Crystalline reduction, surface area enlargement and pore generation of chitin by instant catapult steam explosion

文献类型： 外文期刊

第一作者： Tian, Zhiqing

作者： Tian, Zhiqing;Wang, Shikui;Hu, Xuefang;Zhang, Zhimin;Liang, Liang

作者机构：

关键词： Chitin; Steam explosion; Pore generation; Molecular weight; Chitin pretreatment

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：9.381； 五年影响因子：8.678 ）

ISSN： 0144-8617

年卷期： 2018 年 200 卷

页码：

收录情况： SCI

摘要： In this study, instant catapult steam explosion (ICSE) was employed for chitin treatment, and the effect of ICSE on the chitin structure was systematically investigated by using a series of analytical techniques including scanning electron microscopy, X-ray diffraction and Brunauer-Emmett-Teller analysis. Due to the powerful seepage force of the steam during ICSE, the crystallinity index of chitin decreased 10.2% in the (1 1 0) plane and 13.3% in the (0 2 0) plane. Significantly larger surface areas (up to 2.5 times greater, 12.69 m(2) / g at 1.6 MPa) with more and larger pores (up to a 3.5 times larger pore volume, 0.0333 cm(3) / g at 2.0 MPa) were achieved after ICSE, and numerous lacerated-like pore shapes were observed on the porous surface of chitin. Importantly, the molecular structure of chitin remained intact with no substantial damage to chitin's molecular weight, thermostability and acetylation (similar to 70%), which ensures the possibility and diversity of further chitin derivatization.

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