CAJ | 학술논문

对位芳纶沉析纤维是近年来新开发的一种对位芳纶差异化产品，因其具备良好的湿加工性和复合效果，故作为复合增强材料得以广泛应用。为了解这种新型纤维的本体结构特性以及其在纸基复合材料中的应用情况，本文采用LM 、SEM 等表征了该纤维的表观形貌，通过Morfi Compact分析了其形态参数，并利用FT‐IR、XRD等研究了其结构特性，运用压汞仪、T G‐DSC等探讨了沉析纤维对纸基复合材料性能的影响。结果表明：相对于浆粕纤维，沉析纤维呈非刚性的皱膜状或薄片状，形态柔顺，质轻且较薄，比表面积较大，在水介质中分散性良好；纤维的长度较小且分布集中，细碎化程度高，有利于提高其复合材料的匀度和强度；纤维具有聚酰胺结构，其氢键结合程度偏低，呈现出明显的无定形态结构；由于沉析纤维独特的形态特性，用其配抄所得纸基复合材料结构紧凑，孔隙较少，机械强度、绝缘性能以及热学稳定性等均有明显提高，说明对位芳纶沉析纤维作为芳纶纸基复合材料具有良好的性能。
대위방륜침석섬유시근년래신개발적일충대위방륜차이화산품，인기구비량호적습가공성화복합효과，고작위복합증강재료득이엄범응용。위료해저충신형섬유적본체결구특성이급기재지기복합재료중적응용정황，본문채용LM 、SEM 등표정료해섬유적표관형모，통과Morfi Compact분석료기형태삼수，병이용FT‐IR、XRD등연구료기결구특성，운용압홍의、T G‐DSC등탐토료침석섬유대지기복합재료성능적영향。결과표명：상대우장박섬유，침석섬유정비강성적추막상혹박편상，형태유순，질경차교박，비표면적교대，재수개질중분산성량호；섬유적장도교소차분포집중，세쇄화정도고，유리우제고기복합재료적균도화강도；섬유구유취선알결구，기경건결합정도편저，정현출명현적무정형태결구；유우침석섬유독특적형태특성，용기배초소득지기복합재료결구긴주，공극교소，궤계강도、절연성능이급열학은정성등균유명현제고，설명대위방륜침석섬유작위방륜지기복합재료구유량호적성능。
Poly (para‐phenylene terephthalamide) fibrid is a new PPT A differentiated product developed in recent years ,and it can be used as composite reinforcement materials since it has good wet processing and compounding effects .In order to investigate the structure and properties of this new fiber and its application in paper based composite ,LM and SEM were used to characterize its apparent morphology ,Morfi Compact was used to analyze its morpho‐logical parameters ,FT‐IR and XRD were used to study its structural properties ,and the mer‐cury analyzer and TG‐DSC were used to reveal the effects of fibrids on the properties of paper based composites .The results show that fibrids appear like non‐rigid wrinkle film or sheetrelative to pulp ,its morphology is flexible and it has a larger specific surface area as it is light and thin ,besides it has a good dispersibility in an aqueous medium .Fibrid has a smaller length and distributes centralizedly ,and its high degree of fragmentation is conducive to the uniformity and strength of its composite materials .Fibrid has polyamide structure and it has low hydrogen bonding degree and obvious amorphous structure .Due to its unique morpho‐logical characteristics ,PPTA paper based composite which is made of chopped fiber and fibrids has compact structure and less porosity ,besides the mechanical strength ,insulation performance and thermal stability of this kind paper increase obviously ,indicating that fibrids can be used as aramid paper based composite materials with excellent performance .