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Cellulose-graft-polyisoprene copolymer and preparation method thereof

A technology of polyisoprene and isoprene, which is applied in the field of bionic materials, can solve problems such as microstructure and mechanical properties of the skin, and achieve excellent biocompatibility and wide application prospects

Inactive Publication Date: 2015-07-08
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing biomaterials that have been disclosed for artificial skin include: chitin, sodium hyaluronate, nano-chitosan, etc., and the skin bionic material prepared by using this material has properties close to the skin, such as maintaining the moisture content of the body , protect the body from bacterial invasion, and have a certain temperature sensitivity, however, these materials have a large gap with the skin in terms of microstructure and mechanical properties

Method used

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  • Cellulose-graft-polyisoprene copolymer and preparation method thereof
  • Cellulose-graft-polyisoprene copolymer and preparation method thereof
  • Cellulose-graft-polyisoprene copolymer and preparation method thereof

Examples

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Embodiment 1

[0063] The preparation of embodiment 1 cellulose macromolecular initiator 1

[0064] Wood pulp cellulose-based macroinitiator 1 was prepared as follows: Take 2 g of wood pulp cellulose and dissolve 50 g of ionic liquid (1-allyl-3 methylimidazolium chloride) at 80° C. for 2 hours. Add 20mL N,N-dimethylformamide and mix well to obtain a bright yellow transparent solution. Under the condition of an ice-water bath, 7.6 mL of 2-bromoisobutyryl bromide was slowly added dropwise to the above solution, and reacted at room temperature for 36 hours after the dropwise addition was completed. After the reaction, the product was precipitated in water to obtain a white flocculent product. After repeated washing with water, the cellulose macromolecular initiator is obtained by vacuum drying at 40-60° C. for 24 hours. In the solid-state carbon nuclear magnetic spectrum of cellulose macromolecular initiator, the peak with chemical shift of 160.8 is the initiating point of atom transfer radic...

Embodiment 2

[0065] The preparation of embodiment 2 cellulose macromolecular initiator 2

[0066] Cotton pulp cellulose-based macromolecular initiator 2 was prepared as follows: the preparation method was the same as in Example 1, except that the selected cellulose was cotton pulp cellulose.

Embodiment 3

[0067] The preparation of embodiment 3 cellulose macromolecular initiator 3

[0068] The hemp pulp cellulose-based macromolecular initiator 3 was prepared as follows: the preparation method was the same as in Example 1, except that the selected cellulose was hemp pulp cellulose.

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Abstract

The invention provides a cellulose-graft-polyisoprene copolymer and a preparation method thereof. Cellulose and isoprene are taken as starting raw materials. Firstly, the cellulose is modified in an ionic liquid to prepare a cellulose macroinitiator; and then homogeneous charge transfer-atom transfer free radical polymerization is performed to prepare the cellulose-graft-polyisoprene copolymer. The invention provides the cellulose-graft-polyisoprene copolymer crosslinked at the tail end of a side chain and the preparation method thereof. The preparation method is characterized in that a ligand with higher catalytic activity and a reducing agent are used, then free radical coupling can be terminated at the tail end of the side chain of a copolymer, namely polyisoprene, obtained by polymerization, and then the cellulose-graft-polyisoprene copolymer crosslinked at the tail end of the side chain can be further obtained. The copolymer has excellent mechanical properties and very high application value and prospects, for example, the copolymer can be used for artificial skin.

Description

technical field [0001] The invention relates to the technical field of biomimetic materials, in particular to a biomimetic material copolymer and a preparation method thereof. Background technique [0002] Nature has a magical creativity, it integrates simple raw materials (cellulose, lignin, protein, etc.) Muscle etc. The essence of biomimetic materials is to learn from nature. The importance of preparing new biomimetic materials with similar or identical properties to biological materials by imitating the microstructure of biological materials is self-evident. Today, biomimetic materials have become one of the most important and hottest research fields. Scientists have successfully developed various biomimetic materials, such as sea cucumber skin (Capadona, J.R., Shanmuganathan, K., Tyler, D.J., Rowan, S.J. & Weder, C.Science319, 1370-1374, (2008)), artificial spider silk (Cranford, S.W., Tarakanova, A., Pugno, N.M.&Buehler, M.J.Nature482,72-U91, (2012)), artificial mus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F236/08C08B3/14A61L27/60A61L27/16
Inventor 王志刚汪钟凯章亚琼蒋峰
Owner UNIV OF SCI & TECH OF CHINA