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壳聚糖/聚乙烯醇共混超细纤维的制备及紫外光交联研究 总被引:4,自引:0,他引:4
用静电纺丝法制备壳聚糖/聚乙烯醇的共混超细纤维,采用扫描电镜考察了纺丝液浓度、共混物配比、喷丝口内径对纤维形貌的影响.此外,为减少壳聚糖/聚乙烯醇纤维膜的溶胀变形,在上述体系中加入可光交联的单体二缩三乙二醇双甲基丙烯酸酯(TEGDMA)、引发剂2-羟基-2-甲基-1苯基丙酮(1173),对电纺纤维进行紫外光交联.结果表明,当壳聚糖与聚乙烯醇质量比为8:2的共混体系中加入占混合溶液质量分数4%的TEGDMA、0.12%的1173作为交联剂时,所得的无纺布纤维直径比较均一,平均约为200 nm,经光交联处理后其耐水性能得到提高. 相似文献
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Based on the branching fractions of J/ψ→VP from different experiments, we investigate the properties of the coupling constants of J/ψ→VP decays using a model-dependent approach. We find that the octet coupling constant, g8, of strong interaction is about twice larger than that of the singlet coupling constant g1; the electromag- netic breaking parameters gEi are larger than the mass breaking parameters gMi, moreover, the three parameters of the electromagnetic effect are about equal, but the three parameters of the mass effect are obviously different and their uncertainties are also large; and the phase angle between strong and electromagnetic interactions is in the range of 70°-80°. It deepens our understanding of the coupling constant of J/ψ→VP decays. 相似文献
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