Study On Preparation And Performance Of High Oil Absorbing Resin/Polyurethane Composite

Oil spill accidents caused by damaged oil storage containers or oil pipelines have caused serious environmental pollution and waste of resources.In order to avoid the leakage of oil in the container or pipeline,the high oil-absorption resin was compounded with polyurethane elastomer to prepare a composite material that can absorb oil and self-repair after damage,using the volume expansion property of high oil-absorption resin after oil-absorbing.The research contents of this paper were as follows:Firstly,an acrylic ternary high oil-absorption resin was synthesized by suspension polymerization process,its structure and thermal stability were characterized respectively.The effect of particle size and temperature on the oil-absorption performance of the high oilabsorbing resin was explored respectively.The results showed that the smaller the particle size of the high oil-absorption resin,the faster the oil-absorption rate,while the saturated oilabsorption rate was almost unchanged.When the ambient temperature was low,the saturated oil-absorption rate and oil-absorption rate of the high oil-absorption resin were low.The increasing of the temperature speeded up the oil-absorption rate of the high oil-absorption resin.When the temperature reached 70℃,it only took 5 minutes to achieve absorption saturation for kerosene,and the saturation oil-absorption rate was 11.59 g/g.Secondly,the synthesized high oil-absorption resin was compounded with the polyurethane matrix via the blending manner to prepare a series of high oil-absorption resin/polyurethane composite materials.The effects of high oil-absorption resin on the mechanical properties and repair properties of composites were explored.The results showed that the larger the particle size of the high oil-absorption resin at room temperature,the higher the Young’s modulus of the composite material,and the lower the tensile strength and elongation at break.The higher the content of the high oil-absorption resin in the composite material,the higher the Young’s modulus,the lower the tensile strength and elongation at break.The higher the content of high oil-absorption resin in the coating,the better the repair effect.When the content of high oil-absorption resin reached 25 wt%,a 1.5 mm diameter gap can be repaired only need 1 min.Finally,the effects of oil immersion time,temperature,and accelerated aging time of xenon lamps on the mechanical properties of the high oil-absorption resin/polyurethane composite were explored.The results showed that the swelling degree of polyurethane matrix in diesel was relatively low,the swelling degree of composite materials was relatively high,resulting in poor mechanical properties.The elongation at break of polyurethane decreased from 437%before oil immersion to 233% after 28 days of oil immersion,and the elongation at break of the composite material containing 15 wt% high oil-absorption resin decreased from 278% to 130%after oil immersion for 28 days.When the ambient temperature was lower than the glass transition temperature of polyurethane,polyurethane and composite materials transform into rigid materials showing strong and brittle mechanical properties.When the ambient temperature rised to 70°C,both the strength and elongation at break of the materials decreased.The aging of the xenon lamp increased the degree of curing of the matrix and increased the hardness and strength of the material.When the aging reached a certain level,the chemical bond in the matrix broak and the elongation at break also decreased.