多羧基P（POSS-MAA）复合材料的制备及应用

Synthesis and Application of Multi-carboxy P(POSS-MAA) Composite

摘要:

以乙烯基三甲氧基硅烷（A-171）为原料，水解缩合合成了笼型八乙烯基倍半硅氧烷（POSS-Vi），进而POSS-Vi与甲基丙烯酸（MAA）发生自由基聚合，制备了多羧基P（POSS-MAA）复合材料。采用核磁共振波谱（NMR），傅里叶变换红外光谱（FTIR），X-射线衍射（XRD）和透射电子显微镜（TEM）对其进行了表征，结果表明：成功制备了P（POSS-MAA）复合材料，POSS-Vi均匀分散于P（POSS-MAA）复合材料。将P（POSS-MAA）复合材料配合质量分数2%铬粉应用于山羊皮酸皮的鞣制工艺中作为结合鞣制与质量分数2%铬粉鞣制进行对比，应用结果表明，复合材料的引入有利于提高坯革的收缩温度、增厚率、降低废液中Cr2O3含量；当POSS-Vi质量分数在P（POSS-MAA）复合材料中为6%时，结合鞣鞣制效果最好，坯革收缩温度（Ts）可达96.5℃，增厚率达36%；与铬单独鞣制对比，废液中Cr2O3质量浓度由122mg/L降低至41mg/L。

Abstract:

Multi-carboxyl P(POSS-MAA) composite material was prepared by the free radical polymerization of methacrylic acid (MAA) and Octavinyloctasilsesquioxane (POSS-Vi) which was obtained by vinyl trimethoxysilane(A-171) of hydrolysis and condensation. The structure of the polymer was characterized by Nuclear Magnetic Resonance(NMR), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and Transmission Electron Microscope(TEM), the results showed that P(POSS-MAA) composite was successfully obtained, and the POSS-Vi in P(POSS-MAA) composite can be uniformly dispersed. It was indicated that the shrinkage temperature and thickening rate of the leather had improved, in addition, the chromium content in the waste solution was also decrease when the P(POSS-MAA) composite combined with mass fraction 2% chromium was applied to the tanning process of goat acid skin. Meanwhile, when the content of the POSS-Vi was 6% in the P(POSS-MAA) composite, the shrinkage temperature ( Ts ) can reach up to 96.5℃ and thickening rate can also increased to 36% after the leather pretanned with the P(POSS-MAA) composite combined with 2% chromium , and the chromium mass concentration in the waste solution can be decreased from 122mg/L to 41mg/L compared with chrome tanning.