POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 8
·2843-2855
·
IF 3.665
Pengfei Ji,Yihua Cui,Dongyue Liu,Tianlong Zhang,Jipeng Lv
A novel functionalized graphene oxide (F-GO) decorated with a double-phosphaphenanthrene structure was fabricated using a covalent modification method. The F-GO with Bi-DOPO groups then was introduced into the epoxy matrix as a highly effective flame retardant. The Flame retardant epoxy resins (FREP) containing F-GO exhibited superior fire-resistant performance with extremely low loading. When the content of F-GO was 1 wt%, the limiting oxygen index value of the FREP was increased from 19.9% to 30.8%, and the total heat release and the peak heat release rate was decreased by 44.0% and 55.5%, respectively. Meanwhile, the tensile and impact tests results indicated that the mechanical properties of the epoxy resins were improved with the addition of F-GO. Furthermore, the thermogravimetric analysis showed that F-GO greatly increased the char-yield of the cured FREP. Based on the char analyses of SEM images, F-GO was conducive to form a more protective char barrier for FREP during combustion. F-GO developed a synergistic flame-retardant effect of the Bi-DOPO derivative and graphene layer structures on epoxy resins.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yuyang Zhou,Yichao Lin,Benjamin Tawiah,Jun Sun,Richard K.K. Yuen,Bin Fei
This study presents a novel and facile strategy for fabricating fire-resistant, ultraviolet (UV)-shielding, and tensile-enhanced polylactide (PLA) composites using two-dimensional (2D) MXene (Ti3C2) flakes chemically modified with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The thermal and burning performances of PLA composites were demonstrated by the limiting oxygen index, UL-94 test, and cone calorimetry. The UV-shielding and tensile performances were also examined. The results revealed that PLA/Ti3C2–DOPO (3 wt %) displayed a V-0 rating in the UL-94 test. The enhancement against fire hazard was reflected by the significant reduction in the peak heat release rate (33.7%), total heat release (47%), peak CO production (58.8%), and total smoke production (41.7%). The improved fire-safety performance of the composites is attributed to the interplay of catalytic, barrier, and condensed effects of the Ti3C2–DOPO nanosheets in the PLA matrix. PLA/Ti3C2–DOPO also showed an increase (∼9%) in tensile strength and an “Excellent” level (UPF 50+) in the UV-protection assessment. In all, this study introduces a novel chemical modification strategy for 2D MXene flakes to fabricate multifunctional PLA composites, which are promising candidates for next-generation sustainable and protective plastic products.
研究领域:
材料科学
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高分子化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Chenyu Zhou,Xinyu Wang,Junjie Wang,Zhiquan Pan,Hong Zhou
Improving the flame-retardant efficiency while maintaining the good properties of epoxy resin has become increasing important for industry applications. In this work, a fast char-forming flame retardant (nitro-containing chitosan-derivate, named CSN) derived from a one-pot reaction between chitosan and p-nitrobenzaldehyde was synthesized. When the total addition amount of CSN and 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) in epoxy resin (EP) is only 5wt%, the cured EP passed the UL-94 V-0 rating and the limit oxygen index (LOI) reached to 34.0%. The total heat release (THR) and total smoke production (TSP) of the modified EP decreased by 23.5% and 77.2%, correspondingly, and the char-forming ability was significantly improved when compared with pure EP. Meanwhile, the CSN and DOPO modified EP maintained comparable tensile strength, flexural strength and transparency with pure EP, which is closely related to the abundant hydroxyl and amine groups as well as rigid structure in CSN and DOPO. Considering that the facile preparation method and small addition amount of the flame retardant, the present work provides a convenient solution for the preparation of modified epoxy resins with good flame retardancy, heat stability, transparency and comparable mechanical properties with pure EP, which is expected to be widely used in industries.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Zeqi Zhang,Jie Zhang,Yaxuan Huang,Hailian Zhou,Rongjie Yang,Wenchao Zhang
Vinyl ester resin (VER) and its glass fiber composites are widely utilized in various industries due to the excellent overall properties. However, flame retardancy remains a key factor limiting the broader application of VER. In this study, we synthesized a new intrinsically flame-retardant vinyl ester resin monomer OPBMA-DOPO, through the reaction of Schiff base and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), and compared its properties with the commercial VER resin. The cured sample (OPBMAR-DOPO) and its glass fiber composite (OPBMAR-DOPO/GF) exhibit excellent flame retardant properties. Compared to VER, OPBMAR-DOPO exhibits a 51.18 % reduction in total heat release (THR) and a 40.55 % decrease in total smoke production (TSP). When compared to VER/GF, OPBMAR-DOPO/GF shows a 9.76 % decrease in THR and a 28.7 % reduction in TSP. The limited oxygen index (LOI) of OPBMAR-DOPO is 29.2 %, and for OPBMAR-DOPO/GF is 48.2 %, which are significantly higher than that of VER and VER/GF. Additionally, the mechanical properties of OPBMAR-DOPO and its glass fiber composite are superior to VER. Furthermore, the flame retardant mechanism of OPBMAR-DOPO was investigated. This study contributes to expanding the application areas of vinyl ester resin.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Peng Wei,Jiaojiao Li,Jinfei Yan,Junhui Li,Jichao Zhang,Yuchen Liu,Wanwan Li,Yumin Xia,Yanping Wang
In order to acquire polymeric fibers have both excellent flame retardance and mechanical properties, high molecular weight phosphorus-containing liquid crystal copolyesters derived from 6-hydroxy-2-naphthenic acid (HNA), terephthalic acid (TA) and 10-(2,5-dihydroxypheny)-10-hydro-9-oxa-10-phospha phenanthrene-10-oxide (DOPO-HQ) were synthesized via “one-pot” melt polymerization, and then the fibers were obtained by melt spinning method. The structure and property of the copolyesters were studied elaborately by experimental characterization technique and molecular simulation method. Shear shinning behavior was observed from rheology measurement, indicating that the copolyesters had excellent melt fluidity and spinnability. The rigidity of molecular chain was efficiently improved by the phosphorus-containing monomer DOPO-HQ and naphthalene HNA units which could be reflected by the molecular simulation results as well as high T g values. The flame retardant mechanism of the phosphorus-containing flame retardant copolyester was systematically studied via limiting oxygen index (LOI), vertical burning (UL-94) test, cone calorimetry, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the copolyesters exhibit synergistic flame retardant mechanism of gas phase and condensed phase. Meanwhile, mechanical property of the as-spun fibers could be significantly improved by increasing the spinneret draw ratio (SDR) attributed to high molecular chain orientation. The maximum tensile strength of the as-spun fiber was 0.77 GPa observed for P-HNA60P20 at a relatively low SDR of 29. It was shown the unique combination of good thermal stability, spinnability as well as mechanical and flame retardant properties of the copolyesters would make them could be used as high-performance flame retardant materials.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Tianchen Zhang,Yijiao Xue,Fei Song,Zheng Pan,Meng Zhang,Yonghong Zhou
As we all know, in the field of safety protection, it is crucial to develop protective materials with fire-retardant and vibration-damping properties. However, it is a challenging task to integrate different properties into a single polymer. To meet this challenge, we successfully developed a functionalized nano flame retardant (UiO-66-NH 2 @DOPO) by modifying UiO-66-NH 2 with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). This flame retardant was then incorporated into a porous polyurethane foam (MPUF) synthesized from a bio-based polyol, resulting in a bio-based MPUF composite with excellent vibration-damping, fire-retardant, smoke-suppressing, and anti-dripping properties. Due to the intumescent fire-retardant system formed by UiO-66-NH 2 and DOPO, when the additional amount of UiO-66-NH 2 @DOPO reached 25 %, the LOI value of the MPUF composite material was increased to 31.2 %, and the total smoke production (TSP) was reduced by 80.64 %. In addition, it obtained a V-0 rating in the UL94 test and exhibited excellent anti-dripping properties. In addition, owing to the reinforcement effect and stress dissipation of UiO-66-NH 2 @DOPO, the MPUF composites exhibited excellent energy dissipation and vibration-damping properties (maximum loss factor of 1.32 at 1.0 Hz). This new bio-based MPUF composite material has broad application prospects. It can become an innovative self-supporting vibration-damping and protective material in sports, transportation, and aerospace.
研究领域:
材料科学
·
安全工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2015
·
IF 3.163
Meng Zhang,Zhenyang Luo,Jinwen Zhang,Shuigen Chen,Yonghong Zhou
A novel phosphorus-nitrogen flame retardant (DOPO-BA) was synthesized from the condensation reaction of benzaldehyde , aniline and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The structure of DOPO-BA was characterized by Fourier transform infrared spectrometry (FTIR), 1 H NMR, 31 P NMR, elemental analysis and thermogravimetric analysis (TGA). DOPO-BA was used as a flame retardant in the preparation of rosin-based rigid polyurethane foams (RPUFs). The effects of DOPO-BA addition on the mechanical, thermal, and flame-retardant properties of RPUF were investigated. The morphology of DOPO-BA filled RPUFs was characterized by scanning electron microscope (SEM). The results show that DOPO-BA rendered RPUF good physical, thermal stability and flame-retardant properties. Limiting oxygen index (LOI) value of RPUF containing 20 wt% DOPO-BA increased to 28.1% from 20.1% of the RPUF without DOPO-BA.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Lifan Li,Xin Tang,Sha Zhou,Zaixing Zhang,Lingxiao Jing,Kun Luan,Zhaolong Su,Junjuan Huang,Tonghua Zhang
Cotton fabric is a cellulose-based material with complex capillary spaces, which enhance breathability and softness. However, these capillary spaces can promote bacterial growth with moisture during storage and daily use. Additionally, cotton fibers are highly flammable, posing a fire hazard to wearer. The lack of inherent antibacterial and flame retardant properties in cotton fabric limits its applications. In this paper, the triazole compound containing Schiff base (NABTA) was synthesized from 3-bromopropene, p-hydroxybenzaldehyde and 3-amino-1,2,4-triazole, followed by an addition reaction between Schiff base activity and 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) to synthesize an antibacterial and flame retardant precursor (NABTA-DOPO). The structure of NABTA and NABTA-DOPO was characterized by FTIR and NMR. NABTA and NABTA-DOPO were applied to cotton fabrics to investigate and compare their antibacterial properties and thermal stability. The results showed that all the cotton fabrics treated with NABTA and NABTA-DOPO had favorable antibacterial effects. The introduction of DOPO had no significant effect on the antibacterial effect and mechanism of the fabrics. However, it otherwise improved the burning stability of treated cotton fabrics. The antibacterial activity of 10 g/L NABTA-DOPO treated cotton fabrics after chlorination against E. coli and S. aureus was over 99.99 %. The vertical burning test results showed that cotton fabrics treated with a concentration of 50 g/L NABTA-DOPO had improved flame retardant properties with a damaged length of 5.9 cm. In addition, the storage, washability, UV stability and antibacterial reproducibility experiments demonstrated the excellent durability and reproducibility of the N-halamine structure of chlorinated cotton fabrics. This study enhances cotton fabric by synthesizing and applying NABTA and NABTA-DOPO, resulting in improved multifunctionalities, including antibacterial properties, flame retardancy, UV resistance, and wettability.
研究领域:
材料科学
·
纺织工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Junyuan Zhu,Ling Zhang,Chunzhong Li
In response to growing demands for environmentally friendly flame-retardant materials, this study develops a novel waterborne polyurethane (WPU) by incorporating the reactive phosphaphenanthrene-based compound DOPO-HQ into the polymer backbone. The modified WPUs, denoted as P-WPUx, exhibit significantly enhanced flame retardancy without appreciably compromising mechanical performance. With only 3 wt % DOPO-HQ loading, P-WPU3 achieves an LOI of 35.35%, satisfies the UL-94 V-0 requirement, and retains mechanical robustness with 33.0 MPa tensile strength and 737.8% elongation. Comprehensive analyses confirm that DOPO-HQ operates via a dual-phase mechanism: scavenging free radicals within the gas phase while simultaneously facilitating carbonaceous layer development in the condensed phase. These findings underscore the potential of molecularly integrated phosphorus-containing modifiers in the design of high-performance, sustainable flame-retardant WPU materials.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Puxi Zheng,Zhoufeng Wang,Wenchi Zhang,Hui Xu
To address the limited solution processability and insufficient thermo-oxidative char stability of conventional polyarylates, a molecular structure regulation strategy was proposed in this work. A series of DOPO-HQ-containing copolyarylates were synthesized by incorporating 10 - (2,5 - dihydroxyphenyl) - 10H - 9- oxa-10-phosphaphenanthrene-10-oxide (DOPO-HQ) into the polyarylate backbone through solution copolycondensation. The chemical structures and copolymer compositions were confirmed by 1 H NMR, HSQC NMR, quantitative 1 H NMR, and FT-IR analyses, while GPC and XRD were used to characterize the molar-mass parameters and amorphous structures, respectively. Thermal analysis showed that DOBA-20, prepared with 20 mol% DOPO-HQ in the total bisphenol feed, exhibited a glass transition temperature of 194.9 °C and a char yield of 38.3% at 800 °C under nitrogen. More importantly, DOBA-20 retained a char yield of 32.7% at 800 °C under air atmosphere, far exceeding that of the DOPO-HQ-free polyarylate, DOBA-0 (0.04%), indicating significantly enhanced char stability under oxidative conditions. TG-FTIR and Py-GC/MS analyses, together with XPS and SEM analyses of char residues, demonstrated that DOPO-HQ mainly promoted the retention of phosphorus species in the condensed phase, facilitating the formation of a continuous and compact phosphorus-rich char layer containing phosphate/pyrophosphate structures. This stable char layer could suppress heat transfer and oxygen diffusion, possibly accompanied by limited gas-phase inhibition. This work provides a molecular design strategy for regulating the thermal degradation pathway of polyarylates and improving their solution processability and thermo-oxidative stability.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Zhaoqi Zhu,Yanjun Chen,Min Li,Jia Zhang,Xiaoyin Cao,Hanxue Sun,Jiyan Li,Weidong Liang,An Li
Materials with thermal insulation and flame retardant properties are highly sought after in construction industry. In this study, two hollow-structured conjugated microporous polymer spheres (HCMPs) were successfully synthesized via the template method by polymerizing 1,3,5-triethynylbenzene with 3-amino-2,6-dibromopyridine and 2-amino-3,5-dibromopyridine respectively. To enhance flame retardant properties, HCMPs were impregnated with ethanol-soluble 6 H-dibenzo (C, E) (1,2) phosphine oxide-6-oxide (DOPO) (named as HCMP-FR), which maintains a hollow structure, enabling it to serve as a heat insulator, as observed under transmission electron microscope (TEM). The two types of HCMP-FR with a thermal conductivity of 0.047 W m −1 K −1 and 0.051 W m −1 K −1 respectively, exhibit excellent thermal insulation property. HCMP-FRs were added in to epoxy resin (EP) composites to further investigate the property of it. Under addition of 1.3%wt HCMP1-FR and HCMP2-FR, the thermal conductivity of EP composites (0.159 W m −1 K −1 and 0.146 W m −1 K −1 ) decreased by 25.3% and 31.4% compared with pure EP composites respectively, and the density (0.651 g cm −3 and 0.8 g cm −3 ) decreased by 42.1% and 22.5%, significantly reducing EP's thermal conductivity and density. The cone calorimeter (CC) tests show that the pHRR of EP composites at 0.6%wt addition was 859.04 kW m −2 and 904.35 kW m −2 , respectively, which were 17.5% and 13.1% lower than that of pure EP, and the TSP decreased by 44.9% and 41.3% when 1.3% HCMP-FRs was added, which shows an excellent smoke depressing property. Therefore, the HCMP-FRs synthesized have highly promising for application in thermal insulation and flame retardancy of energy saving building.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Yefei Nan,Xinyi Wang,Wenzhen Wang,Xingang Jia,Li Xia,Keting He,Dake Zhang,Dingyuan Deng
This study tackles the poor flame retardancy of CO 2 -based poly(propylene carbonate) (PPC) by synthesizing a known biobased phosphorus-containing monomer, DOPO-ITA, and for the first time, incorporating it as a flame-retardant functional third monomer into the copolymerization of CO 2 and propylene oxide, yielding flame-retardant PPCD. Structural characterization confirmed the successful synthesis. PPCD exhibited outstanding flame retardancy, with a limiting oxygen index of 32.2%, a V-0 rating, and no melt dripping. SEM analysis provided insights into the flame-retardant mechanism. Thermal analysis showed a 51% increase in initial decomposition temperature and a 36% rise in glass transition temperature, indicating significantly improved thermal stability. Mechanically, tensile strength and Young's modulus increased by 143% and 420%, respectively. This work presents an efficient, eco-friendly strategy for enhancing the flame retardancy of CO 2 -based polycarbonates and highlights the promise of biobased phosphorus-containing flame retardants in sustainable materials. Graphical Schematic illustration of the synthesis, thermal stability, and their flame retardant mechanism of PPCD.
研究领域:
高分子化学
·
阻燃材料
·
可持续材料
·
绿色化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）