COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.9
Qiang Zhang,Bo Wu,Yujun Chen,Guiquan Liao,Xiaoqiong Xie,Yu-Zhong Wang
The extensive use of flame-retardant polyester composites, notably polybutylene terephthalate (polybutylene terephthalate, PBT), has resulted in a growing accumulation of non-biodegradable plastic waste, posing significant challenges to both environmental sustainability and resource recovery. These materials, which contain brominated flame retardants and inorganic fillers, are resistant to conventional recycling methods, contributing to long-term ecological risks. In this study, we propose a comprehensive chemical recycling strategy for post-consumer flame-retardant PBT composite materials (PBT-FrCM), integrating staged depolymerization, solvent extraction, and monomer purification to achieve efficient recovery and reuse of all major components. The recovered monomer, bis(4-hydroxybutyl) terephthalate (BHBT) (99.7% purity), brominated flame retardants (99% recovery), and inorganic fillers were successfully reintegrated into regenerated flame-retardant PBT composites (rPBT-FrCM) that exhibit mechanical and flame-retardant properties comparable to those of virgin materials. Life cycle assessment demonstrates that the process reduces greenhouse gas emissions, while highlighting energy consumption and solvent toxicity as key areas for improvement. An economic evaluation indicates that recycling 1 tonne of waste PBT generates a net value of 5041 CNY, illustrating the dual environmental and economic benefits of this approach. These findings underscore the potential of closed-loop upcycling for engineering plastics and provide a scalable pathway toward a more circular, climate-resilient material economy.
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DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
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2025
·
IF 5
Yani Chen,Haiyu Qiao,Ning Jiang,Yayun Liu,Fanshuo Jia,Chuanyang Wang
High-quality plastic joining techniques using welding are urgently required in many engineering areas. Controlling morphology formation in joints plays an important role in the final quality, but relatively controlling methods are still challenging. In this paper, we propose an in-situ formed mechanical riveting structure between polycarbonate (PC) and polybutylene terephthalate reinforced with 10 % glass fiber (PBT/GF), which is induced by dual-wavelength through a home-made setup. First, the spectral properties of PC and PBT/GF are investigated to analyze optical differences at wavelengths of 980 nm and 1710 nm. Morphological characterizations reveal a significant number of glass fibers migrated across the interface and reached the PC side, forming a robust mechanical structure. These migrated glass fibers, serving as a mechanical rivet, could increase the tensile performance of the joints along with interfacial fusion bonding. Furthermore, the simulated temperature field indicates that employing a 980 nm laser effectively increases the welding temperature while preventing the thermal decomposition of the materials. The tensile test results show that the maximum tensile force using the 1710-PC//980-PBT/GF welding method, reaching 29.80 %, 20.40 %, and 111.3 % higher than that of 980-PC, 1710-PC, and 980-PC//1710-PBT/GF joints. And the corresponding displacement achieves 2.0-fold, 1.5-fold, and 4.0-fold increases compared to the above control groups. The fracture surface of the substrate and interfacial failure validate that the improved mechanical performance of joints could be attributed to the formation of a mechanical riveting structure. This paper verifies that dual laser beams could properly regulate the welding temperature field, control the morphology, and enhance the joint’s final performance.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2020
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IF 2.904
Ying Lu,Hui Sun,Jinyu Cheng,Jokwang Myong,Hasan Md Mehedi,Gajanan Bhat,Bin Yu
Flexible strain sensors have attracted wide attention to the field of applications on wearable electronic devices. However, they still have numerous defects, such as low linearity and low sensitivity. In this paper, high-elastic polybutylene terephthalate (PBT) melt-blown non-woven fabric (MB) was chosen as the substrate of the strain sensor. The reduced graphene oxide (rGO) and silver nanowires (AgNWs) were loaded on the PBT MB surface by simple ultrasonic treatments to form a dense and stable conductive path. The sensing properties of the sensors loaded with the different concentration load ratios of rGO and AgNWs were studied and the best load ratio was 1:0.9. The results showed that the sensor has excellent sensing characteristics, including wide range of applications (90 %), extremely high sensitivity (guage factor (GF) up to 1829 at 80 % strain). Finally, the strain sensor has demonstrated in monitoring an assortment of human-exercises even some subtle physiological signals.
研究领域:
材料科学
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电子工程
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生物医学工程
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DOI
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 40
·18464-18473
·
IF 2.562
Jian Zhou,Zhiqiang Jiang,Zongbao Wang,Jianqiang Zhang,Jun Li,Ya Li,Junwu Zhang,Peng Chen,Qun Gu
A series of poly(L-lactide)-b-poly(butylene terephthalate)- b-poly(L-lactide) (PLA-b-PBT-b-PLA) triblock copolymers were synthesized via ring-opening polymerization of L-lactide with hydroxyl-functionalized poly(butylene terephthalate) (HOPBT) as macroinitiator and stanneous 2-ethylhexanoate (Sn(Oct)2) as the catalyst in 1,1,2,2-tetrachloroethane (TCE). The conversion of L-lactide was high and the PLA block in the copolymers showed high optical purity. Chemical structure and physical properties of the triblock copolymers were studied using NMR, GPC, DSC, and WAXD. The block structure of the copolymers was confirmed using NMR, and each block formed the same crystal type as the respective homopolymer, i.e., PLA or PBT as revealed by DSC and WAXD. The copolymer, even at a very low content (5 wt%), showed an unexpected favoring effect on the crystallization of PLA, which made it a potential polymeric nucleating agent for PLA.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Peng Luo,Tao Deng,Di Cai,Youbing Li,Tian Xia
Plastic-Metal hybrids have gained significant attention in automotive and aerospace fields. In the study, the silane was introduced on the surface of anodized micro-nano porous aluminum alloy (Al) plate. The silanized Al sample was then joined with polybutylene terephthalate (PBT) specimen by ultrasonic-assisted hot pressing technology to manufacture hybrid. The interfacial physical embedding structure plays an important role in plastic-metal joining and the scanning electron microscope (SEM) results demonstrated that effective mechanical interlocking was achieved between PBT and Al. X-ray Photoelectron Spectroscopy (XPS) results demonstrated the new chemical bonds occurred at the PBT-Al interface, which acted as bridges in the PBT-Al interface joining. Due to synergistic effect of physical embedding and chemical bonding, the maximum adhesion strength reached 36.3 MPa when the silane concentration was 4 %, which was 37 % higher than that without silane treatment. When the silane concentration exceeds 4 %, leading to blocking pores on the anodized aluminum alloy surface, resulting in a decrease in adhesion strength. In conclusion, these results can provide some ideas and help for the development of subsequent plastic-metal hybrids and practical applications.
研究领域:
材料科学
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塑料-金属复合技术
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表面工程
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粘接技术
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制造工艺
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Han Hu,Chen Lin,Qingyang Luan,Xiaoyu Jiang,Xiaoqin Zhang,Qianfeng Wang,Yunxiao Dong,Jing Wei,Jinggang Wang,Jin Zhu
Biodegradable polymers tend to undergo relatively slow degradation under natural conditions, facing challenges in ecofriendly applications. The copolymerization modification of the amorphous region of aliphatic–aromatic copolyesters has become an effective method to juggle outstanding comprehensive performance and adjustable degradation. Herein, a series of poly(butylene succinate diglycolate terephthalate) (PBSDT) copolyesters were successfully prepared, realizing synergistic modification of the amorphous phase with diglycolic acid and succinic acid. In detail, PBS40D10T to PBS10D40T were designed to explore the differences in molecular characteristics and properties. We find that the similarity of these two segments reflected in segmental rigidity and domain size, also displaying comparable melting temperature and mechanical properties. The PBSDT copolyesters exhibited higher melting temperature (>141 °C), elastic modulus (>120 MPa), and tensile strength (>25 MPa) than commercial PBAT. Their gas barrier performance achieved 20 times better than PBAT and 4 times better than PLA, also being superior to that of PBAT/PLA blends. The differences of two comonomers were mainly attributed to the oxygen heteroatom of diglycolic acid, reflected in the hydrophilicity and stronger intermolecular interactions, which significantly influenced their crystal growth rate and environmental degradation. Especially, the isothermal crystallization rate (minimum t1/2 < 15s) was the fastest among reported aliphatic–aromatic copolyesters. In addition, the degradation behavior clarified that the preferentially depolymerized diglycolate can be a decisive factor in controlling the degradation rate. Remarkably, synergistic modification by diglycolic acid and succinic acid endowed the access to enhanced hydrolytic degradability in a natural environment, without sacrificing the thermal, mechanical, and gas barrier properties. This work provides a new direction for the high strength-toughness green packagings and alternatives to PBAT with tunable degradation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 2
·70
·
IF 3.504
San-E Zhu,Li-Li Wang,Hao Chen,Wei Yang,Anthony Chun-Yin Yuen,Timothy Bo-Yuan Chen,Cheng Luo,Wen-Mei Bi,En-Zhu Hu,Jian Zhang,Jing-Yu Si,Hong-Dian Lu,Kun-Hong Hu,Qing Nian Chan,Guan Heng Yeoh
High-performance poly(1,4-butylene terephthalate) (PBT) nanocomposites have been developed via the consideration of phosphorus-containing agents and amino-carbon nanotube (A-CNT). One-pot functionalization method has been adopted to prepare functionalized CNTs via the reaction between A-CNT and different oxidation state phosphorus-containing agents, including chlorodiphenylphosphine (DPP-Cl), diphenylphosphinic chloride (DPP(O)-Cl), and diphenyl phosphoryl chloride (DPP(O3)-Cl). These functionalized CNTs, DPP(Ox)-A-CNTs (x= 0, 1, 3), were, respectively, mixed with PBT to obtain the CNT-based polymer nanocomposites through a melt blending method. Scanning electron microscope observations demonstrated that DPP(Ox)-A-CNT nanoadditives were homogeneously distributed within PBT matrix compared to A-CNT. The incorporation of DPP(Ox)-A-CNT improved the thermal stability of PBT. Moreover, PBT/DPP(O3)-A-CNT showed the highest crystallization temperature and tensile strength, due to the superior dispersion and interfacial interactions between DPP(O3)-A-CNT and PBT. PBT/DPP(O)-A-CNT exhibited the best flame retardancy resulting from the excellent carbonization effect. The radicals generated from decomposed polymer were effectively trapped by DPP(O)-A-CNT, leading to the reduction of heat release rate, smoke production rate, carbon dioxide and carbon monoxide release during cone calorimeter tests.Keywords:carbon nanotubes;polymer-matrix nanocomposites;mechanical properties;flame retardancy
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Kaiming Yang,Yiwei Gong,Guanlan Wu,Jiawen Zhang,Weici Quan,Yuxi Wu,Yadi Ai,Di Huang,Kai Yang,Hongguang Cheng,Qingrui Zhang,How Yong Ng
Liquid crystal monomers (LCMs), which are the key material of liquid crystal displays, have been recently considered as potential persistent, bioaccumulative, and toxic (PBT) chemicals. However, there is limited information on the accumulation and metabolism of LCMs in humans. In this study, a total of 162 paired serum and urine samples of a general population (aged 19 - 70 years) residing in Northwest China were collected and analyzed for the concentrations of 15 representative LCMs. The mean ∑15LCMs concentrations were 129.13 and 38.52 ng/mL in the serum and urine, respectively. BEEB was found to be the most P&B LCM and dominated both serum and urine. DFPrB accumulated remarkably in the serum, while PBIPHCN and BEEB were more easily eliminated by the kidneys. The strong correlations of some LCMs in the paired serum and urine suggest that urinary LCM concentrations can reflect their metabolic levels in the body. The estimated daily intake of ∑15LCMs for the study participants based on the serum data was 3.41 ng/kg body weight/day, and the hazard index of ∑15LCMs was 5.23×10 -5 which is acceptable (< 1). This study provides the evidence for the presence of LCMs in the serum and urine of general population and highlights the renal clearance of LCMs in the human body.
研究领域:
环境健康
·
毒理学
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环境科学
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人体暴露评估
·
分析化学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）