羧甲基纤维素锂(CMC-Li)的合成流变和静电纺丝功能化材料研究

doi:10.6023/A13060680

化学学报 ›› 2013, Vol. 71 ›› Issue (11): 1521-1526.DOI: 10.6023/A13060680 上一篇下一篇

研究论文

羧甲基纤维素锂(CMC-Li)的合成流变和静电纺丝功能化材料研究

邱磊^a, 邵自强^a, 王建全^a, 张大伦^a, 曹军^b

a 北京市纤维素及其衍生物材料工程技术研究中心北京理工大学材料学院北京 100081;
b 西安北方惠安化学工业有限公司西安 710302

投稿日期:2013-06-28 发布日期:2013-08-14
通讯作者: 邵自强 E-mail:shaoziqiang@263.net
基金资助:
受“十二五”国家科技支撑计划项目(No. 2011BAD23B04), 北京理工大学研究生科技创新基金(No. 3090012241302)和北方工业集团青年科技创新专项基金(No. QKCZ-BIT-04)资助.

Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)

Qiu Lei^a, Shao Ziqiang^a, Wang Jianquan^a, Zhang Dalun^a, Cao Jun^b

a Beijing Engineering Research Center of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081;
b Xi'An North Hui An Chemical Industries CO., LTD, Xi'An 710302

Received:2013-06-28 Published:2013-08-14
Supported by:
Project supported by the the National Science-technology support plan projects (No. 2011BAD23B04), special programs of graduate students' scientific and technological innovative activities of Beijing institute of technology (No. 3090012241302) and Youth Science and Technology Innovation Projects of North Chemical Industry CO., LTD (No. QKCZ-BIT-04).

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1. 羧甲基纤维素锂(CMC-Li)的合成流变和静电纺丝功能化材料研究.PDF(90KB)

摘要/Abstract

对离子型纤维素醚静电纺丝研究依旧是当前研究的难点. 研究表明, 成功合成新的离子型纤维素醚CMC-Li, 并对比羧甲基纤维钠(CMC-Na)进行流变测试, 两者都表现出非牛顿流体的特性, 且取代度和黏度相近的CMC-Li比CMC-Na具有更低的非牛顿指数, 对于同类物质低取代度、高浓度的溶液表现出更低的非牛顿指数. 并针对聚合物的结构特点, 易与水溶性端羟基高分子量的聚环氧乙烷(PEO)配成静电纺丝优良共纺溶液, 当速率为4 mL/h, 电压为25 kV, 纺丝距离为12 cm时能得到外观形貌较好的平均直径为70 nm左右的纳米纤维. CMC-Li具有更好的纺丝性能, 对CMC-Li包覆碳化功能化复合材料研究进行初步的探讨. 通过使用红外(IR)、流变仪、扫描电镜(SEM)分析取得较好的效果.

关键词: 静电纺丝, 纤维素及其衍生物, 流变性能, CMC-Li, 功能材料

The study on electrospinning of natural polysaccharide polymer to be nano-crystallized is still difficult in the current time. Carboxymethyl cellulose sodium (CMC-Na) was successfully synthesized and acidized to obtain carboxymethyl cellulose hydrogen (CMC-H), and new ionic cellulose ether CMC-Li was synthesized by alkalization, and then we analyzed the difference of structure between the three products. By comparing the rheological measurement and analysis of CMC-Na and CMC-Li, which have different mass fractions, it is found that they both show the characteristics of non-Newtonian fluid. The non-Newtonian index of CMC-Li is lower than that of CMC-Na when the degree of substitution (DS) and viscosity of both is similar. For the same material, the ionic cellulose ether solution of lower DS and higher concentration shows the lower non-Newtonian index. For the structure and property characteristic of polymers, it was easy to combine them with water-soluble hydroxyl terminated high molecular weight polyethylene oxide (PEO) to allocate the excellent electrospinning solution. Processing conditions were adjusted to a flow rate of 4 mL/h, an applied voltage of 25 kV, the spinning distance of 12 cm, the better appearance of nanofibers whose average diameter is about 70 nm can be obtained. In the process of electrospinning, hydroxyl lithium ester enolates was obtained by reductive reaction of the ionized Li⁺ with active hydroxyl, which caused the molecular structure to be destroyed. CMC-Li showed the exceptional Non-Newtonian fluid properties and had the better spinning performance than CMC-Na. When the surface tension of liquid was damaged by external electric force of spinning voltage to balance each other, the obtained morphology of the fiber was better. Nano-aluminum powder is coated with CMC-Li to form composite nanofibers, and carbonized at the high temperatures. Al/CNF/Li composite fiber was obtained in which nano particles were uniformly distributed. We preliminarily studied the obtained composite material that remained morphology and structure of fiber, which lays the foundation for the later research that the material is applied to soluble membrane, tissue engineering scaffolds, biological medicine, lithium battery and super capacitor, etc. The satisfactory effects have been achieved through analysis of IR, Rheology and SEM. The paper expands the type of polysaccharide polymer that can be electrospun and filled the void of related research, and it also lays the foundation for the study on nano functional materials of new ionic cellulose ether.

Key words: electrospinning, cellulose and its derivatives, rheological properties, CMC-Li, functional materials

引用此文

邱磊, 邵自强, 王建全, 张大伦, 曹军. 羧甲基纤维素锂(CMC-Li)的合成流变和静电纺丝功能化材料研究[J]. 化学学报, 2013, 71(11): 1521-1526.

Qiu Lei, Shao Ziqiang, Wang Jianquan, Zhang Dalun, Cao Jun. Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)[J]. Acta Chimica Sinica, 2013, 71(11): 1521-1526.

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羧甲基纤维素锂(CMC-Li)的合成流变和静电纺丝功能化材料研究

Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)

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