Method for extruding in-situ grafting modified cellulose through twin screws with ionic liquid serving as solvent

A technology of twin-screw extrusion and twin-screw extruder, which is applied in the production of bulk chemicals, etc., can solve the problems of low dissolution efficiency, limit the application of industrial production, and the solubility of cellulose is only about 5-15%, so as to promote Energy consumption, easy processing and molding, and low energy consumption
CN102964524AInactive Publication Date: 2013-03-13DONGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGHUA UNIV
Publication Date
2013-03-13
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to a method for extruding in-situ grafting modified cellulose through twin screws with ionic liquid serving as a solvent. The method comprises the following steps: (1) drying the cellulose and a grafting monomer in vacuum; (2) uniformly mixing the following raw materials by weight percent: 4 to 8% of cellulose, 30 to 40% of grafting monomer, 51.84 to 65.92% of ionic liquid, 0.04 to 0.08% of initiator, and 0.04 to 0.08% of catalyst; and (3) extruding the mixture by a co-rotating twin-screw extruder, so as to obtain the in-situ grafting modified cellulose. By adopting the method, high flowing property is provided on the basis that the original performances of the cellulose are remained; the cellulose grafting copolymer, which is easily processed and formed, and efficient, green and clean, can be obtained; and the development on novel cellulosic fibers, which are low in energy consumption, economic and feasible and environmentally friendly, can be promoted.
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Description

technical field

[0001] The invention belongs to the method field of modified cellulose, and particularly relates to a method for twin-screw extruding in-situ grafting modified cellulose using ionic liquid as a solvent. Background technique

[0002] Cellulose is one of the most abundant natural polymer materials in the world. It has the advantages of biodegradability and good environmental adaptability. It can neither dissolve in common solvents nor melt at high temperature, which seriously affects the processing performance of cellulose. Researchers from all over the world have used various physical or chemical modification methods on cellulose in order to reduce the polarity of cellulose, thereby improving the processing performance of cellulose and expanding the application field of cellulose.

[0003] There are three main ways to modify cellulose: cellulose crosslinking, cellulose derivatives and cellulose graft copolymerization. Among them, the graft copolymerization o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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