Design, Preparation And Performance Of Organic-inorganic Composite Filter Materials

As an important component of the engine intake system, automotive filters can prevent particulate matter from getting into the engine effectively. This paper aimed to design and develop a kind of multi-functional organic-inorganic composite filter materials. The structure, composition and function of organic-inorganic composite filter materials were proposed and designed. Double-composite structure was combined with the gradient structure. Organic fibers and inorganic fibers were reasonably combined to increase the filtration performance. Far-infrared functional material was added to increase functionality.Base on the experimental and theoretical research, the formulation and preparation process of coating material were designed and organic-inorganic composite filters were developed. Then the thickness, pore size, air permeability, bursting strength and microstructure were characterized. The results showed that the proportion of air composite filter should be chosen as follows: dilution times of coating material is 5, and additon amount of sepiolite is 5%. The proportion of fuel composite filter should be chosen as follows: dilution times of coating material is 5, and Additon amount of sepiolite is 5%.The emissions of engine equipped with automotive filters which made by composite filter materials were tested. The results showed that the emission of carbon monoxide(CO),hydrocarbon(HC) and nitric oxide(NOx) was decreased. When gasoline engine was in high idle condition, the amount of CO in the emission reduced by 8.13%; The amount of HC reduced by 11.35%, and the amount of NOx reduced by 44.91%. At low idle condition, the amount of CO amount reduced by 0.43%; The amount of HC reduced by 1.14%, and the amount of NOx reduced by 85.67%. Diesel emissions of CO reduced by 32.26%; The amount of HC reduced by 3.28%, and the amount of NOx reduced by 4.66%.