Photoacoustic spectroscopy (PAS) has been widely used as a nondestructive and sensitive analytical technique used to determine the thermal diffusivity, effusivity and heat capacity of different materials. In this work, the open cell photoacoustic technique (OPC) technique was used for the kinematic study of heat transfer processes as a function of time for curing nanoresin composites. An exponential growth of the signal during the process of curing was observed. The nanoresin was based on silver nanoparticles (AgNPs) that were synthesized using a green method from an aqueous extract of Capsicum annuum var annuum as an Ag reducer and an acrylic resin. It was cured using a violet laser beam with a wavelength of 405 nm with an average power of 120 mW. The characteristic curing time was measured as a function AgNPs concentration of 0.0, 5.16, 7.27, 11.85, 14.50, 16.86 and 20.96 × 10 −4 vol%. The results showed an increase in the curing time of composite resin containing the AgNPs compared to the pure resin. This study has applications in printing parts using laser stereolithography.

中文翻译：

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光声光谱法测定丙烯酸纳米复合材料的固化时间

光声光谱 (PAS) 已被广泛用作一种无损且灵敏的分析技术，用于确定不同材料的热扩散率、扩散率和热容量。在这项工作中，开孔光声技术 (OPC) 技术用于热传递过程的运动学研究，作为固化纳米树脂复合材料的时间的函数。在固化过程中观察到信号的指数增长。该纳米树脂基于银纳米粒子 (AgNPs)，使用绿色方法从辣椒的水提取物作为银还原剂和丙烯酸树脂合成。使用波长为 405 nm、平均功率为 120 mW 的紫色激光束对其进行固化。特征固化时间测量为 AgNPs 浓度为 0.0、5.16、7.27、11 的函数。85、14.50、16.86 和 20.96 × 10 -4 体积％。结果表明，与纯树脂相比，含有 AgNPs 的复合树脂的固化时间增加。这项研究在使用激光立体光刻印刷零件中具有应用。