POLYMER
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2024
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IF 4.1
Yongxi Cui,Yifen Xu,Jing Song,Hongrui Liang,Hui Yan,Congyun Zhang,Zhi Wang
Benzoxazine is a newly developed thermoset resin that has attracted significant academic and industrial interest due to its excellent properties. However, improving its dielectric performance while maintaining high heat resistant is crucial for expanding its application in 5G electronics. In this study, we designed and synthesized a novel benzoxazine monomer, DFDA-PTB, using p - tert -butylphenol (PTB) as the phenol source and furfuryl diamine (DFDA), derived from furfuryl amine, as the amine source. Two additional benzoxazines with similar structures were also synthesized for comparison. The cured product, poly(DFDA-PTB), was then analyzed to explore the relationship between its structure and properties. The results indicate that the introduction of a furan ring structure enhances thermal stability and reduces the dielectric constant. Additionally, the inclusion of tert -butyl groups further lowers the dielectric constant and dielectric loss. Simulation methods were employed to study the mechanisms behind these improvements. Poly(DFDA-PTB) demonstrated superior dielectric properties, with a dielectric constant of 2.51 and a dielectric loss of 0.0018 at 10 GHz. It also exhibited excellent heat resistance, with a char yield of 45.4 % at 800 °C. These properties make poly(DFDA-PTB) a promising candidate for electronic packaging and communication applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2023
·
IF 8.9
Hongsheng Wang,Xiaoyu Shi,Yitong Xie,Shishuai Gao,Yan Dai,Chenhuan Lai,Daihui Zhang,Chunpeng Wang,Zhanhu Guo,Fuxiang Chu
Development of sustainable adhesives requires simultaneous realization of high strength and excellent ductility but remains challenging. Here, we prepare furan-ring-containing biomimetic multiphase polymers to afford fully sustainable, strong, and supertough adhesives, showing that the key factors of these adhesives are the asymmetric structure of the aromatic furan ring and its oxygenated nature. The adhesives exhibit several beneficial structural features: easy phase separation, dynamic hard phases capable of rupturing and re-forming to dissipate energy, strain-induced orientation and recrystallization, and multiple oxygen binding to substrates. All of these factors act in synergy to result in high adhesion strength (12.1 MPa), exceptional toughness (work of debonding >13,000 N m −1 ), excellent temperature adaptability, and impressive solvent resistance. Thus, the present work provides new perspectives on the design of strong, tough, and fully sustainable adhesives.
研究领域:
材料科学
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生物仿生学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
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IF 4.7
Sipei Zhao,Changlu Zhou,Zhong Xin
Bacterial invasions pose major challenges to various aspects of human production and daily life, continuous exploration of antibacterial agents and the design of effective antibacterial materials are urgently needed. Herein, based on the diverse biological activity of oxazine compounds, a biobased benzoxazine monomer (PY-f) was successfully synthesized using renewable furfurylamine and pyrogallol as raw materials. The PY-f monomer exhibits excellent antibacterial activity, the relationship between its structural changes during the ring-opening reaction and antibacterial properties was discussed in detail. The experimental results indicate that its antibacterial activity is weakened with the ring-opening ratio of the oxazine ring. It is speculated that the antibacterial mechanism of PY-f is the synergistic effect of the electron-withdrawing oxazine ring and furan ring. Moreover, incorporating PY-f into polyethylene (PE) to create antibacterial polymer materials reveals that the PE/PY-f composites exhibit outstanding antibacterial properties within the processing temperature range of 140–190 °C, along with long-term antibacterial potential. Notably, the evolution of the molecular structure of PY-f during thermal processing brings simultaneous improvements in toughness and modulus to modified PE, as well as interesting surface hydrophilic and hydrophobic conversion. This study validates the effective antibacterial properties of benzoxazines and provides a feasible strategy for the design and development of antibacterial polymers.
研究领域:
材料科学
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生物医学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Shenyu Wang,Junjie Zhang,Ying Zhang
Graphical The CoO@Co core-shell catalyst, 7Co-0.2Fe/CeO 2 , efficiently catalyzes the hydrogenation and ring-opening of furfural to 1,5-pentanediol, with a high productivity of 54.76 mmol/g Co /h, representing the top activity level among the reported catalysts. The addition of Fe optimizes the Co 2+ /Co 0 ratio, improves substrate adsorption, and prevents the formation of tetrahydrofurfuryl alcohol, a saturated furan byproduct. In the conversion of furfural using non-noble metal catalysts, preferential cleavage of the C2−O bond followed by hydrogenation of the C=C bond facilitates selective access to valuable 1,5-pentanediol (1,5-PeD). Herein, we developed CeO₂ loaded core-shell CoO@Co nanoparticle catalysts. Adjusting Co loading, Fe doping, and reduction temperature improved reaction efficiency. 7Co-0.2Fe/CeO₂ catalysts reduced at 500 °C demonstrated optimal performance. 1,5-PeD produced at 54.76 mmol/g Co /h, representing the top activity levels among the reported catalysts. H₂-TPR, XRD, HAADF-STEM, FT-IR, XPS, and XANES were employed to investigate the catalyst structure-activity relationship. Co 2+ cleaves furan ring C−O bond, Co⁰ promotes double-bond hydrogenation. The CoO@Co structure favors the desired 1,5-PeD production route. Trace Fe species optimize the Co 2+ /Co⁰ ratio, enhance the substrate adsorption, and inhibit the furan ring saturation. These findings emphasize the importance of fine-tuning catalyst structure and composition for selectivity improvement.
研究领域:
化学工程
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催化科学
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可再生资源转化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shun Chen,Fuwei Liang,Liping Jin,Chenpeng Ji,Nan Xu,Kun Qian,Wenwen Guo
With the increasing awareness of environmental protection, the demand for eco-friendly bio-derived flame-retardant for textiles has received increasing attention. In this work, a fully bio-derived phosphorylated furan-based flame retardant (FAP) was synthesized by the Schiff reaction of furan-based compounds (furfural and furfurylamine). To evaluate the application scope and flame retardant efficiency of FAP, cotton fabrics and PLA nonwovens were selected as biomass-based representatives of natural fiber materials and synthetic fiber materials, respectively. Significantly, based on the composition of furan ring, phosphorus and nitrogen containing components of FAP, excellent charring and flame retardant properties of coated cotton fabrics and PLA nonwovens can be expected. TGA results showed that the residual char of C-FAP-3 and P-FAP-3 were 39.7% (increased by 267.6%) and 16.7% (increased by 215.1%), respectively, higher than those of control cotton (10.8%) and PLA nonwoven (5.3%). Cone test results exhibited that the peak heat release rate (PHRR) and total heat release (THR) values of C-FAP-3 were sharply decreased by 69.4% and 37.8%, respectively. P-FAP-3 also displayed a significant reduction in PHRR, implying high flame retardancy of C-FAP-3 and P-FAP-3. Notably, through the weight gains of FAP coating on cotton and PLA as well as the final LOI and VBT results of the flame retardant treated fabrics, it can be preliminarily inferred that control cotton fabrics are more likely to achieve better flame retardant effects than PLA. Additionally, the facile synthetic strategy of fully bio-derived flame retardants is expected to promote the development of green flame retardant strategies for high-performance textiles.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Yaqi Qin,Xueting Mu,Xiaoyu Feng,Kai Xu,Jinkang Ma,Lifeng Cao,Bing Teng
Two novel chalcone crystals, FTB (C 13 H 9 BrO 2 , P 2 1 ) and FTC (C 13 H 9 ClO 2 , Pna 2 1 ), were successfully synthesized by introducing halogen substituents, and slow evaporation method was used for these two crystals growth. The molecular stacking and arrangement of these two crystals were analyzed by using single-crystal XRD technique. The SHG intensities of the FTB and FTC crystals were 14.4 and 12.6 times higher than the simultaneously measured KDP. Their cutoff wavelengths are 350 nm and 346 nm, respectively. FTC crystals show higher thermal decomposition temperature (T m ≈ 146 °C) and FTB crystals show higher optical energy gap (E g = 3.63 eV) than other reported chalcone crystals. All the results show that these two newly grown crystals are optically promising.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Ying Bi,Zuoyuan Zhang,Lu Zhang,Binhui Zhao,Shanshan Cong,Liwu Zu,Shaobo Dong,Tianyu Lan,Yazhen Wang
Benzoxazines are synthesized by combining amines or phenolic structures from renewable biomass to achieve high carbon yields and heat resistance, and they have attracted considerable attention as sustainable high-performance polymers. A bifunctional benzoxazine monomer (DES-fa) was synthesized from diethylstilbestrol and furfurylamine by a solution process and was cured and characterized. The structural composition of the DES-fa monomer was analyzed by NMR, Fourier infrared spectroscopy, and mass spectrometry. Curing kinetics were studied by differential scanning calorimetry (DSC) by employing the Kissinger, Ozawa, Starink, and Friedman methods. The apparent activation energy of DES-fa was calculated to be 110.81 kJ/mol using the Starink method. The predicted plots of the developed mathematical model aligned well with the experimentally obtained DSC thermogram results. A polymerizable group (oxazine, furan ring) was introduced into the benzoxazine molecule to reduce the curing polymerization temperature. Thermogravimetric analysis showed that the prepared benzoxazine resin exhibited excellent thermal stability, with a Td5 of 362 °C, a Td10 of 433 °C, a residual carbon content of 51%, and a Tg of 260 °C. Therefore, this new furfurylamine biobased benzoxazines offers a wide processing window and excellent thermal stability, which promise great potential for high-performance polymeric materials.
研究领域:
材料科学
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Tianjian Sun,Mingyu Liu,Shuai Li,Jiawei Guo,Lei Liu,Lixin Zhang,Li Ma,Shengying Li
Avermectins (AVMs) are a class of 16-membered ring macrolides produced by Streptomyces avermitilis. Renowned for their potent insecticidal and acaricidal properties, AVMs are widely used as environmentally friendly biopesticides. Although the biosynthetic gene aveE encoding a cytochrome P450 monooxygenase was identified 30 years ago, its exact catalytic function and mechanism have remained elusive due to a lack of biochemical characterization. Here, we overcome the long-standing challenge in soluble and functional protein expression of AveE in Escherichia coli and reconstitute the in vitro activity of this P450 enzyme using surrogate redox partner proteins. Time-course studies reveal monohydroxylation at the C8a position of the substrates as the initial step, subsequently leading to tetrahydrofuran (THF) ring formation. Isotopic labeling experiments provide significant insight into the catalytic mechanism of AveE, revealing the cooperation of the C8a,C6-diol pathway and the C6-nucleophilic attack pathway. This study not only presents an effective strategy for heterologous expression of difficult P450 enzymes in E. coli but also elucidates the exact process of THF ring formation during AVM biosynthesis.
研究领域:
微生物学
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酶学
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生物化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Xing Gao,Wenna Zhang,Yingying Ruan,Shihao Zhang,Sheng Wei,Yiwen Zhang,Pengfei Liu,Dong Tian,Yihu Dai,Yanhui Yang
The conversion of biomass-based compounds into highly value-added chemicals has received extensive attention in recent years. This work reports the liquid-phase selective hydrogenation and furan ring-rearrangement of furfural (FFL) into cyclopentanone (CPO) and cyclopentanol (CPL) over Pd/Co 4 Al 1 -HTs catalysts and water as the solvent. The specific reaction rate of the optimal catalyst at 160 °C reaches 538 h –1 , and the selectivity of CPO/CPL is 77.5 %. By adopting the ion-exchange and formamide treatment methods, the type of the interlayer anions and interlayer spacing for the CoAl-HTs supports can be regulated, which can affect the state of the supported Pd sites and their catalytic activity and selectivity towards the ring-rearrangement products. Furthermore, the H 2 /D 2 exchange experimental results demonstrate that the presence of the interlayer NO 3 – anions of CoAl-HTs support promotes the activation and dissociation of H 2 , thereby accelerating the hydrogenation of FFL to cyclic compounds.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Hao Lin,Wen Li,Qingpeng Ou,Jie Liu,Zhaoyang Wei,Zhao Wang,Dean Shi,Weiwei Lei,Liqun Zhang
Biomass feedstock is an accessible alternative to finite fossil chemical resources for fabricating durable and high-performance polymers. In this study, fully biobased poly(1,5-pentylene succinate-co-itaconate-co-furanoate) (PPeSIFs) copolyesters were synthesized by using transesterification and melt polycondensation methods from dimethyl furandicarboxylate, dimethyl succinate, dimethyl itaconate, and 1,5-pentanediol. Dimethyl itaconate was incorporated to provide the cross-linkable reaction sites. Four kinds of monomers were employed to regulate the glass transition temperature and suppress crystallization. Silica/PPeSIF nanocomposites exhibited good mechanical properties, such as an ultimate tensile strength of 17.2 MPa and an elongation at break of 253%. This elastomer displayed outstanding gas barrier properties comparable to those of butyl rubber, with an O2 permeability 13 times lower than that of natural rubber. Positron annihilation lifetime spectroscopy tests demonstrated that furan moieties significantly reduced the free volume of PPeSIFs. This work provides a promising route for preparing a biobased elastomer with intrinsic high gas barrier properties.
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
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Jiamin Zhong,Shihong Zhang,Yi He,Yi Fan,Zhiyuan Li,Liping Yan,Huilian Zhou,Xinyu Cheng,Jinxue Song,Hongjie Li
In this paper, graphene oxide (GO) and furan epoxide graphene (FGO) were synthesized using graphene (G) as raw materials, and added to Ni-W-P coating as nano-reinforced materials, and various composite materials were successfully prepared by electroless plating , and the effects of G, GO and FGO as nano-reinforced materials on the surface morphology , wear resistance, corrosion resistance and microhardness of Ni-W-P coatings were studied and discussed. The experimental results show that the surface morphology of Ni-W-P-FGO coating is the most complete and dense, without obvious surface defects . In the friction test, Ni-W-P-FGO composite coating has the narrowest wear section, the wear amount is 311.617 μm 2 /N (minimum) and the average friction coefficient is the smallest (0.203) and it shows the best corrosion resistance in the corrosion resistance test, with the lowest corrosion current density (i corr = 0.7095 μA/cm 2 ) and the largest corrosion resistance (Rt = 66,554 Ω·cm 2 ).
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Gang Yang,Bin Li,Kewei Chen,Muying Du,Zsolt Zalán,Ferenc Hegyi,Jianquan Kan
Identifying aflatoxin-detoxifying probiotics remains a significant challenge in mitigating the risks associated with aflatoxin contamination in crops. Biological detoxification is a popular technique that reduces mycotoxin hazards and garners consumer acceptance. Through multiple rounds of screening and validation tests, Geotrichum candidum XG1 demonstrated the ability to degrade aflatoxin B 1 (AFB 1 ) by 99–100%, exceeding the capabilities of mere adsorption mechanisms. Notably, the degradation efficiency was demonstrably influenced by the presence of copper and iron ions in the liquid medium, suggesting a potential role for proteases in the degradation process. Subsequent validation experiments with red pepper revealed an 83% reduction in AFB 1 levels following fermentation with G. candidum XG1. Furthermore, mass spectrometry analysis confirmed the disruption of the AFB 1 furan ring structure, leading to a subsequent reduction in its toxicity. Collectively, these findings establish G. candidum XG1 as a promising candidate for effective aflatoxin degradation, with potential applications within the food industry.
研究领域:
食品科学
·
微生物学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）