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摘要
利用3,3′,4,4′-二苯甲酮四羧酸二酐(BTDA)和4,4′-二氨基二苯醚(ODA)合成得到聚酰胺酸(PAA)纺丝液,采用静电纺丝技术制备得到PAA纳米纤维,通过热亚胺化法获得BTDA-ODA型聚酰亚胺(PI)纳米纤维。用扫描电子显微镜(SEM)表征了热亚胺化前后纳米纤维的形貌特征,利用傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)和热重分析(TGA)表征了不同亚胺化温度对PI纳米纤维的化学结构、结晶性能和热稳定性的影响。结果表明,当亚胺化热处理温度较低时,PAA纳米纤维的亚胺化程度较差。当亚胺化温度达到300℃时,PAA纳米纤维的亚胺化程度基本完全。随着亚胺化温度的升高,纳米纤维的结晶度逐渐增强,热稳定性也逐渐升高。
Abstract
The polyamic acid (PAA) solution was synthesized from 3,3′,4,4′-benzophenonetetracarboxylic acid dianhydride(BTDA)and 4,4′-diaminodiphenylether(ODA) in dimethylformamide(DMF).The polyimide nanofibers were obtained from PAA electrospining through thermal imidization.The morphology of PAA nanofiber and PI nanofiber were characterized by scanning electron microscope (SEM).Their chemical structure,crystallization properties and the thermal stability were tested by fourier transform infrared spectroscopy (FT-IR),X-ray diffraction (XRD) and thermal gavimetry analysis (TGA),respectively.Results showed that when the imidization of PAA nanofibersis was poorer at low temperature but completed When the imidization temperature at 300℃.With the increase of imidization temperature,the crystallinity of nanofibers was increased and their thermal stability was also increased.
关键词
静电纺丝
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聚酰亚胺
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热亚胺化
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纳米纤维
Key words
electrospinning
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polyimide
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thermal imidization
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nanofiber
亚胺化温度对聚酰亚胺纳米纤维结构和性能的影响[J].
化工新型材料, 2017, 45(9): 153-155 DOI:
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基金资助
常州纺织服装职业技术学院应用类院级科研课题(CFK201218)
