microns along the growth direction, and the slices are placed into 3 parts of white rot fungi and 2 parts of polyphenol oxidase for fermentation for 25 days in an environment with the pH value of 4 and the temperature of 30 ℃. The fermented flakes were then bleached with a sodium hypochlorite solution having a concentration of about 30% for 100 minutes at 50 ℃. And then, flatly paving the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 15MPa to obtain the transparent nano paper.
The transparency of the nanopaper is 88% through the test surface, and the tensile strength is 355 MPa.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. A preparation method of Jatropha curcas base nano paper pulp is characterized in that the preparation process comprises the following steps:
(1) slicing the jatropha curcas branches into slices with the thickness of 10-400 microns along the growth direction, and ensuring that each slice contains a wood channel cavity;
(2) placing 100 parts of slices in bacteria or enzyme for fermentation, wherein the selected fermentation environment is suitable for the growth environment of corresponding bacteria or the activity environment of enzyme;
(3) soaking and bleaching the fermented slices with a sodium hypochlorite solution;
(4) and (3) flatly spreading the bleached slices, and compressing the slices by adopting a plate press to control the pressure of 10-15MPa to obtain the transparent nano paper.
2. The preparation method of the jatropha curcas based nano pulp according to claim 1, wherein in the step (2), the amount of the bacteria is 1-10 parts, and the bacteria is one or more of white rot fungi, genetically engineered fungi, trichoderma reesei, brown rot fungi and soft rot fungi.
3. The method for preparing the jatropha curcas based nanopaper according to claim 1, wherein in the step (2), the enzyme is used in an amount of 5-10 parts, and the enzyme is one or more of white rot fungus lignocellulose enzyme, cellulase, trichoderma reesei xylanase, polyphenol oxidase, laccase, hydrogen peroxide generating enzyme, and wakefulness reductase.
4. The preparation method of the jatropha curcas based nanopaper according to claim 1, wherein in the step (2), the fermentation days are 15-30 days.
5. The preparation method of the jatropha curcas based nanopaper according to claim 1, wherein in the step (3), the concentration of the sodium hypochlorite solution for soaking and bleaching is 10-40%, the soaking time is 30-120 minutes, and the temperature is 30-60 ℃.
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