A kind of preparation method of short process jute cellulose

A technology of jute fiber and cellulose, which is applied in the fields of pulping of cellulose raw materials, treatment of cellulose with microorganisms/enzymes, and treatment of fiber raw materials. There are many drying steps to achieve the effect of no damage to the structure and performance of cellulose, stable process parameters and easy control, and fewer drying steps

Inactive Publication Date: 2016-06-01
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Currently, the methods for producing cellulose mainly include chemical methods, physical methods, biological methods, or a combination of several methods, but all of them have the following defects: such as the production process Long, many drying steps, high energy consumption, and high-concentration acid and alkali have a great impact on the degree of polymerization and structure of cellulose under high temperature conditions, thus affecting the application performance of cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A kind of preparation method of short process jute cellulose of the present embodiment, comprises the steps:

[0068] (1) Fiber pretreatment: cut the retting and beating jute fibers into 20-40cm long, and then open them.

[0069] In the present embodiment, the jute fiber selects the tip of the jute fiber, retting and knocking before cutting, then the jute fiber is cut into 20-40cm long, and it is opened.

[0070] Retting and beating: jute fiber is the bast peeled off from the hemp stalk. After retting and beating, it will form a bundle of fibers, and its length can reach more than 100cm.

[0071] Cutting: Through cutting, on the one hand, the three parts of the root, middle and tip of jute are separated (because the impurities contained in the three parts of the root, the middle and the middle are different due to different growth times, so the three parts are treated separately to improve the processing efficiency. Uniformity, and can save cost), on the other hand jut...

Embodiment 2

[0082] A kind of preparation method of short process jute cellulose of the present embodiment, comprises the steps:

[0083] (1) Fiber pretreatment:

[0084] The retted, beaten middle jute fibers are cut into 20-40 cm lengths and opened.

[0085] (2) Alkali treatment:

[0086] Add the pretreated jute fiber to the alkali treatment solution, adjust the bath ratio to 1:15, raise the temperature to 80°C at 2°C / min, keep it warm for 90min, wash with water, pickle until neutral, wash with water, and dehydrate.

[0087] The alkali treatment solution includes the following composition: 10g / L sodium hydroxide, 6g / L sodium sulfite, 2g / L penetrant JFC, and the balance is water.

[0088] (3) Acid treatment:

[0089] Add the alkali-treated jute fiber into sulfuric acid, adjust the bath ratio to 1:15, and the sulfuric acid dosage to 6g / L, raise the temperature to 60°C at 2°C / min, keep it warm for 60min, wash with water, neutralize with lye, wash with water, and dehydrate .

[0090] (4)...

Embodiment 3

[0094] A kind of preparation method of short process jute cellulose of the present embodiment, comprises the steps:

[0095] (1) Fiber pretreatment

[0096] The retted, beaten root jute fibers are cut into 20-30 cm lengths and opened loose.

[0097] (2) Alkali treatment:

[0098] Add the pretreated jute fiber to the alkali treatment solution, adjust the bath ratio to 1:20, raise the temperature to 80°C at 1.5°C / min, keep it warm for 120min, wash with water, pickle until neutral, wash with water, and dehydrate.

[0099] The alkali treatment solution includes the following composition: 20g / L sodium hydroxide, 8g / L sodium sulfite, 3g / L penetrant JFC, and the balance is water.

[0100] (3) acid treatment:

[0101] Add the alkali-treated jute fiber into sulfuric acid, adjust the bath ratio to 1:20, and the sulfuric acid dosage to 8g / L, raise the temperature to 60°C at 1.5°C / min, keep it warm for 90min, wash with water, neutralize with lye, wash with water, and dehydrate .

[0...

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Abstract

The invention discloses a short-process preparation method of bastose. The short-process preparation method is characterized by comprising the following steps of fiber pretreatment; alkali treatment; acid treatment; bio-enzyme treatment; drying; and bastose obtaining. The short-process preparation method is short in process flows, few in drying steps as well as low in time and energy consumption; and the used additives are environment-friendly additives and are low in dosage. By using the short-process preparation method disclosed by the invention, the lignin and hemicellulose removal effect is good, the content of alpha-cellulose in the prepared bastose is high, the polymerization degree of the bastose is easily controlled, and the structure and performance of the bastose are not remarkably influenced.

Description

Technical field: [0001] The invention relates to a method for preparing cellulose, in particular to a method for preparing short-process jute cellulose. Background technique: [0002] Cellulose is the most abundant natural polymer material in nature, and has been widely used in pulp and paper, recycled textile fibers, cellulose derivatives, food, medicine and other industrial fields. In recent years, with the increasing scarcity of petrochemical resources and the growing global energy crisis, renewable biomass resources have become a research hotspot for many scholars. Cellulose has become an important biomass for clean energy research due to its rich resources and non-toxicity. can one. [0003] Although cellulose widely exists in plants, the main sources of plant cellulose so far are limited to wood and cotton, which have high cellulose content and relatively simple structural composition. As we all know, the growth cycle of wood is long, and a large number of felling wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/02D21C3/04D21C5/00
CPCD21C3/022D21C3/04D21C5/005
Inventor 王维明周康江维琼刘梦婷徐磊
Owner SHAOXING UNIVERSITY
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