聚氨酯改性胶原蛋白的机理及应用研究(Ⅲ)(续)——聚氨酯改性胶原蛋白皮革复鞣填充剂  

Mechanism of Polyurethane Modified Collagen and its Application(Ⅲ):retanning and filling agent of polyurethane modified collagen protein

作　　者：许艳琳[1] 孙静[1] 庞晓燕[2] 丁志文[2] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021 [2]中国皮革和制鞋工业研究院,北京100016

出　　处：《中国皮革》2010年第7期10-14,共5页China Leather

基　　金：国家自然科学基金项目(20676144);国家科技支撑计划项目(2006BAC02A09);科技部技术开发项目(2008EG111011)

摘　　要：以2,4-甲苯二异氰酸酯(TDI)、聚丙二醇1000(PPG1000)、二羟甲基丙酸(DMPA)和胶原蛋白粉为原料,合成了一种新型的皮革用水性聚氨酯改性胶原蛋白复鞣填充剂(WPCF)。重点探讨了n(TDI/PPG1000)(摩尔比)、n(-NCO/-OH)(TDI和PPG1000反应后剩余—NCO和后续反应物中活性基团的摩尔比)、反应温度、加料顺序、DMPA用量等因素对分散液性能的影响。确定了工艺过程:首先TDI和PPG1000在70℃预聚1h,然后加入DMPA(用氮甲基吡咯烷酮(NMP)溶解),在80℃反应2h,加入胶原蛋白粉反应6h,其中,n(TDI/PPG1000)=5,n(-NCO/-OH)=1·3,ω(—COOH)=3%(由DMPA引入的羧基含量),中和剂选择三乙胺。应用试验表明:经过WPCF-4复鞣填充后的革,平均增厚率为41·2%,抗张强度较高为19·66N/mm2。皮革的粒面平整、清晰、手感丰满、弹性好。A new type of retanning and filling agent of waterborne polyurethane modified collagen protein dispersion ：（WPCF） was prepared by toluene 2,4 -diisocyanate,polyether, dimethylol propionic acid （DMPA）and collagen protein. The effects of n〈TDI/PPG1000） （mole ration）, n（NCO/-OH） （mole ration of residual -NCO that after the reaction of TDI and PPG1000 and active groups in the following reactants） ,reaction temperatures, addition sequence, concentration of DMPA on the properties of polyurethane dispersion were studied. A preferred synthesis process was given as follows ：TDI and PPG1000 were prepolymerized at 70℃ for lh ,then reacted with DMPA（ dissolved in N - methylpyrrolidone（NMP） ） at 80℃ for 2h. Collagen Protein was added to react for 6h. The reaction condition of n〈TDI/PPG1000） = 5 ,n（ -NCO/-OH） = 1. 3, （ -COOH） =3% （the carboxyl content induced by DMPA） were chosen. Triethylamine was chosen as the neutralization agent. Fourier transform infrared spectroscopy（IR） was used to characterize WPCF. The results of application of WPCF -4 shows that the thickening rate of leather is 41.2% and the tensile strength of leather is 19.66N/mm2. The finished leather made by the above product has fine and compact grain, full and elastic hand feel.

关 键 词：胶原蛋白 聚氨酯 复鞣填充剂 合成 应用 

分 类 号：TS529.2[轻工技术与工程—皮革化学与工程]