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A kind of cellulose thermoplastic material and preparation method thereof

A thermoplastic material and cellulose technology, applied in the field of polymer materials, can solve the problem that pure cellulose cannot be melted and processed, and achieve the effects of stable structure, simple process and widening application fields.

Active Publication Date: 2017-07-11
ZONYA PRINTING & PACKAGING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantage that pure cellulose cannot be melt-processed at present, the present invention provides a melt-processable cellulose thermoplastic material and a preparation method thereof

Method used

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  • A kind of cellulose thermoplastic material and preparation method thereof
  • A kind of cellulose thermoplastic material and preparation method thereof
  • A kind of cellulose thermoplastic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 600 grams of cotton linter pulp and mix and stir with 257 grams, 400 grams, and 600 grams of 1-butyl-3-methylimidazole acetate respectively, so that the ionic liquid is evenly and fully adsorbed. The obtained premix was placed in an internal mixer, and the temperature was raised to 90° C. and stabilized for 10 minutes before mixing at a speed of 45 r / min. After 20 minutes a homogeneous -butyl-3-methylimidazolium acetate-cellulose base was obtained. After crushing the obtained material, put it into an injection molding machine for injection molding. The temperature of the cylinder is 130°C. After the obtained sample is cooled, it is immersed in 20g / 100ml stearic acid ethanol solution for 2 seconds, and baked in an oven at 70°C for 1 hour to obtain the fiber. Injection molded strips of ionic liquid-cellulose thermoplastic materials with element content of 70, 60, 50 wt%.

Embodiment 2

[0023] Mix and stir 80 grams of microcrystalline cellulose and 20 grams of 1-butyl-3-methylimidazolium chloride salt to obtain a muddy premix with uniform appearance. The obtained premix is ​​placed on an open mill, heated to 130° C. and stabilized for 10 minutes before mixing. After 15 minutes, a uniform 1-butyl-3-methylimidazolium chloride-cellulose base material is obtained. The obtained material was put into a mold of 5cm×7cm×0.1cm, placed in a flat vulcanizer, and hot-pressed at 160°C and 20MPa. After taking out and cooling, place in 40g / 100ml stearic acid ethanol solution and dip for 5 seconds, put into 80 ℃ oven and bake for 0.5 hour, obtain the hard sheet of ionic liquid-cellulose thermoplastic material with cellulose content of 80wt%.

Embodiment 3

[0025] The mixture of 600 grams of straw fragments and bagasse and 400 grams of 1-allyl-3-methylimidazolium chloride salt were initially stirred and then put into a high-speed mixer for further mixing to ensure that the ionic liquid was fully and uniformly adsorbed. The obtained premix was placed in an internal mixer, and the temperature was raised to 90° C. and stabilized for 10 minutes before mixing at a speed of 45 r / min. After 20 minutes a homogeneous 1-butyl-3-methylimidazolium chloride-cellulose base was obtained. After crushing the obtained material, add it to the feeding port of the twin-screw extruder with aspect ratio of 35. The temperature of the feeding section, melting section, metering section and machine head of the extruder is 90°C, 135°C, 145°C, 150°C respectively, the screw speed is 30r / min, the cooling medium is air, and the cellulose content is obtained after cutting and granulating A pellet of 60 wt% ionic liquid-cellulose thermoplastic material.

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Abstract

The invention discloses a cellulose thermoplastic material and a preparation method thereof. The thermoplastic material consists of ionic liquid and cellulose, wherein a mass ratio of the ionic liquid to cellulose is 20 / 80-50 / 50, and the ionic liquid serves as a plasticizer and can break hydrogen bonds among cellulose molecules and increase the free volume, so that cellulose plasticization is realized. The preparation method comprises the following steps: premixing, mixing, performing thermal machining and molding, impregnating and roasting. The cellulose thermoplastic material can be repeatedly molded and processed and is resistant to plasticizer migration and stable in structure. Compared with the prior art, the method for preparing the cellulose thermoplastic material, provided by the invention, has the characteristics of simple process and high production efficiency; the product can be subjected to secondary processing, the defect that the conventional cellulose material is single in form is overcome, and the application field of the cellulose material is widened.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a cellulose material and a preparation method thereof, in particular to a thermoplastic processable cellulose material and a preparation method thereof. Background technique [0002] Cellulose is a sugar macromolecule produced by green plants through photosynthesis, which has excellent mechanical properties, biocompatibility, biodegradability and renewability. It is abundant and cheap, and it is one of the most potential substitutes for petroleum-based synthetic polymer materials. The development and utilization of cellulose materials are of great significance to the implementation of national economic development and sustainable development strategies. [0003] Current cellulosic materials are usually prepared by solution processing using special solvents. For example, patents KR20010038732A and CN1358769A respectively disclose the preparation methods of regenerated ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L97/02C08K5/3445B29B7/00B29C45/76B29C47/92B29C43/00B29C48/92
Inventor 解孝林吴俊梁艳艳周兴平廖永贵薛志刚
Owner ZONYA PRINTING & PACKAGING CO LTD
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