Preparation of Gold Nanoparticles Loaded Chitin Nanofiber Composite
Preparation of Gold Nanoparticles Loaded Chitin Nanofiber Composite
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DOI：
10.4236/anp.2012.13010
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
Z. Shervani;Yukawa Taisuke;S. Ifuku;H. Saimoto;M. Morimoto
中科院分区：
文献类型：
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作者：
Z. Shervani;Yukawa Taisuke;S. Ifuku;H. Saimoto;M. Morimoto
以第二丰富的生物分子甲壳素为原料制备甲壳素纳米纤维（CNFs），负载金属金纳米颗粒（Au NPs），得到有机-无机杂化复合材料。首先通过用NaBH 4还原金前体盐（HAuCl 43 H2O）在可溶性三嵌段共聚物聚（甲基乙烯基醚）（PMVE）中制备预组织的Au NPs，然后将NPs与稀释的CNFs悬浮液混合以获得CNFs-Au NPs复合物。以质量分数为1%的蟹壳甲壳素浆料为原料，在酸性湿态条件下，采用化学和机械相结合的方法制备了宽度为25 ~ 40 nm的纳米纤维。当聚合物稳定的Au NPs与CNF悬浮液共混时，发现所有的Au NPs和56%的聚合物从水相质量转移到与甲壳素的更极性部分缠结。采用数字图像记录、紫外可见光谱、透射电镜、扫描电镜和X射线衍射等手段对复合材料的悬浮液和压缩干膜进行了表征。当70 m厚的非透明复合膜用三环癸烷二甲醇二甲基丙烯酸酯（TCDDMA）树脂浸渍，随后与光引发剂2-羟基-2-甲基苯丙酮聚合时，由于纳米碳纳米纤维填充在树脂的笼中，膜变得透明。
Chitin nanofibers (CNFs) processed from second most abundant biomolecule chitin were loaded with gold metallic nanoparticles (Au NPs) to obtained hybrid organic-inorganic composite which was molded in different forms dispersion, flakes, powder, and transparent thin film. First pre-organized Au NPs were prepared in soluble triblock copolymer poly (methyl vinyl ether) (PMVE) by reduction of gold precursor salt (HAuCl43H2O) by NaBH4 then NPs were mixed with diluted CNFs suspension to obtain CNFs-Au NPs composite. CNFs of width 25 - 40 nm were prepared by combination of chemical and mechanical processing in wet acidic condition from 1 wt% crab shell chitin slurry. When polymer stabilized Au NPs blended with CNF suspension, all Au NPs and 56% polymer were found mass transferred from water phase to entangle with more polar moieties of chitin. Composite’s suspension and compressed dried film were characterized by recording digital images, UV-vis, TEM, SEM, and XRD spectroscopies. When 70 m thin non transparent composite film was impregnated with tricyclodecane dimethanol dimethacrylate (TCDDMA) resin and subsequent polymerized with photoinitiator 2-hydroxy-2-methylpropiophenone, the film became transparent due to filling of nanosized CNFs in the cages of the resin.