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Preparation method of environmentally-friendly cellulose sponge material

A cellulose sponge, an environmentally friendly technology, applied in the field of cellulose, can solve problems such as low cost, pollute the environment, corrode equipment, etc., and achieve the effect of high water absorption and good mechanical properties

Inactive Publication Date: 2019-12-17
淮安市冰青建设工程管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method pollutes the environment and corrodes equipment, but due to relatively mature technology and low cost, some enterprises are still using it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Cellulose pretreatment: crush the wood pulp board into particles with a particle size of less than 50 microns, put it in an aqueous solution of sodium hydroxide for 2 hours at room temperature, filter, wash the filter cake with water, and then remove the water to obtain the pretreated fiber white;

[0028] 2) Preparation of cellulose solution: Dissolve sodium hydroxide and thiourea in water to obtain sodium hydroxide / thiourea solution (100mL: 2g sodium hydroxide: 2g thiourea), then put the pretreated cellulose into hydrogen Sodium oxide / thiourea solution (the weight percentage of cellulose is 6%), frozen at -5°C for 2h, and then thawed at room temperature to obtain the thawed cellulose solution;

[0029] 3) Preparation of cellulose sponge: Add 40 g of pore-forming agent sodium sulfate (with a particle size less than 5 microns) to 100 g of thawed cellulose solution and stir to obtain a mixed slurry, pour the mixed slurry into a mold for low-temperature molding for 72 ...

Embodiment 2

[0031] 1) Cellulose pretreatment: crush the wood pulp board into particles with a particle size of less than 50 microns, put it in an aqueous solution of sodium hydroxide for 2 hours at room temperature, filter, wash the filter cake with water, and then remove the water to obtain the pretreated fiber white;

[0032] 2) Preparation of cellulose solution: Dissolve sodium hydroxide and thiourea in water to obtain sodium hydroxide / thiourea solution (100mL: 2g sodium hydroxide: 2g thiourea), then put the pretreated cellulose into hydrogen Sodium oxide / thiourea solution (the weight percentage of cellulose is 10%wt), frozen at -5°C for 2h, and then thawed at room temperature to obtain the thawed cellulose solution;

[0033] 3) Preparation of cellulose sponge: add pore-forming agent sodium sulfate (particle size less than 5 microns) to the thawed cellulose solution and stir to obtain a mixed slurry, pour the mixed slurry into a mold for low-temperature molding for 72 hours; low-temper...

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Abstract

The invention belongs to the technical field of celluloses, and particularly relates to a preparation method of an environmentally-friendly cellulose sponge material. The preparation method comprisesthe following steps: 1) preprocessing celluloses; 2) preparing a cellulose solution; and 3) preparing the cellulose sponge material. The cellulose sponge material prepared by the preparation method ofthe environmentally-friendly cellulose sponge material has a low production cost and a low environmental protection pressure, and can replace a cellulose sulfonate method currently adopted by enterprises. The prepared environmentally-friendly cellulose sponge material has good mechanical properties and a high water absorption rate. Low-temperature molding selected in the invention facilitates theformation of a Na2SO4 crystal compound, and the cellulose sponge is slowly molded under a natural condition. The added Na2SO4 can inhibit the activity of hydrogen ions by utilizing the common ion effect of Na2SO4 and sulfuric acid so as to prevent excessive degradation of celluloses. An aqueous NaOH / thiourea solution system selected in the invention has a high dissolving capacity, and the dissolving capacity of the aqueous NaOH / thiourea solution system gradually increases with the reduction of the temperature.

Description

technical field [0001] The invention belongs to the technical field of cellulose, and in particular relates to a preparation method of an environment-friendly cellulose sponge material. Background technique [0002] As a kind of daily necessities and industrial products, foamed plastics have appeared for decades and become an indispensable item in industrial production and people's life. The foam products currently on the market are mainly made of polyurethane and polystyrene derived from petroleum products. It not only pollutes the environment during the production process, but also the waste is difficult to degrade, especially when it is used for human hygiene, household washing and makeup, long-term use will cause certain harm to people. With the continuous reduction of petroleum resources, the source of its raw materials will also be a serious problem. After entering the 21st century, people have a better understanding of environmental protection, and there is bound to...

Claims

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Application Information

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IPC IPC(8): C08J9/26C08L1/02
CPCC08J9/26C08J2201/0444C08J2205/05C08J2301/02
Inventor 刘传礼
Owner 淮安市冰青建设工程管理有限公司
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