Article
Materials Science, Multidisciplinary
Kangpei Qin, Xin Zhang, Yuan Xu, Yongyan Pang, Zhijun Wang, Yinfeng Liu, Wenge Zheng
Summary: This study aims to prepare a macromolecular flame retardant, EPB-DOPO, with good flexibility through a creative two-step reaction approach. EPB-DOPO exhibited good thermal stability, passed UL-94 flame ratings, and had a glass transition temperature below -20 degrees C.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Applied
Xinhao Cen, Zhilin Cao, Zhengzhou Wang
Summary: In this research, a novel multifunctional flame retardant (DSF) was prepared and applied in EPCE composites, and its mechanical performance, dielectric properties, thermal behavior, and flame retardancy were comprehensively investigated. The EPCE/8DSF composite exhibited excellent flame retardancy, thermal stability, and improved dielectric properties at 10 MHz.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yin Lu, Jiamei Liu, Wenqian Zhao, Kan Zhang
Summary: In response to the frequent fire accidents and sustainable development concerns, there is a need to produce more durable and safer flame retardant polymeric materials from natural renewable resources. This study successfully developed a molecular design strategy by incorporating oxazine ring substituents into bio-benzoxazine monomers, resulting in highly thermally stable and intrinsically flame retardant thermosets.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Xinxin Wang, Wentao He, Lijuan Long, Shaowen Huang, Shuhao Qin, Guomin Xu
Summary: The study successfully improved the flame resistance of PLA by incorporating a phosphorus and nitrogen-containing DOPO derivative (DOPO-NH2), achieving an LOI value of 26% with just 5% mass of DOPO-NH2 added. The hydrogen bonds formed between DOPO-NH2 and the PLA matrix maintained the mechanical properties of the composite.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(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
Shengda Wang, Shenghui Lou, Penghui Fan, Li Ma, Jie Liu, Tao Tang
Summary: In order to enhance the flame-retardant performance of epoxy thermosets while maintaining other properties, a new aromatic imine-containing DOPO-based bisphenol, DOPO-AI, was synthesized. When the mass of DOPO-AI was 25% of DGEBA, the resulting epoxy thermoset EP/20DOPO-AI exhibited excellent flame-retardant properties, showing V-0 rating with a limiting oxygen index of 35.4%. In addition, EP/20DOPO-AI also showed a reduction in heat release and an increase in char-forming ability.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Nanoscience & Nanotechnology
Yuyang Zhou, Yichao Lin, Benjamin Tawiah, Jun Sun, Richard K. K. Yuen, Bin Fei
Summary: This study introduces a novel chemical modification strategy to fabricate fire-resistant, UV-shielding, and tensile-enhanced PLA composites using chemically modified 2D MXene flakes. The composites showed excellent fire-safety performance with significant reduction in heat release and smoke production, as well as enhanced tensile strength and UV protection. The catalytic, barrier, and condensed effects of the Ti3C2-DOPO nanosheets in the PLA matrix contributed to the improved overall performance of the composites.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Hao Wang, Shan Li, Zongmin Zhu, Xianze Yin, Luoxin Wang, Yunxuan Weng, Xuyi Wang
Summary: A novel flame retardant POBDBI was synthesized and applied to epoxy resin, demonstrating significantly improved flame retardant performance and thermal stability of the composite materials. Fire behavior and characteristics of the char residue were also studied, showing the potential of POBDBI in enhancing flame retardancy.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Yan Zhang, Fenglong Lin, Yincai Wu, Shenglong Wang, Ziteng Liu, Lijun Song
Summary: In this study, cerium based DOPO derivative (Ce@DDP) was synthesized by hydrothermal method and its effects on flame retardancy, thermal stability, and mechanical properties of intumescent flame retardant polypropylene (PP) were investigated. The results showed that when adding 17 wt% of intumescent flame retardants (IFR) and 1 wt% of Ce@DDP, the peak heat release rate (PHRR) and peak smoke production rate (PSPR) of the resulting PP composite were reduced by 62.0% and 42.3%, respectively. Furthermore, Ce@DDP significantly improved the thermal stability and char formation ability of PP/IFR.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Yao Kun Chen, Qing Xin Lu, Gang Zhong, Hua Gui Zhang, Ming Feng Chen, Can Pei Liu
Summary: Phosphorus-containing flame retardant HBAEA-DOPO was synthesized and mixed with 4,4'-diaminodiphenyl sulfone to co-cure epoxy resin, reinforced with silane modified nano-SiO2, resulting in epoxy materials with excellent thermal stability and flame retardance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jiyeon Oh, Sam Soo Kim, Jaewoong Lee, Chankyu Kang
Summary: An eco-friendly flame-retardant process using supercritical CO2 was employed to enhance flame-retardant characteristics of PET fibers with DOPO. Increasing DOPO concentration led to improved phosphorous content without compromising physical properties. The treated fibers exhibited excellent flame-retardant performance and washing durability, making them a promising option for various applications.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Multidisciplinary
Jing Gao, Wentao He, Yushu Xiang, Lijuan Long, Shuhao Qin
Summary: The study demonstrated that DOPO-NH2 showed superior thermal, flame retardant, and mechanical performances to PA6 composites, mainly due to the existence of amino terminal group which improved the compatibility between the flame retardant and PA6 matrix.
FRONTIERS IN CHEMISTRY
(2022)
Article
Polymer Science
Dandan Chen, Benben Liu, Xu Wang, Xiangmei Li, Xingyan Xu, Jiyu He, Rongjie Yang
Summary: Benzoxazine resins with different content of 4,4'-(hexafluoroisopropylidene) diphthalic dianhydride (m-EFDA) were prepared to improve the thermal stability, flame retardancy and dielectric properties of the resin. The results showed that benzoxazine improved the processing window of m-EFDA and m-EFDA enhanced the thermal stability and dielectric properties of benzoxazine resins. The resin containing m-EFDA exhibited great performance improvement and could be potentially used as a high temperature and low dielectric material in the aerospace and microelectronics field.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Engineering, Multidisciplinary
Feng-Qi Zhang, Yuan-Zheng Zhao, Ying-Jun Xu, Yun Liu, Ping Zhu
Summary: By synthesizing a liquid 1-vinylimidazole salt containing DOPO (VIDOP), it can be used as a flame-retardant crosslinking agent. The modified resin and composite with added VIDOP showed improved flame retardancy and mechanical properties.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Composites
Xin Zhang, Jiazi Wu, Zhishuai Geng, Zhaolu Qin, Ye-Tang Pan, Wenchao Zhang, Rongjie Yang
Summary: A bio-based vinyl ester resin monomer was prepared and used to overcome the flammability and smoke release issues of vinyl ester resin. The impact of a diluent on the properties of the resin and its fiberglass-reinforced composites was investigated. The results showed that the bio-based resin and its composites had higher glass transition temperatures and improved mechanical properties compared to the conventional resin. Additionally, the bio-based resin exhibited superior flame retardancy and smoke suppression due to its better wettability on fiberglass.
COMPOSITES COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Dula Daksa Ejeta, Chih-Feng Wang, Ching-Hsuan Lin, Shiao-Wei Kuo, Jem-Kun Chen, Hsieh-Chih Tsai, Wei-Song Hung, Chien-Chieh Hu, Juin-Yih Lai
Summary: The study developed a cost-effective and environmentally friendly material PBZMS, which has superhydrophobicity and superoleophilicity for efficient removal of oil contamination from water. It has outstanding absorption capacities for various organic solvents and oils, excellent separation performance for emulsions, stability in harsh chemical environments, and recyclability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Kamani Sudhir K. Reddy, Wei-Jie Gao, Chien-Han Chen, Tzong-Yuan Juang, Mahdi M. Abu-Omar, Ching-Hsuan Lin
Summary: The research focuses on the degradability of two thermal-mechanically stable epoxy networks derived from self-curing of eugenol-based epoxy resins, as well as the recycling of carbon fibers in epoxy/carbon fiber composites. The study demonstrates the successful degradation and reapplication of thermal-mechanically stable epoxy networks, showing promise for industrial applications and environmental sustainability.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Polymer Science
Kalin G. Hanson, Ching-Hsuan Lin, Mahdi M. Abu-Omar
Summary: The study utilized isoeugenol obtained from lignin as a starting material to synthesize a series of novel biobased polyesters through polycondensation reaction, which possess tunable thermal properties and high bio-content.
Article
Polymer Science
Kalin G. Hanson, Ching-Hsuan Lin, Mahdi M. Abu-Omar
Summary: A series of renewable polyesters were crosslinked with epoxides to improve thermal and mechanical properties, expanding the applications of thermoset materials, especially bio-based renewable thermosets.
Article
Chemistry, Applied
Yan-Lin Wang, I-Hsiang Tseng, Ching-Hsuan Lin, Chun-Hua Chen, Tsung-Ta Hsieh, Mei-Hui Tsai
Summary: By coupling phosphinated polyimide with amino-functionalized polydimethylsiloxane, the adhesion properties of the resulting hybrid films were enhanced while maintaining sufficient mechanical strength and optical transparency. The XPS depth profile confirmed the presence of specific functional groups on the surface, increasing surface roughness and peel strength of the hybrid films with higher a-PDMS content. The low dielectric p-PI-Si-8% film exhibited improved peel strength and balanced melt-flow condition, making it a potential candidate for FCCL processing.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Engineering, Chemical
Dula Daksa Ejeta, Fu-Hong Tan, Ariraman Mathivathanan, Tzong-Yuan Juang, Mahdi M. Abu-Omar, Chih-Feng Wang, Ching-Hsuan Lin, Juin-Yih Lai
Summary: By synthesizing furan-based polybenzoxazine (Fu-PBZ) and using a non-solvent-induced phase inversion method, durable superhydrophobic surfaces were prepared on cotton fabric and filter paper. The modified materials exhibited superhydrophobicity and superoleophilicity, and showed excellent separation performance for oil/water mixtures.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ting-Wei Jiang, Kamani Sudhir K. Reddy, Yi-Chun Chen, Meng-Wei Wang, Hou-Chien Chang, Mehdi M. Abu-Omar, Ching-Hsuan Lin
Summary: In this study, two phenylacetate end-capping oligoesters were prepared from recycled bisphenol A obtained from waste polycarbonate. These oligoesters were used as epoxy-curing agents with successful results. The mechanical and thermal properties of the cured thermosets were investigated, showing promising glass transition temperatures, coefficient of thermal expansions, thermal decomposition temperatures, and tensile strengths. Additionally, carbon fiber composites were successfully prepared and could be effectively degraded with a catalyst-free aminolysis technique, allowing for the recycling of undamaged carbon fibers without losing their strength or composition.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Ren-Yu Yeh, Kamani Sudhir K. Reddy, Yi-Chun Chen, Meng-Wei Wang, Hou-Chien Chang, Mahdi M. Abu-Omar, Ching Hsuan Lin
Summary: A 100% atom-efficient strategy for preparing waste polycarbonate-derived epoxy resin was reported, demonstrating the preparation process with a model reaction and the production of three different WPC-based epoxy resins. The study also included the curing process, mechanical and thermal properties discussion, as well as the successful degradation of the epoxy resin and recycling of carbon fibers in the composite, contributing greatly to sustainable waste utilization techniques.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Pei-Hsuan Chang, Manik Chandra Sil, Kamani Sudhir K. Reddy, Ching-Hsuan Lin, Chih-Ming Chen
Summary: By synthesizing PI-COFs and doping them into the TiO2 photoelectrode of DSSC, the power conversion efficiency of the cell was improved, showcasing promise for enhancing solar efficiency in the development of DSSCs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Kamani Sudhir K. Reddy, Yi-Chun Chen, Yu-An Lin, You-Lin Shih, Meng-Wei Wang, Ching Hsuan Lin
Summary: An intrinsic flame-retardant moiety, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), is incorporated into oligo(2,6-dimethyl-1,4-phenylene ether) (OPE), and four phosphorus-containing telechelic OPE resins are synthesized. The synthesized resins exhibit excellent thermal, flexible, and flame-retardant properties. Especially, the self-cured OPE-OPM and OPE-OVBE show outstanding dielectric behavior.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yi-Chun Chen, Kamani Sudhir K. Reddy, Yu-An Lin, Meng-Wei Wang, Ching-Hsuan Lin
Summary: In high-frequency communication, signal propagation loss is proportional to frequency, dielectric constant, and dissipation factor. Therefore, it is crucial to have a polymer with low dielectric constant and dissipation factor for copper-clad laminates. A synthesized VT-OPE resin shows better properties than the commercial OPE-2St resin, including higher T-g, higher cross-linking density, lower coefficient of thermal expansion, better dielectric characteristic at 10 GHz, lower water absorption, and better flame retardancy. The laboratory process also proves the practicality of VT-OPE for copper-clad laminate.
Article
Materials Science, Multidisciplinary
Chang-Cheng Chang, Yu-Yu Chen, Hsiu-Mei Chiang, Yu-Fang Shen, Jian-Cheng Wang, Kang-Chiao Ma, Ching-Hsuan Lin, Tzong-Yuan Juang
Summary: A nonconventional fluorescent hyperbranched polymer was successfully synthesized in this study, displaying unique fluorescence properties. Through dynamic light scattering analysis, nanosized particles of pi-HBP 03 were observed in aqueous solution. Pi-HBP 03 exhibited effective antioxidant abilities in cells.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Ya-Chung Hsu, Manik Chandra Sil, Ching-Hsuan Lin, Chih-Ming Chen
Summary: Polyimide-based covalent-organic frameworks (COFs) with a highly ordered conjugated architecture were synthesized and hydrolyzed to offer a high density of negatively charged carboxylate anions for the adsorption of cationic methylene blue (MB) dye. The hydrolyzed COFs exhibited superior adsorption selectivity for MB and can serve as an efficient adsorbent in the posttreatment of dyeing processes.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Applied
Jittrakorn Udomsin, Ching-Hsuan Lin, Chih-Feng Wang, Jem-Kun Chen, Hsieh-Chih Tsai, Wei-Song Hung, Chien-Chieh Hu, Juin-Yih Lai
Summary: An eco-friendly method was reported to prepare multifunctional superwetting cotton-based materials for efficient separation of oily wastewater. The materials exhibited superhydrophilicity, underwater superoleophobicity, and underoil water sorption property, and showed excellent separation performance for surfactant-stabilized oil-in-water and water-in-oil emulsions.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Multidisciplinary
Kamani Sudhir K. Reddy, Yi-Chun Chen, Ru-Jong Jeng, Mahdi M. M. Abu-Omar, Ching-Hsuan Lin
Summary: In this study, waste polycarbonate (WPC) was efficiently upcycled to poly-(carbonate imine) vitrimers (PCIs) with unprecedented acid resistance to 5 M H2SO4. The upcycling of WPC is essential for sustainability, and the acid resistance of PCIs expands their application in acidic environments. This environmentally friendly work will attract the attention of researchers interested in sustainability and circularity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)