期刊论文

Preparation and characterization of cellulose nanofiber in tunable chiral arrangement

中文

科技导报

1000-7857

2016

34

19

41-45

10.3981/j.issn.1000-7857.2016.19.005

31500476:国家自然科学基金 31530009:国家自然科学基金 2015JJ2203:湖南省自然科学基金 15K151:湖南省教育厅开放基金 QJ2014002A:中南林业科技大学青年科学基金 CX2015B305:湖南省研究生创新项目

本校为第一机构

采用硫酸水解联合高压均质化,制备了生物质纳米纤维素晶体(CNC),经超声波处理诱导自组装形成手性排列,并研究了其自组装膜的结构色特征。扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察显示,纤维素纳米晶体尺寸均一,多呈短棒状,具备形成手性排列的结构基础。表面电势、流变性能及偏光特性研究表明,水解时硫酸浓度越高,生成的CNC表面Zeta电位绝对值越大,黏度越大,越利于形成手性排列,从而产生良好的偏光性;CNC经超声波处理有助于自组装成“光子晶体”,显示出较好的结构色。

The cellulose nanocrystals(CNC) of uniform size are prepared by the high-pressure homogenization coupled with the sulfuric acid hydrolysis pretreatments in this paper. The CNC suspension is self-assembled to form a unique chiral arrangement with the ultrasonic treatment. The self-assembled CNC film is shaped further to possess novel structural color characteristics. The size and the morphology of the prepared CNCs are determined by the transmission electron microscope (TEM) and the scanning electron microscope (SEM). The CNCs are rod-like mostly and fully separated in suspension with highly un...