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Fluoroalkylation of Textile Surface by Fluoro Silane Coupling Agents

氟硅烷偶联剂对纺织品表面的氟烷基化

基本信息

批准号：
06680036
负责人：
KAWASE Tokuzo
金额：
$ 1.28万
依托单位：
OSAKA CITY UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680036/
关键词：
Silane Coupling Agents ESCA (XPS) Analysis Solvent Durability Surface Modification Surface Free Energy Water and Oil Repellency Siloxane Network フルオロアルキル化

项目摘要

Novel multi-chain silane coupling agents having end-capped fluoroalkyl group have been synthesized. Glass surface was modified by multi-chain as well as single-chain silane coupling agents as a model of cellelosic fibers. From contact angle measurements, surface free energies were determined, and the surface was proved highly water and oil repellent. Especially, multi-chain type silanes were more reactive and effective than single-chain type silane. The linear correlation was observed between the area ratio of the F_<ls> peak to the Si_<2p> peak. The structure of siloxane layr can be discussed in terms of network interphase model.Surface modification of polyester was also examined using single-chain and multi-chain silane coupling agents having end-capped fluoroalkyls. All silane coupling agents reduced the surface free energy of polyester to 9-12mJ/m^2 for dispersive component and 3-8mJ/m^2 for polar component, respectively, and all the surfaces changed to excellent water-and oil-repellent. In ESCA measurements, as there exists a C_<ls> peak attributable to the C=O of polyester, the thickness of siloxane layr on the surface can be evaluated less than 50 A.The solvent durability of modified surface was evaluated using contact angle and ESCA measurements. Though all modified surfaces have durability against dodecane, xylene, ethyl acetate, tetrachloro ethylene, and hydrochloric acid, long time immersion in Freon reduced the oil-repellency of some surfaces modified with single-chain and multi-chain silanes having short fluoroalkyls. Especially, the immersion in alkaline solution would destroy siloxane network and reduced their water-repellency while their oil-repellency interestingly unchanged. The modification mechanism is also discussed in terms of thermal anchoring.

合成了一种新型的含氟烷基多链硅烷偶联剂。以多链硅烷偶联剂和单链硅烷偶联剂对玻璃表面进行改性，作为纤维的模型。通过接触角的测量，确定了表面的自由能，证明了该表面具有很强的拒水拒油性能。尤其是多链型硅烷比单链型硅烷更具活性和有效性。F&lt；ls&gt；峰与Si&lt；2p&gt；峰的面积比呈线性关系。硅氧烷层的结构可以用网络界面模型来讨论，也可以用末端带有氟烷基的单链和多链硅烷偶联剂来考察聚酯的表面改性。所有硅烷偶联剂均使分散组分的表面自由能降至9~12mJ/m^2，极性组分的表面自由能降至3~8mJ/m^2，均表现出优良的拒水拒油性能。在ESCA测试中，由于存在一个可归因于聚酯的C=O的C&lt；ls&gt；峰，因此表面的硅氧烷涂层厚度可以评估为小于50A。尽管所有改性表面都具有耐受性，但长时间浸泡在氟里昂中会降低某些用短氟烷基的单链和多链硅烷改性的表面的拒油性。尤其是在碱性溶液中浸泡会破坏硅氧烷网络，使其拒水性能降低，而其拒油性能不变。并从热锚定的角度探讨了改性机理。