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    QIBEBT Researchers’ Progress in Design and Preparation of Bio-Based Hybrid Materials
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    Update time: 2017-06-30
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    Bio-based materials are a kind of new materials synthesized by biological or chemical methods based on renewable resources. They are environmentally friendly, renewable and biodegradable, which are the frontier of materials science research.

    The Green Low-Carbon Materials Group, led by Prof. JIANG Yijun from the Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT) of the Chinese Academy of Sciences (CAS), has made a series of progress in the design and preparation of bio-based hybrid materials. The related research results have been published in the ACS Nano (DOI:10.1021/acsnano.6b05780, DOI:10.1021/acsnano.7b01221) and have been selected as "Editor Choice".

    The researchers compounded the cellulose gel with the cellulose fibers and prepared the cellulose-based sheet by in situ crosslinking. The wet strength of the material can reach 13 MPa, which overcomes the problem of low wet strength of traditional paper materials. At the same time, the dry strength of the material reaches 76 MPa and the toughness reaches 7 MJ/m3, 4 times and 20 times of ordinary paper, which are even better than those of traditional polymer materials. (Journal of Material Chemistry A,DOI:10.1039/c6ta07681e) More interestingly, cellulose gel network on the surface allows the material to have shape memory property and good barrier properties for water, oil, gas. The material has a great potential to replace petrochemical-based polymer packaging materials.

    Figure 1 Cellulose-based shape memory material

    On the basis of this study, the researchers imitated the "brick and mud" structure of the nacre in nature, and prepared the bio-based artificial nacre by using the in situ crosslinking and molecular interface technology. The mechanical strength of the composite material can reach 580MPa, equivalent to steel and 4-7 times of the nacre. At the same time, its toughness is as high as 12.1 MJ/m3, much higher than steel and nacre. The researchers also studied the barrier properties and electrical properties of the material. This "artificial nacre" composite material has potential application in artificial muscle, tissue engineering, battery, super capacitor and aerospace.

    This work was supported by Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology; China under scholarship of CAS-TWAS; K.C. Wong Education Foundation; Youth Innovation Promotion Association of CAS; the Qingdao Institute of Bioenergy and Bioprocess Technology Director Technology Foundation; the Taishan Scholars Climbing Program of Shandong (No.tspd20150210); the National Natural Science Foundation of China (21433001); the Young Taishan Scholars Program of Shandong Province (tsqn20161052).

     

    Figure 2 Cellulose-based artificial nacre

    Contact: Prof. JIANG Yijun

    Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of SciencesQIBEBT, Qingdao, Shandong, 266101, China

    Email: jiangyj@qibebt.ac.cn

    (Image and text by JIANG Yijun & GE Xuesong)

     

     
     
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