High-silicone rubber urinary catheter modification materials can be evaluated through antibacterial performance testing. Ultrafine cellulose nanocrystal powder (NCC) was obtained by modifying cellulose nanocrystals with the silane coupling agent KH550. Then, using methyl vinyl silicone rubber (VMQ) as a matrix, modified NCC was added to prepare an NCC/VMQ composite material.
Performance testing of this composite material showed that the addition of NCC significantly changed the deformation resistance of VMQ, while having little effect on its tear strength, tensile strength, and elongation at break. A 1.5% NCC addition was considered an appropriate preparation parameter. In a simulated urine environment, the composite material exhibited good corrosion resistance and maintained relatively stable mechanical properties. Application testing showed that the antibacterial effect of urinary catheters made from this composite material was not significantly different from that of traditional silicone rubber materials, but it significantly alleviated the discomfort experienced by clinical patients during use.
