REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Xinyi Gao,Zhiyong Li,Xinru Bai,Yuting Dong,Jingjing Meng
There are many concerns associated with high-valued applications of bisphenol A, especially for health and safety issues. Since its widespread use in epoxy resins, related functionalization upgrading has garnered a lot of attention. In particular, its high flammability poses a major risk to property and human safety. To reduce flammability, epoxy monomers, such as 2,2′-(((propane-2,2-diylbis(2-allyl-4,1-phenylene))bis (oxy))bis(methylene))bis(oxirane)(DBAQ) and 2,2′-(((propane-2, 2-diylbis(2, 6-diallyl-4, 1- phenylene))bis(oxy))bis(methylene))bis(oxirane)(DBAW) containing multiple allyls and epoxides have been fabricated and then cured using aromatic amines via a solvent-free process. Therein, structural modification was achieved via a concurrent ring-opening polymerization/olefin polymerization. All these networks displayed good mechanical properties and outstanding thermal stability. Most importantly, all thermosets exhibited excellent flame retardancy displaying a UL-94-V0 rating for combustion. Thus, a green protocol has been established for the generation of halogen- and phosphorus-free functional epoxy resins. It is believed that this approach may provide strong potential for sustainability in practical applications.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yuqi Liu,Li Yuan,Guozheng Liang,Aijuan Gu
Endowing intrinsic halogen-free and phosphorus-free flame retardant biobased benzoxazine resins (biobased content > 50 %) with ultrahigh thermal stability and high strength is still an important and challenging issue. Herein, starting from citraconic anhydride and para -aminophenol or ortho -aminophenol, two isomeric phenolic compounds containing citraconimide groups, p CI and o CI , were designed and synthesized, each of which then reacted with furfurylamine and paraformaldehyde to synthesize novel para -functionalized benzoxazine monomer ( p CI–fa ) or ortho -functionalized benzoxazine monomer ( o CI–fa ). Results show that p CI–fa and o CI–fa have excellent processability, represented by low melting point ( p CI–fa : 150.0 °C, o CI–fa : 127.7 °C) and low curing temperature ( p CI–fa : 217.6 °C, o CI–fa : 205.5 °C); moreover, interestingly, there is no Diels-Alder reaction between citraconimide and furan groups. The cured resin from p CI–fa or o CI–fa , coded as poly( p CI–fa) or poly( o CI–fa) , has outstanding thermal resistance, tensile properties and flame retardancy. Especially, poly( p CI-fa) has better integrated performance than poly( o CI–fa) , and the initial thermal decomposition temperature ( T di ) of poly( p CI-fa) is as high as 391 °C, obviously higher than the those of all halogen-free and phosphorus-free flame retardant biobased benzoxazine resins (the biobased content > 50 %) reported in SCI database by 3 August 2022. The mechanism behind the integrated performances was discussed.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
Environmental Science-Water Research & Technology
·
2019
·Vol. 5
·期 10
·1736-1747
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IF 4.195
Chuanchuan Cui,Shuguang Zhang
In order to control the formation of inorganic calcium scale and improve the environmental benefits of coal water slurry, a non-phosphorus-containing and multipurpose copolymer IA–AMPS–APEG was successfully prepared. The chemical structure, molecular weight and thermal stability of the copolymer were characterized by FTIR, GPC and TGA. FTIR confirmed that the structure of the copolymer was consistent with the expected structure. The results of GPC and TGA showed that the copolymer's number average molecular weight was 31 870, and it had excellent thermal stability. The scale inhibition performance of the copolymer was investigated to determine the optimal synthesis conditions: n(IA) : n(AMPS) : n(APEG) = 1 : 2 : 0.33, the dosage of initiator is 4% of the total mass of the monomers, and the reaction temperature and time were optimized to 80 °C and 4 hours, respectively. The maximum scale inhibition efficiencies against CaCO3 and CaSO4 scale deposits were 94.35% (24 mg L−1) and 85.69% (22 mg L−1). Morphologies and crystal structures of the scale deposits were studied with SEM, TEM and XRD techniques. The results demonstrated that the surface morphologies and crystal structures of the inorganic scale deposits were significantly destroyed by the copolymer. In addition, the prepared coal water slurry using IA–AMPS–APEG as a dispersing additive had a high concentration, low viscosity, and good fluidity and stability. In short, the novel and multifunctional copolymer in this work is considered to be an increasingly promising candidate not only as a scale inhibitor in cooling water and reverse osmosis systems but also as a dispersant used in the preparation of coal water slurry.
研究领域:
环境科学
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材料化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Yao Wang,Li Yuan,Guozheng Liang,Aijuan Gu
A novel type of intrinsic flame retardant thermosetting resin without halogen and phosphorus elements (BDS) was developed based on building crosslinked network with a new disulfide-containing aryl allyl ether compound (DS) and bismaleimide. The molar ratio of DS to bismaleimide has a significant effect on performances of BDS resins, the resin (BDS-0.86) of which the molar ratio of DS to bismaleimide is 0.86 shows the best integrated performances including outstanding flame retardancy, high flexural strength (128.2 ± 8.6 MPa) and the highest glass transition temperature (336 °C) among halogen-free and phosphorus-free flame retarding bismaleimide resins reported so far. The origin of superior integrated performances of BDS-0.86 was intensively discussed from molecular structures and curing mechanism.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
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2019
·Vol. 30
·期 9
·2340-2352
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IF 2.162
Yuhui Feng,Li Yuan,Guozheng Liang,Aijuan Gu
Establishing a phosphorus-free strategy to fabricate high-performance thermosetting resins owning outstanding thermal resistance, good flame retardancy, and smoke suppression is important for sustainable development. Herein, a unique phosphorus-free hybrid (BN@CeO 2 ) was synthesized through chemically grafting cerium oxide (CeO 2 ) on surface of exfoliated boron nitride (BN) nanosheet with the aids of γ-aminopropyltriethoxysilane and polydopamine coating, which was then embedded into bisphenol A cyanate ester (BCy) resin to fabricate new BN@CeO 2 /BCy composites with high thermal resistance. Compared with BCy resin, the BN@CeO 2 /BCy composite with 4 wt% BN@CeO 2 not only has delayed initial ignition time by 23 seconds but also severally shows 58.1%, 23.1%, and 44.4% lower smoke produce rate, total heat release, and peak heat release rate. The study on mechanism behind outstanding flame retardancy reveals that the improved heat resistance and flame retardancy of BN@CeO 2 /BCy composite are attributed to multiply effects induced by BN@CeO 2 and its interaction with BCy resin; specifically, these effects come from BN (physical barrier) and CeO 2 (free radical trapping effect and catalytic char layer formation) as well as those from the synergistic effect of BN and CeO 2 . These excellent comprehensive properties of BN@CeO 2 /BCy composites demonstrate that BN@CeO 2 is an environment-friendly and synergistic modifier for developing heat-resisting thermosetting resins with outstanding flame retardancy and smoke suppression.
研究领域:
材料科学
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高分子科学
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消防安全工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Na Li,Jie Zhu,Dongni Liu,Liu Liu,Chenggong Zhang,Dequn Wu
The flammability and bacterial susceptibility of cellulose have always posed significant safety hazards in its application. A multifunctional agent (SiCA) combining flame retardancy and antibacterial activity was developed using nano-hybridization in this study. The SiCA was centered around nano-SiO 2 , which was modified with a quaternary ammonium salt and a Schiff base. Through chemical grafting, SiCA was successfully immobilized on the cotton fabric surface. Flammability tests revealed that the limiting oxygen index (LOI) value of treated cotton fabric rose significantly from 18 % to 27.5 %. The modified fabric showed a 35.5 % reduction in peak heat release rate (pHRR) and achieved self-extinguishing behavior in UL-94 vertical flame tests. The antibacterial efficacy of modified fabric against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ) was also validated, with inhibition rates reaching 99.6 %. Furthermore, the biocompatibility of modified fabrics was evaluated using MTS assays and animal wound model. L929 fibroblast cell tests confirmed low toxicity of SiCA. The wound healing rate of 97.3 % was achieved after 14 days in animal model, indicating the function of promoting healing. The excellent flame retardancy, antibacterial, and biocompatibility of modified cotton fabric suggested it was an ideal candidate in military combat training uniforms, infant and toddler clothing, automotive interiors, public transportation, and medical settings.
研究领域:
材料科学
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纳米技术
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高分子科学
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生物医学工程
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消防安全工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 10
·7651-7664
·
IF 3.442
Tian Chenfeng,Yuan Li,Liang Guozheng,Gu Aijuan
High thermal conductivity and high flame retardancy become necessary properties of thermally resistant thermosetting resins for many cutting-edge fields. However, building a phosphorus-free sustainable strategy is still a challenge; besides, sometimes high thermal conductivity and flame retardancy could not be simultaneously achieved, while sometimes they promote to each other, and no report focuses on explicating their relationship and mechanism. Herein, new resins with high thermal conductivity and greatly improved flame retardancy are developed through building phosphorus-free cross-linked network with three-dimensional porous framework based on boron nitride (BN) skeleton (sBN) and bismaleimide resin (BD). With the same loading of BN, sBN/BD has much higher thermal conductivity than the composite based on BN powders (BN/BD). For composites with 12.53 wt% of fillers (sBN or BN powders), the thermal conductivity of 5sBN/BD reaches 1.53 Wm −1 K −1 , about 2.4 and 9.4 times of those of 5BN/BD and BD resin, respectively. The exploring relationship between flame retardancy and thermal conductivity shows that sBN/BD composites are somewhat easier to be ignited, and the flame propagation is faster, but under continuous heating, sBN/BD has much weaker burn strength and fewer smoke releasing compared with BN/BD. 5sBN/BD has about 51.9%, 47.5%, 42.5% and 54.8% lower peak heat release rate, total smoke release, specific extinction area and maximum smoke density than BD resin, respectively. The mechanism behind these interesting results is intensively discussed.
研究领域:
材料科学
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化学工程
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高分子科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2012
·
IF 2.59
Lei Ling,Yuming Zhou,Jingyi Huang,Qingzhao Yao,Guangqing Liu,Peixin Zhang,Wei Sun,Wendao Wu
In an attempt to control Ca 3 (PO 4 ) 2 , CaCO 3 , and CaSO 4 deposits in industrial recycling water systems, an acrylic acid (AA)-allyloxy poly(ethylene glycol) polyglycerol carboxylate (APEG-PG-COOH) copolymer was synthesized as a nonphosphorus inhibitor. The synthesized polymer was characterized by 1 H NMR. The performance of PAA/APEG-PG-COOH on inhibition of Ca 3 (PO 4 ) 2 , CaCO 3 and CaSO 4 precipitation was studied through static scale inhibition tests. It was shown that PAA/APEG-PG-COOH exhibited excellent ability to control inorganic minerals, with approximately 100% CaSO 4 inhibition and 99.89% Ca 3 (PO 4 ) 2 inhibition at levels of 3 and 6 mg/L PAA/APEG-PG-COOH, respectively. PAA/APEG-PG-COOH also displayed ability to prevent the formation of CaCO 3 scales. The effects on formation of Ca 3 (PO 4 ) 2 , CaCO 3 and CaSO 4 were investigated with combination of Scanning electronic microscopy (SEM), Transmission electron microscopy (TEM), and X-ray powder diffraction (XRD) analysis, respectively.
研究领域:
环境化学
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材料科学
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工业水处理
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高分子化学
·
腐蚀与防护
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矿物结垢控制
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Gaoyuan Li,Hongbo Zhao,Yuling Wang,Qingrui Liu,Wenbo Sun,Biyu Huang,Haopeng Zhang,Jirui Qu,Weijian Liu,Xilei Chen,Chuanmei Jiao
The development of adsorbent materials capable of withstanding harsh environmental conditions remains a significant challenge. In this study, a novel flexible polyurethane (FPU) sponge composite (PU@BTC-Abz@Si) was successfully fabricated with outstanding flame retardancy, mechanical robustness, and oil-water separation performance. This was achieved by constructing micro-nano structures on the surface of FPU sponge by in situ self-assembly of dendrimers with π-π stacking interactions, and subsequent grafting with polydimethylsiloxane (PDMS). Notably, the synthesis was accomplished without the incorporation of phosphorus or metal-based flame retardants. Instead, PU@BTC-Abz@Si utilizes a flame-retardant strategy based on π-π stacking, imparting fire safety while minimizing secondary environmental pollution. Compared with pristine FPU sponge, PU@BTC-Abz@Si demonstrated significant reductions in total heat release (THR), total smoke production (TSP), and total carbon monoxide production (TCOP) by 55.4%, 51.9%, and 64.9%, respectively. Furthermore, PU@BTC-Abz@Si exhibited enhanced mechanical stability and high oil-water selectivity. This work offers a sustainable and efficient approach to enhance the functional performance of FPU sponge, with promising implications for environmental protection and fire-safe engineering applications.
研究领域:
材料科学
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化学工程
·
环境保护
·
消防安全工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Yuan Zhang,Xinyu Zhang,Peng Wang,Yudie Liu,Mengting Wan,Kan Zhang
The fabrication of bio-based epoxy resins having better intrinsic flame retardancy and mechanical performances than petroleum-based epoxy thermosets is important for alleviation of energy and health concerns. In this study, bio-based monomer of diglycidyl ether of curcumin (DGEC) was successfully synthesized from a natural and renewable curcumin through a facile one-step process. The biocompatible epoxy resin obtained was then cured with 4,4′-diaminodiphenyl sulfone (DDS) and compared with petroleum-based diglycidyl ether of bisphenol A (DGEBA). The DGEC/DDS exhibited a higher glass-transition temperature (300 °C) than DGEBA/DDS (215 °C), indicating the outstanding heat resistance. The tensile strength of DGEC/DDS was 65.9 MPa, higher than that of DGEBA/DDS (56.1 MPa). Furthermore, DGEC/DDS showed excellent charring ability with char yield of 50.15% at 800 °C in N 2 , which was approximatively 3.5 times as much as that of the cured DGEBA/DDS (14.68%). Microscale combustion calorimeter (MCC) test demonstrated that the DGEC/DDS possessed lower heat release capacity (HRC, 130 J/gk), peak heat release rate (PHRR, 115.0 W/g) and total heat release (THR, 9.9 kJ/g), which were reduced by 80.2%, 74.8% and 59.4%, respectively, compared to those of DGEBA/DDS (658 J/gk, 457.3 W/g, 24.4 kJ/g). The DGEC/DDS passed the UL-94 test and attained the V-0 rating, revealing the good flame retardancy. This work provided an opportunity to prepare bio-based epoxy resins with better properties than DGEBA, which exhibited promising applications in high heat and flame retardancy fields.
研究领域:
材料科学
·
化学工程
·
可持续化学
✓ 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）