含二氮杂萘酮结构聚醚砜酮膜的微波等离子体处理研究

含二氮杂萘酮结构型聚醚砜酮(ＰＰＥＳＫ)是近年来本研究组开发成功的新型耐高温聚合物1].该聚合物具有优异的力学性能和突出的耐热性,玻璃化转变温度(Ｔｇ)为265～305℃(随砜酮比不同而变化),其结构式如下:ＯＮＮＯＳＯＯＯＮＮＯＣＯ　　研究表明,用ＰＰＥＳＫ制成的气体分离膜对Ｏ2/Ｎ2、ＣＯ2/Ｎ2有良好的气体渗透性和透过选择性2,3],但由于其亲水性不高进而限制了它在纳滤膜和反渗透膜等方面的应用,因此有必要对其进行改性.目前,常用的膜及膜材料改性的方法有磺化、氯甲基化季胺化、接枝等化学改性和低温等离子体与辐射等物理改性.其…

STUDY OF MODIFICATION OF POLY(PHTHALAZINONE ETHER SULFONE KETONE) FILM TREATED BY CARBON DIOXIDE MICROWAVE PLASMA

Low temperature plasma has been used to modify the surface properties of polymers to a large extent. The effects of ECR microwave plasma with carbon dioxide (CO\-2) on the wettability of the poly(phthalazinone ether sulfone ketone) (PPESK) surface were discussed. Results showed that a shorter treatment time and a higher discharge power could give the best wettability of PPESK films. The toughness of the treated film surface increased with the discharge power. The wettability of PPESK films treated by CO\-2 plasma declined with the aging time after treatment, and the changing rate of different power is resemble. The increase in water contact angle for plasma treated PPESK surfaces upon ageing is mainly ascribed to the surface rearrangement of macromolecular segments, the loss of oxygen\|containing moieties introduced by the plasma treatment. ESCA analysis of CO\-2 plasma treated polymer surfaces showed that carbonyl groups could be increased by carbon oxide plasma treatment in short time.