Fabrication and Mechanical Properties of High-Durability Polypropylene Composites via Reutilization of SiO2 In-Situ-Synthesized Waste Printed Circuit Board Powder

Abstract

This paper focuses on the characterization of the physico-chemical properties, surface modification, residual copper content and in situ hybrid inorganic particle modification of polypropylene (PP) composites reinforced by waste printed circuit board powder (WPCBP). A series of WPCBP/SiO2 hybrids (TSW) were prepared by a sol–gel method at different pH values. Characterization results revealed the in situ generation of SiO2 on the surface of WPCBP, and showed that with an increase in pH value, the size of SiO2 particles increased gradually and the copper content decreased in the TSW powder. The mechanical properties, oxidation induction time (OIT) and thermal properties of PP composites were improved by reinforcement with TSW, which might be ascribed to the formation of serrated interfaces. This work not only develops a powerful method to enhance the properties of PP/WPCBP composites, but also provides an environmentally sustainable approach to the high-added-value reutilization of WPCBP.

Property Enhancement of Waste Printed Circuit Boards Powders Reinforced Polypropylene by In Situ Magnesium Hydroxide Impregnation from Waste Lye

“…This result was consistent with the mechanical properties of the hybrid modified PP blends in Section 3.5 and Section 3.6 . After hybrid modification, the interface bonding performance between the MW and the matrix was significantly improved [ 14 ]. When the composite material was subjected to external forces, the stress was transmitted to the WPCBP through the magnesium hydroxide, leading to a significant improvement in performance of the PP blends.…”

“…Traditional chemical methods for treating copper are mainly ammonia liquid dissolution, alkali liquid leaching, acid with an oxidant method, etc. [ 14 , 15 ]. However, these methods generate a large amount of waste liquid during the pretreatment process [ 15 ], causing serious secondary pollution, thereby restricting their industrial application.…”

Development and Characterization of Polymeric Composites Reinforced with Lignocellulosic Wastes for Packaging Applications

“…It can also be inferred that bonding between fiber and matrix plays an important role. The stronger bonding indicates no voids and cracks in the sheet, resulting in less susceptibility to water damage [22]. Initially, the swelling was constant for some time, after which there was an abrupt change.…”

Synthesis, Characterization and Performance of Materials for a Sustainable Future

“…Another current challenge related to the management of environmental pollution concerns the recycling and reuse of waste-printed circuit boards (WPCBs). He et al [ 9 ] presented a method for improving the durability and mechanical properties of WPCB-reinforced polymer composites, demonstrating that their hybridization with SiO 2 enhanced tensile strength, flexural strength and flexural modulus with respect to the unmodified system. Those properties affected the impact strength when combined in a polypropylene-based matrix, showing results 28.8% higher than its untreated counterpart owing to the serrated interface.…”