Rapid in situ curing of silicone rubber with copper phosphate nanomaterials by near-infrared spectroscopy photothermal conversion

Abstract

High-yield near-infrared laser photothermal conversion materials copper phosphate and copper hydroxyphosphate were prepared.The photothermal effect of copper phosphate nanoparticles provided the heat required for photothermal curing of polydimethylsiloxane (PDMS).Under 808 nm laser, copper phosphate and copper hydroxyphosphate were uniformly dispersed in PDMS as internal heat sources, thus having a huge heat transfer area, which made the photothermally cured copper phosphate-PDMS composite material have a higher temperature rise speed, and near-infrared laser photothermal curing solved the problem of poor penetration of ultraviolet photothermal curing.The vulcanization degree of silicone rubber was characterized by the swelling method.The experimental results showed that, compared with oven heating curing, the photothermal curing of PDMS had a faster curing rate, and the photothermal curing samples had good tensile strength and hardness.Scanning electron micro scope images showed the state of the copper phosphate material in the silicone rubber matrix, which proved the effect of photothermal curing on the improvement of interface bonding, and explained the reason for the improvement of the mecha-nical properties of the photothermal curing samples.

Keywords

• silicone rubber
• near-infrared laser
• photothermal conversion
• copper phosphate
• copper hydroxyphosphate
• in situ curing
• rapidly curing
• nanomaterials