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Citation: MA Hong-qin, TAN Xin, ZHU Hui-ming. Surface Activation and Graft of the Ultrafine PTFE Particles[J]. Acta Physico-Chimica Sinica, ;2005, 21(07): 703-706. doi: 10.3866/PKU.WHXB20050701 shu

Surface Activation and Graft of the Ultrafine PTFE Particles

1.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072

Corresponding author: ZHU Hui-ming,
Received Date: 4 November 2004
Available Online: 15 July 2005

The surface of ultrafine polytetrafluoroethylene (PTFE) particles has been activated by sodium naphthalide solution. The 11-Aminoundecanoic acid [NH2(CH2)10COOH] molecules have been grafted on the activated PTFE particle surface. The activated and grafted PTFE particles have been characterized by infrared spectroscopy (IR) and X-ray photoelectron spectroscopy (XPS). The results show that the hydroxyl groups, carbonyl groups, and carboxyl groups are formed on the ultrafine PTFE particle surface after activated in sodium naphthalide solution. The hydroxyl groups are turned into carbonyl groups, and then to carboxyl groups with the increase of sodium naphthalide concentration and the activating time. The sodium naphthalide solution is effective in activating the ultrafine PTFE particle surface. The amidogens of 11-Aminoundecanoic acid molecules can react with the surface hydroxyl groups; as a result, the 11-Aminoundecanoic acid molecules can be anchored on the activated PTFE particles surfaces through chemical bonding.
- Ultrafine PTFE prticles;Surface activation;Surface chemical graft; IR;XPS
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