基于咪唑型离子液体两性聚合物表面活性剂的合成及在皮革加脂中的应用

Synthesis and Application of Amphoteric Polymers surfactant Based on Imidazole Ionic Liquids in leather fatliquoring

摘要:

以N-乙烯基咪唑、溴代正己烷为原料，经亲核取代反应合成溴化1-己基-3-乙烯基咪唑（HVIMBr）。然后，以溴化1-己基-3-乙烯基咪唑（HVIMBr）、甲基丙烯酸二甲氨乙酯（DMAEMA）为原料，偶氮二异丁腈（AIBN）为引发剂，通过自由基聚合制备共聚物（p（DMAE-co-[HVIMBr))。之后，用1,3-丙磺酸内酯对共聚物进行季胺化改性合成两性聚合物p（DMAE-co-[HVIMBr)PS。采用红外光谱（FT-IR）和核磁共振（1H-NMR）对产物的结构进行表征。最后，将不同比例两性聚合物与蓖麻油复配后应用于皮革的加脂工序。使用环境扫描电子显微镜（E-SEM）和超景深显微镜等手段研究了加脂处理后白湿皮的结构与形貌，测定了加脂后皮革的柔软度及物理机械性能。结果表明，合成的两性聚合物p（DMAE-co-[HVIMBr)PS加脂剂处理皮革后，其柔软度和物理机械性能均有所提高。

Abstract:

Copolymers p (DMAE-co-[HVIM]Br) were prepared by free radical polymerization using 1-dodecyl-3-vinylimidazole bromide [HVIM] Br and dimethylaminoethyl methacrylate (DMAEMA) as raw materials and azodiisobutyronitrile (AIBN) as initiator. Namely,[HVIM] Br was synthesized from1-bromododecane and an ionic liquid such as 1-vinylimidazole. Then amphoteric polymer p (DMAE-co-[HVIM]Br) PS was synthesized by quaternization of copolymer with 1,3-propionic lactone. The structure of the products were characterized by infrared spectroscopy (FT-IR), nuclear magnetic resonance (1H-NMR). Then the combination of amphoteric polymer and castor oil in different proportions was applied to the fatliquoring process of leather. The structure and morphology of the wet white leather after fatliquoring were studied by SEM and ultra-deep field microscopy. The softness and physical and mechanical properties of the leather after fatliquoring were measured. The results showed that the softness and physical and mechanical properties of the leather treated with the synthesized amphoteric polymer were improved.