Characterization and Layer-by-layer Self-assembly of PVA/NCC/PVA
LIU Zhi-ming1, WU Peng1, XIE Cheng1, WANG Hai-ying2, MENG Wei2
1. Key Laboratory of Bio-based Material Science and Technology of Ministry of Education,College of Material Science and Engineering,Northeast Forestry University,Harbin 150040,China;
2. College of Forestry, Northeast Forestry University,Harbin 150040,China
Abstract：The composite membrane of polyvinyl alcohol(PVA) / nanocrystalline cellulose(NCC)/ PVA was prepared by layer-by-layer(LBL) self-assembly based on the driving force of hydrogen bonding. The single-phase distribution of NCC and PVA, the NCC lattice arrangement state and the structure of NCC as an interlayer were verified through attenuated total reflection infrared (ATR-IR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The mechanism hypothesis was proposed to argue the formation process of this composite membrane. Through the measurements of tensile strength, light transmittance and thermal stability, it indicates that the PVA/NCC/PVA composite membrane from LBL self-assembly has high tensile strength, high transmittance and much more thermal stability. Compared to PVA membrane, the tensile strength and light transmittance of the composite membrane improve 46.1% and 5.44%, respectively, as well as the thermal stability increases 13.2℃. This indicates that the PVA/NCC/PVA composite membrane from LBL self-assembly is a good functional membrane.
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