A5100746178- Polymer composites and self-healing
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Advanced Polymer Synthesis and Characterization
- Transition Metal Oxide Nanomaterials
- Advanced Battery Materials and Technologies
- Gas Sensing Nanomaterials and Sensors
- Carbon dioxide utilization in catalysis
- Advanced Sensor and Energy Harvesting Materials
- Photopolymerization techniques and applications
- Epoxy Resin Curing Processes
- ZnO doping and properties
- Lignin and Wood Chemistry
- Magnetic properties of thin films
- Surface Modification and Superhydrophobicity
- Polymer Nanocomposites and Properties
- Flame retardant materials and properties
- Advanced Battery Technologies Research
- Fiber-reinforced polymer composites
- High-Voltage Power Transmission Systems
- Marine Bivalve and Aquaculture Studies
- Copper-based nanomaterials and applications
- Additive Manufacturing and 3D Printing Technologies
- Magnetic Properties of Alloys
Xi'an Jiaotong University
2016-2025
Guangdong Institute of New Materials
2020-2023
Guangdong Academy of Sciences
2020-2023
Zhejiang Ocean University
2023
Nanyang Technological University
2020-2021
China XD Group (China)
2019-2020
South China University of Technology
2020
Institute of Oceanographic Instrumentation
2020
Shandong Academy of Sciences
2020
Qilu University of Technology
2020
Both environmental and economic factors have driven the development of recycling routes for increasing amount composite waste generated. This paper presents a new paradigm to fully recycle epoxy‐based carbon fiber reinforced polymer (CFRP) composites. After immersing in ethylene glycol (EG) temperature, epoxy matrix can be dissolved as EG molecules participate bond exchange reactions (BERs) within covalent adaptable network (CAN), effectively breaking long chains into small segments. The...
An epoxy ink and its 3D printing method were developed to allow printed parts be recycled reprinted.
Thermosetting polymers and composites are a class of high-performance materials with significant industrial applications. However, recycling thermosets their filling matters significantly challenging. Here, we propose method to recycle epoxy thermosetting polymer efficiently by synergistic effect solvent mixture using highly efficient organic catalyst at an ordinary pressure mild temperatures. The anhydride-epoxy network depolymerization enabled selective ester bond cleavage process is...
Covalent adaptable networks (CANs; also known as dynamic covalent or vitrimers) are appealing for developing simple and efficient techniques recycling thermosetting polymers. In this paper, ethylene glycol (EG) is used a solvent to enable pressure-free surface welding, repair, of malleable epoxy where the transesterification-type bond exchange reaction (BER) imparts nature network. At high temperature, EG molecules participate in BER, leading dissolution If allowed evaporate, dissolved can...
Abstract Linear chains in thermoplastics make them relatively weak performance but inherently weldable and recyclable. By contrast, thermosets with permanently crosslinked networks possess outstanding mechanical performance, thermal, chemical stability, are unweldable unrecyclable. In the last decade, a kind of thermoplastics‐like termed as vitrimer has been developed extensive applications, which welding vitrimers plays central fundamental role. Herein, we present current state art discuss...
Thermoset dissolution based on degradable bond or exchange reaction has been recently utilized to achieve thermosetting polymer and recycling. In this paper, an industrial grade epoxy thermoset was as a model system demonstrate the via solvent assisted transesterification (or alcoholysis) with high efficiency under mild conditions. The anhydride-cured depolymerized by selective ester cleavage in 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD)-alcohol solution below 180 °C at ordinary pressure less...
Abstract With the increasing amount of electronic waste (e-waste) generated globally, it is an enormous challenge to recycle printed circuit boards (PCBs) efficiently and environmentally friendly. However, conventional recycling technologies have low efficiency require tough treatment such as high temperature (>200 °C) pressure. In this paper, a small-molecule assisted approach based on dynamic reaction was proposed dissolve thermosetting polymers containing ester groups components from...
Tungsten oxide (WO3) is widely used as a functional material for “smart windows” due to its excellent electrochromic properties, however it difficult overcome the conflict between optical modulation and cyclic stability. In this work, WO3 thin films with different crystal structures were prepared by DC reactive magnetron sputtering method. The effects of substrate temperature on structure, composition, properties investigated. results show that crystallinity film increases increasing...
Abstract The chemically crosslinked network structures make epoxies, the most common thermosets, unable or hard to be recycled, causing environmental problems and economic losses. Epoxy‐based vitrimers, polymer networks deriving from epoxy resins, can thermally malleable according bond exchange reactions (BERs), opening door recycle thermosets. Here a series of experiments were carried out study effects processing conditions (such as particle size distributions, temperature, time, pressure)...
Vitrimer, a class of covalent dynamic networks, is promising for polymeric applications requiring reshaping, recycling, and self-healing. The bonds in vitrimer can be reversibly broken reformed under thermal actuation. This work investigates the effects temperature on fracture toughness soft epoxy vitrimers. We measured above topology freezing temperature. Elevated temperatures reduce both stretch toughness, while they linearly increase modulus. Given invariant cross-linking density,...
Covalent adaptable network (CAN) polymers can rearrange their macromolecular by bond exchange reactions (BERs), where an active unit attaches to and then replaces a in existing forms new bond. When such events occur on the interface, they contribute surface welding, self-healing, recycling of thermosetting polymers. In this paper, we study interfacial welding failure CANs involving both normal shear stresses. To do this, incorporate our recently developed multiscale model for with cohesive...
The effects of particle size, temperature, time, and pressure on the mechanical properties regenerated epoxy-acid vitrimers were investigated, which helped to refine vitrimer reprocessing condition parameter toolbox.
Anisotropic polymers with aligned macromolecule chains exhibit directional strengthening of mechanical and physical properties.