文章摘要
代明允,田野,刘鹰,具本植.(会议论文)2-羟基-3-烯丙氧基丙基羟乙基纤维素的制备及温度敏感性能[J].精细化工,2019,36(4):
(会议论文)2-羟基-3-烯丙氧基丙基羟乙基纤维素的制备及温度敏感性能
Preparation of 2-Hydroxy-3-allyloxypropyl Hydroxyethyl Cellulose and Temperature-sensitive Properties
投稿时间:2018-09-30  修订日期:2018-12-24
DOI:
中文关键词: 羟乙基纤维素  温度敏感  最低临界溶解温度  生物降解  功能材料
英文关键词: hydroxyethyl cellulose  temperature-sensitive  LCST  biodegradation  functional materials
基金项目:国家重点基础研究发展计划(973计划);国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
代明允 大连海洋大学  
田野 大连海洋大学 tianye@dlou.edu.cn 
刘鹰 大连海洋大学  
具本植 大连理工大学  
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中文摘要:
      利用醚化反应将烯丙基缩水甘油醚(AGE)接枝到羟乙基纤维素骨架上,制备出具有温度敏感性的2-羟基-3-烯丙氧基丙基羟乙基纤维素(HAPEC)。HAPEC的最低临界溶解温度(LCST)可通过改变疏水基团的取代度进行调节。当HAPEC的取代度从1.30增加到2.71,LCST从64.3℃降低到28.5℃。通过荧光光谱、动态光散射法(DLS)研究HAPEC在水溶液中的自组装行为,并测定临界胶束浓度(CMC)。结果表明,HAPEC在水溶液中可自组装形成胶束,并且CMC随着HAPEC取代度的增大而减小。当HAPEC的取代度从1.11增加到2.71,CMC从0.145 mg/mL下降至0.021 mg/mL。参照ASTMD 5988-03标准并利用扫面电镜(SEM)研究了HAPEC的生物降解度及降解前后HAPEC样品形貌的变化。HAPEC具有良好的生物降解性,降解90天后,HAPEC样品的形貌变化明显,生物降解程度可高达36.5%。
英文摘要:
      Hydroxyethyl cellulose is used as the hydrophilic polymer backbone, the hydrophobic agent allyl glycidyl ether (AGE) is grafted onto the hydroxyethyl cellulose backbone by etherification reaction, the suitable hydrophilic and lipophilic balance of hydroxyethyl cellulose are adjusted by adjusting the substitution of the hydrophobic allyl group, 2-hydroxy-3-allyloxypropyl hydroxyethyl cellulose (HAPEC) with temperature sensitivity was prepared. The transmittance change of the HAPEC aqueous solution with different temperature is studied by a temperature-controlled UV spectrophotometer and the lowest critical solution temperature (LCST) of HAPEC is determined. The study shows that LCST decreases linearly with the increase of molar substitution (MS) of hydrophobic allyl groups. When the MS of HAPEC increases from 1.30 to 2.71, the LCST decreases from 64.3℃ to 28.5℃. The results of this study indicate that the LCST of HAPEC can be adjusted by changing the MS of hydrophobic groups. The self-assembly behavior of amphiphilic HAPEC in aqueous solution is investigated by fluorescence spectroscopy and dynamic light scattering (DLS) , the critical micelle concentration (CMC) is determined. The result shows that HAPEC can be self-assembled to be micelle in solution, and CMC decreases with the increase of MS. When the MS of HAPEC increases from 1.11 to 2.71, the CMC decreases from 0.145 mg/mL to 0.021 mg/mL. The biodegradation of HAPEC is studied according to ASTMD 5988-03, and scanning electron microscope (SEM) is used to compare the morphology of HAPEC samples before and after degradation. The result shows that HAPEC has good biodegradability. After 90 days of degradation, the shape of HAPEC samples changes significantly, and the biodegradation rate is as high as 36.5%.
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