Study On Application Of Municipal Solid Waste Incineration Bottom Ash In Polymer Matrix Composites

The problem of municipal waste disposal has become more and more serious.Waste incineration power generation technology has become an effective method to cope with the growing urban solid waste.The bottom ash of incinerated waste accounts for 80%-90% of the remaining quality.The high value-added resource research has become the focus of social research.In this paper,silane coupling agent(KH570) and isophorone diisocyanate(IPDI)were used to modify the municipal solid waste incineration bottom ash(BA)to increase its compatibility in the polymer,and the modified bottom ash was used as a polymer.Polyurethane(PU),interpenetrating polymer network(IPN)filler,comparative analysis of infrared spectrum and thermal stability of modified products,preparation of corresponding polyurethane,interpenetrating polymer network composites,study of the composition of modified bottom ash And the influence of structure on the mechanical properties and thermal properties of polyurethane and interpenetrating polymer networks,and finally the polymer composites with excellent comprehensive properties were prepared.Through water washing and acidification treatment,two modified bottom ash were obtained by surface modification with KH570 and IPDI.The results showed that KH570 and IPDI were successfully wrapped on the surface of BA,and the surface modification did not change the crystal structure of BA.BA is mainly composed of porous structures and irregular particles with a rough surface,and the diameter is about 15 to 45 μm.After KH570 and IPDI modification,oligomers are wrapped on the surface of BA.For the castor oil-based polyurethane/KH570-BA composite,the dispersion of KH570-BA in the PU matrix is relatively uniform.Compared with BA,the tensile strength and Young’s modulus of PU composites increased with the increase of KH570-BA loading.When the KH570-BA was loaded at 6%,an increase in tensile strength of 36.1% and an increase in Young’s modulus of 36% were obtained.In addition,with the addition of KH570-BA,the thermal stability of PU/KH570-BA composites improved slightly with the increase of KH570-BA loading.The residual amount of PU composites at 600 ℃ increased from 0.7 to 9.2%.In the castor oil-based PU/EP IPN composites,the thermal performance test results show that the addition of IPDI-BA improves the thermal stability of the composite.When the loading of IPDI-BA is 4%,the initial decomposition temperature increases by 31.8.℃,when the loading of IPDI-BA is 6%,the amount of residue at 600 ℃ is increased by 57.1%.The mechanical properties test showed that the addition of IPDI-BA improved the tensile properties.However,with the addition of IPDI-BA,the tensile strength increased first and then decreased.When 3wt% IPDI-BA was added,the tensile of IPN composites was observed.The maximum strength reached 63.2%,the Young’s modulus reached a maximum value of 45.9%,the bending strength reached a maximum value,an increase of 26.7%.When 1wt% IPDI-BA was added,the elongation at break of IPN reached the maximum.,an increase of 21.8%.It can be observed that when the amount of IPDI-BA added is less than 3%,the dispersibility is relatively uniform,and the amount of addition is too large,and aggregation is easy.