Diblock copolymer of bacterial cellulose and poly(methyl methacrylate) initiated by chain-end-type radicals produced by mechanical scission of glycosidic linkages of bacterial cellulose.
Diblock copolymer of bacterial cellulose and poly(methyl methacrylate) initiated by chain-end-type radicals produced by mechanical scission of glycosidic linkages of bacterial cellulose.
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DOI：
10.1021/bm100879v
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发表时间：
2010-09
影响因子：
6.2
通讯作者：
M. Sakaguchi;T. Ohura;T. Iwata;Shuhei Takahashi;S. Akai;Toshiyuki Kan;H. Murai;M. Fujiwara;O. Watanabe;Mamiko Narita
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文献类型：
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作者：
M. Sakaguchi;T. Ohura;T. Iwata;Shuhei Takahashi;S. Akai;Toshiyuki Kan;H. Murai;M. Fujiwara;O. Watanabe;Mamiko Narita
细菌纤维素(BC)在77K的真空中被机械断裂，导致BC的β-1，4糖苷键断裂。用电子自旋共振(ESR)谱分析对生成的链端型自由基(机械键)进行了归属。在77K下，BC与甲基丙烯酸甲酯(MMA)在真空中机械断裂，制得BC与聚甲基丙烯酸甲酯两嵌段共聚物(BC-BLOCK-PMMA)。BC表面被BC-嵌段-PMMA的PMMA链完全覆盖。通过ESR、傅立叶变换红外光谱、核磁共振氢谱和凝胶渗透色谱分析，证实了BC-嵌段PMMA对BC表面的新型改性。
Bacterial cellulose (BC) was mechanically fractured in vacuum at 77 K; this resulted in the scission of the β-1,4 glycosidic linkages of BC. The chain-end-type radicals (mechanoradicals) generated from the scissions were assigned by electron spin resonance (ESR) spectral analyses. A diblock copolymer of BC and poly(methyl methacrylate) (BC-block-PMMA) was produced by the mechanical fracture of BC with MMA (methyl methacrylate) in vacuum at 77 K. Radical polymerization of MMA was initiated by the mechanoradicals located on the BC surface. The BC surface was fully covered with the PMMA chains of the BC-block-PMMA. Novel modification of the BC surface with the BC-block-PMMA was confirmed by spectral analyses of ESR, Fourier-transform infrared, (1)H NMR, and gel permeation chromatography.