Study On The Recycling Of Waste Epoxy In E-waste

E-waste is generated in the process of consumption of various waste electrical and electronic products.The continuous information technology innovation and market demand expansion will accelerate the replacement of electronic products,and they also bring a large amount of E-waste. Because of embedded thermosetting plastic with non-melting and insoluble characteristics,there is still no economic and effective way to recycle them at home and abroad currently.And most of them have to be buried in landfills or incinerated,which will not only take up a lot of land resources,but also cause secondary pollution because of a variety of harmful substances.By the component analysis results of IR spectroscopy and scanning electron microscopy,the E-waste powder used in this item is mainly composed of thermosetting epoxy resin and silica filler. In the blending process,due to the role of temperature and friction and so on,the hydroxyl,epoxy, carbonyl,alcohol and other polar oxy group from curing epoxy resin and silica filler will reaction with resin polarity PVC,and furthermore it will improve the compatibility between the PVC and the waste epoxy.So it is feasible that waste epoxy resin and PVC can be blended to prepare composite material.Therefore,this item has proposed a method of blending to carry out the study on the recycling of E-waste.Take the epoxy E-waste which has the main market share as an example,it will be blended with polyvinyl chloride(PVC) to prepare the composite materials. Such tools as scanning electron microscopy,infrared spectroscopy,thermal gravimetric analysis, and differential scanning calorimetry(DSC),gas chromatography mass spectrometry(GC-MS) analysis will be adopted to observe the micro-morphology of raw materials and composite materials which will help to conduct the study the feasibility study of blend.On the basis of the feasibility study,the waste epoxy resin will be dried,and it will be mixed with polyvinyl chloride and related additives in a high-speed mixer,then it will be plasticized by the torque rheometer,at last it will be molded by the hydraulic press to produce composite sample. We not only study the tensile properties and impact properties by analyzing the effects of waste epoxy resin powder mesh,temperature and speed of rheometer,temperature and pressure of hydraulic press,type and addition amount of stabilizer type and addition amount of lubricant,type and addition amount of other auxiliary to the composite materials processing,but also optimize blend formulation and processing parameters.To improve the utilization of waste epoxy resin, mainly considering the waste epoxy resin powder mixed with PVC as 7:3,the best formula and process parameters is:when waste epoxy is added with 80 mesh;205℃of torque rheometer processing temperature,45rpm rotation,15MPa hydraulic pressure,temperature of 185℃,added with Ca-Zn stabilizer 3 portion;added with stearic acid 1 portion;added with acrylic ester 2 portion,added with chlorinated polyethylene 2 portion,77.73kJ/m~2 the tensile strength,4.8MPa impact strength,the needs of related products standard "wood-plastic composite sheet extrusion "(The People's Republic of China Forestry Industry Standard LY/T1613-2004) can be met. Furthermore,it greatly improved the utilization of obsolete electronic components.The topics of research results not only greatly improved the utilization of waste epoxy resin with a high practical value,but also provide an important reference value for the recycling of other thermoset waste.