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A kind of artificial skin and its preparation method and application
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A technology of artificial skin and maximum strain applied in the field of bionic materials to achieve good biocompatibility
Inactive Publication Date: 2014-10-29
UNIV OF SCI & TECH OF CHINA
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There are currently no reports showing the ability to mimic the microstructure and mechanical properties of skin
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Embodiment 1
[0039] The preparation of the cellulose-graft-polyisoprene copolymer 1 of embodiment 1 side chain terminal crosslinking
[0040] A macromolecular initiator based on wood pulp cellulose 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 shif...
Embodiment 2
[0042] The preparation of the cellulose-graft-polyisoprene copolymer 2 of embodiment 2 side chain terminal crosslinking
[0043] The cellulose-graft-polyisoprene copolymer 2 cross-linked at the end of the side chain was prepared as follows: the preparation method was the same as in Example 1, except that the amount of the cellulose macroinitiator was 960 mg. A side chain terminal crosslinked cellulose-graft-polyisoprene copolymer 2 having a cellulose content of 14.7% by weight and a polyisoprene content of 85.3% by weight was obtained. Described copolymer 2, its microstructure sees Figure 2b , cellulose nanospheres dispersed in a polyisoprene matrix.
Embodiment 3
[0044] The preparation of the cellulose-graft-polyisoprene copolymer 3 of embodiment 3 side chain terminal crosslinking
[0045] The cellulose-graft-polyisoprene copolymer 3 cross-linked at the end of the side chain was prepared as follows: the preparation method was the same as in Example 1, except that the amount of the cellulose macroinitiator was 600 mg. A side chain terminal crosslinked cellulose-graft-polyisoprene copolymer 3 having a cellulose content of 8.7% by weight and a polyisoprene content of 93.3% by weight was obtained.
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Abstract
The invention provides artificial skin, a preparation method therefor and applications thereof. The artificial skin is prepared and obtained from cellulose-grafting-polyisoprene copolymers. The artificial skin has microstructures similar to skin corium layers, and has mechanical properties of skins. The content of system cellulose is adjusted, so the microstructures and the mechanical properties of the artificial skin can be adjusted and controlled, and therefore different types of skins can be simulated. Because the artificial skin has excellent biocompatibility and the mechanical properties of skins, the artificial skin has wide application prospects in the biomedical field.
Description
technical field [0001] The invention relates to the technical field of bionic materials, in particular to an artificial skin and its preparation method and application. 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 muscles (L...
Claims
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