溶液参数对静电纺丝PAN@PS复合纳米纤维形貌及结构的影响
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摘要
采用同轴静电纺丝技术,以聚丙烯腈(PAN)溶液为核层、聚苯乙烯(PS)溶液为壳层,制备了PAN@PS复合纳米纤维。研究了纺丝液浓度、溶剂种类对PAN@PS复合纳米纤维形貌和结构的影响。结果表明:PS/四氢呋喃(THF)作为壳层溶液的复合纳米纤维(PAN@PS/THF)可获得相界面清晰的同轴纤维。随PS纺丝液浓度的增加,纤维的直径先增大后有所减小,整体呈现递增的趋势,当PS/THF质量分数为20%时,纤维直径约为693 nm且表面光滑。而以质量分数为20%的PS/二甲基甲酰胺(DMF)为壳层溶液的复合纳米纤维(PAN@PS/DMF)直径有所增加且纤维表面凹凸不平,呈现双相连续的结构。因此,在静电纺丝过程中,可以通过改变纺丝液的参数来调节纤维的形貌和结构。
Polyacrylonitrile(PAN) and polystyrene(PS) composite nanofibers(PAN@PS) were fabricated via coaxial electrospinning technology with PAN solution as core and PS solution as shell. The effect of the concentration of the spinning solutions and properties of the solvents on the morphology and structure of PAN@PS composite nanofibers were investigated. The results reveal that the composite fibers of PAN@PS/tetrahydrofuran(THF) with PS/THF as the shell solution exhibit the coaxial structure with distinct phase interface. With the increase of the shell solution concentration,the diameters of these fibers increase first then fall,but overall appear a trend of increasing. The diameter of the fibers with smooth surface reaches about 693 nm when the mass fraction of PS/THF is 20%. Whereas the fibers of PAN@PS/dimethylformamide(DMF) with the mass fraction of PS/DMF of 20% present a two-phase continuous structure with uneven surface morphology,and the diameter of the fibers is larger than that of PAN@PS/THF. Therefore,the morphology and structure of the composite fibers can be controlled by varying the electrospinning solution parameters.
Polyacrylonitrile(PAN) and polystyrene(PS) composite nanofibers(PAN@PS) were fabricated via coaxial electrospinning technology with PAN solution as core and PS solution as shell. The effect of the concentration of the spinning solutions and properties of the solvents on the morphology and structure of PAN@PS composite nanofibers were investigated. The results reveal that the composite fibers of PAN@PS/tetrahydrofuran(THF) with PS/THF as the shell solution exhibit the coaxial structure with distinct phase interface. With the increase of the shell solution concentration,the diameters of these fibers increase first then fall,but overall appear a trend of increasing. The diameter of the fibers with smooth surface reaches about 693 nm when the mass fraction of PS/THF is 20%. Whereas the fibers of PAN@PS/dimethylformamide(DMF) with the mass fraction of PS/DMF of 20% present a two-phase continuous structure with uneven surface morphology,and the diameter of the fibers is larger than that of PAN@PS/THF. Therefore,the morphology and structure of the composite fibers can be controlled by varying the electrospinning solution parameters.
引文
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[2]Rafique J,Yu Jie,Yu Jiliang,et al.Electrospinning highly aligned long polymer nanofibers on large scale by using a tip collector[J].Appl Phys Let,2007,91(6):1-3.
[3]Smit E,Buttner U,Sanderson R D.Continuous yarns from electrospun fibers[J].Polymer,2005,46(8):2419-2423.
[4]Yoshioka T,Dersch R,Tsuji M,et al.Orientation analysis of individual electrospun PE nanofibers by transmission electron microscopy[J].Polymer,2010,51(11):2383-2389.
[5]Zhu Wendong,Chi Maoqiang,Gao Mu,et al.Controlled synthesis of titanium dioxide/molybdenum disulfide core-shell hybrid nanofibers with enhanced peroxidase-like activity for colorimetric detection of glutathione[J].J Colloid Interface Sci,2018,528:410-418.
[6]Le T H,Yang Ying,Yu Liu,et al.Polyimide-based porous hollow carbon nanofibers for supercapacitor electrode[J].J Appl Polym Sci,2016,133(19):43397-43403.
[7]Zhang Minxin,Chen Jiafu,Chen Bingjing,et al.Fabrication of polystyrene fibers with tunable co-axial hollow tubing structure for oil spill cleanup[J].Appl Surf Sci,2016,367:126-133.
[8]Megelski S,Stephens J,Chase D,et al.Micro-and nanostructured surface morphology on electrospun polymer fibers[J].Macromolecules,2002,35(22):8456-8466.
[9]Miyauchi Y,Ding Bin,Shiratori S.Fabrication of a silverragwort-leaf-like super-hydrophobic micro/nanoporous fibrous mat surface by electrospinning[J].Nanotechnology,2006,17(20):5151-5156.
[10]Ji Xuyuan,Yang Wenjing,Wang Ting,et al.Coaxially elecrtospun core/shell structured poly(L-lactide)acid/chitosan nanofibers for potential drug carrier in tissue engineering[J].J biomed nanotechnol,2013,9(10):1672-1678.
[11]孟庆华,向阳.傅里叶变换光谱仪用红外水平衰减全反射测试仪[J].光学精密工程,2007,15(10):1515-1519.
[12]Huan Siqi,Bai Long,Liu Guoxiang,et al.Electrospun nanofibrous composites of polystyrene and cellulose nanocrystals:manufacture and characterization[J].RSCAdv,2015,5(63):50756-50766.
[13]任晶,王书刚,李延春,等.AOPAN@PAN同轴纳米纤维的制备及吸附性能[J].高等学校化学学报,2018,39(4):825-831.
[14]Chaúque E F C,Dlamini L N,Adelodun A A,et al.Electrospun polyacrylonitrile nanofibers functionalized with EDTA for adsorption of ionic dyes[J].Phys Chem Earth Parts A/B/C,2017,100:201-211.
[15]李加深,盛京,原续波,等.XPS研究低温等离子体聚苯乙烯表面改性[J].高分子学报,2001(2):182-185.
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