芳纶Ⅲ增强浆料的制备及性能
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摘要
使用水溶性环氧树脂(PAEK)和热塑性聚丙烯酰胺(APAM)的复配浆料对芳纶Ⅲ纤维进行改性处理,探讨了浆料的贮存稳定性、离心稳定性、表面张力、黏度和粒度,进而研究了浆料浓度对纤维强度的影响,并通过场发射扫描电子显微镜(SEM)、傅里叶变换红外光谱(ATR-FT-IR)和X射线光电子能谱(XPS)对上浆后纤维表面形貌和化学组成进行表征。结果表明,制备的浆料粒径小、分散均匀,具有良好的稳定性。SEM、XPS、ATR-FT-IR测试表明上浆后芳纶Ⅲ纤维表面变得粗糙,而且纤维表面极性官能团含量增加;与未经处理的芳纶Ⅲ相比,当上浆浓度为3%时,芳纶Ⅲ单丝拉伸强度提高了7.95%,束丝拉伸断裂强度提高了14.16%。
Aramid Ⅲ fibers were modified with a mixture of water-soluble epoxy resin(PAEK) and thermoplastic polyacrylamide(APAM) to investigate the storage stability, centrifugal stability, surface tension, viscosity and particle size of the slurry. And the surface functional groups of the slurry were analyzed, and then studied the effect of slurry concentration on the fiber strength. Through SEM, ATR-FT-IR, X-ray and XPS, the surface morphology and chemical composition of fibers after sizing were characterized. The results show that the prepared slurry has a small particle size, uniform dispersion and good stability. SEM, XPS, and ATR-FT-IR measurements show that the surface of aramid Ⅲ fibers becomes rough after sizing, and the number of polar functional groups on the surface of fibers increases; when the sizing concentration is 3%, compared with the untreated aramid Ⅲ, the tensile strength of aramid Ⅲ monofilament increases by 7.95%, and the tensile strength of bundle filaments is increased by 14.16%.
Aramid Ⅲ fibers were modified with a mixture of water-soluble epoxy resin(PAEK) and thermoplastic polyacrylamide(APAM) to investigate the storage stability, centrifugal stability, surface tension, viscosity and particle size of the slurry. And the surface functional groups of the slurry were analyzed, and then studied the effect of slurry concentration on the fiber strength. Through SEM, ATR-FT-IR, X-ray and XPS, the surface morphology and chemical composition of fibers after sizing were characterized. The results show that the prepared slurry has a small particle size, uniform dispersion and good stability. SEM, XPS, and ATR-FT-IR measurements show that the surface of aramid Ⅲ fibers becomes rough after sizing, and the number of polar functional groups on the surface of fibers increases; when the sizing concentration is 3%, compared with the untreated aramid Ⅲ, the tensile strength of aramid Ⅲ monofilament increases by 7.95%, and the tensile strength of bundle filaments is increased by 14.16%.
引文
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[2] Luo L,Wang Y,Huang J,et al.Pre-drawing induced evolution of phase,microstructure and property in para-aramid fibers containing benzimidazole moiety[J].RSC Adv.,2016,6:62695-62704.
[3] Sa R,Yan Y,Wei Z,et al.Surface modification of aramid fibers by bio-inspired poly(dopamine) and epoxy functionalized silane grafting[J].ACS Appl.Mater.Interfaces,2014,6:21730-21738.
[4] Zhang T,Zhao Y,Li H,et al.Effect of polyurethane sizing on carbon fibers surface and interfacial adhesion of fiber/polyamide 6 composites[J].J.Appl.Polym.Sci.,2018,16:1-10.
[5] Zhou L,Yuan L,Guan Q,et al.Building unique surface structure on aramid fibers through a green layer-by-layer self-assembly technique to develop new high performance fibers with greatly improved surface activity,thermal resistance,mechanical properties and UV resistance[J].Appl.Surf.Sci.,2017,411:34-35.
[6] Liu T M,Zheng Y S,Hu J.Retracted article:surface modification of aramid fibers with novel chemical approach[J].Polym.Bull.,2011,66:259-275.
[7] Sa R,Yan Y,Wei Z,et al.Surface modification of aramid fibers by bio-inspired poly (dopamine) and epoxy functionalized silane grafting[J].ACS Appl.Mater.Interfaces,2014,6:21730-21738.
[8] Jia C,Chen P,Liu W,et al.Surface treatment of aramid fiber by air dielectric barrier discharge plasma at atmospheric pressure[J].Appl.Surf.Sci.,2011,257:4165-4170.
[9] Zhang Y H,Huang Y D,Liu L,et al.Effects of γ-ray radiation grafting on aramid fibers and its composites[J].Appl.Surf.Sci.,2008,254:3153-3161.
[10] Thomason J L.Investigation of composite interphase using dynamic mechanical analysis:artifacts and reality[J].Polym.Compos.,2010,11:105-113.
[11] Chen J,Zhu Y,Ni Q,et al.Surface modification and characterization of aramid fibers with hybrid coating[J].Appl.Surf.Sci.,2014,321:103-108.
[12] Hussain S,Yorucu C,Ahmed I,et al.Surface modification of aramid fibers by graphene oxide nano-sheets for multiscale polymer composites[J].Surf.Coat.Technol.,2014,258:458-466.