刘名金;姚勇波;陈仕艳;王华平;
LIU Ming-jin;YAO Yong-bo;CHEN Shi-yan;WANG Hua-ping;State Key Laboratory of Fiber Material Modification, College of Materials Science and Engineering,Donghua University;

• 1:东华大学材料科学与工程学院纤维材料改性国家重点实验室

摘要(Abstract)：

首先将纤维素纳米晶体(CNC)悬浮液进行超声分散,然后与壳聚糖乙酸溶液进行高速搅拌共混,制备不同CNC含量的壳聚糖-CNC共混均匀溶液。采用平板式旋转流变仪研究了CNC含量对壳聚糖溶液流变行为的影响。测试结果表明:壳聚糖-CNC共混溶液表现为非牛顿流体行为;黏度随温度的上升而下降,但在高剪切速率范围内,温度对黏度的影响不再明显;随着CNC含量的增加,壳聚糖溶液的表观黏度增大,对剪切速率的敏感性增强,同时非牛顿指数和黏流活化能降低;共混原液的结构黏度指数随CNC含量减少以及温度升高而降低;壳聚糖-CNC共混溶液储能模量和损耗模量的交叉点随温度的升高向高频区移动,随CNC含量的增加向低频区移动,溶液流变规律基本符合Cox-Merz规则。
First, suspension of cellulose nanocrystal(CNC) was prepared by ultrasonic dispersion, and thenchitosan-CNC blend solutions of different CNC contents were prepared with acetic acid solution of chitosanby high-speed mixing blend. The influences of CNC content on the rheological behavior of chitosan solutionwere investigated by the plate rotational rheometer. The test results showed that the chitosan-CNC blendsolution showed non- Newtonian behavior. The viscosity decreased when the temperature rised, but theinfluence on the viscosity was no significant in the high shear rate range. The apparent viscosity of chitosansolution increased with the increase of CNC content, and the sensitivity was enhanced to shear rate, also thenon-Newtonian index and viscous flow activation energy of chitosan solution decreased with the increase ofCNC content. The structural viscosity index of the blend solution decreased with CNC content decreasingand temperature increasing. The cross points of the storage modulus and the loss modulus of chitosan-CNCblend solution were moved to the high frequency region with the increase of temperature and were moved tothe low frequency region with the increase of CNC content. The rheological behavior of the solution wasbasically in accordance with the rules of Cox-Merz.

关键词(KeyWords)： 壳聚糖;纤维素纳米晶体;共混;流变行为
chitosan;cellulose nanocrystal;blend;rheological behavior

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘名金;姚勇波;陈仕艳;王华平;
LIU Ming-jin;YAO Yong-bo;CHEN Shi-yan;WANG Hua-ping;State Key Laboratory of Fiber Material Modification, College of Materials Science and Engineering,Donghua University;

Email:

参考文献(References)：

• [1]李梦琴,任红涛,王跃,等.玉米醇溶蛋白壳聚糖复合膜的制备[J].中国食品学报,2011,11(4):71-77.
• [2]Khan A,Khan R A,Salmieri S,et al.Mechanical and barrier properties of nanocrystalline cellulose reinforced chitosan based nanocomposite films[J].Carbohydrate polymers,2012,90(4):1 601-1 608.
• [3]王畅,陈晓明.壳聚糖复合生物材料研究进展[J].化工中间体,2007,1(2):1-3.
• [4]别亚琴,刘维锦.高强度壳聚糖纤维的制备和应用进展[J].化纤与纺织技术,2008(1):25-30.
• [5]王载利,李达,马建伟.壳聚糖纤维的应用前景及其生产技术的新进展[J].现代纺织技术,2011,19(2):52-54.
• [6]Azizi Samir M A S,Alloin F,Dufresne A.Review of recent research into cellulosic whiskers,their properties and their application in nanocomposite field[J].Biomacromolecules,2005,6(2):612-626.
• [7]Habibi Y,Lucia L A,Rojas O J.Cellulose nanocrystals:chemistry,selfassembly,and applications[J].Chemical Reviews,2010,110(6):3 479-3 500.
• [8]Lam E,Male K B,Chong J H,et al.Applications of functionalized and nanoparticle-modified nanocrystalline cellulose[J].Trends in biotechnology,2012,30(5):283-290.
• [9]Schwall C T,Banerjee I A.Micro-and nanoscale hydrogel systems for drug delivery and tissue engineering[J].Materials,2009,2(2):577-612.
• [10]Hwang J K,Shin H H.Rheological properties of chitosan solutions[J].Korea-Australia Rheology Journal,2000,12(3/4):175-179.
• [11]Yudin V E,Dobrovolskaya I P,Neelov I M,et al.Wet spinning of fibers made of chitosan and chitin nanofibrils[J].Carbohydrate Polymers,2014,108:176-182.
• [12]金日光,华幼卿.高分子物理[M].北京:化学工业出版社,1991:198-203.
• [13]杨庆,沈新元,郯志清,等.聚丙烯腈与壳聚糖纺丝原液的流变性能研究[J].金山油化纤,2006,24(4):15-20.
• [14]张德刚,张舰,周日辉,等.碳纳米管对聚丙烯腈溶液流变行为的影响[J].合成技术及应用,2010(1):50-53.
• [15]Lv Y,Wu J,Zhang J,et al.Rheological properties of cellulose/ionic liquid/dimethylsulfoxide(DMSO)solutions[J].Polymer,2012,53(12):2 524-2 531.
• [16]臧昆,臧己.纺丝流变学基础[M].北京:纺丝工业出版社,1993:268-269.
• [17]Chun S Y,Yoo B.Rheological behavior of cooked rice flour dispersions in steady and dynamic shear[J].Journal of food engineering,2004,65(3):363-370.
• [18]Kuang Q L,Zhao J C,Niu Y H,et al.Celluloses in an ionic liquid:the rheological properties of the solutions spanning the dilute and semidilute regimes[J].The Journal of Physical Chemistry B,2008,112(33):10 234-10 240.
• [19]Lue A,Zhang L.Rheological behaviors in the regimes from dilute to concentrated in cellulose solutions dissolved at low temperature[J].Macromolecular bioscience,2009,9(5):488-496.