Polyimide(PI) nanofiber films were fabricated via high voltage electrospinning technology.Firstly,the precursor of PI,poly (amic acid) (PAA) solution was synthesized via low-temperature solution polycondensation,and PAA nanofiber film was prepared by electrospinning.Then the PI nanofiber film was obtained by thermal imidization.The effects of solid content of PAA,applied voltage,receiving distance and injection speed on the morphology of the nanofiber film were studied.Its chemical structure and crystallization were characterized by fourier transform infrared spectrometer and X-ray diffractometer,and its morphology was characterized by scanning electron microscope (SEM).The results showed that reasonable process parameters were 15wt% (solid content of PAA),16kV (applied voltage),21cm (receiving distance),and 0.01mm/min (injection speed).The injection speed of PAA solution had a significant impact on the electrospinning effect.
[1] Dhara M G,Banerjee S.Fluorinated high-performance polymers:poly(arylene ether)s and aromatic polyimides containing trifluoromethyl groups[J].Progress in Polymer Science,2010,35(8):1022-1077.
[2] 陈志平,黄孙息,朱恒斌,等.聚酰亚胺在锂电池隔膜领域的研究进展[J].绝缘材料,2018,51(4):1-5.
[3] Liu L,Lv F,Li P,et al.Preparation of ultra-low dielectric constant silica/polyimide nanofiber membranes by electrospinning[J].Composites Part A:Applied Science and Manufacturing,2016,84:292-298.
[4] Zhang P F,Huang H,Wang S Y.Research and manufacture of thermoplastic polyimide engineering plastics[J].Advanced Materials Research,2012,550-553:877-881.
[5] García C,Bollero A,Friedrich E J,et al.Molybdenum-coated hybrid polyimide composites as back contact layers for flexible solar cells[J].Journal of Physics & Chemistry of Solids,2013,74(5):702-707.
[6] Yan X,Zhang M,Qi S,et al.A high-performance aromatic co-polyimide fiber:structure and property relationship during gradient thermal annealing[J].Journal of Materials Science,2017,53(3):1-15.
[7] 王旋.静电纺聚偏氟乙烯纳米纤维膜压电性能研究[D].上海:东华大学,2015.
[8] Ma J,Zhang Q,Lin K,et al.Piezoelectric and optoelectronic properties of electrospinning hybrid PVDF and ZnO nanofibers[J].Materials Research Express,2018,Doi:10.1088/2053-1591/aab747.
[9] Ma W,Guo Z,Zhao J,et al.Polyimide/cellulose acetate core/shell electrospun fibrous membranes for oil-water separation[J].Separation & Purification Technology,2017,177:71-85.
[10] 姚春梅,黄锋林,魏取福,等.静电纺聚乳酸纳米纤维复合滤料的过滤性能研究[J].化工新型材料,2012,40(4):122-124.
[11] Amoroso N J,D'Amore A,Hong Y,et al.Elastomeric electrospun polyurethane scaffolds:the interrelationship between fabrication conditions,fiber topology,and mechanical properties[J].Advanced Materials,2011,23(1):106-111.
[12] 王婧.聚乙烯吡咯烷酮(PVP)-碘(I2)复合纳米纤维材料的制备与表征[D].长春:东北师范大学,2010.
[13] He T,Wang J,Huang P,et al.Electrospinning polyvinylidene fluoride fibrous membranes containing anti-bacterial drugs used as wound dressing[J].Colloids Surf B Biointerfaces,2015,130:278-286.
[14] 王闻宇,朱承章,金欣,等.静电纺淀粉/PVA纳米纤维的制备及其交联改性研究[J].合成纤维工业,2017,40(3):1-5.
[15] Ma X,Kolla P,Yang R,et al.Electrospun polyacrylonitrile nanofibrous membranes with varied fiber diameters and different membrane porosities as lithium-ion battery separators[J].Electrochimica Acta,2017,236:417-423.
[16] 孙宁.聚丙烯腈/碳纳米管复合纳米纤维膜的制备与性能研究[D].青岛:青岛大学,2008.
[17] Luo C,Wang X,Wang J,et al.One-pot preparation of polyimide/Fe3O4 magnetic nanofibers with solvent resistant properties[J].Composites Science and Technology,2016,133:97-103.
[18] 柯洋丽,彭夏,高雯雯.静电纺丝制备多壁碳纳米管/聚酰亚胺复合纤维膜[J].分析仪器,2017(3):83-87.
[19] Ree M,Han H,Gryte C C.Water sorption in thin films of high-temperature polyimides:the effect of imidization history[J].High Performance Polymers,1994,6(4):321-334.
[20] 丁孟贤,何天白.聚酰亚胺新型材料[M].北京:科学出版社,1998,12-13.
