Method for preparing cellulose/nanometer titanium dioxide blending material in ionic liquid solvent

A technology of nano-titanium dioxide and ionic liquid solvent, which is applied in the preparation of spinning solution, artificial filament in cellulose solution, wet spinning method, etc., which can solve the lack of adsorption force, difficulty in preparing related materials, interface incompatibility, etc. problems, to avoid pollution, to be beneficial to environmental protection and the health of operators, and to achieve low process energy consumption and operating costs

Inactive Publication Date: 2010-06-09
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difference in the force between inorganic materials and organic polymer molecules, the interface incom

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1 [BMIM]Cl

[0019] A 50ml three-necked bottle containing 20g of [BMIM]Cl ionic liquid was placed in an oil bath at 100°C. After the temperature was stable, 2g of cotton fiber was added to it, and the addition was divided into six times, 1 time per 5min. The dissolving time of cotton fiber in the ionic liquid was 30 min, then 0.05 g of nano-titanium dioxide was added, and the spinning solution was obtained by stirring for 3 h. After the spinning solution is defoamed, it enters a water coagulation bath through a single-hole spinneret, and the temperature of the coagulation bath is room temperature. After 10% plasticizing and stretching, and then washing, bleaching, drying and other processes, a fiber with a strength of 3.2 cN / dtex and an elongation at break of 18.5% was obtained.

Example Embodiment

[0020] Example 2 [BMIM]BF 4

[0021] Will contain 20g [BMIM]BF 4 A 50ml three-necked bottle of ionic liquid was placed in an oil bath at 80°C. After the temperature was stable, 0.5g of cotton fiber was added to it, and the addition was divided into six times, 1 time / 5min. The dissolving time of cotton fiber in the ionic liquid was 30 min, then 0.01 g of nano-titanium dioxide was added, and the spinning solution was obtained by stirring for 3 h. After the spinning solution is defoamed, it enters a 10% ionic liquid aqueous solution coagulation bath through a single-hole spinneret, and the coagulation bath temperature is room temperature. After 15% plasticizing and stretching, and then washing, bleaching, drying and other processes, a fiber with a strength of 2.7 cN / dtex and an elongation at break of 8.5% is obtained.

Example Embodiment

[0022] Example 3 [BMIM]PF 6

[0023] Will contain 20g [BMIM]PF 6 A 50ml three-necked bottle of ionic liquid was placed in an oil bath at 100°C. After the temperature was stable, 3.5g of cotton fiber was added to it, and the addition was divided into six times, 1 time per 5min. The dissolving time of cotton fiber in the ionic liquid was 30 min, then 0.03 g of nano-titanium dioxide was added, and the spinning solution was obtained by stirring for 3 h. After the spinning solution is defoamed, it enters into a coagulation bath of 20% ionic liquid aqueous solution through a single-hole spinneret, and the coagulation bath temperature is 40°C. After 20% plasticizing and stretching, and then washing, bleaching, drying, etc., a fiber with a strength of 2.3 cN / dtex and an elongation at break of 11.5% is obtained.

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Abstract

The invention provides a method for preparing a cellulose/nanometer titanium dioxide blending material in an ionic liquid solvent, wherein a fiber consists of the cellulose and nanometer titanium dioxide particles. The ionic liquid solvent can directly dissolve the cellulose to avoid a complicated process for traditionally dissolving the cellulose; the nanometer titanium dioxide can be added to form uniform and stable spinning solution of cellulose/nanometer titanium dioxide; and the cellulose/nanometer titanium dioxide blending fiber material can be obtained through fiber spinning plasticizing, stretching, washing and drying. The composite material prepared by the method has the advantages of strong intensity, breaking elongation and flexibility, maintains the performance of regenerated cellulose filament, and has the functions of antibacterial activity and ultraviolet absorption. In the composite material prepared by the method, the cellulose is firmly combined with the nanometer titanium dioxide, and the nanometer titanium dioxide is evenly distributed and is difficult to run off. An ionic liquid is used as the solvent to prepare the cellulose composite material, so the method has the advantages of simple and convenient process, recyclable solvent, convenient operation and low cost, and is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to a preparation method of a cellulose / nano-titanium dioxide blend material, which belongs to the field of natural polymer chemistry and also belongs to the field of material science. In particular, it relates to a preparation method of a cellulose / nano titanium dioxide blend material in an ionic liquid solvent system. Background technique [0002] Cellulose is the most abundant renewable resource on earth, and has the advantages of being cheap, degradable and non-polluting to the ecological environment. Converting dissolved cellulose into energy, industrial raw materials, fine chemicals, food, medicine and feed is a better way to utilize cellulose resources and protect the environment. Cellulose is a polymer compound with a linear structure connected by D-glucopyranose groups through 1-4β glycosidic bonds. Its structure is complex, and there are a large number of crystalline regions, amorphous region structures and hydrogen bond...

Claims

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Application Information

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IPC IPC(8): D01F2/02D01D1/02D01D5/06
Inventor 李坤兰杨海静马英冲魏立纲余加祐
Owner DALIAN POLYTECHNIC UNIVERSITY
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