Preparation and phase transition behaviors of temperature-responsive 3-butoxy-2-hydroxypropyl hydroxyethyl celluloses
Preparation and phase transition behaviors of temperature-responsive 3-butoxy-2-hydroxypropyl hydroxyethyl celluloses
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DOI：
10.1080/09205063.2015.1077918
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
Ye Tian;Benzhi Ju;Shufen Zhang;Xiuling Duan;D. Dong
中科院分区：
文献类型：
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作者：
Ye Tian;Benzhi Ju;Shufen Zhang;Xiuling Duan;D. Dong
2-羟基-3-丁氧丙基羟乙基纤维素(HBPEC)是由丁基缩水甘油醚接枝到羟乙基纤维素上制备的温敏性聚合物。文中还研究了几种因素对HBPEC浊点的影响。通过改变疏水基团的摩尔取代度，HBPEC的T_c可调到17.0~43.0℃。随着HBPEC浓度的增加，相变速度加快，T_c呈线性下降。用一系列具有常见阴离子或阳离子的盐研究了特定阴离子或阳离子对HBPEC水溶液的T_c的影响。研究发现，阳离子特性和浓度的变化对HBPEC的T_c有很大影响。绘制T_c与阳离子活度的关系图表明，T_c可根据电荷密度进行分类。
2-Hydroxy-3-butoxypropyl hydroxyethyl celluloses (HBPEC), which are thermoresponsive polymers, are prepared by grafting butyl glycidyl ether onto hydroxyethyl cellulose. The effects of several factors on the cloud point (Tc) of the HBPEC are also investigated. The Tc of HBPEC can be tuned to a ranging from 17.0 to 43.0 °C by changing the molar substitution of hydrophobic groups. Increasing the concentration of HBPEC leads to a faster phase transition as well as a corresponding linear decrease in the Tc. A series of salts with common anions or cations are used to investigate the effects of specific anions or cations on the Tc of HBPEC aqueous solutions. It is discovered that the Tc of HBPEC is largely influenced by the variation of cation identity and concentration. Plotting Tc as a function of cation activity shows that the Tc can be classified by charge density.