Application of glass-nonmetals of waste printed circuit boards to produce phenolic moulding compound.
The aim of this study was to investigate the feasibility of using glass-nonmetals, a byproduct of recycling waste printed circuit boards (PCBs), to replace wood flour in production of phenolic moulding compound (PMC). Glass-nonmetals were attained by two-step crushing and corona electrostatic separating processes. Glass-nonmetals with particle size shorter than 0.07 mm were in the form of single fibers and resin powder, with the biggest portion (up to 34.6 wt%). Properties of PMC with glass-nonmetals (PMCGN) were compared with reference PMC and the national standard of PMC (PF2C3). When the adding content of glass-nonmetals was 40 wt%, PMCGN exhibited flexural strength of 82 MPa, notched impact strength of 2.4 kJ/m(2), heat deflection temperature of 175 degrees C, and dielectric strength of 4.8 MV/m, all of which met the national standard. Scanning electron microscopy (SEM) showed strong interfacial bonding between glass fibers and the phenolic resin. All the results showed that the use of glass-nonmetals as filler in PMC represented a promising method for resolving the environmental pollutions and reducing the cost of PMC, thus attaining both environmental and economic benefits.
Guo
Jie
J
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, PR China.
Rao
Qunli
Q
Xu
Zhenming
Z
D003247:Conservation of Natural Resources; D004581:Electronics; D004853:Epoxy Resins / Q000737:chemistry*; D005557:Formaldehyde / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D011078:Polychlorinated Biphenyls; D011108:Polymers / Q000737:chemistry*; D014866:Waste Products
D004853:Epoxy Resins; D010636:Phenols; D011108:Polymers; D014866:Waste Products; C009753:fiberglass; D005557:Formaldehyde; C011529:phenol-formaldehyde resin; D011078:Polychlorinated Biphenyls