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首页> 外文期刊>Journal of Applied Polymer Science >Effect of electrochemical treatment on pull-out properties of 73/27 HBA/HNA copolyester fibers in thermosetting matrix
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Effect of electrochemical treatment on pull-out properties of 73/27 HBA/HNA copolyester fibers in thermosetting matrix

机译：电化学处理对73/27 HBA / HNA共聚酯纤维在热固性基质中拉出性能的影响

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摘要

The surface of high-strength 73/27 HBA/HNA fibers was electrochemically modified in aqueous sodium hydroxide solution (10 wt %) with the change of the applied current to improve the interfacial shear strength (IFSS) of the fiber in the thermosetting matrix. A sodium component was identified on the surface of the treated fibers by scanning electron microscopy (SEM). The detection of sodium is best interpreted as the existence of a negative charged functional group (-COO~-Na~+) on the surface of the treated fibers. A pull-out test was used to measure the IFSS of the HBA/HNA fibers and epoxy/amine cure system. According to the calculating value from Greszczuk's geometrical model, the IFSS increased with the applied current in the range of 50-450 mA. However, no further increase in the IFSS was observed for strong treatment (1500 mA). There was an optimum by applied current to obtain maximum IFSS. The electrochemical treatment of the 73/27 HBA/HNA copolyester fibers was effective in altering their surface chemistry and improving the interfacial adhesion at the moderate treating conditions.
机译：通过改变施加电流，在氢氧化钠水溶液（10 wt％）中对高强度73/27 HBA / HNA纤维的表面进行电化学改性，以改善热固性基质中纤维的界面剪切强度（IFSS）。通过扫描电子显微镜（SEM）在处理过的纤维的表面上鉴定出钠成分。最好将钠的检测解释为在处理过的纤维表面上存在带负电的官能团（-COO〜-Na〜+）。使用拉出测试来测量HBA / HNA纤维和环氧树脂/胺固化系统的IFSS。根据Greszczuk几何模型的计算值，IFSS随着施加的电流在50-450 mA范围内而增加。但是，对于强处理（1500 mA），未观察到IFSS的进一步增加。有一个最佳的外加电流以获得最大的IFSS。在适度的处理条件下，对73/27 HBA / HNA共聚酯纤维进行电化学处理可有效改变其表面化学性质并改善界面粘合力。

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