摘要
采用辉光放电电解等离子体(GDEP)制备以生物质为基材的水凝胶材料鲜见报道。为获得环保的水凝胶材料,利用GDEP引发制备出了以纤维素为基材的水凝胶材料。采用扫描电镜(SEM)和红外光谱(FT-IR)对制备的水凝胶的微观形态和结构进行了表征,同时也考察了放电电压对水凝胶的溶胀、p H、盐多重响应行为的影响。结果表明:在放电电压570 V下制备的水凝胶的溶胀率最大为898 g/g;水凝胶在低或高p H缓冲溶液中网络结构收缩,溶胀率低;相对于Na+缓冲溶液,水凝胶对Ca2+和Fe3+缓冲溶液更为敏感,表现为体积收缩,溶胀率低。制备的纤维素水凝胶在不同p H缓冲溶液中具有可逆的开关响应行为,可逆循环利用3次以上。
Using glow discharge electrolysis plasma（GDEP） to prepare biomaterial-based hydrogel is rarely reported. To obtain eco-friendly hydrogel, we prepared a novel cellulose-based hydrogel using GDEP, and characterized the hydrogel＇s network through Fourier transform infrared spectroscopy（FT-IR） and scanning electron microscopy（SEM）. We also investigated the effects of GDEP＇s discharge voltage on the hydrogel＇s swelling, stimuli response to pH, and stimuli response to salts through experiments. The results show that the hydrogel prepared with discharge of 570 V holds swelling ratio of 898 g/g. The hydrogel network has shrinkage occurred at low or high pH, and thus the hydrogel shows lower swelling ratio. Compared with Na^＋ buffer solution, the cellulose-based hydrogel is more sensitive to Ca^2＋ and Fe^3＋, which could be observed as network shrinkage and low swelling ratio. In buffer solution＇s different pH, the hydrogel consistently shows reversible switch response behavior, and this reversible cycle lasts for at least three rounds.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第2期523-528,共6页
High Voltage Engineering
基金
国家自然科学基金(51263006)
海南省国际科技合作专项基金(KJHZ2014-02)
中国博士后基金(2013M540213)
河北省教育厅青年基金(QN2014057)~~
关键词
辉光放电电解等离子体
放电电压
纤维素
水凝胶
溶胀率
响应行为
glow discharge electrolysis plasma
discharge voltage
cellulose
hydrogel
swelling ratio
response behavior
