水溶性壳聚糖衍生物在粘胶抗菌纤维中的应用

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1、摘要本文制备了乙胺羟乙基壳聚糖(EHCs)、Ⅳ，D一羧甲基壳聚糖(MO--CMCs)和D一羧甲基壳聚糖(O--CMCs)三种壳聚糖衍生物，优化了其制备工艺，对其理化性质进行了系统的分析。制备了三种壳聚糖衍生物的粘胶纤维纺丝液和共混膜，并根据抗菌性挑选了D一羧甲基壳聚糖／粘胶纤维纺丝液进行了纺丝，对其微观结构进行了更为深入的研究。对三种壳聚糖衍生物／粘胶纤维纺丝液进行了流变行为的研究，探讨了壳聚糖衍生物抗菌剂的加入对纺丝液流变行为的影响；又研究了共混膜的微观结构、分散状况、热力学转变、结晶性、力学性能等。结果表明：在低剪切速率下，壳聚糖衍生物／粘胶纤维纺丝液与

2、粘胶原液的流体特性相同，皆为牛顿流体，壳聚糖衍生物的加入降低了纺丝液的粘度，提高了其可纺性。D一羧甲基壳聚糖均匀的分散在粘胶纤维连续相中，而壳聚糖衍生物的加入，没有改变粘胶纤维的热转变曲线，对粘胶纤维的热稳定性没有影响；在共混膜中，壳聚糖衍生物的加入没有对粘胶纤维的结晶度造成大的降低，微观形态观察和热分析表明具有良好的相容性。实验所制得的共混膜及共混纤维具有良好的抗菌性能。纺出的D一羧甲基壳聚糖／粘胶抗菌纤维达到了相应品质的国家标准。关键词：乙胺羟乙基壳聚糖；彤俨羧甲基壳聚糖；俨羧甲基壳聚糖；纺丝；共混膜；流变行为：粘胶纤维ABSTRACTInthispap

3、er，ethylaminehydroxyethylchitosan(EHCs)，At,0一carboxymethylatedchitosan(N,O-CMCs)andO-carboxymethylatedchitosan(O-CMCs)werepreparedandthesynthesismethodswereimproved．Theirphysicalandchemicalpropertieswereanalyzedsystematically．Thespinningsolutionsandfilmsofthederivativeswithviscoser

4、ayon(ⅥUwereprepared,andtheO-CMCs／VRcompoundspinningsolutionwasspinnedtofibertextileforitsantibacterialactivity，followedwithintensivelymicrostructurestudy．Therheologicalbehaviorofthespinningsolutionsandtheeffectcausedbytheadditionofchitosanderivativeinviscoserayonsolutionwasdiscusse

5、d；themicrostructure，dispersionstatus，thermodynamicstransition，crystallinityandmechanicalpropertyofthethreechitosanderivatives／viscoserayoncompoundfilmswerestudied．Theresultsindicatesthatallthechitosanderivatives／viscoserayoncompoundspinningsolutionsareNewtonFluidwiththesamefluidpro

6、pertiesatlowshearrateastheformerviscoserayonsolution．Theadditionofthechitosanderivativestothesolutiondecreasedtheviscosityandincreasedthespinabilities．O-CMCsdispersesinthecontinuousphaseofthefiberhomogeneously，withoutinfluencingthethermodynamictransitiontemperatureandthermodynamics

7、stabilityoftheviscoserayon．Theadditionofthechitosanderivativesintothecompoundfilmsdecreasesthecrystallinityalittle；themicrocosmicsurveyandthermodynamicsanalysisshowsthattheyhavegoodcompatibility．Thetestedantibacterialactivitiesofallthecompoundfibersaregoodandthepropertiesachievethe

8、correspondingnationalstand