Preparation And Properties Of Soil-based Polymer Anti-water Erosion Composite Materials

In recent years,with the progress of social development and economic development,deforestation and mine development have severely damaged the ecological environment and caused many environmental problems,such as sandstorms,soil erosion,mudslides,and land desertification.According to the investigation,the areas with the most serious soil erosion in our country are mainly the Northwest Loess Plateau.Due to sparse precipitation,arid climate,and low vegetation coverage,water and wind erosion are raging,resulting in a decline in land fertility,accelerated desertification,and safety of people's lives.Threats are also not conducive to sustainable social development and national stability and security.At present,domestic and foreign measures to control soil erosion mainly include engineering measures,biological measures and chemical measures,but they all have disadvantages such as long investment cycles,slow results,high costs,and environmental pollution.This paper adopts a chemical method with quick effect,good effect,and low cost.Firstly,natural polymer are used as raw materials for functional modification to synthesize high-viscosity,strong-stability emulsions and apply them to loess/laterite,the organic soil-based polymer water erosion resistance materials are prepared to investigate theirs water retention,water erosion resistance and compression resistance;secondly,the Cu residues and natural polymer are used as raw materials,using multiple sites in situ Polycondensation are used to prepare a soil-based polymer anti-water materials,and then inorganic materials and natural polymers are added to prepare an organic-inorganic composite soil-based polymer anti-water materials,which further improves theirs antiwater performance and are used in mine restoration.The specific content is as follows:1.In this experiment,an anti-water erosion material was studied.Using Artemisia Sphaerocephora Krash Gum(ASKG),Hydroxyethyl Acrylate(HEA)and Vinyl Acetate(VAc)as raw materials,free radical graft copolymerization is used to form a highviscosity emulsion-Artemisia Sphaerocephora Krash Gum-g-poly(hydroxyethyl acrylateco-vinyl acetate)(ASKG-g-P(HEA-co-VAc)).The structure and morphology of the product were characterized by FT-IR,XRD,TG-DTG,SEM and other technical means,and the reaction conditions were optimized.At the same time,it was combined with Laterite/Loess to make it resistant to water erosion.The material has been investigated for its water retention,water erosion resistance and compression resistance.The results show that ASKG-g-P(HEA-co-VAc)has good storage stability and thermal stability.the erosion rate of loess-based anti-water material is 100% after 20 hours of continuous rainfall with heavy rain level.Adding(0.40%)ASKG-g-P(HEA-co-VAc)laterite-based anti-erosion material,the compressive strength of reaches 1.90 MPa,which is about 3times that of pure laterite.2.Using flaxseed gum(FSG),hydroxyethyl acrylate(HEA)and vinyl acetate(VAc)as raw materials,ammonium persulfate(APS)as initiator,through free radical copolymerization into a graft copolymer of flaxseed gum-g-poly(Hydroxyethyl acrylateco-vinyl acetate)(FSG-g-P(HEA-co-VAc)).The graft copolymer was purified by solvent method,FT-IR,XRD,TG-DTG,SEM and other technical means were used to characterize the structure and morphology of the product,and the reaction conditions were optimized.At the same time,it was combined with Laterite/Loess combined with the preparation of anti-water erosion materials,and investigated its water retention,antiwater erosion properties and compressive properties.The results show that: FSG-g-P(HEA-co-VAc)exhibits good storage stability,storage stability and thermal stability.After adding(0.30%)FSG-g-P(HEA-co-VAc),the erosion rate of the loess-based anticorrosion material after 27 hours of continuous rainfall with heavy rain level reaches3.64%,while the water erosion resistance time of pure loess under the intensity of heavy rain in just 7 minutes,the compressive strength of the laterite-based water-resistant material with 0.30% FSG-g-P(HEA-co-VAc)added reaches 2.39 MPa,which is about3.5 times that of pure laterite.3.Welan gum(WG),acrylic acid(AA)and vinyl acetate(VAc)are used as raw materials,and ammonium persulfate(APS)is used as initiator to form a graft copolymer of Welan gum-g-poly(acrylic acid-co-vinyl acetate)(WG-g-P(AA-co-VAc))through free radical copolymerization.The graft copolymer was purified by solvent method,FT-IR,XRD,TG-DTG,SEM and other technical means were used to characterize the structure and morphology of the product,and the reaction conditions were optimized.At the same time,it was combined with Laterite/Loess combined with the preparation of anti-water erosion materials,and investigated its water retention,anti-water erosion properties and compressive properties.The results show that: WG-g-P(AA-co-VAc)exhibits good storage stability,storage stability and thermal stability.After adding 0.40% of WG-g-P(AA-co-VAc),the erosion rate of loess-based anti-water material is 7.23% after 13 hours of continuous rainfall with heavy rain level,while the anti-water erosion time of pure loess under the intensity of heavy rain in just 7 minutes,the compressive strength of laterite-based anti-corrosion materials with(0.40%)WG-g-P(AA-co-VAc)added to 1.68 MPa,which is about 2.5 times that of pure laterite.4.Using copper ore waste residues(Cu residues),high polymer 1(G1)and high polymer 2(G2)as raw materials,the soil-based polymer anti-water erosion material was prepared,and inorganic material 1(I1)and inorganic material 2(I2),preparing an organicinorganic composite soil-based polymer anti-water erosion material.The structure and morphology were characterized by FT-IR and SEM,and the water erosion resistance,compressive strength and particle size changes were tested.The results show that the compressive strength of G1-Cu residues with 0.40% of G1 is 1.60 MPa;when the amount of G1 is 0.20%,Cu residues: I1 or Cu residues: I2 is 5:1,G1-Cu residues(I1)The compressive strength can reach 2.90 MPa,and the G1-Cu residues(I2)can resist continuous precipitation of heavy rain for 31 h.