Article
Engineering, Multidisciplinary
Yanlin Liu, Binbo Wang, Songqi Ma, Tao Yu, Xiwei Xu, Qiong Li, Sheng Wang, Yingying Han, Zhen Yu, Jin Zhu
Summary: The study introduces fully bio-based catalyst-free epoxy vitrimers for Carbon Fiber Reinforced Composites (CFRCs), showing exceptional malleability and reprocessability through compression molding. The material also demonstrates outstanding degradability, allowing for multiple recoveries of carbon fibers without damage.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Yue Jiang, Shuai Wang, Weifu Dong, Tatsuo Kaneko, Mingqing Chen, Dongjian Shi
Summary: The authors developed a high-performance, degradable, and recyclable bio-based epoxy resin by reacting the lignin derivative vanillin with 4-amino cyclohexanol via Schiff base. This resin exhibited higher Young's modulus and tensile strength compared to bisphenol A epoxy. It also showed good degradation in an acidic environment and recoverability through heat treatment. Additionally, the resin could be used to prepare carbon fiber-reinforced composites, with the carbon fiber being completely recyclable. This study provides a pathway for the preparation of high-performance epoxy resin and the effective recycling of carbon fiber.
Article
Materials Science, Multidisciplinary
Eleonora Manarin, Federico Da Via, Benedetta Rigatelli, Stefano Turri, Gianmarco Griffini
Summary: In this work, bio-based epoxy vitrimers were developed by reacting DGEBA and FDCA at different molar ratios. The transesterification exchange reaction kinetics of the crosslinked systems were characterized and showed a dependence on temperature and molar composition. The composition with a FDCA/DGEBA molar ratio of 0.6 exhibited self-healing, thermoformability, and mechanical recycling properties. This study demonstrates the potential of bio-based epoxy vitrimers incorporating FDCA in future circular economy scenarios.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Eleonora Manarin, Federico Da Via, Benedetta Rigatelli, Stefano Turri, Gianmarco Griffini
Summary: In this study, a series of bio-based epoxy vitrimers were developed and their potential in self-healing, thermoformability, and mechanical recycling was demonstrated. This research provides an important example for future circular economy scenarios involving reversible, high-performance epoxy materials.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Environmental
Nuo Liang, Xin Liu, Jiarui Hu, Yu Wu, Mengjie Peng, Yunke Ma, Yu Jiang, Juan Cheng, Sufang Chen, Daohong Zhang
Summary: Sustainability and high-performance of lightweight epoxy resin/carbon fiber composites are challenges in aerospace and wind power applications. The key is designing epoxy resins from non-petroleum-based materials, recycling carbon fibers, and improving interfacial interaction. This study presents the synthesis of bio-based degradable hyperbranched epoxy resins and investigates their topological properties and their effects on the mechanical and interfacial performance of the composites, leading to the discovery of interfacial improvement and carbon fiber recycling mechanisms. This work offers a promising approach for sustainable high-performance epoxy resin/carbon fiber composites.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xiaohong Liu, Ending Zhang, Jiaming Liu, Jingjing Qin, Mengqin Wu, Chaolong Yang, Liyan Liang
Summary: Traditional epoxy thermosets are widely used but cannot be recycled easily. This paper introduces the development of self-healing and degradable epoxy polymers with dynamic imine bonds. The polymers show self-healing, reprocessability, and thermadapt shape memory properties, and can be degraded through hydrolysis. Moreover, carbon fiber-reinforced polymer composites prepared with these polymers can be completely degraded under weak acid conditions, enabling non-destructive recycling. This material has potential as a sustainable structural material.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Bailiang Xue, Rui Tang, Danwei Xue, Ying Guan, Yongchang Sun, Wei Zhao, Jiaojun Tan, Xinping Li
Summary: In this study, high mechanical strength and lignin replacement rate of lignin-based epoxy vitrimers were successfully synthesized. These vitrimers exhibit excellent properties such as self-healing, reprocessing, and shape memory, suggesting their potential as renewable alternatives to bisphenol A epoxy vitrimers.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Polymer Science
Pengbo Zhang, Jun Long, Kangle Xue, Hailong Liu, ZiDie Song, Ming Liu, Tongjie Yao, Li Liu
Summary: In this study, a bio-based eugenol epoxy was grafted onto the polymethylhydrosiloxane (PMHS-x) main chain to develop a novel environmentally friendly silicone/epoxy hybrid resin. The hybrid resin exhibited low dielectric constant (D-k) and hydrophobicity, and the polysiloxane degradation process allowed for the retrieval of fibers from the composites. Compared to commercial epoxy-based composites, the hybrid resin showed higher impact strength and lower D-k, providing a reliable material option for microelectronic devices.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Mao Chen, Shuyi Duan, Lin Zhou, Zhongtao Chen, Yinyu Zhang, Yeping Wu, Qing Zhu, Kuibao Zhang, Xiuli Zhao
Summary: In this study, recyclable polymer-bonded explosives (VBXs) were successfully prepared using thiol-cured disulfide-based epoxy vitrimers. The VBXs exhibited excellent solvent resistance and mechanical properties, and the high explosives (HMX) could be non-destructively recycled from the VBXs using neutral thiol solutions. This work provides a new insight for the green development of energetic composites, and the thiol-cured disulfide-based epoxy vitrimers have the potential for various demanding applications.
Article
Polymer Science
Liuyue Zhong, Yanxin Hao, Junheng Zhang, Fang Wei, Tingcheng Li, Menghe Miao, Daohong Zhang
Summary: This study synthesized a ferulic acid-based hyperbranched epoxy resin (FEHBP) to produce closed-loop recyclable and catalyst-free epoxy vitrimers with improved mechanical performance. The incorporation of FEHBP enhanced the tensile strength and toughness of the epoxy vitrimers through an in situ reinforcing and toughening mechanism. The hydroxyls of FEHBP catalyzed the dynamic transesterification and accelerated the reprocessing of epoxy vitrimers.
Article
Polymer Science
Pei-Xiu Tian, Yi-Dong Li, Yunxuan Weng, Zhi Hu, Jian-Bing Zeng
Summary: In this study, bio-based flame-retardant, reprocessable, and chemically recyclable epoxy thermosets were synthesized. These thermosets exhibited excellent mechanical performances, thermal and dimensional stabilities, and resistances to chemical/solvent corrosions. They also showed promising flame retardancy, making them a potential alternative to conventional epoxy thermosets.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Engineering, Environmental
K. Senthilkumar, Thitinun Ungtrakul, M. Chandrasekar, T. Senthil Muthu Kumar, N. Rajini, Suchart Siengchin, Harikrishnan Pulikkalparambil, Jyotishkumar Parameswaranpillai, Nadir Ayrilmis
Summary: The study investigated the effect of accelerated weathering conditions on sisal and hemp fiber bio-composites. Results showed that the weathered hybrid mats exhibited good impact resistance and had nearly equivalent impact strength compared to pure sisal and hemp-based composites.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Review
Materials Science, Multidisciplinary
Yang Yang, Yanshuang Xu, Yan Ji, Yen Wei
Summary: Epoxy vitrimers offer reprocessability, self-healing, welding, reshaping, and recycling properties to epoxy resins, providing hope for replacing traditional thermosets in a wide range of applications in aerospace materials, electronic devices, and consumer products of daily life.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Materials Science, Composites
Chun Yan, Jun Wei, Yingdan Zhu, Haibing Xu, Dong Liu, Gang Chen, Xiaoqing Liu, Jinyue Dai, Dongxi Lv
Summary: The recycling of carbon fiber reinforced bio-based degradable epoxy resin composites is important for resource saving, environment protection and sustainable development. Resin transfer molding (RTM) is a promising process for manufacturing these composites cost-effectively. In this study, CF composites were prepared using a biodegradable epoxy resin, DEPVD, and DDS as a curing agent. The mechanical properties and degradability of the composites were investigated.
POLYMER COMPOSITES
(2023)
Article
Environmental Sciences
Jia-Hui Chen, Jia-Hui Lu, Xiao-Lu Pu, Li Chen, Yu-Zhong Wang
Summary: In this study, we report a novel approach to prepare flame-retardant epoxy vitrimers with rapid recycling and multiple shape memory effects by introducing dynamic ester-linkages with catalytic transesterification activity into the crosslinking networks of epoxy resin (EP). The synthesized vitrimers exhibited high Tg, desirable thermal stability, excellent flame retardancy, and high malleability. The dynamic transesterification network also allowed the vitrimers to access multiple shape memory effect.
Article
Materials Science, Multidisciplinary
Qingqing Zhu, Liyan Liang, Xiangxiang Du, Fei Xiao, Yuyue Guo, Jun Shi, Kun Wu, Mangeng Lu
MACROMOLECULAR MATERIALS AND ENGINEERING
(2018)
Article
Engineering, Chemical
Maoping Lu, Yingchun Liu, Xiangxiang Du, Shiheng Zhang, Guokang Chen, Qian Zhang, Sa Yao, Liyan Liang, Mangeng Lu
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Engineering, Chemical
Zhuorong Hu, Shan Wang, Yingchun Liu, Zhencai Qu, Zhiyou Tan, Kun Wu, Jun Shi, Liyan Liang, Mangeng Lu
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Zhiqiang Feng, Xiaohong Liu, Wenchao Zhang, Juanjuan Zeng, Jiaming Liu, Bifang Chen, Jiaming Lin, Liqin Tan, Liyan Liang
Summary: This study investigates the preparation of liquid crystal epoxy resin and functionalized mesoporous silica to successfully fabricate composite materials with excellent dielectric properties and hydrophobicity. These composite materials have significant application value in the field of microelectronic devices and 5G communication.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Chemical
Zhiqiang Feng, Xiaohong Liu, Jiaming Liu, Xi Chen, Bifang Chen, Liyan Liang
Summary: A composite material was prepared by in-situ polymerization of liquid crystal epoxy (LCE4) and a surface-functionalized boron nitride filler (f-BN). The surface-functionalization improved the dispersion of f-BN in LCE4, leading to improved interfacial compatibility. The modified f-BN/LCE4 composites exhibited higher glass transition temperature, better thermal stability, and higher thermal conductivity compared to pure LCE4.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Engineering, Environmental
Xiaohong Liu, Ending Zhang, Jiaming Liu, Jingjing Qin, Mengqin Wu, Chaolong Yang, Liyan Liang
Summary: Traditional epoxy thermosets are widely used but cannot be recycled easily. This paper introduces the development of self-healing and degradable epoxy polymers with dynamic imine bonds. The polymers show self-healing, reprocessability, and thermadapt shape memory properties, and can be degraded through hydrolysis. Moreover, carbon fiber-reinforced polymer composites prepared with these polymers can be completely degraded under weak acid conditions, enabling non-destructive recycling. This material has potential as a sustainable structural material.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Dingsong Wang, Jingjing Qin, Jiaming Liu, Mengqin Wu, Lifu Fu, Xiaohong Liu, Min Shi, Liyan Liang, Yonglu Dong
Summary: In this study, a novel addition-type liquid silicone rubber (LSR)/red mud (RM) composite was synthesized. The modified RM showed enhanced mechanical properties and thermal stability to LSR. The addition of modified RM significantly increased the tensile strength and Young's modulus of LSR, while retaining its mechanical properties after thermal aging.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Jiaming Liu, Xiaohong Liu, Xiaohua Cui, Jingjing Qin, Mengqin Wu, Lifu Fu, Min Shi, Dingsong Wang, Liyan Liang
Summary: Using biomass resources to prepare thermosets is a growing trend in sustainable society, and resveratrol-derived epoxy thermosets with active ester hardeners show promise in the electronic packaging field. The study synthesized resveratrol-derived epoxy and two active ester hardeners, and prepared bio-based epoxy thermosets. It was found that the REP/TAR thermosets exhibited better properties than REP/TTR thermosets in terms of gel fraction, solvent resistance, glass transition temperature, and thermal stability.
