Graft polymerization of acrylic acid onto chitin nanofiber to improve dispersibility in basic water
Graft polymerization of acrylic acid onto chitin nanofiber to improve dispersibility in basic water
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DOI：
10.1016/j.carbpol.2012.05.087
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发表时间：
2012-09-01
影响因子：
11.2
通讯作者：
Saimoto, Hiroyuki
中科院分区：
文献类型：
--
作者：
Ifuku, Shinsuke;Iwasaki, Masayoshi;Saimoto, Hiroyuki
以过硫酸钾为自由基引发剂，在水介质中进行了丙烯酸（AA）在甲壳素纳米纤维上的接枝共聚。接枝AA的摩尔比随AA浓度的增加而增加。采用FT-IR、FE-SEM、UV-vis、XRD和TGA对接枝的甲壳素纳米纤维进行了表征。聚合后的甲壳素纳米纤维保持了其特有的形态。由于纳米纤维之间的静电斥力作用，接枝AA的几丁质纳米纤维在碱性水中能有效地解离并均匀分散。将AA接枝在甲壳素纳米纤维的表面和非晶态部分，保持了α -甲壳素原有的晶体结构。在330℃时，接枝共聚物的重量残渣随着接枝AA含量的增加而增加。(C) 2012 Elsevier Ltd.版权所有。
Graft copolymerization of acrylic acid (AA) on chitin nanofibers was carried out with potassium persulfate as a free radical initiator in an aqueous medium. The molar ratio of grafted AA increased with the AA concentration. The grafted chitin nanofibers were characterized by FT-IR, FE-SEM, UV-vis, XRD, and TGA. After polymerization, the characteristic morphology of chitin nanofibers was maintained. Chitin nanofibers grafted with AA were efficiently dissociated and dispersed homogeneously in basic water because of the electrostatic repulsion effect between nanofibers. AA was grafted on the surface and amorphous part of chitin nanofibers, and the original crystalline structure of a-chitin was maintained. At 330 degrees C, the weight residue of the graft copolymer increased with the grafted AA content. (C) 2012 Elsevier Ltd. All rights reserved.