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Method for preparing functional material of regenerated cellulose

A regenerated cellulose and functionalized technology, applied in the field of preparation of functionalized regenerated cellulose materials, can solve the problems of high energy consumption, complex regenerated cellulose material process, serious environmental pollution of viscose process, etc. The effect of easy solvent recovery and high safety

Active Publication Date: 2006-07-05
山东中科恒联生物基材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, the process of preparing regenerated cellulose materials using the traditional viscose method is very complicated, and the viscose process itself is extremely serious in environmental pollution and consumes a lot of energy.
Today, with increasing awareness of environmental protection, this technology is facing great limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 17.0g of dry EMIMCl ionic liquid and 3.0g of dry wood pulp, and stir and mix at 100°C. After about 40 minutes, a clear and transparent brown-yellow solution was formed, which was all black in the field of view observed with a polarizing microscope, indicating that the cellulose was completely dissolved, thereby preparing a cellulose solution with a concentration of 15.0 wt%. After purification, multi-walled carbon nanotubes (MWNTs) were acidified with a certain proportion of concentrated sulfuric acid and concentrated nitric acid at 50° C., and then washed repeatedly with water until the pH value was 6 to obtain acidified multi-walled carbon nanotubes. Add 50 mg of acidified carbon nanotubes into the prepared cellulose solution and mix evenly. After the prepared mixed solution of cellulose and carbon nanotubes is defoamed for 120 minutes, it is added to a small spinning device and spun by dry-jet wet spinning. The diameter of the spinneret hole is 100 μm, the coa...

Embodiment 2

[0028] Weigh 18.5g of NMMO / H 2 O solvent, add 50mg nanometer montmorillonite, and mix with mechanical stirring at 90°C for 120 minutes. Then add 1.5 g of dry cotton pulp, and continue stirring at 90°C. After about 50 minutes, a clear and transparent brown-yellow solution was formed, thereby preparing a cellulose homogeneous solution containing nano-montmorillonite. At this time, after degassing the prepared solution for 120 minutes, evenly spread it in a polytetrafluoroethylene mold, and add water as a coagulation solution. After washing and drying, a regenerated cellulose film containing exfoliated or intercalated nano-montmorillonite can be obtained, which can improve the mechanical properties, thermal stability and barrier properties of the cellulose film. Evaporate most of the water in the coagulation bath to get recovered NMMO / H 2 O solvent.

Embodiment 3

[0030] Weigh 19.0g PMIMCl solvent, add 1.0g dry wood pulp, then add 50mg chitosan fine powder and implement mechanical stirring at 110°C. After about 40 minutes, a clear and transparent brown-yellow solution was formed, thereby preparing a chitosan-containing cellulose homogeneous solution. After the prepared solution was degassed for 120 minutes, it was added to a small spinning equipment and spun by dry jet wet spinning. The diameter of the spinneret hole is 100 μm, the coagulation liquid is water, and the temperature is 25° C. After drawing, washing, drawing and drying, the regenerated cellulose composite fiber with antibacterial properties is obtained. The water in the coagulation bath was evaporated to obtain recovered PMIMCl solvent.

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Abstract

This invention publishes a preparation method for functionalized regenerated cellulose materials. Natural cellulose raw materials are dried and mixed with cellulose solvents, and the mixture is heated and stirred or mechanically kneaded until complete dissolution of cellulose. Functionalized fillers are added into the consequent homogeneous and transparent cellulose solution and stirred. The consequent solution is defoamed in vacuum, regenerated in coagulation bath, washed with water and dried or spun so as to obtain functionalized regenerated cellulose materials.

Description

technical field [0001] The invention relates to a method for preparing functionalized regenerated cellulose materials. Background technique [0002] With the increasing global environmental pollution and the threat to sustainable development caused by the rapid depletion of petroleum energy and natural resources, as well as the improvement of public environmental awareness, the research on polymer materials based on natural renewable resources has been developed rapidly. Cellulose is the most abundant natural polymer on earth. It is both available and renewable, and has the advantages of being cheap, degradable and non-polluting to the ecological environment. At present, cellulose-based materials have been widely used in traditional industries such as plastics, textiles, and papermaking, and have important applications in the fields of food chemicals, daily chemicals, medicine, construction, oilfield chemistry, and biochemistry. It is expected that in the coming days, cellu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K3/36
Inventor 张军张昊武进何嘉松
Owner 山东中科恒联生物基材料有限公司
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