| With the extensive use of electronic products, production of electronic waste is increasing,the corresponding waste printed circuit board is also growing rapidly, and the electronicwaste content of non-metallic components can reach more than60%,of which a thermosettingepoxy resin accounted for a large proportion, if these non metal components usedcompletely, can not only ease the pressure of waste disposal, prevent secondary pollution, butalso can reduce the cost of materials, with considerable economic and environmental significance.Based on our previous studies on the further optimization of waste formula of compositematerial of epoxy resin in this paper. Infrared spectroscopy (FT-IR), inductively coupled plasmaatomic emission spectrometry were used to study the reaction mechanism, the feasibility ofimproving the properties of composites by carbon nano-tube was explored, and the waste epoxyresin composite material prepared by a series of comprehensive performance test, the followingconclusions were followed:1. By comparing the infra-red between waste epoxy resin (W-EP), PVC and W-EP/PVCcomposite, infer that there has graft reaction between the two substances, radical reaction has beenfound between the PVC molecules and the epoxy, alkyl in epoxy resin matrix in different degrees.2. During the pretreatment process of the waste epoxy resin material, adding a certainproportion of carbon nano-tube (CNTS), to explore the feasibility of optimizing the properties ofcomposite materials. Results showed that the mechanical properties of composite materials withthe increase of the added amount of CNTS showed a downward trend after the first rise, whenthe CNTS content is0.2%, the mechanical properties of the material achieve optimal, at this timeof the bending strength, the tensile strength, the impact strength is94.37MPa,43.0MPa and13.875KJ/㎡, respectively; compared without CNTS increased by30%,17.49%,4.13%,respectively. When the CNTS at a certain amount, by controlling the time of ultrasonicpretreatment on the mixed material of CNTS and W-EP, found that the mechanical strength of thecomposite material decreases with the ultrasonic time increased after the first rise, when the ultrasonic time was0.5h, mechanical properties obtain the optimum.3. The heavy metals in waste epoxy resin material were analyzed by using inductivelycoupled plasma atomic emission spectrometry (ICP-AES), including Cu, Zn, Ni,Cr, Pb leachingrate of1.2148mg/L,1.3092mg/L, respectively0.013mg/L,0.12mg/L,0.005mg/L, far less than thelimit value100mg/L、100mg/L、5mg/L、5mg/L、15mg/L in GB5085.3-2007” the hazardouswaste identification extraction toxicity identification standards”, indicated that the content ofheavy metals in materials meet the standard requirements.4. Formaldehyde emission is a very important target for indoor building of the compositematerial, the index of composite material was tested by desiccator method. It was found that theformaldehyde emission for0.536mg/L of composite materials is far less than the E1standard ofWood-based panels, plywood, decorative veneer plywood and Joinery board in the "formaldehydewood-based panel interior decoration materials and products in limited release"(GB18580–2001),can be directly used for the indoor building materials.5. The thickness swelling rate,dimensional stability and internal bond strength of compositematerials were tested by the methods in the "Test methods of evaluating the properties ofwood-based panels"(GB/T17657-2013). The results show that the thickness swelling rate,dimensional stability of composite materials prepared by this experiment were0.57%and0.07%,met the limit requirements of3%and0.25%in the GB/T7911-2013"thermosetting resinimpregnated paper decorative high-pressure laminates (HPL)".And the2.013MPa of internal bondstrength met the limit value of0.8MPa in the GB/T18102-2007"laminate flooring".This research had practical implications that not only improved the comprehensiveperformance of waste epoxy resin composite material, but also explored the feasibility of usingwaste recycled materials prepared epoxy resin used for interior decoration materials. |
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