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- 검색키워드
- 저자 : Xueyan Mu (검색결과 2 건)
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Qijian Niu,Xueyan Mu,Jun Nie,Guiping Ma 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.38 No.-
Fluoride compounds could migrate to the surface in a blending solution because of their low surfaceenergy. In order to prepare a photo-sensitive nanofiber, a diphenyl-ketone photoinitiator with afluorinated aliphatic chain was synthesized, and its structure was characterized using 1H NMR and 19FNMR, UV–vis absorbance spectroscopy, and fourier transform infrared (FT-IR). A blending solution ofpolyacrylonitrile (PAN) and photoinitiator containing fluorine with dimethylformamide (DMF) as thesolvent was electrospun to prepare a photo-sensitive nanofiber. The photo-sensitive nanofiber was usedto fabricate a polymer brush grafted on the nanofiber by initiating the polymerization of tripropyleneglycol diacrylate (TPGDA) and hydroxyethyl acrylate (HEA) monomers via UV irradiation. Thedistribution of the photoinitiator on the surface of the nanofibers before and after photopolymerizationwas measured using UV–vis absorbance spectroscopy. The kinetics of the photopolymerization of TPGDAand HEA monomers on the surface of the nanofibers was studied using real-time infrared spectroscopy(RT-IR). The size and morphology of the nanofibers were investigated using scanning electronmicroscopy (SEM). The internal core–shell structure and the surface composition of nanofibers werefurther studied using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS),and attenuated total reflectance-infrared spectroscopy (ATR-IR). It was suggested that the photoinitiatoron the nanofiber surface could cause the polymerization of the TPGDA and HEA monomers under UVirradiation. The solubility of the nanofibers polymerized with TPGDA on the surface was alsoinvestigated in water, DMF and acetone. The experimental results indicated that the nanofiber wasenriched with the photoinitiator on its surface and that the nanofiber had potential for application in thepreparation of functional core–shell nanofibers.
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Qijian Niu,Lingwang Zeng,Xueyan Mu,Jun Nie,Guiping Ma 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
The objective of this work is to demonstrate the feasibility of preparation of core-shell nanofibers byelectrospinning combined with in situ UV photopolymerization. The thiol-ene monomer with Si atomand the initiator can migrate to the surface with the evaporation of the solvent during the process ofelectrospinning, which caused phase separation due to the great migration ability of small molecule andlow surface energy. Then photo induced polymerization and cross-linking reaction took placesimultaneously during the electrospinning process, which formed shell of the nanofibers. Themorphology and structure of electrospun nanofibers were investigated by SEM and TEM. Thecomposition of the shell layer was determined by ATR-IR and XPS. Moreover, the nanofiber mats weretested by WCA test, and the hydrophobic ability of PVP nanofibers was improved because of theprotection of the shell layer with Si atom. The most important thing is that the technology whichcombined electrospinning with in situ photopolymerization provides a simple method for preparation ofcore-shell nanofibers.
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