Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213164, China.
Soft Matter. 2019 Apr 3;15(14):2950-2959. doi: 10.1039/c8sm02635a.
Polystyrene modified bismuth oxide particles (PS@Bi2O3) were prepared and characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Using acrylamide (AM) as a monomer, and PS@Bi2O3 as laser sensitive additives, PAM/PS@Bi2O3 hydrogels were fabricated and treated by a 1064 nm near-infrared laser. The laser responsive properties of PAM/PS@Bi2O3 hydrogels were investigated at different current intensities and loading content of PS@Bi2O3 by visual observation, optical microscopy, and SEM, and the mechanism of laser response was analyzed by XRD and Raman spectroscopy. The results indicate that the PAM hydrogel with added PS@Bi2O3 particles showed excellent response to the laser, and high contrast and resolution text and pattern marks on the hydrogel surface can be obtained. The selection of suitable laser current intensity is key to the laser response of the PAM/PS@Bi2O3 composite hydrogel. Through analysis of XRD, Raman spectroscopy, and TGA data, the laser marking of the PAM/PS@Bi2O3 hydrogels originates from the generation of both bismuth metal and amorphous carbonized materials. After adding PS@Bi2O3 with a loading content from 1% to 3%, the mechanical properties of the hydrogels were improved, but the swelling properties were finally decreased.
聚苯乙烯修饰的氧化铋粒子（PS@Bi2O3）通过傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）进行了制备和表征。以丙烯酰胺（AM）为单体，PS@Bi2O3为激光敏化添加剂，制备了 PAM/PS@Bi2O3水凝胶，并通过 1064nm 近红外激光进行处理。通过肉眼观察、光学显微镜和 SEM 研究了不同电流强度和 PS@Bi2O3负载含量下 PAM/PS@Bi2O3水凝胶的激光响应特性，并通过 XRD 和拉曼光谱分析了激光响应的机制。结果表明，加入 PS@Bi2O3 颗粒的 PAM 水凝胶对激光表现出优异的响应性，可以在水凝胶表面获得高对比度和高分辨率的文字和图案标记。选择合适的激光电流强度是 PAM/PS@Bi2O3 复合水凝胶激光响应的关键。通过 XRD、拉曼光谱和 TGA 数据分析，PAM/PS@Bi2O3 水凝胶的激光标记源于铋金属和无定形碳化材料的同时产生。当 PS@Bi2O3 的负载含量从 1%增加到 3%时，水凝胶的力学性能得到了提高，但最终的溶胀性能下降了。
