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SYNTHESIS AND PROPERTIES OF ORGANO-FLY ASH/POLY ANILINE WITH CORE/SHELL STRUCTURE BASED ON EMULSION POLYMERIZATION

Chinese Journal of Polymer Science 2012年第6期30卷 808-814页

作者：雷西萍 Key Laboratory of Western Architecture and Technology School of Materials Science and EngineeringXi'an University of Architecture and Technology

Organo-fly ash （OFA） was prepared with pretreated fly ash （FA） and hexadecyltrimethyl ammonium bromide （HDTMAB）, and the composites composed of OFA and polyaniline were obtained by emulsion polymerization at different OFA weight ratios （2.0 wt%, 5.0 wt%, 10.0 wt%, 15.0 wt% and 20.0 wt%） in the presence of dodecylbenzenesulfonic acid as dopant and emulsifier. A polymerization procedure was supposed. The electrical conductivities of the composites were tested by the four-probe technique. The chemical structure and crystallinity of the composites were confirmed by FT-IR and X-ray diffraction, respectively. Morphologies of FA, OFA and the composites were observed by SEM. The element analysis was performed by energy dispersive spectrometry. The thermal stability of the composites was analyzed by TGA. The results showed that the electrical conductivity of the composites decreased with increasing the feed weight ratio of OFA, and the lowest value was 0.62 S/cm. HDTMAB and PAn were just adsorbed on the surface of FA and OFA, respectively according to the physical adsorption without destroying the crystalline structure of FA or OFA. The surface became smoother after organification of FA by using HDTMAB, and its content on FA surfaces was about 26.9 wt%. The core/shell structure of the composite was observed by SEM analysis. The composites showed a higher thermal stability than pure PAn by introduction of OFA into this polymerization system, the heat stability of PAn was increased by decreasing 31.8 wt% of weight loss after introducing 20 wt% of OFA.

关键词： Fly ash Polyaniline hexadecyltrimethyl ammonium bromide Core/shell Emulsion polymerization.

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INTROMISSION OF WATER-REPELLENT AND HYDROSCOPIC PROPERTIES SIMULTANEOUSLY TO PP BY PLASMA DISCHARGE METHOD

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Chinese Journal of Polymer Science 2005年第1期23卷 83-92页

作者： JieLiang Bi-qianLiu InstituteofChemistry ChineseAcademyofSciencesBeijing100080China

Plasma-induced surface graft copolymerization of acrylic acid on polypropylene non-woven fabric(PP-g-AA)andpolypropylene membrane were *** extents of grafting were controlled by the plasma and *** ammonium bromide was then coupled with the carboxyl group of PP-g-AA to obtain apolyion complex(PIC).At last,CF_4 plasma was used to give PICs hydrophobic *** moisture regain and water-repellency of the processed PICs was *** surfaces were characterized using ATR FT-IR and *** resultindicates that the products have very high ability to adsorb moisture,even better than cotton *** the same time,theproducts show excellent hydrophobic property,which can't be wetted by those reagents whose surface tensions were higherthan 327 mN/m.

关键词： Polypropylene non-woven fabric Plasma-induced grafting hexadecyltrimethyl ammonium bromide CF_4 plasma treatment Moisture sorption Hydrophobicity.

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