Physical and mechanical properties of natural rubber latex film (Rubber Dam) products with filler nanocrystal cellulose from peanut shell (Arachis hypogea L.) and synthetic dyes

Abstract

Abstract Rubber dam is considered as an ideal device for tooth isolation. Rubber dam is one of example product from natural rubber latex. Peanut shell is one of the industrial waste containing 35,7% of cellulose. Nanocrystal cellulose from peanut shell can be an alternative waste utilization and have potential as filler in natural rubber latex films. Studies about effect of loading nanocrystal crystal as filler on natural rubber latex films with polyvinyl pyrrolidone (PVP) and using synthetic dyes have been carried out on crosslink density and mechanical properties such as tensile strength, elongation at break and tensile modulus. The process begins with pre-vulcanization of natural rubber latex at temperature 70°C with 0, 2, 4, 6, 8 gram of filler loading and followed by vulcanization at 120°C for 10 minutes. The results obtained with loading nanocrystal crystal filler using synthetic dyes for physical properties, crosslink density, will increase with the increase of filler loading. For mechanical properties, tensile strength and tensile modulus will increase with greater filler loading, while elongation at break will decrease. The best results are obtained for mechanical properties of natural rubber latex film products using synthetic dye on 6 gram nanocrystal cellulose of filler loading.