Wang Yunfeng, Qu Rongjun, Mu Yinglei, Sun Changmei, Ji Chunnuan, Zhang Ying, An Kai, Jia Xinhua, Zhang Yu
School of Chemistry and Materials Science, Ludong University, Yantai, China.
Front Chem. 2019 Jul 2;7:465. doi: 10.3389/fchem.2019.00465. eCollection 2019.
A double reagents simultaneous functionalization (DRSF) was used to prepare porous polysilsesquioxane with NH and SH bifunctional groups (PAMPSQ) coated poly(-phenylenetherephthal amide) (PPTA) fibers adsorbents (PPTA-AM), via condensations with aminopropyltriethoxysilane (APTES) and mercaptopropyltriethoxysilane (MPTES). The PAMPSQ coated on the PPTA surface was in the form of nanoparticles and its morphology varied with the proportion of the reactants. The PAMPSQ exhibited loose open meso- or macroporous features. The functional groups utilization of PAMPSQ was much higher than those of polysilsesquioxane on the mono-functional adsorbents with thiol or amino groups. The selective adsorption of PPTA-AM adsorbents for Hg(II) in binary component metal ion systems indicated their potential application in environmental remediation. The adsorption mechanism of Hg(II) onto PPTA-AM was proposed.
采用双试剂同步功能化（DRSF）方法，通过与氨丙基三乙氧基硅烷（APTES）和巯丙基三乙氧基硅烷（MPTES）缩合反应，制备了一种带有NH和SH双官能团的多孔聚倍半硅氧烷（PAMPSQ）包覆的聚对苯二甲酰对苯二胺（PPTA）纤维吸附剂（PPTA-AM）。包覆在PPTA表面的PAMPSQ呈纳米颗粒状，其形态随反应物比例的变化而改变。PAMPSQ呈现出疏松的介孔或大孔特征。PAMPSQ的官能团利用率远高于单官能团巯基或氨基吸附剂上的聚倍半硅氧烷。PPTA-AM吸附剂在二元组分金属离子体系中对Hg(II)的选择性吸附表明其在环境修复中的潜在应用价值。文中还提出了Hg(II)在PPTA-AM上的吸附机理。
