| 任杰,陶丽,王莉萍,姚萌奇,顾金芬,杨武.化学通报,2015,78(6):566-569,575. |
| 自然光照下PEG/PAA 凝胶在Fe3+/CA溶液中的 凝胶-溶胶转化行为的研究 |
| A conversion behavior of PEG/PAA gel in Fe3 /CA solution in sunlight |
| 投稿时间：2014-11-13 修订日期：2015-01-09 |
| DOI： |
| 中文关键词: PEG/PAA 凝胶-溶胶转化 Fe3+/CA溶液 |
| 英文关键词:PEG/PAA Gel-sol transformation Fe3 /CA solution |
| 基金项目:甘肃省高等学校基本科研业务费项目 |
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| 中文摘要: |
| 本文将PEG/PAA凝胶浸入铁/柠檬酸（Fe3+/CA）溶液中，在自然光照一定的时间可实现凝胶-溶胶的相互转化，而且转化行为受溶液的组成及其pH值的影响。只有当溶液中[Fe3 ]0: [CA]0≤1:2，且溶液的pH在1-6之间，该转化才会发生，通过改变溶液中[Fe3 ]0: [CA]0的值或溶液的pH可以有效地控制其转化速率。此外，实验结果表明，当凝胶转化为溶胶后，在其中加入高价金属阳离子，例如Fe3 、 Al3 、Ce4 、Cu2 等，溶胶又会再次转化为凝胶。由于这种新颖的特性，该凝胶有望应用于药物释放、细胞培养等领域。 |
| 英文摘要: |
| A novel phase transition behavior of PEG/PAA gel was firstly observed involving a controllable conversion from gel to sol when it was immersed in solution containing Fe3 ions and citric acid under sunlight radiation for a certain time. The transformation process could be controlled effectively by changing the ratio of Fe3 concentration to citrate acid concentration and the pH of the solution. This phenomenon occurred only when the concentration ratio was less than 1:2 and the value of pH was in the range of 1-6. In addition, the sol would change into gel again if metal cations, such as Fe3 、Al3 、Ce4 、Cu2 were added into the system. The new characteristics of the gel may make it become a perfect material in the drug release, cell culture and so on. |
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