Improving the adhesion of poly(ethylene terephthalate) fibers to poly(hydroxyethyl methacrylate) hydrogels by ozone treatment: Surface characterization and pull-out tests
Improving the adhesion of poly(ethylene terephthalate) fibers to poly(hydroxyethyl methacrylate) hydrogels by ozone treatment: Surface characterization and pull-out tests
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通过臭氧处理提高聚对苯二甲酸乙二醇酯纤维与聚甲基丙烯酸羟乙酯水凝胶的粘合力：表面表征和拉拔测试
DOI：
10.1016/j.polymer.2005.08.033
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发表时间：
2005
期刊：
影响因子：
4.6
通讯作者：
M. Barbosa
中科院分区：
文献类型：
--
作者：
L. Ferreira;Marta B. Evangelista;M. Martins;P. Granja;J. Esteves;M. Barbosa
本文报道了一种通过臭氧处理聚对苯二甲酸乙二醇酯（PET）纤维来提高PET纤维与聚甲基丙烯酸羟乙酯（pHEMA）水凝胶之间的粘合力的方法。通过水接触角测量、X射线光电子能谱（XPS）、红外反射吸收光谱（IRAS）和衰减全反射红外光谱（ATR-IR）研究了PET的表面化学性质，得到了0.6μm以下深度的化学官能团信息。臭氧处理通过氧化和断链在PET表面引入几个极性基团，从而增加润湿性。这些基团主要包括羧基和酸酐基团以及少量羟基。原子力显微镜（AFM）分析表明，臭氧处理的PET薄膜的表面完全覆盖着球形颗粒，这些颗粒在用水洗涤薄膜后被去除。在洗涤步骤中，羧基官能团被优先除去，如XPS和IR分析所示。根据拔出测试，PET单丝和束处理的臭氧比未处理的pHEMA水凝胶具有更高的粘附力。含有臭氧化的pHEMA水凝胶的表观界面剪切强度比未处理的PET单丝高65%。此外，从pHEMA水凝胶中拉出臭氧处理的PET束的力约为1.5。比未处理的束观察到的高81%。
This work reports a methodology to improve the adhesion between poly(ethylene terephthalate) (PET) fibers and poly(hydroxyethyl methacrylate) (pHEMA) hydrogels by treating PET with ozone. The surface chemistry of PET was examined by water contact angle measurements, X-ray photoelectron spectroscopy (XPS), infrared reflection absorption spectroscopy (IRAS) and attenuated total reflectance infrared spectroscopy (ATR-IR) yielding information about the chemical functionalities at depths upon 0.6μm. Ozone treatment introduces several polar groups in the surface of PET through oxidation and chain scission resulting in increased wettability. These groups include mostly carboxylic and anhydride groups and in small extent hydroxyl groups. Atomic force microscopy (AFM) analysis shows that the surface of ozone-treated PET films is fully covered with spherical particles that are removed after washing the film with water. During the washing step carboxylic functionalities were removed preferentially, as demonstrated by XPS and IR analysis. According to pull-out tests, PET monofilaments and bundles treated by ozone had a higher adhesion to pHEMA hydrogels than untreated ones. The apparent interfacial shear strength is 65% higher on pHEMA hydrogel containing an ozonated than an untreated PET monofilament. In addition, the force to pull-out an ozone-treated PET bundle from pHEMA hydrogel is ca. 81% higher than the one observed for the untreated bundle.