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Mechanically adaptive cellulose-poly(acrylic acid) polymeric composites in wet–dry cycles

Authors

  • Hongsheng Luo,

    1. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
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  • Jinlian Hu,

    Corresponding author
    1. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
    • Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
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  • Yong Zhu,

    1. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
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  • Jian-Yong Wu,

    1. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
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  • Sheng Zhang,

    1. State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Institute of Sichuan University, Chengdu 610065, People's Republic of China
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  • Ying Fan,

    1. State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Institute of Sichuan University, Chengdu 610065, People's Republic of China
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  • Guangdou Ye

    1. State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Institute of Sichuan University, Chengdu 610065, People's Republic of China
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Abstract

Polymeric composites consisting of cellulose and poly(acrylic acid) (PAA) are prepared by coagulation/bulk polymerization method. Scanning electron microscopy and thermal gravimetric analysis are used to investigate the homogeneity and the heat-induced water loss of the composites, respectively. The water absorbed in the composites has strong hydrogen bonding with the polymer chains, as determined by differential scanning calorimetry. The mechanical and structural properties of the composites vary reversibly when the composites are applied into specifically explored wet–dry cycles, which are comprehensively measured by dynamic mechanic analysis, wide-angle X-ray diffraction, and Fourier transform infrared. It is unprecedented to explore the cellulose-PAA composites as a mechanical adaptive material. The cellulose and the PAA chemically react with each other. Most of the cellulose content remains in amorphous state. Thus, the water molecules can diffuse into the composites, leading to the wet–dry mechanical adaptability of the composites. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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