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Method for chemically preparing nano microcrystalline cellulose by utilizing moso bamboo

A technology of nanometer microcrystalline and bamboo fiber, which is applied in the field of pulp and paper engineering, can solve the problems of long growth cycle, insufficient supply of fiber raw materials, high price, etc., and achieve the effect of increasing economic income.

Inactive Publication Date: 2014-05-28
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems of insufficient supply of fiber raw materials for preparing nano-microcrystalline cellulose, high price, long growth cycle, etc., and resource utilization of my country's rich moso bamboo resources at the same time, to prepare high value-added renewable nano-materials, the purpose of the present invention It is to provide a method for chemically preparing nano-microcrystalline cellulose by using moso bamboo

Method used

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  • Method for chemically preparing nano microcrystalline cellulose by utilizing moso bamboo
  • Method for chemically preparing nano microcrystalline cellulose by utilizing moso bamboo
  • Method for chemically preparing nano microcrystalline cellulose by utilizing moso bamboo

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Deleafing, washing and drying the moso bamboo, crushing it with a plant grinder, and filtering it through a 100-mesh sieve to obtain moso bamboo powder with a particle size less than or equal to 0.15mm;

[0022] 2) Place the moso bamboo powder obtained in step 1) at 80°C with 4.0wt% Mg(OH) under the action of mechanical stirring 2 Reaction in the solution for 100min, moso bamboo powder and Mg(OH) 2 The solution mass ratio is 1:5, repeated 3 times, during which the residual alkali is washed with distilled water to obtain moso bamboo fiber;

[0023] 3) Using 1.5wt%Ca(ClO) 2 Under the action of mechanical stirring, the bamboo fiber obtained in step 2) was bleached at 80°C for 210 minutes, and the bamboo fiber and Ca(ClO) 2 The mass ratio of solution is 1:10, repeats 4 times, washes residual chlorine with distilled water in the meantime, obtains high-purity moso bamboo fiber;

[0024] 4) The high-purity moso bamboo fiber obtained in step 3) was placed in a 30wt% trich...

Embodiment 2

[0027] 1) Deleafing, washing and drying the moso bamboo, crushing it with a plant grinder, and filtering it through a 100-mesh sieve to obtain moso bamboo powder with a particle size less than or equal to 0.15mm;

[0028] 2) Place the moso bamboo powder obtained in step 1) at 90°C with 4.0wt% Mg(OH) under the action of mechanical stirring 2 Reaction in the solution for 90min, moso bamboo powder and Mg(OH) 2 The solution mass ratio is 1:10, repeated 3 times, during which the residual alkali is washed with distilled water to obtain moso bamboo fiber;

[0029] 3) Using 2.0wt%Ca(ClO) 2 Under the action of mechanical stirring, the bamboo fiber obtained in step 2) was bleached at 80°C for 180 minutes, and the bamboo fiber and Ca(ClO) 2 The mass ratio of solution is 1:20, repeats 4 times, washes residual chlorine with distilled water in the meantime, obtains high-purity moso bamboo fiber;

[0030] 4) The high-purity moso bamboo fiber obtained in step 3) was placed in a 50wt% benze...

Embodiment 3

[0033]1) Deleafing, washing and drying the moso bamboo, crushing it with a plant grinder, and filtering it through a 100-mesh sieve to obtain moso bamboo powder with a particle size less than or equal to 0.15mm;

[0034] 2) Place the moso bamboo powder obtained in step 1) at 70°C with 6.0wt% Mg(OH) under the action of mechanical stirring 2 Reaction in the solution for 120min, moso bamboo powder and Mg(OH) 2 The solution mass ratio is 1:10, repeated 3 times, during which the residual alkali is washed with distilled water to obtain moso bamboo fiber;

[0035] 3) Using 3.0wt%Ca(ClO) 2 Under the action of mechanical stirring, the bamboo fiber obtained in step 2) was bleached at 60°C for 150 minutes, and the bamboo fiber and Ca(ClO) 2 The mass ratio of solution is 1:20, repeats 4 times, washes residual chlorine with distilled water in the meantime, obtains high-purity moso bamboo fiber;

[0036] 4) The high-purity moso bamboo fiber obtained in step 3) was reacted in a mixed solu...

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Abstract

The invention discloses a method for chemically preparing nano microcrystalline cellulose by utilizing moso bamboo. The adopted method has key points that the moso bamboo is respectively subjected to alkali solution treatment and chlorine-containing solution treatment to purify cellulose, moso bamboo fibers are catalyzed and hydrolyzed by adopting an organic acid and a moso bamboo nano microcrystalline cellulose product is collected by virtue of an ultrafiltration membrane. The method disclosed by the invention is rapid and efficient and is especially applicable to preparation of nano microcrystalline cellulose by adopting the moso bamboo raw material. According to the method disclosed by the invention, a moso bamboo resource is introduced into a fiber raw material used for preparing the nano microcrystalline cellulose, the range of the raw material used for preparing the nano microcrystalline cellulose is expanded, rapid break-through of limitation of source of the raw material of the nano microcrystalline cellulose can be facilitated, and an innovative thinking is provided for high-valued utilization of the moso bamboo resource, so that economic income of peasant in bamboo regions in China can be reliably increased, and the method disclosed by the invention has practical significance.

Description

technical field [0001] The invention relates to a method for preparing nano-microcrystalline cellulose, in particular to a method for chemically preparing nano-microcrystalline cellulose by using moso bamboo, and belongs to the field of pulp and papermaking engineering. Background technique [0002] Cellulose is the most abundant natural macromolecular compound on the earth, which is composed of a single D-glucose unit connected in a chain by β-1,4-glycosidic bonds. Nano-microcrystalline cellulose is a solid product with a limit degree of polymerization with nanoscale and excellent performance obtained from natural cellulose through microcrystallization. Nanocrystalline cellulose not only has the basic structure and properties of ordinary cellulose, but also has the characteristics of nanoparticles, such as huge specific surface area, high Young's modulus, super adsorption capacity and sensitive reactivity. It is quite different from ordinary cellulose. Compared with ordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B15/08
Inventor 张勇姚菊明卢潇冰马兰
Owner ZHEJIANG SCI-TECH UNIV
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