Fabrication of poly (n-isopropylacrylamide-co-itaconic acid) hydrogels in dmso/water mixtures and their characterization
文献类型：期刊论文
| 作者 | Ling, You Dao1,2; Lu, Man Geng1 |
| 刊名 | Iranian polymer journal
 |
| 出版日期 | 2008-02-01 |
| 卷号 | 17期号:2页码:155-166 |
| 关键词 | Hydrogels Dmso Phase separation Energy barrier Chain conformations |
| ISSN号 | 1026-1265 |
| 通讯作者 | Lu, man geng(mglu@gic.ac.cn) |
| 英文摘要 | In this article, ph and temperature double responsive poly (n-isopropylacrylamide-co-ia) hydrogels were prepared by copolymerization in mixed solvents of water and dimethylsulphoxide (dmso) above zero. the freshly fabricated p(nipaam-co-ia) hydrogels were characterized by fourier transform infrared spectroscopy (ftir), thermogravimetric analysis (tga) and scanning electron microscopy (sem) techniques to investigate their chemical compositions, structures, and morphologies. the results showed that all of these gels have similar chemical compositions and structures but differ in surface morphologies. the hydrogels prepared with highest dmso/water ratios have porous surfaces, while the other gels exhibit smooth and dense surfaces. temperature and ph sensitivities of the resultant hydrogels were examined through swelling ratios and deswelling/reswelling kinetics experiments, as well. the results indicated that only hydrogels prepared in the highest dmso/water ratio media exhibited improved properties such as higher swelling ratios, faster deswelling and reswelling kinetics compared with traditional p(nipaam-co-ia) hydrogels, as the other hydrogels possessed lower swelling ratios and slower deswelling and reswelling dynamics. we have proposed that there maybe an energy barrier existed for conformation transitions in the process of removal of dmso by water. only the gels which could overcome the energy barrier exhibited expanded network structures and improved properties while, the other gels maintained their contracted network structures and poor properties. |
| WOS关键词 | DRUG-DELIVERY ; POLY(N-ISOPROPYLACRYLAMIDE) HYDROGEL ; THERMOSENSITIVE HYDROGELS ; SWELLING CHARACTERIZATION ; MIXED-SOLVENTS ; WATER ; CONONSOLVENCY ; RELEASE ; PH ; TRANSITION |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000254028400006 |
| 出版者 | POLYMER RESEARCH CENTER IRAN |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2391239 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Lu, Man Geng |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Chem, Guangzhou 510650, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ling, You Dao,Lu, Man Geng. Fabrication of poly (n-isopropylacrylamide-co-itaconic acid) hydrogels in dmso/water mixtures and their characterization[J]. Iranian polymer journal,2008,17(2):155-166. |
| APA | Ling, You Dao,&Lu, Man Geng.(2008).Fabrication of poly (n-isopropylacrylamide-co-itaconic acid) hydrogels in dmso/water mixtures and their characterization.Iranian polymer journal,17(2),155-166. |
| MLA | Ling, You Dao,et al."Fabrication of poly (n-isopropylacrylamide-co-itaconic acid) hydrogels in dmso/water mixtures and their characterization".Iranian polymer journal 17.2(2008):155-166. |
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来源：中国科学院大学
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