Mesoporous Silica Nanorods For The Highly-aging Resistance Rubber Through Controlled Release Of Antioxidant

Rubber materials will be affected by heat,oxygen and other factors during the process of use,and aging will inevitably occur,resulting in unstable rubber mechanical properties and reducing the service life of rubber.In the traditional rubber manufacturing industry,the addition of small molecule antioxidants is usually used to improve the anti-aging properties of rubber,thereby alleviating the aging process of rubber.However,due to the low solubility of the small molecule antioxidant in the rubber system,it is easy to accumulate on the rubber surface and produce "blooming" phenomenon,make the antioxidant loses its anti-aging ability,and it will also cause adverse effects on the environment.It is an important research direction to improve the anti-aging performance of rubber and alleviate the "blooming" phenomenon of rubber.In this paper,the synthesis process of mesoporous silica nanorods was studied,and it was proposed to prepare anti-aging rubber with mesoporous silica nanorods loaded with antioxidant,which achieved the controlled release of antioxidant in the rubber matrix and improved The rubber's heat-resistant oxygen aging performance effectively alleviates the problem of rubber blooming.The specific research content is as follows:First,the surfacefunctionalized mesoporous silica nanorods were synthesized and the effect of reaction conditions on the morphology of silica was investigated.The infrared absorption spectrum proved the sulfhydrylized mesoporous silica nanorods.Successfully synthesized,mesoporous silica nanorods can be used as a carrier of antioxidants.The kinetics of the antioxidants released from mesoporous silica nanorods in polar solvents,non-polar solvents and rubber matrix have been studied.The controlled release of the anti-aging agent loaded by the silica nanorods prolongs the effective time of the anti-aging agent.In addition,the aging resistance of styrene butadiene rubber was studied by comparing the retention of mechanical properties before and after thermal oxidative aging.Aging for 168 hours in a thermal oxygen aging oven at 100?,the mesoporous silica nanorods loaded antioxidant composite material has a better retention of mechanical properties than the rubber composite material added with the free form of antioxidant.The migration of water is restricted,and the phenomenon of "blooming" is effectively alleviated.It is proved that the antioxidant loaded with mesoporous silica nanorods can alleviate the blooming phenomenon under the same amount of antioxidant agent,and improve the heat-resistant oxygen aging performance of the styrene butadiene rubber composite material.This idea of using silica nanorods to load active molecules can also be extended to other fields,which can increase its application potential in certain fields.