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Method for preparing nanocellulose whisker by utilizing abandoned mulberry bark

A technology of nanocellulose and mulberry fiber, which is applied to pulping with inorganic alkali, non-woody plant/crop pulp, pulp bleaching, etc., can solve the problems of high price, limited source, insufficient supply of fiber raw materials, etc., and achieve expansion The range of raw materials, the effect of improving economic income

Inactive Publication Date: 2013-04-10
ZHEJIANG SCI-TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the current shortage of fiber raw materials for preparing nanocellulose whiskers, high prices, and limited sources, and to utilize the discarded mulberry resources in my country to prepare new renewable nanomaterials with high added value, the purpose of the present invention is to provide A method for preparing nano-cellulose whiskers by using waste mulberry bark

Method used

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  • Method for preparing nanocellulose whisker by utilizing abandoned mulberry bark
  • Method for preparing nanocellulose whisker by utilizing abandoned mulberry bark

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Remove the surface green bark from the discarded mulberry bark, wash, dry, pulverize with a plant grinder, and filter through an 80-mesh sieve to obtain mulberry bark powder with a particle size less than or equal to 0.2 mm;

[0022] 2) The mulberry powder obtained in step 1) was mixed with 50°C 8wt% ammonia (NH 3 ·H 2 O) solution in the reaction 150min, mulberry powder and ammonia (NH 3 ·H 2 O) the mass ratio of solution is 1:10, repeats 4 times, washes residual alkali with distilled water in the meantime, obtains mulberry fiber;

[0023] 3) using 3wt% trisodium phosphate chloride (Na 3 PO 4 1 / 4NaOCl) under mechanical agitation, the mulberry fiber obtained in 80 ℃ bleaching treatment step 2) 240min, mulberry fiber and chlorinated trisodium phosphate (Na 3 PO 4 The mass ratio of 1 / 4NaOCl) solution is 1:15, repeats 3 times, washes residual chlorine with distilled water in the meantime, obtains high-purity mulberry fiber;

[0024] 4) the high-purity mulberry fib...

Embodiment 2

[0027] 1) Remove the surface green bark from the discarded mulberry bark, wash, dry, pulverize with a plant grinder, and filter through an 80-mesh sieve to obtain mulberry bark powder with a particle size less than or equal to 0.2 mm;

[0028] 2) The mulberry powder obtained in step 1) was mixed with 10wt% ammonia (NH 3 ·H 2 O) in the solution for 120min, the mulberry powder and ammonia (NH 3 ·H 2 O) the mass ratio of solution is 1:15, repeats 4 times, washes residual alkali with distilled water in the meantime, obtains mulberry fiber;

[0029] 3) using 4wt% trisodium phosphate chloride (Na 3 PO 4 1 / 4NaOCl) solution is under mechanical agitation, 90 ℃ of bleaching treatment step 2) the mulberry fiber that obtains in 210min, mulberry fiber and chlorinated trisodium phosphate (Na 3 PO 4 The mass ratio of 1 / 4NaOCl) solution is 1:20, repeats 3 times, washes residual chlorine with distilled water in the meantime, obtains high-purity mulberry fiber;

[0030] 4) the high-purit...

Embodiment 3

[0033] 1) Remove the surface green bark from the discarded mulberry bark, wash, dry, pulverize with a plant grinder, and filter through an 80-mesh sieve to obtain mulberry bark powder with a particle size less than or equal to 0.2 mm;

[0034] 2) The mulberry powder obtained in step 1) was mixed with 10wt% ammonia (NH 3 ·H 2 O) in the solution for 120min, the mulberry powder and ammonia (NH 3 ·H 2 O) the mass ratio of solution is 1:20, repeats 4 times, washes residual alkali with distilled water in the meantime, obtains mulberry fiber;

[0035] 3) Using 5wt% Trisodium Phosphate Chloride (Na 3 PO 4 1 / 4NaOCl) solution is under mechanical agitation, 90 ℃ of bleaching treatment step 2) the mulberry fiber that obtains in 180min, mulberry fiber and chlorinated trisodium phosphate (Na 3 PO 4 The mass ratio of 1 / 4NaOCl) solution is 1:25, repeats 3 times, washes residual chlorine with distilled water in the meantime, obtains high-purity mulberry fiber;

[0036] 4) the high-purit...

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Abstract

The invention discloses a method for preparing a nanocellulose whisker by utilizing abandoned mulberry bark. The method comprises the following essential steps: carrying out a treatment on the mulberry bark by utilizing an alkali solution containing chlorine so as to purify cellulose; carrying out a catalytic hydrolysis on mulberry bark fibers by utilizing mineral acid; and collecting the nanocellulose whisker of the mulberry bark by utilizing an ultrafiltration membrane. The method is quick and efficient, and is especially suitable for preparation of the nanocellulose whisker taking the mulberry bark as a raw material. According to the invention, the abandoned mulberry bark source is added to the raw material for preparing the nanocellulose whisker, so that the range of the raw material for preparing the nanocellulose whisker is enlarged. Therefore, the limit on the raw material source of the nanocellulose whisker is broken through more quickly. In addition, the innovative idea for utilizing the abandoned mulberry bark source with a high value is put forward. As a result, the economic income of mulberry practitioners in China is improved feasibly. Consequently, the method provided by the invention has an important practical significance.

Description

technical field [0001] The invention relates to a method for preparing nano-cellulose whiskers, in particular to a method for chemically preparing nano-cellulose whiskers by utilizing waste mulberry bark, and belongs to the field of pulp and papermaking engineering. Background technique [0002] Due to the excessive use of non-renewable resources such as oil and natural gas, the shortage of resources has become a major problem facing human society, and the development and utilization of new resources has become a top priority at present. Cellulose is the most abundant natural organic matter in the world, widely exists in natural plants and animal tunics, and is an inexhaustible renewable resource on the earth. [0003] Mulberry has a long history of cultivation in my country. The main purpose of its cultivation is to obtain mulberry leaves for silkworm rearing, while mulberry bark is generally burned as dry firewood, and a few are used as raw materials for papermaking. As a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21C3/02D21C9/12
Inventor 姚菊明费建明张勇李玉峰
Owner ZHEJIANG SCI-TECH UNIV
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