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Preparation and characterization of high strength and high modulus PVA fiber via dry-wet spinning with cross-linking of boric acid
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-19 , DOI: 10.1002/app.51394 Xinqiu Hong 1, 2 , Junwei He 3 , Liming Zou 1 , Yanli Wang 1 , Yan Vivian Li 4
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-19 , DOI: 10.1002/app.51394 Xinqiu Hong 1, 2 , Junwei He 3 , Liming Zou 1 , Yanli Wang 1 , Yan Vivian Li 4
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To improve the mechanical properties of polyvinyl alcohol (PVA) fibers, a series of PVA fibers were prepared via dry-wet spinning with cross-linking of boric acid (BA) (PVA/BA fibers), and using the mixed solvent of dimethyl sulfoxide and water. Moreover, the final PVA/BA fibers were characterized by Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), differential scanning calorimetery (DSC), thermogravimetric analyzer (TGA), powder X-ray diffraction (XRD) and yarn strength tester. Furthermore, with the increasing of BA content, FTIR analysis showed that the degree of crosslinking of BA with PVA increased. SEM images of final PVA/BA fibers presented smooth surfaces, and the diameters decreased firstly and then increased. DSC, TGA, and XRD analysis indicated that the melting temperatures, thermal properties and crystallinities first increased and then decreased with the increasing of BA content. In addition, mechanical properties measurements illustrated that the cross-linking existed at an optimal BA content of 0.3 wt%, and PVA/BA-0.3 fiber had the highest tensile strength and Young's modulus of 13.1 ± 0.4 and 360.2 ± 10.4 cN/dtex, respectively.
中文翻译：
硼酸交联干湿纺高强高模PVA纤维的制备及表征
为提高聚乙烯醇（PVA）纤维的力学性能，采用硼酸（BA）交联干湿法纺丝法制备了一系列PVA纤维（PVA/BA纤维），并使用二甲亚砜的混合溶剂。和水。此外，最终的 PVA/BA 纤维通过傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM)、差示扫描量热法 (DSC)、热重分析仪 (TGA)、粉末 X 射线衍射 (XRD) 和纱线强度进行表征测试员。此外，随着BA含量的增加，FTIR分析表明BA与PVA的交联度增加。最终 PVA/BA 纤维的 SEM 图像呈现出光滑的表面，且直径先减小后增大。DSC、TGA 和 XRD 分析表明，熔融温度、热性能和结晶度随着 BA 含量的增加先升高后降低。此外，机械性能测量表明交联存在于 0.3 wt% 的最佳 BA 含量，PVA/BA-0.3 纤维具有最高的拉伸强度和杨氏模量，分别为 13.1 ± 0.4 和 360.2 ± 10.4 cN/dtex，分别。
更新日期：2021-09-09
中文翻译：
硼酸交联干湿纺高强高模PVA纤维的制备及表征
为提高聚乙烯醇（PVA）纤维的力学性能，采用硼酸（BA）交联干湿法纺丝法制备了一系列PVA纤维（PVA/BA纤维），并使用二甲亚砜的混合溶剂。和水。此外，最终的 PVA/BA 纤维通过傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM)、差示扫描量热法 (DSC)、热重分析仪 (TGA)、粉末 X 射线衍射 (XRD) 和纱线强度进行表征测试员。此外，随着BA含量的增加，FTIR分析表明BA与PVA的交联度增加。最终 PVA/BA 纤维的 SEM 图像呈现出光滑的表面，且直径先减小后增大。DSC、TGA 和 XRD 分析表明，熔融温度、热性能和结晶度随着 BA 含量的增加先升高后降低。此外，机械性能测量表明交联存在于 0.3 wt% 的最佳 BA 含量，PVA/BA-0.3 纤维具有最高的拉伸强度和杨氏模量，分别为 13.1 ± 0.4 和 360.2 ± 10.4 cN/dtex，分别。
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