蒙脱土负载引发剂法制备PMAA/MMT纳米复合材料

Preparation of PMAA/MMT nanocomposite via MMT-surpported Initiator

将引发剂过硫酸钾(KPS)负载在MMT片层上制得负载型引发剂MMT-KPS-1和MMT-KPS-2。进而引发甲基丙烯酸(MAA)聚合制备聚甲基丙烯酸/蒙脱土(PMAA/MMT)纳米复合材料。采用X射线衍射(XRD)、热重分析(TG)、热分析(DTA)分别对负载引发剂和纳米复合材料进行表征。结果表明,KPS进入MMT的片层间,并且负载引发剂(MMT-KPS-1)的引发活性较KPS有所提高;所制备的PMAA/MMT纳米复合材料属于剥离型纳米复合材料,应用于皮革鞣制所得坯革的湿热稳定性、增厚率、抗张强度、撕裂强度都有所提高,鞣后浴液中铬含量显著降低。

Supported initiator （MMT-KPS-1 and MMT-KPS-2） was synthesized by intereation initiator molecules in the galleries of montmorillonnite（MMT）. The MMT-supported initiator was used to initate the methaerylie acid and prepare PMAA/MMT nanoeomposite. The MMT-supported initiator and the structure of PMAA/ MMT nanoeomposite were ehraeterized by XRD,TG and DTA. The results indicated the successful intereation of initiation in the galleries of MMT layer. The effect of MMT-supported （MMT-KPS-1） initiator have been in creased. The structure of PMAA/MMT nanoeomposite belong to exfoliated nanoeomposite, The wet-heat resistenee,inerement ratio, tensile strength and tear strength of tanned leather have been improved in a certain scale and the chromium content in the effluent can be redueed greatly.