ABSTRACT

Herein, gold nanoparticles (Au Nps) imprinted polyacrylic acid/chitosan (PAA/CS) nanocomposite hydrogels are designed by in situ polymerization technique. The change in crystallite size and d-spacing is established from X-ray diffraction study. It is interesting to notice that the layered morphology of PAA/CS/Au nanocomposite hydrogel is achieved from field emission scanning electron microscopy due to entanglement of polymeric chains by imprintment of Au Nps. The orientations of polymeric chains reveal the enhancement in pH-responsive swelling percentage and prolong water holding capacity of PAA/CS/Au nanocomposites. Biodegradation of the as-synthesized material is studied from which the antimicrobial activity of Au Nps is predicted.

摘要

在此，通过原位聚合技术设计了金纳米颗粒（Au Nps）印迹聚丙烯酸/壳聚糖（PAA / CS）纳米复合水凝胶。通过X射线衍射研究确定了微晶尺寸和d间距的变化。有趣的是，PAA / CS / Au纳米复合水凝胶的层状形态是通过场发射扫描电子显微镜观察到的，这是由于Au Nps的印迹使聚合物链缠结所致。聚合物链的方向揭示了PAA / CS / Au纳米复合材料的pH响应溶胀百分比的提高和保水能力的延长。研究了合成后材料的生物降解，由此可预测Au Nps的抗菌活性。