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来自黄麻纤维的纳米纤维素及其与天然橡胶的纳米复合材料:制备与表征。

Nanocelluloses from jute fibers and their nanocomposites with natural rubber: Preparation and characterization.

作者信息

Thomas Martin George, Abraham Eldho, Jyotishkumar P, Maria Hanna J, Pothen Laly A, Thomas Sabu

机构信息

Department of Polymer Science and Rubber Technology, CUSAT, Kerala, India.

Research Department of Chemistry, CMS College, Kottayam 690 110, Kerala, India; R.H. Smith Institute of Plant Sciences and Genetics, Hebrew University of Jerusalem, 76100, Israel.

出版信息

Int J Biol Macromol. 2015 Nov;81:768-77. doi: 10.1016/j.ijbiomac.2015.08.053. Epub 2015 Aug 28.

Abstract

Nanocellulose fibers having an average diameter of 50nm were isolated from raw jute fibers by steam explosion process. The isolation of nanocellulose from jute fibers by this extraction process is proved by SEM, XRD, FTIR, birefringence and TEM characterizations. This nanocellulose was used as the reinforcing agent in natural rubber (NR) latex along with crosslinking agents to prepare crosslinked nanocomposite films. The effects of nanocellulose loading on the morphology and mechanics of the nanocomposites have been carefully analyzed. Significant improvements in the Young's modulus and tensile strength of the nanocomposite were observed because of the reinforcing ability of the nanocellulose in the rubber matrix. A mechanism is suggested for the formation of the Zn-cellulose complex. The three-dimensional network of cellulose nanofibers (cellulose/cellulose network and Zn/cellulose network) in the NR matrix plays a major role in improving the properties of the crosslinked nanocomposites.

摘要

通过蒸汽爆破工艺从生黄麻纤维中分离出平均直径为50nm的纳米纤维素纤维。通过扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、双折射和透射电子显微镜(TEM)表征证明了通过该提取工艺从黄麻纤维中分离出纳米纤维素。这种纳米纤维素与交联剂一起用作天然橡胶(NR)胶乳中的增强剂,以制备交联纳米复合薄膜。仔细分析了纳米纤维素负载量对纳米复合材料形态和力学性能的影响。由于纳米纤维素在橡胶基质中的增强能力,观察到纳米复合材料的杨氏模量和拉伸强度有显著提高。提出了锌 - 纤维素络合物形成的机理。NR基质中纤维素纳米纤维的三维网络(纤维素/纤维素网络和锌/纤维素网络)在改善交联纳米复合材料的性能方面起主要作用。

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