Synthesis and properties of acrylate grafted sodium lignosulfonate copolymer iotion soil curing agent
In order to study the organic polymer soil curing agents with strong stability,economic and envi-ronmental protection,and good water resistance,acrylic acid(AA),butyl acrylate(BA),styrene(St)were selected as the functional monomers,and graft copolymerization was carried out with sodium lignosulpho-nate(SLS),and the reactive emulsifiers ANPEO10 and DNS-86 were used to enhance the emulsification efficiency and stability,and the pre-emulsification semi-continuous dosing and seed emulsion methods were adopted for the grafting reaction.A new type of polymer emulsion soil curing agent PAAB and PAAS was produced by grafting reaction using pre-emulsification semi-continuous charging method and seed e-mulsion method,and its structure was characterized and performance tested.The results show that the pol-ymer emulsion performance is stable TSI are less than 0.2;added to the cured soil,its crosslinked mesh structure encapsulates the soil particles,the functional groups in the emulsion and the soil cation bonding,the formation of gel substances,cured soil/water surface contact angle can reach 91.68,99.21,PAAS cured soil after seven days of maintenance compressive strength of 368.4 kPa,reducing the sample soil expansion and the effect of freeze-thaw cycle on cured soil was reduced.
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