Polyvinylamine-coated mesocellular silica foam (MCF) was synthesized by grafting poly(n-vinylformamide) (PNVF) followed by the acid hydrolysis of the formamide groups with hydrochloric acid (HCl) and subsequent neutralization with sodium hydroxide (NaOH). In order to graft PNVF, MCF silica was previously functionalized with the coupling agent vinyltrimehtoxysilane (VTMS). The PNVF content in the hybrid material was tailored by varying some reaction parameters such as monomer concentration, reaction time, and temperature. The grafted polymer content was determined by thermogravimetric analysis (TGA) and ranged from 27% to 50%. Additionally, small-angle X-ray scattering (SAXS), infrared spectroscopy (FT-IR), nitrogen adsorption–desorption analyses, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques confirmed the grafting of PNVF onto MCF. The N₂ adsorption–desorption studies showed that the textural properties of the pristine MCF decreased as the amount of grafted PNVF increased confirming the deposition of polymer into silica. However, according to SAXS, SEM, and TEM studies, the mesostructure of MCF was maintained even after acid hydrolysis of PNVF and its subsequent neutralization to obtain PVAm.

通过接枝聚（n-乙烯基甲酰胺）（PNVF），然后用盐酸（HCl）将甲酰胺基酸水解，然后用氢氧化钠（NaOH）中和，来合成聚乙烯胺涂层的介孔二氧化硅泡沫（MCF）。为了接枝PNVF，事先用偶联剂乙烯基三甲氧基硅烷（VTMS）将MCF二氧化硅官能化。通过改变一些反应参数（例如单体浓度，反应时间和温度）来定制杂化材料中的PNVF含量。接枝的聚合物含量通过热重分析（TGA）确定，范围为27％至50％。此外，小角度X射线散射（SAXS），红外光谱（FT-IR），氮吸附-解吸分析，扫描电子显微镜（SEM），透射电子显微镜（TEM）技术证实了PNVF接枝到MCF上。然后₂吸附-解吸研究表明，随着PNVF接枝量的增加，原始MCF的组织性能下降，这证实了聚合物在二氧化硅中的沉积。但是，根据SAXS，SEM和TEM研究，即使在PNVF酸水解并随后中和以获得PVAm之后，MCF的介观结构仍得以保持。