研究了在均相条件下制备接枝率高、均一性好的丙烯酸接枝改性纳米纤维素晶体(AA-NCC).纤维素原料在65％的氯化锌溶液中高速剪切溶解,再以过硫酸钾为引发剂,使纤维素与丙烯酸单体发生均相接枝共聚反应,进一步进行超声波处理,得到了AA-NCC.采用透射电子显微镜、X射线衍射仪和傅里叶变换红外光谱仪等对AA-NCC的微观形貌、晶体结构、谱学等性能进行表征研究.结果表明,AA-NCC为均匀的球形,粒径约为10 nm～ 40 nm,分散性有明显改善.而且AA-NCC具有纤维素的基本化学结构,但其结晶结构发生明显变化,结晶度下降.
参考文献
| [1] | H.P.S. Abdul Khalil;A.H. Bhat;A.F. Ireana Yusra .Green composites from sustainable cellulose nanofibrils: A review[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2012(2):963-979. |
| [2] | Siro, I;Plackett, D .Microfibrillated cellulose and new nanocomposite materials: a review[J].Cellulose,2010(3):459-494. |
| [3] | Habibi, Y.;Lucia, L.A.;Rojas, O.J. .Cellulose nanocrystals: Chemistry, self-assembly, and applications[J].Chemical Reviews,2010(6):3479-3500. |
| [4] | 叶代勇,姚雷.纤维素与丙烯酸在氯化锌水溶液中的均相接枝[J].华南理工大学学报（自然科学版）,2012(05):52-57,64. |
| [5] | 崔莉,贾军芳,张传杰,王蛟,刘云,朱平.纤维素多孔材料的制备与性能[J].高分子材料科学与工程,2013(10):142-145. |
| [6] | Yan LF;Gao ZJ .Dissolving of cellulose in PEG/NaOH aqueous solution[J].Cellulose,2008(6):789-796. |
| [7] | Alemdar A;Sain M .Isolation and characterization of nanofibers from agricultural residues - Wheat straw and soy hulls[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2008(6):1664-1671. |
| [8] | Jihua Li;Xiaoyi Wei;Qinghuang Wang .Homogeneous isolation of nanocellulose from sugarcane bagasse by high pressure homogenization[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2012(4):1609-1613. |
| [9] | B.Xiao;X.F.Sun;RunCand Sun .Chemical, structural, and thermal characterizations of alkali-soluble lignins and hemicelluloses, and cellulose from maize stems, rye straw, and rice straw[J].Polymer Degradation and Stability,2001(2):307-319. |
| [10] | 唐丽荣,黄彪,戴达松,欧文,李涛,周东东,陈学榕.阳离子交换树脂催化制备纳米纤维素晶体的谱学性能与流变行为[J].高分子材料科学与工程,2011(06):45-48. |
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