EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Xiaoqin Jiang,Meiling Chen,Jiyang Zuo,Tao Yang,Caiqi Liu,Kangpeng Liu,Siqi Yu,Fei Liu,Jinggang Wang,Jin Zhu
Bio-based materials provide solutions with both ecological benefits and technical feasibility for replacing traditional petroleum-based materials. This study focused on poly(propylene 2,5-furandicarboxylate) (PPF), a fully bio-based polyester with promising gas barrier properties. However, the lack of mechanical properties has become a key bottleneck in its packaging applications. Aiming at the problems of low molecular weight of PPF, Poly (propylene 2,5-thiophenedicarboxylate) (PPTh) oligomer prepared from 2,5-thiophenedicarboxylic acid and 1,3-propanediol was used to modify PPF, and high molecular weight poly(propylene 2,5-thiophenedicarboxylate-co-2,5-furandicarboxylate) (PPThF) copolyesters were prepared by melt polycondensation. The experimental results exhibited excellent CO 2 and O 2 barrier properties of up to 29.0 and 9.3 times compared with those of PET, respectively. Crucially, a brittle-ductile transition occurs without sacrificing barrier properties (elongation at break increases from 4.6% to 29%). These findings indicate that the material has the potential for packaging materials.
研究领域:
高分子材料
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包装材料
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生物基聚合物
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材料科学
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阻隔性能研究
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聚合物改性
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产品关联
DOI
高影响因子
CATALYSIS TODAY
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2018
·
IF 4.667
Hongge Cui,Xinli Tong,Linhao Yu,Ming Zhang,Yongtao Yan,Xuli Zhuang
An efficient tandem process for the oxidative condensation of furfural (FUR) with ethanol catalyzed by the copper/azodicarboxylate system has been developed. Firstly, the hydrogen transferring between FUR and ethanol is investigated under the nitrogen atmosphere by combining the azodicarboxylate and alkali carbonates, in which the main products are furfuryl alcohol and furan-2-acrolein. In the following, the cuprous halides and molecular oxygen are supplemented into the reaction system in order to improve the yield of furan-2-acrolein; therein, it is found that furfuryl alcohol is further oxidized and the selectivity of furan-2-acrolein is obviously elevated when CuI and o-phenanthroline (Phen) are used as the co-catalysts. Under optimal reaction conditions, 82.5% conversion of FUR with 87.7% selectivity of furan-2-acrolein is obtained with the assistance of diethyl azodicarboxylate (DEAD) and potassium carbonate. At last, a possible catalytic mechanism is proposed for the oxidative condensation reaction between FUR and ethanol in the presence of O 2 .
研究领域:
化学
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生物质转化
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产品关联
DOI
高影响因子
Green Processing and Synthesis
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2017
·Vol. 7
·期 4
·306-315
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IF 0.782
Zhihao Bi,Zhihao Li,Lifeng Yan
CuFeS 2 nanoparticles have been synthesized and used as catalyst for the degradation of lignin. Under mild condition of reaction at 60°C and 5 h in the presence of 2 ml hydrogen peroxide, lignin can be degraded completely and converted to dicarboxylic acids, such as oxalic acid (OA), fumaric acid, maleic acid, and succinic acid (SA), carbon oxides, and aromatic compounds. The major product is OA (up to 30% selectivity) and SA. On the basis of the chemicals detected, we proposed a logical mechanism similar to Fenton reaction. The results reveal that HO˙ and HOO − , formed from the cleavage of hydrogen peroxide over the catalyst, play an essential role in the oxidation of lignin to destroy its aromatic structure and generate carboxylic or DCA. This is a potential method to convert native lignin as a renewable feedstock to produce valuable chemicals.
研究领域:
化学工程
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可再生资源利用
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产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
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IF 3.78
Guoqiang Wang,Yin Liang,Min Jiang,Qiang Zhang,Rui Wang,Honghua Wang,Guangyuan Zhou
Six kinds of 2,5-thiophenedicarboxylic acid-based polyesters were synthesized using a two-step melt polycondensation method from 2,5-thiophenedicarboxylic acid (TFDCA) and aliphatic diols . For all polyesters synthesized, weight-average molecular weight was higher than 1.8 × 10 4 g mol −1 . For poly(hexylene 2,5-thiophenedicarboxylate) (PHTF), poly(octylene 2,5-thiophenedicarboxylate) (POTF), and poly(decylene 2,5-thiophenedicarboxylate) (PDTF), they were crystalline polymers due to long crystallizable polyethylene-like hydrocarbon segments in the backbone. However, for poly(2-methyl-1,3-trimethylene 2,5-thiophenedicarboxylate) (PMTF), poly(neopentyl glycol 2,5-thiophenedicarboxylate) (PNTF), and poly(pentylene 2,5-thiophenedicarboxylate) (PPeTF), the melting temperature was not observed. PMTF was a brittle material (elongation at break∼2%). However, other TFDCA-based polyesters were ductile materials (elongation at break>110%). For PNTF, the highest tensile strength (∼63 MPa) and moderate elongation at break (113%) were observed, which were comparable with that of polyethylene terephthalate (PET). The polyesters prepared could be very significant for the development of bio-based polyesters.
研究领域:
材料科学
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生物基材料
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产品关联
DOI
高影响因子
ACS Catalysis
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2024
·
IF 11.3
Ying Zhang,Junjun Mao,Bo Zhang,Dan Wang,Chenchen Zhang,Yang Lou,Chengsi Pan,Yongfa Zhu
Electrochemical carboxylation of 1,3-dienes with carbon dioxide (CO2) is a feasible method to obtain dicarboxylic derivatives, which are important synthetic intermediates of polymers and pharmaceuticals. However, due to unavoidable byproducts and unfriendly conditions, the formation of pure dicarboxylic acids has been limited. In this work, we report that a bimetallic phosphating CoFeP catalyst on nickel foam (CoFeP/NF) served as a remarkable electrode, which transforms CO2 into multicarbon (C6+) dicarboxylic acids. The synergistic effects of CoFeP catalyst between Co and Fe allow activation of 1,3-dienes mainly, in which electron transfer easier to the 1,3-dienes proceeded to afford radical anion of the diene, pursuant carboxylation with CO2 and further electron transfer formed the ultimate carboxylated products. The reaction can occur in a commercial flow cell with gram-scale amplification. The dicarboxylic acid obtained was up to 1.08 g at a 5 mmol scale of 1,3-dienes, illustrating high electrocatalytic activity and practical application of CoFeP/NF.
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xian Zhang,Shuai Jiang,Sipei Zhao,Rui Zan,Xiang Chen,Mengxuan Shu,Xiao Lu,Tao Suo,Jianming Guo,Zhong Xin
The chemical structure of polyester polyols significantly influences the properties of polyester-based polyurethane. This study involves synthesizing covalently cross-linked 3D network polyester polyols (poly(glycerol adipate) (PGA), poly(glycerol sebacate) (PGS), and poly(glycerol dodecanoate) (PGD)) from polycondensation of glycerol with bioderived aliphatic dicarboxylic acids (adipic acid, sebacic acid, and decanoic acid, with carbon chain lengths ranging from C4 to C10), followed by further polyurethane synthesis with dicyclohexylmethane diisocyanate. A systematic analysis was conducted to investigate the relationship between the carbon chain units of the biodicarboxylic acid and the physicochemical properties of the polyurethanes. The chemical structure, crystallization and melting behavior, thermal stability, mechanical properties, and biodegradability of the polyurethane were investigated by NMR, FT-IR, XRD, DSC, TGA, and mechanical test. The crystallization and melting point of the polyols gradually increased with increasing carbon chain length (C4–C10) units. The thermal stability, ultimate tensile strength, and elongation at break of the obtained PU polymer also gradually increased with the increasing carbon chain length units in the polyols. Besides, in vitro cell culture of adult mouse fibroblast L929 cells showed good support for cell viability. Furthermore, the investigation delves into potential medical applications of these polymers, such as the development of biodegradable antimicrobial coatings with norfloxacin and their potential use as temperature-responsive scaffolds. All polyurethanes exhibited body temperature (37 °C)-responsive behavior, and the shape recovery speed decreases gradually in the order of P(PGA)U, P(PGS)U, and P(PGD)U. This research contributes valuable support for the development of customizable medical materials with specific mechanical properties, degradation behavior, and stimulus-responsive characteristics.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
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2023
·
IF 1.5
Guo-Cheng Han,Jiating Hou,Zong-Li Huang,Xiao-Zhen Feng,Zhencheng Chen,Wenxiang Xiao,Shuang Li
Heme is an active center of hemoglobin which is a porphyrin compound containing two free carboxyl groups that may exert intermolecular interaction with ferrocene dicarboxylate which can be studied by electrochemical methods. The CV experimental results from this current study showed that ferrocene dicarboxylate had a good pair of redox peaks in NaOH aqueous solution and organic solvents in a quasi-reversible electrode process. There was linear relationship between current and square root of the scan rate, belonging to diffusion-controlled redox processes. The signals from the potential and current had obvious shift after the reaction with heme, especially when the redox peaks disappeared from the organic solvents. Fc(COOH) 2 was activated to give compound Fc(OBt) 2 with saturated structure that did not show better redox peaks due to its worse solubility, hence it didn’t form hydrogen bonds with heme. DPV was used for heme assay, where the current was proportional to heme concentration in the range of 1.0-5.0 μM, with 0.7 nM detection limits.
研究领域:
生物化学
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分析化学
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Zhaozhao Yang,Pengyang Li,Guoqing Chen,Ruiyuan Zhang,Bo Wang,Miaomiao Zhao
In this study, water-soluble additives with excellent performance were designed, and their anticorrosive, tribological characteristics, and antibacterial properties were evaluated. Combined with molecular dynamics (MD), the interfacial behavior of additives on metal surfaces was investigated at the atomic scale. The results showed that the additive molecules could reduce the wear rate of ethylene glycol aqueous (EGaq) by 94.7 %, exhibiting excellent anticorrosive efficiency while also possessing certain antibacterial properties. MD results indicated that the additive could firmly adhere to the metal surface due to its higher electron transfer rate, and the interfacial interaction energy increased with the extension of the carbon chain. The coexistence of longer alkyl chains and frictionally active elements ensured the overall stability of the adsorption film.
研究领域:
材料科学
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表面化学
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计算模拟
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Yue Hu,Zhou Fang,Xinyi Wan,Xu Ma,Yuqi Wang,Mengyang Dong,Zhizhen Ye,Xinsheng Peng
Developing efficient water adsorbents for solar-driven atmospheric water harvesting (AWH) still remains a challenge due to the poor photothermal heating ability and slow sorption kinetics of most adsorbents. Postsynthetic ligand exchange (LE) provides an alternative strategy to prepare metal–organic framework (MOF) materials with varied structures and functions. In this work, multifunctional hollow MIL-101(Cr) with ferrocene dicarboxylic acid (Fc(COOH)2) ligand exchanged (HMF) nanospheres are prepared and utilized for efficient AWH. The resulted HMF nanospheres present great visible light absorption (>80%) and photothermal conversion ability (61.6%) due to the introduced Fc(COOH)2 ligand. The water adsorption and desorption rates of the HMF nanosorbent are 2.3 times and 4.5 times that of MIL-101(Cr). The fast water capture and solar-driven release kinetics of HMF nanosorbents indicate its great potential for actual water harvesting. The outdoor water collection experiment demonstrates that the areal water harvesting capacity of the HMF nanosorbent is 1720 g m–2 per cycle with packed thickness of 8 mm. HMF nanosorbents also demonstrate good antibacterial activity (91.4%), which is beneficial to the collection of healthy and safe water. This work provides a facile and practical method to design multifunctional MOFs from the molecular level by LE and to achieve solar-driven AWH and other fields.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Ning Hou,Xin Zhao,Ziyi Han,Xinxin Jiang,Yongping Fang,Yun Chen,Dapeng Li
The inability to demulsify oil-in-water emulsions via green and efficient processes is a challenging problem in many industrial processes. As a novel biodemulsifier, protein demulsifiers display excellent dispersibility and stability, but their demulsification mechanisms are not clear, which severely restricts their large-scale production and application. In this study, the demulsification mechanism of the high-efficiency protein biodemulsifier oxalate decarboxylase (Bacm OxdC), which is secreted by the Bacillus mojavensis XH1 strain, for an oil-in-water emulsion was analyzed. The results showed that Bacm OxdC was spontaneously adsorbed at the oil-water interface and turned its hydrophobic amino acids outward to increase its hydrophobicity and break the emulsified system. Furthermore, it effectively reduced the oil-water interfacial tension and interfacial film strength, thereby reducing the oil-water interfacial energy and finally enabling demulsification. To further improve the demulsification efficiency and reusability, Fe 3 O 4 @SiO 2 @OxdC-DDSA was prepared. This method provided a magnetic response for Bacm OxdC and enabled efficient demulsification. The demulsification rate of Fe 3 O 4 @SiO 2 @OxdC-DDSA reached 98.1% at 24 h, which was 30.7% higher than that of the original Bacm OxdC. After three cycles, the demulsification rate still reached 89.3%, proving it has excellent recyclability . This work is the first study on the demulsification mechanism of protein biodemulsifiers and provides useful insights into the demulsification mechanism of biodemulsifiers for oil-in-water emulsions. In addition, a promising high-efficiency modification technique for protein biodemulsifiers was proposed, which provided information for the development of biodemulsifiers for oil-water separation.
研究领域:
生物化学
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环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Xiaochen Han,Chongyang Guo,Yugao Wang,Gang Liu,Jun Shen
Furan-2,5-dicarboxylic acid (FDCA) is an important biomass-derived diacid, and it is the most promising substitute for terephthalic acid. The common method of FDCA usually involves 5-hydroxymethylfurfural oxidation. Edible fructose is often used as the feedstock of 5-hydroxymethylfurfural, and the oxidation step would generate undesirable impurities. Herein, FDCA was novelty synthesized by carboxylation of formate and 2-furoic acid (FA) derived from unedible-biomass. This route is potentially advantageous because it is simple to operate and does not require any additional additives. The reaction mechanism has been elucidated by density functional theory (DFT) calculations. In the carboxylation process, the C(sp 2 )-H bond of formate (HCOOM) undergoes cleavage, generating the carbon dioxide radical anion (CO 2 •− ). Subsequently, CO 2 •− attacks the C 5 of FA, forming the C C bond and ultimately yielding FDCA. The conversion of HCOOM to CO 2 •− is an effective way to achieve carboxylation reaction. The rate-determining step of the carboxylation reaction is the cleavage of the C(sp 2 )-H bond of HCOO − with activation barrier of 159.11 kJ⋅mol −1 . The investigation would provide a new strategy for the mechanism of carboxylation reactions, and hold the potential to establish pathways for FDCA production.
研究领域:
化学
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材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 3
·365
·
IF 4.329
Yi Li,Guoyong Huang,Cong Chen,Xue-Wei Wei,Xi Dong,Wei Zhao,Hai-Mu Ye
Big spherulite structure and high crystallinity are the two main drawbacks of poly(butylene succinate) (PBS) and hinder its application. In this work, a new type of copolyester poly(butylene succinate-co-butylene acetylenedicarboxylate) (PBSAD) is synthesized. With the incorporation of acetylenedicarboxylate (AD) units into PBS chains, the crystallization temperature and crystallinity are depressed by excluding AD units to the amorphous region. In contrast, the primary nucleation capability is significantly strengthened, without changing the crystal modification or crystallization kinetics, leading to the recovery of total crystallization rate of PBSAD under the same supercooling condition. The existence of specific interaction among AD units is found to be crucial. Although it is too weak to contribute to the melt memory effect at elevated temperature, the interaction continuously strengthens as the temperature falls down, and the heterogeneous aggregation of AD units keeps growing. When the aggregating process reaches a certain extent, it will induce the formation of a significant amount of crystal nuclei. The unveiled nucleation mechanism helps to design PBS copolymer with good performance.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）