【摘要】 为了研究Ag粒子的含量对Ag/P(DMAEMA-co-AMPS)纳米复合水凝胶的溶胀率、温度响应和p H响应的影响,采用紫外辐射法成功制备了Ag/P(DMAEMA-co-AMPS)纳米复合水凝胶。通过傅里叶变换红外光谱(FT-IR)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线光电子能谱仪(XPS)等分析手段,对复合水凝胶的结构、形貌和界面相互作用进行表征。结果表明,立方晶系结构的Ag纳米粒子均匀分布在水凝胶三维网络结构中,Ag纳米粒子基本呈球形,粒径分布较窄,平均粒径约为4 nm;Ag纳米粒子与聚合物基体之间存在较强的配位相互作用。较P(DMAEMA-co-AMPS)水凝胶而言,Ag/P(DMAEMA-co-AMPS)纳米复合水凝胶的平衡溶胀率由171.6%降至41.49%,而且溶胀速率也明显减小。此外,Ag/P(DMAEMA-co-AMPS)纳米复合水凝胶的平衡溶胀率变化结果也说明了改变Ag纳米粒子的含量,Ag/P(DMAEMA-co-AMPS)纳米复合水凝胶可以对其温度及p H敏感性进行调控,既能保持较高的平衡溶胀率,又具有较高的温度响应性。在p H范围内(p H=2~12)能保持较高的平衡溶胀率,且最大的平衡溶胀率为350%。更多还原

【Abstract】 In order to study the effect of the content of Ag particles on the swelling ratio,temperature response and p H response of Ag/P( DMAEMA- co- AMPS) nanocomposite hydrogels,Ag/P( DMAEMA- co- AMPS)nanocomposite hydrogels were successfully prepared by UV irradiation. The structure,morphology and interfacial interactions of the composite hydrogels were characterized by using the Fourier transform infrared spectroscopy( FT- IR),X ray diffraction( XRD),scanning electron microscopy( SEM),transmission electron microscopy( TEM) and X ray photoelectron spectroscopy( XPS) and other analytical tools. The results showed that the cubic structure of Ag nanoparticles is evenly distributed in the three- dimensional network structure of the hydrogel. Ag nanoparticles are basically spherical,and the particle size distribution is narrow and the average particle size is about 4 nm. There is a strong coordination interaction between Ag nanoparticles and polymer matrix.Compared with the P( DMAEMA- co- AMPS) hydrogel,the equilibrium swelling ratio of Ag/P( DMAEMA-co- AMPS) nano composite hydrogel decreased from 171. 6% to 41. 49%,and the swelling rate also decreased significantly. In addition,the equilibrium swelling ratio change of Ag/P( DMAEMA- co- AMPS) nanocomposite hydrogels was also explained by the change of the content of Ag nanoparticles. Ag/P( DMAEMA- co-AMPS) nano composite hydrogel can control the temperature and p H sensitivity,which can maintain a higher equilibrium swelling ratio and a higher temperature response. In the p H range( p H = 12 ~ 2),it can maintain a higher equilibrium swelling ratio,and the maximum equilibrium swelling ratio is 350%.更多还原