摘要:
提出了采用线性回归处理分析玻纤与浸润液体动态润湿的新方法，结合高精度电子天平，表征了玻纤表面动态润湿性能。研究结果表明：在玻纤表面动态润湿过程中，随着润湿速度的增加，动态接触角有增大的趋势，玻纤与去离子水、乙二醇、760E环氧、CYD128环氧的接触角分别由66.04°、42.21°、51.31°、73.90°增加到69.05°、46.95°、74.58°、170.06°，玻纤表面可润湿性能下降。玻纤表面动态润湿过程中，黏度越大，随着润湿速度增加，可润湿性能下降越快，即玻纤与CYD128环氧体系的接触角下降96.16°，而与760E环氧树脂和乙二醇的接触角下降分别为23.27°和4.74°。基于新方法的玻纤表面动态润湿系统中，玻纤所受作用力随三相接触线移动速率和浸润液体黏度的增加而增大。
关键词:
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玻纤
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润湿
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动态
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速度
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接触角
Abstract:
A new method of analyzing the dynamic wetting of fiberglass with infiltration liquid by linear regression analysis was proposed. The dynamic wettability of fiberglass surface was characterized, combining the use of precision electronic balance. The results show that the dynamic contact angle has an increasing trend with the increase of wetting velocity during the dynamic wetting process of fiberglass. Precisely, the contact angle of fiberglass and deionized water, ethylene glycol, 760E epoxy, CYD128 epoxy can increase from 66.04°, 42.21°, 51.31°, 73.90° to 69.05°, 46.95°, 74.58°, 170.06°, respectively, while the wettability of the fiberglass decreases. When the wetting rate increases, the greater the viscosity is, the faster the wettability declines during the dynamic wetting process of fiberglass. That is, the contact angle of fiberglass and CYD128 epoxy decreases by 96.16°, whereas the figures for 760E epoxy resin and ethylene glycol are 23.27° and 4.74°, respectively. Based on the new method, the force applied against the fiberglass increases with the rise of the moving velocity of three-phase contact line and the viscosity of infiltration liquid in the dynamic wetting system.
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