改性条件对半导体Ni片上电纺丝沉积碳纳米纤维结构和性能的影响  

Effects of Modification Conditions on the Structure and Properties of Carbon Nanofibers Deposited by Electrospinning on Semiconductor Ni Chips

作　　者：洪晓艺[1] 翟东媛 HONG Xiaoyi;ZHAI Dongyuan(Department of Electronic Information,Xinxiang Vocational and Technical College,Xinxiang 453006,China;Department of Electronic Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]新乡职业技术学院电子信息系,新乡453006 [2]湖南大学电子信息工程系,长沙410082

出　　处：《真空科学与技术学报》2021年第6期576-580,共5页Chinese Journal of Vacuum Science and Technology

基　　金：湖南省自然科学基金青年基金项目(2019JJ50091)。

摘　　要：选择乙醇电纺丝工艺制备碳纳米纤维,优化了工艺条件,并制备得到结构均匀的碳纳米纤维。选择EP溶液与水蒸气作为碳纳米纤维的改性介质,分析不同方法对碳纳米纤维进行表面改性的差异性。研究结果表明:通过乙醇电纺丝方法制备碳纳米纤维的最优条件为:锂盐溶液质量分数为70%,镍片-电纺丝间距1.5 cm,烧制时间为9 min。通过电纺丝工艺制得了高碳含量的碳纳米纤维。通过DFT方法进行分析发现其孔径尺寸为9.2 nm,微孔与介孔的孔容依次为0.094与0.213,形成了大量的微孔与介孔。EP-CNFs、Na-CNFs与CNFs都跟水形成了均匀混合状态,未出现分层的情况,而Wc-CNFs混合液形成了澄清液,说明Wc-CNFs已出现沉降的情况。采用EP改性方法可以使EP活化基团和碳纳米纤维活性基团发生相互作用,增强碳纳米纤维表面极性,避免发生团聚,达到更稳定的分散状态。Carbon nanofibers were prepared by ethanol electrospinning process,and the process conditions were optimized.Carbon nanofibers with a uniform structure were prepared.EP solution and water vapor were selected as modification medium to analyze the difference in surface modification of carbon nanofibers by different methods.The results show that the optimal conditions for the preparation of carbon nanofibers by ethanol electrospinning are as follows:the mass fraction of tin salt solution is 70%,the distance between nickel sheet and electrospinning is 1.5 cm,and the firing time is 9 min.Carbon nanofibers with high carbon content were prepared by electrospinning under the normal condition of C73D1.5T9.Through DFT analysis,it is found that the pore size is 9.2 nm,and the pore volume of micropores and mesoporous are 0.094 and 0.213 respectively,forming a large number of micropores and mesoporous.EP-CNFs,Na-CNFs,and CNFs are uniformly mixed with water without stratification,while Wc-CNFs mixture forms a clarifying liquid,indicating that Wc-CNFs have settled.EP modification method can make EP activated group and carbon nanofiber active group interact,enhance the surface polarity of carbon nanofiber,avoid aggregation,and reach a more stable dispersion state.

关 键 词：乙醇电纺丝法 碳纳米纤维 表面改性 性能分析 

分 类 号：TQ127[化学工程—无机化工]