Article
Engineering, Multidisciplinary
Guofeng Ye, Siqi Huo, Cheng Wang, Qiu Shi, Lingfeng Yu, Zhitian Liu, Zhengping Fang, Hao Wang
Summary: The study presents a novel epoxy resin based on TP, which has a high oxygen index and fire rating, reduces smoke production, improves the mechanical properties and transparency of the epoxy resin.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Yuanbo Zhang, Rui Liu, Ruizhi Yu, Kaiming Yang, Liulong Guo, Hongxia Yan
Summary: This study reports a phosphorus-free hyperbranched polyborate (HBPB) as a multifunctional flame retardant additive for high transparent epoxy resins (EPs). The addition of HBPB significantly improves the fire resistance and durability of EPs, while maintaining their transparency and color.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Applied
Xiaoyang Wang, Qun Liu, Jingming Wang, Jia Liu, Shijie Long, Dun Wang
Summary: The addition of phosphorus-containing pyrazolyl derivative (DPAP) flame retardant significantly enhances the flame retardancy, toughness, and transparency of EP materials. The EP/DPAP composite achieves a UL-94 V-0 rating and high LOI value with reduced PHR and THR. Furthermore, the sample exhibits increased elongation at break and only a slight decrease in transmittance. The EP/DPAP composite demonstrates high toughness and transparency, making it suitable for a broader range of applications.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Engineering, Environmental
Yuling Xiao, Guangyong Jiang, Chao Ma, Xia Zhou, Chenyu Wang, Zhoumei Xu, Xiaowei Mu, Lei Song, Yuan Hu
Summary: By designing a new hierarchical MoSe2 nanotube structure and combining it with linear polyphosphazene, the LPP-MoSe2 hybrids demonstrate significant improvements in the flame retardancy and mechanical properties of EP, expanding the practical application of high-performance EP composites.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Polymer Science
Guoliang Hu, Xiaoqing Zhang, Minglu Bu, Caihong Lei
Summary: In this study, a new reactive flame retardant was successfully synthesized and applied to improve the strength and toughness of flame retardant epoxy resins. The introduced flame retardant not only accelerated the ring-opening reaction of epoxy resin but also improved the transparency, thermal resistance, and thermal stability of the composites. The rigid structure and microphase separation effect of the flame retardant were found to enhance the tensile strength and toughness of the composites, while achieving good flame retardancy and fire safety.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Materials Science, Composites
Jiali Huang, Wenwen Guo, Xin Wang, Haoxin Niu, Lei Song, Yuan Hu
Summary: By combining a renewable flame-retardant toughening agent and core-shell particles, a series of high-performance epoxy composites were prepared with enhanced mechanical properties and flame retardant effects. The composite containing CF-PO(OPh)(2) and SiO2@UiO-66 exhibited the most significant improvements in tensile strength, impact strength, and fire safety properties.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Yadong Wang, Li Ma, Jun Yuan, Xianze Yin, Hua Wang, Chunzu Cheng, Luoxin Wang, Zongmin Zhu, Yunxuan Weng
Summary: By modifying epoxy resin with synthesized flame-retardant POI, we successfully prepared a transparent composite material with flame retardancy, low smoke, enhanced toughness, and high glass transition temperature. The modified composite material achieved a high limiting oxygen index, reduced smoke production, and increased impact strength. Comprehensive analysis revealed that the improved flame retardance was due to the joint action of quenching of gaseous phosphorus free radicals and protection of condensed coke.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Engineering, Multidisciplinary
Hao Wang, Jun Yuan, Zongmin Zhu, Xianze Yin, Yunxuan Weng, Zhaojia Wang, Feihua Yang, Jiayu Zhan, Hua Wang, Luoxin Wang
Summary: This study successfully prepared EP/BDO composites with excellent comprehensive performance by synthesizing a reactive flame-retardant BDO, which showed significant improvements in flame retardance, mechanical properties, and transparency. The composites also exhibited heat and smoke suppression effects, in addition to enhanced tensile and bending strength compared with neat EP.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Environmental
Siqi Huo, Zhongxiao Zhou, Jiawei Jiang, Ting Sai, Shiya Ran, Zhengping Fang, Pingan Song, Hao Wang
Summary: By synthesizing a novel multifunctional high-efficiency boron-containing polyphosphonamide (PB), it is possible to enhance the mechanical properties, thermal stability, and transparency of EP while maintaining its flame retardancy, offering an integrated strategy to meet the increasingly rigorous industrial requirements.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Jiali Huang, Wenwen Guo, Xin Wang, Lei Song, Yuan Hu
Summary: The study demonstrated that utilizing a bio-based cyclophosphazene core for curing cardanol resulted in a thermosetting material with lower initial decomposition temperature but improved char formation, high elongation at break, intrinsic flame retardancy, and excellent comprehensive properties.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Engineering, Environmental
Chenchen Gao, Longhai Guo, Peichen Yuan, Yajing Qiao, An Xing, Xiaoyu Li
Summary: This study developed a multifunctional epoxy resin with excellent flame retardancy, high strength, high toughness, low dielectric loss, and strong fluorescence. The resin achieved a V-0 rating and low phosphorus loading through the flame retardant mechanism in gas and condensed phase. Additionally, the resin showed improved tensile strength, impact strength, and modulus with a flexible aliphatic spacer, as well as reduced dielectric constant and dielectric loss tangent. The fluorescence capability of the resin also demonstrated potential applications in the anti-counterfeiting field.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Siyuan He, Cheng Chi, Chaohua Peng, Birong Zeng, Yongming Chen, Zhongxi Miao, Hui Xu, Weiang Luo, Guorong Chen, Zhenping Fu, Lizong Dai
Summary: This study proposes a simple approach to endow epoxy resins (EPs) with excellent flame retardancy and high toughness by combining rigid-flexible groups, promoting groups, and polar phosphorus groups with a vanillin compound. The modified EPs achieve a limiting oxygen index (LOI) of 31.5% and reach V-0 grade in UL-94 vertical burning tests with only 0.22% phosphorus loading. The introduction of the P/N/Si-containing vanillin-based flame retardant (DPBSi) improves the mechanical properties of EPs, including toughness and strength, with significant increases in storage modulus and impact strength.
Article
Chemistry, Multidisciplinary
Gaobo Lou, Zhewen Ma, Jinfeng Dai, Zhicheng Bai, Shenyuan Fu, Siqi Huo, Lijun Qian, Pingan Song
Summary: The study presents a simple and green strategy for the fabrication of fully biobased flame retardants by surface-functionalizing microcrystalline cellulose with chitosan and sodium phytate via layer-by-layer assembly in water. The fully biobased flame retardants showed high efficiency and mechanical reinforcement functions when incorporated into epoxy resin composites, enhancing their fire retardancy while simultaneously strengthening and toughening the composite materials. This work provides a promising approach for the development of sustainable and multifunctional biobased flame retardants for polymers.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Environmental
Qingshan Yang, Jun Wang, Xi Chen, Shuang Yang, Siqi Huo, Qiufei Chen, Pengzong Guo, Xiao Wang, Fu Liu, Wei Chen, Pingan Song, Hao Wang
Summary: A novel phosphorus-containing tertiary amine hardener was synthesized and applied to fabricate high-performance epoxy resins. The addition of phosphorus reduced the reactivity of the tertiary amine, but the epoxy resins showed increased glass-transition temperature, char yield, and improved mechanical properties. Additionally, the hardener conferred excellent flame retardancy and smoke suppression to the epoxy resins.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Yadong Wang, Liyan Liu, Li Ma, Jun Yuan, Luoxin Wang, Hua Wang, Fei Xiao, Zongmin Zhu
Summary: In this study, a reactive bio-based flame retardant named VTP was synthesized and used as a multifunctional additive to develop EP composites with excellent performance. The addition of 5 wt% of VTP achieved UL-94 V-0 rating in EP/VTP-5% sample and improved the mechanical properties and transparency of EP/VTP composites.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Mingfeng Chen, Yuhui Liu, Jinhuo Lin, Canpei Liu
JOURNAL OF APPLIED POLYMER SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Zhinong Li, Mingfeng Chen, Shanshan Li, Xianmou Fan, Canpei Liu
MACROMOLECULAR MATERIALS AND ENGINEERING
(2019)
Article
Polymer Science
Shanshan Li, Mingfeng Chen, Liping Su, Xiuhuang Lin, Canpei Liu
POLYMERS FOR ADVANCED TECHNOLOGIES
(2020)
Article
Materials Science, Multidisciplinary
Mingfeng Chen, Xiuhuang Lin, Canpei Liu, Huagui Zhang
Summary: PTDOB, a hyperbranched flame retardant containing P/N/Si/B and rigid-flexible structure, was synthesized to prepare high-performance epoxy resin with improved fire-safety and mechanical properties. The optimal flame-retardant epoxy thermosets exhibited self-extinguishing behavior, decreased heat release rate and smoke production, while also showing superior mechanical properties with increased impact and flexural strength. The study demonstrated that the incorporation of PTDOB has a positive effect on both flame retardancy and mechanical properties simultaneously, making it a promising additive for high-performance epoxy resin.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Polymer Science
Huawei Qiao, Xiuhuang Lin, Wei Zhong, Jiashui Lan, Huagui Zhang, Mingfeng Chen
Summary: A novel EP thermoset, Al2O3-PTDOB/EP, was developed in this study by adding aluminum oxide to hyperbranched flame retardant modified epoxy resin system, exhibiting superior comprehensive performance including excellent flame retardancy, smoke-suppressing effects, and enhanced mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Huawei Qiao, Liping Su, Canpei Liu, Huagui Zhang, Mingfeng Chen
Summary: Researchers have proposed a facile strategy to synthesize an industrially scalable phosphorus-nitrogen flame retardant named FNU. FNU endows epoxy resins (EP) with excellent flame retardancy and smoke suppression properties, while also improving mechanical properties and transparency.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Chen Mingfeng, Qiao Huawei, Li Shanshan, Zhong Wei, Lan Jiashui, Liu Canpei, Zhang Huagui
Summary: A novel Si/N/P-containing flame retardant PMBZ was prepared to enhance the flame retardancy of epoxy resin, achieving improved flame retardancy, smoke suppression, and mechanical properties.
Article
Polymer Science
Jiaojiao Lv, Bing Chen, Botuo Zheng, Mingfeng Chen, Huawei Qiao, Shanshan Li, Huagui Zhang
Summary: A novel flame retardant poly(phosphorus-silicon-alkyne) (PPSA) was synthesized to modify epoxy resin (EP), enhancing its flame resistance capability and improving its physical and chemical properties. The introduction of PPSA significantly improved the thermal stability and mechanical properties of EP. Char residues from the combustion process showed that PPSA effectively protected EP from fire by forming a compact thermal stable layer containing silicon and phosphorus.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Wenhui Luo, Dingsi Li, Mingfeng Chen, Liping Su, Wei Zhong, Jiashui Lan, Botuo Zheng, Huagui Zhang
Summary: A novel flame retardant, polyaromatic ring phosphor-nitrogen imidazole derivative (PNB), was added to epoxy resin (EP) to develop epoxy resin thermosetting materials (PNB/EP) with improved fire safety and mechanical properties. PNB could catalyze the curing process, resulting in lower peak temperature and apparent activation energy. The PNB/EP composite exhibited excellent fire resistance, reduced heat release, and increased mechanical strength.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Engineering, Multidisciplinary
Mingfeng Chen, Wenhui Luo, Shufeng Lin, Botuo Zheng, Huagui Zhang
Summary: In this study, a novel closed-loop recyclable elastomer-like epoxy vitrimer (ETOD-SA) was fabricated by combining siloxanes and dynamic transesterification reaction. ETOD-SA exhibited high stretchability, low dielectric permittivity, reversible deformation, and rapid self-healing. The epoxy vitrimer material showed excellent shape memory and reprocessing properties. Furthermore, carbon fiber reinforced ETOD-SA composite (ETOD-SA-CF) displayed remarkable self-healing, shape memory, and degradable properties, with the potential for application in recyclable carbon fiber reinforced composites.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Polymer Science
Geng Lai, Shufeng Lin, Zhinong Li, Huagui Zhang, Mingfeng Chen
Summary: A novel flame retardant, DOPO-based aminoethylpiperazine (AEPO), was successfully synthesized by reacting N-aminoethylpiperazine (N-AEP) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The modified epoxy resin (EP-AEPO) formed a ladder-like cross-linked network with AEPO, which showed improved flame retardancy and mechanical properties. EP-10 (EP with 10 phr of AEPO) achieved UL-94 V-0 rating, a LOI value of 35.5%, and reduced PHRR and THR by 25.2% and 29.8%, respectively, due to the synergistic charring effect of phosphorus and nitrogen elements.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Environmental
Huawei Qiao, Mingfeng Chen, Bing Chen, Huagui Zhang, Botuo Zheng
Summary: This study systematically reveals the role of a hyperbranched polysiloxane (PBPS) with boron in the curing kinetics of epoxy resin. Boron efficiently reduces the induction time of curing and increases the reaction rate in the non-catalytic stage. The addition of PBPS also affects the activation energy of the viscous flow stage, resulting in excellent toughening effects. This study fills the knowledge gap regarding the mechanism and influence of hyperbranched polysiloxane in the curing of epoxy resin.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Bing Chen, Geng Lai, Zhangyou Liu, Wenhui Luo, Shufeng Lin, Huagui Zhang, Mingfeng Chen
Summary: In this study, curing agents based on nitrogen-silicone Schiff base (BOB) and silica-bridged epoxy resin (ETOD) were synthesized. The cured ETOD using BOB resulted in a multi-silicon-bridge epoxy vitrimer containing dynamic imine bonds (BOB/ETOD). BOB/ETOD showed outstanding flame retardancy, degradability, reprocessability, antimicrobial activity, and UV-blocking properties.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)