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dc.contributor.authorDong, Yan-ming
dc.contributor.author董炎明
dc.contributor.authorMao, Wei
dc.contributor.authorWang, Hui-wu
dc.contributor.authorZhao, Ya-qing
dc.contributor.authorLi, Xiao-jian
dc.contributor.authorBi, Dan-xia
dc.contributor.authorYang, Liu-lin
dc.contributor.authorGe, Qiang
dc.contributor.authorFang, Xueming
dc.date.accessioned2011-06-27T03:29:13Z
dc.date.available2011-06-27T03:29:13Z
dc.date.issued2006-07
dc.identifier.citationPOLYMER INTERNATIONAL,2006,55(12):1444-1449zh_CN
dc.identifier.issn0959-8103
dc.identifier.urihttp://dx.doi.org/doi:10.1002/pi.2099
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9823
dc.description.abstractA novel chitosan derivative, acryloyl chitosan (AcCs), and two N-maleoyl chitosans, MaCs-1 and MaCs-2, with different degrees of substitution were synthesized using completely deacetylated chitosan as raw material under different reaction conditions. AcCs is an amphiphilic chitosan derivative, but MaCs-1 and MaCs-2 are soluble in water and organic solvents respectively. The concentrated solutions of AcCs, MaCs-1 and MaCs-2 an demonstrated mesophases and were investigated using polarizing optical microscopy (POM). Circular dichroism (CD) was also employed for determining the critical concentration for mesophase formation. A broad peak in the visible light region of CD spectra had its origin in the appearance of the mesophase, and arose from the selective reflection of cholesteric helix pitches. The results of CD measurements agreed with those of POM. The critical concentration values for aqueous solutions were much lower than those for organic solutions, which was explained by the strong interactions between the chitosan derivatives and water. (C) 2006 Society of Chemical Industry.zh_CN
dc.language.isoenzh_CN
dc.publisherJOHN WILEY & SONS LTDzh_CN
dc.subjectchitosanzh_CN
dc.subjectO-acryloyl chitosanzh_CN
dc.subjectN-maleoyl chitosanzh_CN
dc.subjectcritical concentrationzh_CN
dc.subjectmesophasezh_CN
dc.subjectcircular dichroism (CD)zh_CN
dc.titleMeasurement of critical concentration for mesophase formation of chitosan derivatives in both aqueous and organic solutionszh_CN
dc.typeArticlezh_CN


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