含氨基和羧基POSS/聚合物复合材料鞣制性能  

Tanning properties of POSS/polymer composites containing amino and carboxyl groups

作　　者：高党鸽 程一铭[1,2] 吕斌 马建中 GAO Dangge;CHENG Yiming;LYU Bin;MAJianzhong(College of Light Industry Science and Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;National Experimental Teaching Demonstration Center of Light Chemical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]轻化工程国家级实验教学示范中心(陕西科技大学),陕西西安710021

出　　处：《精细化工》2021年第6期1227-1235,共9页Fine Chemicals

基　　金：国家自然科学基金面上项目(21878182);陕西省“高层次人才专项支持计划”项目。

摘　　要：以笼型八乙烯基倍半硅氧烷(POSS-Vi)、丙烯酰胺(AM)和甲基丙烯酸(MAA)为原料,通过自由基聚合制备了含氨基、羧基的POSS/聚合物复合材料[P(POSS-AM-MAA)]。采用FTIR、XRD、TEM对P(POSS-AM-MAA)的结构和形貌进行表征。结果表明:P(POSS-AM-MAA)是具有立方笼型结构的POSS外围被聚合物链段包覆的材料。将复合材料P(POSS-AM-MAA)配合占酸皮质量4%的戊二醛应用于山羊酸皮鞣制工艺中,考察了氨基含量、相对分子质量、复合材料用量等对坯革性能的影响。当P(POSS-AM-MAA)中氨基含量为433μmol/g、数均相对分子质量(简称数均分子量)为27237,其用量为酸皮质量的8%,结合pH为8.5时,结合鞣坯革收缩温度为83.7℃,增厚率为107.3%,相较于单独戊二醛鞣制坯革均有所提高;结合鞣坯革中的游离甲醛含量为28.3 mg/kg;结合鞣坯革的抗张强度为16.5 MPa,断裂伸长率为109.5%,撕裂强度为58.8 N/mm,与戊二醛鞣制坯革相当。POSS/polymer composites [P(POSS-AM-MAA)] containing amino and carboxyl groups were prepared by free radical polymerization from cage-type octavinyloctasilsesquioxane(POSS-Vi), acrylamide(AM) and methacrylic acid(MAA). The structure and morphology of P(POSS-AM-MAA) were characterized by FTIR, XRD and TEM. The results showed that P(POSS-AM-MAA) was a material with a cubic cage structure of POSS surrounded by polymer chains. P(POSS-AM-MAA) combined with glutaraldehyde accounting for 4% of acid tare mass was used in the tanning process of pickled goat skin. The effects of amino content, relative molecular mass and composite material dosage on the properties of leather were investigated. The results indicated that when the amino content was 433 μmol/g, number-average relative molecular mass of P(POSS-AM-MAA) was 27237, and P(POSS-AM-MAA) dosage was 8% of the mass of pickled goat skin, combined p H was 8.5, the shrinkage temperature and thickening rate of the tanned leather were 83.7 ℃ and 107.3%, both higher than those of glutaraldehyde tanned leather. The free formaldehyde content in the combined tanned leather was 28.3 mg/kg. The tensile strength, elongation at break and tear strength of the combined tanned leather were 16.5 MPa, 109.5% and 58.8 N/mm, which were similar to those of glutaraldehyde tanned leather.

关 键 词：多面体低聚倍半硅氧烷 无铬鞣 结合鞣 复合材料 清洁生产 皮革化学品 

分 类 号：TB332[一般工业技术—材料科学与工程]