竹浆纤维素纳米纤维对硝化纤维素膜的增强作用 |
| |
引用本文: | 周逸,魏洁,吕妍妍,樊浩瑜,吴雪,赵利斌,张仁旭,邵自强. 竹浆纤维素纳米纤维对硝化纤维素膜的增强作用[J]. 含能材料, 2019, 27(8): 671-678 |
| |
作者姓名: | 周逸 魏洁 吕妍妍 樊浩瑜 吴雪 赵利斌 张仁旭 邵自强 |
| |
作者单位: | 北京理工大学 北京市纤维素及其衍生材料工程技术研究中心,北京,100081;四川北方硝化棉股份有限公司,四川 泸州,646605 |
| |
基金项目: | 中国兵器北方化学工业集团公司青年科技创新专项 QKCZ-mp-2015-08;湖北省技术创新专项 2016AAA037中国兵器北方化学工业集团公司青年科技创新专项(QKCZ-mp-2015-08);湖北省技术创新专项(2016AAA037) |
| |
摘 要: | 为获得力学性能更好的硝化纤维素膜材料,对竹浆进行2,2,6,6-四甲基哌啶-1-氧基自由基(TEMPO)选择性催化氧化-超声处理,得到直径纳米级、长度微米级的纤维素纳米纤维(cellulose nanofibrils,CNFs)。采用N,N-二甲基甲酰胺(DMF)或DMF/H2O混合溶剂作分散剂,先后将硝化纤维素与酸化和未酸化的CNFs进行充分混合,在不同的分散剂条件下制备出CNFs增强的硝化纤维素膜,采用透射电镜(TEM)、热重(TG)、力学拉伸试验、动态力学热分析(DMTA)等测试表征了CNFs形态尺寸以及CNFs增强的硝化纤维素膜力学性能变化规律。结果表明,CNFs的直径为5~10 nm,长度为500~3000 nm;酸化与未酸化的CNFs在DMF中分散性均好于丙酮溶液;在DMF/H2O分散体系中水的体积分数达到20%时出现了CNFs团聚;在DMF分散剂体系中,加入酸化的CNFs制备出的复合膜拉伸强度为52.0 MPa,断裂伸长率为10.4%,显著高于空白样(36.6 MPa,8.4%)。
|
关 键 词: | 纤维素纳米纤维(CNFs) 硝化纤维素(NC) 复合膜增强 |
收稿时间: | 2018-08-28 |
修稿时间: | 2019-01-20 |
Enhancement of Nitrocellulose Membrane by Bamboo Pulp Cellulose Nanofiber |
| |
Abstract: | To obtain a nitrocellulose membrane with enhanced mechanical properties, cellulose nanofibrils(CNFs) with nanometer-diameter and micron-length were obtained by 2,2,6,6-tetramethylpiperidine-1-oxyl(TEMPO) oxidation-sonication treatment of bamboo pulp. The N,N-dimethylformamide(DMF) and DMF/H2O mixed solvent were used as dispersing agent. And the nitrocellulose was thoroughly mixed with the acidified or unacidified CNFs. CNFs-enhanced nitrocellulose membranes were prepared under different dispersion conditions. In addition, the morphological dimensions of CNFs and the change rule of mechanical properties of CNFs-enhanced nitrocellulose membranes were characterized by transmission electron microscope(TEM), thermogravimetric Analysis(TG), mechanical tensile test and dynamic mechanical thermal analysis(DMTA). Results shows that the diameter and length of CNFs are 5-10 nm and 500-3000 nm, respectively. The acidified and unacidified CNFs have better dispersity in DMF than in acetone. The agglomeration of CNFs occurs when the volume fraction of water in DMF/H2O reaches 20%. Using DMF as a dispersant, the tensile strength and tensile elongation of the composite membrane prepared by adding acidified CNFs are 52.0 MPa and 10.4% respectively, significantly higher than those of the blank sample (36.6 MPa, 8.4%). |
| |
Keywords: | cellulose nanofiber(CNFs) nitrocellulose (NC) composite membrane reinforcement |
本文献已被 CNKI 万方数据 等数据库收录! |
| 点击此处可从《含能材料》浏览原始摘要信息 |
|
点击此处可从《含能材料》下载全文 |
|