The Preparation And Performance Study Of HDPE/Rice Husk Foam Wood Plastics Composites

Foam Wood-plastic composite material(Foam Wood Plastics Composites,referred to FWPC)is based wood fiber(such as wood powder,straw,cotton stalk powder,bamboo powder,fruit powder)as the main component,after pretreatment with the thermoplastic resin(PE,PP,PVC,PS etc.),and adding foaming agents(AC/ZnO,NaHCO3 etc.)to foam to a new eco-friendly composite material.This paper adds different kinds of foaming agents and flame retardants to make The Foam Wood Plastics Composite,using modern analysis and testing technology and the traditional test method,studied the effect of different kinds of foaming agents and no halogen flame retardants to the Foam Wood Plastics Composite's flame retardation and mechanical property.This paper use HDPE and rice husk as main raw material,adding various foaming agents(AC,NaHCO3,AIBN)and processing aids.Part of composites add flame retardant(App,MH,OMMT)to study its flame retardation.Use hot press molding process to make HDPE/rice husk wood plastics composites,and through the experiment measure its mechanical properties,water absorption,coefficient of thermal conductivity and the microcosmic figure analysis and thermal residual analysis.Though the experiment on these composite material show that:(1)The experiment result of using AC to foam HDPE/rice husk foam wood plastics composite shows:using lwt%AC,the composite materials' mechanical properties and waterproof properties is good,but its thermal insulation properties is bad.When using 1.5wt%AC,the composite materials' thermal insulation properties is best,but its mechanical properties and waterproof properties declined.Given the economy,AC content is between 1wt%and 1.5wt%its thermal residual carbon rate is high,and the mechanical performance and physical properties are excellent.(2)Using NaHCO3 to foam HDPE/rice husk foam wood plastics composite,by adding different content of NaHCO3 to prepare a series of composite materials,and experiment the composite materials which content different amount NaHC03,to test its mechanical properties,waterproof properties,and physical characteristics etc.The result shows using 1.5wt%NaHCO3,its thermal residual carbon rate is high,and its mechanical properties,insulating power and waterproofness is good.Comprehensive performance is good.(3)Using AIBN to foam HDPE/rice husk foam wood plastics composite,by adding different content of AIBN to prepare a series of composite materials,and experiment the composite materials which content different amount AIBN,to test its mechanical properties,waterproof properties,and physical characteristics etc.The result shows:Compared the above two kinds of foaming agents' foaming condition to the composite material and various performance,using AIBN to foam HDPE/rice husk foam wood plastics composite' foaming effect is worse than the other two,when decomposition,AIBN itself produces harmful gas which is bad for human body and environment.So without considering the cost does not suggest use AIBN to foam HDPE/rice husk foam wood plastics composite.(4)Using 1.5wt%NaHCO3 as foaming agent to foam HDPE/rice husk foam wood plastics composite,adding differ content of APP as fire retardant,check the composite material with different content of APP' mechanical properties,waterproof properties,and physical characteristics.The result shows:using less than 10wt%APP,adding a small amount of APP is good for composite material' mechanical properties,over 10wt%,APP will have bad affect for composite material' mechanical properties,and its waterproof properties is falling too,add more APP composite material' water-absorbing quality is rising,but the contact angle is falling.Heat conductivity coefficient is lowest when using 10wt%APP.So on the basis of the results above,when using 10wt%APP composite material' performance is best.(5)Using 1.5wt%NaHCO3 as foaming agent to foam HDPE/rice husk foam wood plastics composite,adding different content of MH as fire retardant,check the composite material with different content of MH' mechanical properties,waterproof properties,and physical characteristics.The result shows:when using 10wt%MH,the composite material' thermal residual carbon rate is high,mechanical properties and waterproof properties is good.(6)Using 1.5wt%NaHC03 as foaming agent to foam HDPE/rice husk foam wood plastics composite,adding different content of OMMT as fire retardant.Check the composite material with different content of OMMT' mechanical properties,waterproof properties,and physical characteristics.Result shows:using lwt%OMMT flame retardant foam wood plastics composite its tensile strength and bending strength is best.While its hardness and water proofing property is best when OMMT is 5wt%impact strength is highest when the content of OMMT is 5wt%.But the content of OMMT increase has an adverse effect on the material of the heat preservation performance,consider the economy and all the performance above,OMMT should less than 3wt%.(7)Using 1.5wt%NaHCO3 as foaming agent to foam HDPE/rice husk foam wood plastics composite,Adding different proportions of HDPE and rice husk preparation a series of composite materials,to experiment these composite material check mechanical properties,waterproof properties,and physical characteristics of these composite material.The result shows:when HDPE:rice husk is 40wt%:60wt%the composite's thermal residual carbon rate is high,mechanical properties and waterproof properties is good.Comprehensive performance is good.