首页|改性碳纳米管接枝氯磺化间位芳纶纳米纤维膜的制备及性能研究

改性碳纳米管接枝氯磺化间位芳纶纳米纤维膜的制备及性能研究

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将多壁碳纳米管(Multi-Walled Carbon Nanotubes，MWCNTs)与间位芳纶(Meta-Aramid，PMIA)进行复合有利于增强PMIA力学性能，近年来已成为研究热点，但MWCNTs分散性差、结合力差还易脱落，限制了其应用。利用氨基改性碳纳米管(MWCNTs-NH2)，同时将PMIA进行氯磺化改性(PMIA-SO2Cl)，使 PMIA-SO2Cl 与 MWCNTs-NH2通过-SO2Cl与-NH2偶联在一起，并采用超声波辅助溶液共混的方法，制备MWCNTs-NH2/PMIA-SO2Cl悬浮液。采用静电纺丝法，制备MWCNTs-NH2/PMIA-SO2Cl纳米纤维膜。结果显示，PMIA-SO2Cl与MWCNTs-NH2的偶联作用明显增强了 MWCNTs在PMIA基体中的稳定性，与改性前相比，改性后悬浮液中MWCNTs分散更均匀，平均粒径更小。与 MWCNTs/PMIA 及 MWCNTs-COOH/PMIA 相比，改性后MWCNTs-NH2/PMIA-SO2Cl纳米纤维膜的力学性能与过滤性能均显著提高。
Study on preparation and properties of nanofiber membrane made of modified carbon nanotubes grafted with chlorosulfonated meta-aramid fiber
The application of carbon nanotubes is limited by their poor dispersion and bonding force with aramid fiber.In this paper,we modified carbon nanotubes and aramid fibers innovatively.We used ethanediamine to prepare amino-modified carbon nanotubes(MWCNTs-NH2).We used chlorosulfonic to prepare chlorosulfonated aramid fiber(PMIA-SO2Cl).We characterized samples before and after modification by FT-IR,XPS,and XRD.We used an ultrasonic dispersion method to prepare MWCNTs-NH2/PMIA-SO2Cl suspension and characterized suspension before and after modification by microscopic analysis and laser particle size analysis.We used an electrostatic spinning method to prepare MWCNTs-NH2/PMIA-SO2Cl nanofiber membrane,and characterized the filtering properties and mechanical properties of the nanofiber membranes before and after modification.The results indicate that functional groups are introduced by the condensation reaction of ethylenediamine with amino groups on the surface of carbon nanotubes.This method can not destroy the unique structure of carbon nanotubes.Besides,We can use chlorosulfonic acid with a mass fraction of 0.2％to introduce chlorosulfonyl group on the surface of aramid fiber.Chlorosulfonyl group can react with substances containing some active groups such as amino groups.As a result,carbon nanotubes are tightly bonded to the aramid fiber.The median size of MWCNTs after suspension modification is the smallest,only 198.03 nm.When the mass fraction of MWCNTs is 0.6％,the tensile strength of MWCNTs-NH2/PMIA-SO2Cl nanofiber membrane increases by 42.88％.The filtration efficiency of nanofiber membrane is 99.99％for fine particulate matter below 0.3 µm,the filtration resistance of nanofiber membrane is only 189 Pa and the filter quality factor of nanofiber membrane is up to 0.050 6.Compared with the unmodified nanofiber membranes,the mechanical property and filtering property of modified nanofiber membranes are significantly improved.Therefore,the coupling of-SO2Cl and-NH2 can enhance the stability of carbon nanotubes in aramid fiber and make the spinning solution of MWCNTs-NH2/PMIA-SO2Cl more evenly dispersed,being a feasible method and we can use it in the field of electrostatic spinning.

safety and hygiene engineering technologychclorosulfonationsurface-modifiedelectrospinningdispersitymechanical propertyfiltration performance

柳静献、王靓、孙立、田新娇、顾利定、贾瑞文

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东北大学资源与土木工程学院,沈阳 110819

洁华控股股份有限公司,浙江海宁 314419

浙江工业大学化学工程学院,杭州 310014

安全卫生工程技术 氯磺化 表面修饰 静电纺丝 分散性 力学性能 过滤性能

国家自然科学基金项目国家十三五重点专项国家十三五重点专项国家十三五重点专项辽宁省重点研发计划项目浙江省重点研发计划项目

521742152017YFC02118012016YFC02037012016YFC08016052019JH2/101000042020C03089

2024

10.13637/j.issn.1009-6094.2023.0352

安全与环境学报
北京理工大学 中国环境科学学会 中国职业安全健康协会

安全与环境学报

CSTPCD北大核心
影响因子：0.943
ISSN：1009-6094
年,卷(期)：2024.24(3)
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