HIGH PERFORMANCE POLYMERS
·
2022
·
IF 1.73
Sarah Soudjrari,Mehdi Derradji,Bouchra Amri,Khawla Djaber,Oussama Mehelli,Sana Tazibet,Slimane Abdous,Noureddine Ramdani,Wenbin Liu,Azzedine Khadraoui
Benzoxazine containing phthalonitrile, as one of the most advanced high performance thermosetting resin, has gained a lot of attention in the last decades. Indeed, the combination of the thermally activated ring-opening polymerization of the benzoxazine and the cyano addition reaction of the phthalonitrile allows the development of robust polymeric networks. Following this path, a renewable natural resource, vanillin, was used to develop a new benzoxazine containing phthalonitrile thermosetting system. The newly developed monomers present the advantage of a simple synthesis process along with an autocatalytic polymerization mechanism. The molecular structures of the synthesized monomers were characterized by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy . Thermal properties were also characterized by differential scanning calorimetry and thermogravimetric analysis . Typically, the newly developed monomers showed excellent thermal stability with starting decomposition temperatures over 496.4°C with a char yield at 800°C of about 80.7%. The thermomechanical properties were investigated by dynamic mechanical analyzer and the fractured surfaces were studied by scanning electron microscopy Globally, the newly developed partially bio polymer showed outstanding thermal resistance along with excellent thermomechanical properties.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
ChemCatChem
·
2021
·Vol. 14
·期 6
·e202101539
·
IF 5.686
Siwei Zhao,Shaohua Jin,Huanmin Liu,Youxin Su,Wei Liu,Shengfu Li,Chongchong She,Haonan Li,Kun Chen
Graphical A series of all-inorganic lead-free halide perovskite inverse opals were prepared and furtherly used as the photocatalysts to promote the polymerization of EDOT under the irradiation of visible light. All the samples exhibited the nice replica of the artificial template and high crystallinity. The bandgap of the catalysts was adjusted by screening the ratios of bromide to iodide and antinomy to bismuth. Cs 3 Bi 0.5 Sb 1.5 Br 9 showed the highest performance of the photocatalytic polymerization for EDOT, indicating the dual halide perovskites are more flexible than single halide perovskite in terms of bandgap engineering. A series of all-inorganic lead-free halide perovskite inverse opals were prepared and furtherly used as the photocatalysts to promote the polymerization of 3, 4-ethylenedioxythiophene (EDOT) under the irradiation of visible light. All the samples exhibited the nice replica of the artificial template and high crystallinity. The bandgap of the catalysts was adjusted by screening the ratios of bromide to iodide and antinomy to bismuth, respectively. Among all the samples, Cs 3 Bi 0.5 Sb 1.5 Br 9 inverse opal showed the best catalytic performance and the excellent stability in terms of the morphology and the crystalline phase after four cycles of photocatalytic polymerization. Since EDOT is commercially available, the present observation suggested a convenient protocol of preparing the composited materials or optoelectronic devices based on the lead-free halide perovskites and the conductive poly(3, 4-ethylenedioxythiophene).
研究领域:
材料科学
·
光催化
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Feng Wang,Chao Li,Haohao Wang,Lu Yu,Fuming Zhang,Robert J. Linhardt
Natural amino acid polymers have been wide-used as bio-compatible emulsion stabilizers . In this study, Amphiphilic O(Phe- r -Glu)s were synthesized through the papain-catalyzed random polymerization of L -phenylalanine and L -glutamate with the major degree of polymerization value of 6–7. The polymerization yield was increased by more than 35 % using choline to reduce the energy barrier for the amino substrates to form the tetrahedral intermediate with the catalytic triad. The squalene/water emulsions stabilized by O(Phe- r -Glu) nanoparticles were pH-insensitive at pH 1–12. The investigation of mechanism found the combined effects of steric hindrance , electrostatic repulsion and the viscosity of the emulsion contributed to the stability of the emulsion droplets. Under acidic condition, the layers of O(Pho- r -Glu)s particle aggregates formed around the emulsion droplets and the higher viscosity of emulsion mainly contributed to the stability of emulsions . At basic condition, the strong electrostatic repulsion between emulsion droplets covered by the negatively charged O(Pho- r -Glu) particles and the steric hindrance contributed mainly to the prevention of the coalescence of emulsion droplets. The application of enzymatically synthesized amphiphilic peptides in emulsion, along with tunable performance through the polymerization of amino substrates, is in line with the sustainable development requirements in fields such as pharmaceuticals, food and cosmetics.
研究领域:
生物材料学
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食品科学
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制药工程
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DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-17
·
IF 36.3
Wang Hao,Ding Jiheng,Zhao Hongran,Chu Qinchao,Zhu Jin,Wang Jinggang
Renewable 2,5-furandicarboxylic acid-based polyesters are one of the most promising materials for achieving plastic replacement in the age of energy and environmental crisis. However, their properties still cannot compete with those of petrochemical-based plastics, owing to insufficient molecular and/or microstructure designs. Herein, we utilize the Ti 3 C 2 T x -based MXene nanosheets for decorating carbon nanotube (CNT) and obtaining the structurally stable and highly dispersed dendritic hetero-structured MXene@CNT, that can act as multi-roles, i.e., polycondensation catalyst, crystal nucleator, and interface enhancer of polyester. The bio-based MXene@CNT/polybutylene furandicarboxylate (PBF) (denoted as MCP) nanocomposites are synthesized by the strategy of “in situ catalytic polymerization and hot-pressing”. Benefiting from the multi-scale interactions (i.e., covalent bonds, hydrogen bonds, and physical interlocks) in hybrid structure, the MCP presents exceptional mechanical strength (≈101 MPa), stiffness (≈3.1 GPa), toughness (≈130 MJ m −3 ), and barrier properties (e.g., O 2 0.0187 barrer, CO 2 0.0264 barrer, and H 2 O 1.57 × 10 −14 g cm cm −2 s Pa) that are higher than most reported bio-based materials and engineering plastics. Moreover, it also displays satisfactory multifunctionality with high reprocessability (90% strength retention after 5 recycling), UV resistance (blocking 85% UVA rays), and solvent-resistant properties. As a state-of-art high-performance and multifunctional material, the novel bio-based MCP nanocomposite offers a more sustainable alternative to petrochemical-based plastics in packaging and engineering material fields. More importantly, our catalysis-interfacial strengthening integration strategy opens a door for designing and constructing high-performance bio-based polyester materials in future.
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
PubMed
高影响因子
POLYMER
·
2018
·
IF 3.483
Youjun He,Sheng Gao,Zaijun Lu
Mussel adhesive proteins (MAPs) are of an excellent adhesive property . The catechol structure (i.e., 1, 2-dihydroxybenzene) of 3, 4-dihydroxy-phenylalanine (DOPA) plays a key role in MAPs adhesion. Inspired by the MAPs adhesion, we synthesized catechol-based benzoxazine monomers (BOZ-ca) via Mannich reaction of catechol, aniline and paraformaldehyde, and then the polybenzoxazine containing catechol groups (PBOZ-ca) was obtained through the ring-opening polymerization of BOZ-ca in this work. The structure of BOZ-ca was characterized by 1 H NMR, 13 C NMR and FTIR. Interestingly, the DSC results show that the autocatalytic polymerization effect of BOZ-ca owing to the existence of phenolic hydroxyl groups decreases the polymerization temperature of BOZ-ca by ca. 80 °C compared with common benzoxazine monomers. The adhesion study results indicate that the catechol structure of PBOZ-ca increases its lap shear adhesion strength by 53% compared with common benzoxazine monomers, up to ∼2.61 MPa. The introduction of mussel-inspired structure provides a new design routine for the improvement of polybenzoxazine adhesion property.
研究领域:
材料科学
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生物仿生学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Wenyan Zhang,Haoyu Zhang,Yirong Feng,Tingting Ma,Fengyang Liu,Shuangfei Zhao,Jiming Yang,Yuguang Li,Dong Ji,Weiwei Tang,Xiaowei Li,Zheng Fang,Wei He,Kai Guo
In this article, the photocatalytic polymerization of 5-hydroxymethylfurfural (HMF) was applied in the preparation of photo-generated humins (L-H) for the first time. The molecular weight and furan ring content of L-H would be increased by introducing HMF into low-molecular-weight humins (LMW-H) extracted from spoiled HMF under visible light. Compared with humins prepared by the thermal-acid method (A-H), the molecular weight of L-H was less than 800 g/mol; therefore, L-H exhibited great solubility in various solvents and high chemical reactivity for structure modification. Also, the structure units had great differences between L-H and A-H. A-H only consisted of 2,5-dioxo-6-hydroxyhexanal (DHH) and HMF, while L-H also included the 5-hydroxy-4-keto-pentenoic acid (HKPA) generated by reacting HMF with singlet-oxygen. Then, the furan-based polymers were obtained through the classic Diels–Alder (DA) reaction to realize resource utilization of L-H. HKPA units in L-H provided more reaction sites for DA reaction. Characterizations by nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectrum, microscopy, differential scanning calorimetry (DSC), and tensile properties proved that the polymer DA-L-H containing D–A bonds had self-healing properties, and the recovery efficiency could reach 92.8%. Through the utilization of biomass waste humins, the recycling of resources and sustainable economic development could be realized.
研究领域:
材料科学
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化学工程
·
可再生资源利用
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DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 11
·1331
·
IF 4.146
Siwei Zhao,Shaohua Jin,Huanmin Liu,Shengfu Li,Kun Chen
Due to their high absorption coefficient and long carrier lifetime, halide perovskites are promising candidates for photocatalysts. For this study, the antisolvent crystallization protocol and the colloidal crystal templating approach were combined to fabricate the highly crystalline cesium lead bromide perovskite with inverse opal morphology (IO-CsPbBr3). Scanning electron microscopy and transmission electron microscope images demonstrate the three-dimensional well-ordered porous structures of the IO-CsPbBr3and their single-crystalline features. The presented approach not only provides hierarchical porous structures but also enhances overall crystallinity. When used as catalysts to promote the polymerization of 2,2′,5′,2″-ter-3,4-ethylenedioxythiophene, the highly crystalline IO-CsPbBr3exhibits a superior photocatalytic performance compared to its polycrystalline counterpart. Furthermore, the morphology and the crystalline structure of the highly crystalline IO-CsPbBr3are well preserved under photocatalytic conditions. This novel approach enables the preparation of a halide perovskite inverse opal with high crystallinity.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 6
·1595-1601
·
IF 2.347
Cui Yifan,Jiang Zhe,Zhou Yu,Wang Qiang,Zhou Man,Wang Ping,Yu Yuanyuan
Conductive polyester non-woven fabric was prepared using horseradish peroxidase (HRP) catalytic agent, 3,4-ethylenedioxythiophene monomer and poly(p-styrenesulfonic acid) dopant. The electrical resistance of the prepared conductive polyester non-woven fabric was reduced to 1.3×10 4 Ω from 10 14 Ω of the raw polyester non-woven fabric because of the addition of poly(3,4-ethylenedioxythiophene) the conductivity of conductive polyester non-woven fabric decreased by about 60 % after 300 bending cycles. Notably, the temperature of the conductive polyester non-woven fabric increased by 73.1 °C after 150 s of light irradiation from a lamp source, while that of the raw polyester non-woven fabric increased by only 19.4 °C under the same conditions.
研究领域:
材料科学
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生物化学
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DOI
高影响因子
Industrial Chemistry & Materials
·
2023
·Vol. 1
·期 1
·129-139
·
IF 0
Hongxin Yang,Noor Ul Afsar,Qian Chen,Xiaolin Ge,Xingya Li,Liang Ge,Tongwen Xu
A series of poly(alkyl-biphenyl pyridinium) anion exchange membranes (AEMs) with a hydrophobic side chain were prepared for mono-/divalent anion separation using electrodialysis (ED). A poly(alkyl-biphenyl pyridinium) polymer was synthesized via superacid-catalyzed polymerization, and then quaternization was conducted using Menshutkin reactions with 1-bromopentane. The obtained quaternized product had excellent solubility in common organic solvents, making it flexible to form homogeneous membranes by a solution casting method. The introduction of a hydrophobic side chain resulted in a microphase separation structure in the membrane, which is favorable to the active transport of Cl− (higher Cl− flux of up to 3.37 mol m−2 h−1 at a 10 mA cm−2 current density) compared with that of SO42− ions giving a high permselectivity of 11.9 in a mixed salt (NaCl/Na2SO4) system. In addition, the prepared membrane exhibited excellent alkaline stability in successive ED tests. It showed an OH− flux of up to 3.6 mol m−2 h−1 with a permselectivity of 361.2 between OH− and WO42−, which is much higher than that of Neosepta ACS membrane. The ED results manifest that the poly(alkyl-biphenyl pyridinium) AEMs can be promising candidates for practical mono-/divalent anion separation in industry.
Keywords: Superacid-catalyzed polymerization; Anion exchange membrane; Mono-/divalent anion separation; Electrodialysis; Permselectivity.
研究领域:
高分子化学
·
膜科学
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电化学
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水处理技术
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DOI
RSC Advances
·
2019
·Vol. 9
·期 60
·34691-34698
·
IF 3.049
Wei Wu,Ahmat Ali,Ruxangul Jamal,Mihray Abdulla,Tursunnisahan Bakri,Tursun Abdiryim
In this paper, poly(3,4-ethylenedioxythiophene)/graphitic carbon nitride (PEDOT/g-C3N4) composites were prepared by the bromine catalysed polymerization (BCP) method with varying weight ratios of monomer to g-C3N4. For comparison, solid-state polymerization (SSP) and metal oxidative polymerization (MOP) methods were also used for the synthesis of PEDOT/g-C3N4 composites. Electrochemical determination of heavy metal ions (Cd2+ and Pb2+) was carried out by differential pulse voltammetry (DPV) on composite-modified glass carbon electrodes (GCEs), which were prepared by different methods. The obtained composites were analysed by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible absorption spectroscopy (UV-vis), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that the bromine catalysed polymerization (BCP) method is an effective way to prepare the PEDOT/g-C3N4 composite, and the combination of PEDOT with g-C3N4 can improve the electrochemical activity of electrode materials. And, the composite from the BCP method modified electrode (PEDOT/10 wt% g-C3N4/GCE) exhibited the widest linear responses for Cd2+ and Pb2+, ranging from 0.06–12 μM and 0.04–11.6 μM with detection limits (S/N = 3) of 0.0014 μM and 0.00421 μM, respectively.
研究领域:
分析化学
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环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Yicheng Fan,Xiuyuan Ni,Wenbin Fu
Photocatalyzed polymerization by semiconductors has recently contributed to the methods of polymer synthesis. In this work, we developed a new type of photocatalyzed polymerization with ring-opening polymerization of lactone. A complex catalyst was designed consisting of nitrogen-doped TiO2 (N–TiO2), iodonium salt (Ph2I+PF6−) and H2O. Poly(ε-caprolactone) (PCL) with a narrow molecular weight distribution was synthesized under visible light irradiation. By using electron spin resonance (ESR), in situ 1H-nuclear magnetic resonance (1H-NMR) and MALDI-TOF mass spectrometry, the mechanism studies clearly presented the reactions of the three components in the ternary catalyst. This polymerization was ruled by the route in which ε-caprolactone (ε-CL) was activated by H+. H+ was photogenerated from the oxidation reaction of H2O. Meanwhile, H+ was stabilized by the photogenerated PF6−, forming Brønsted acid H+PF6−. The relationship between the monomer conversions and PCL molecular weights was studied.
研究领域:
高分子化学
·
光催化
·
材料科学
·
有机合成
·
纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yifan Cui,Qin Chen,Wuwei Bao,Hao Yao,Zhenzhe Huang,Rui Ma,Miao Miao,Lizhi Sheng,Xinyang He
Flexible thermoelectric fabrics hold great promise for applications in smart wearable devices, particularly in areas such as self-powered sensing, energy harvesting, and human-machine interaction. However, with the rapid advancement of flexible electronics, higher standards are being set for the durability, integration, and multifunctionality of wearable electronics. Currently reported thermoelectric materials still struggle to meet these demanding requirements. In this study, a dual-catalytic polymerization strategy is proposed to fabricate PEDOT-based thermoelectric fabrics by synergizing enzymatic and chemical polymerization. Enzymatic polymerization contributes to forming dense conductive layers, while chemical polymerization enables rapid construction of a structural framework, resulting in PEDOT@Nylon fabrics with excellent electrical conductivity (90.91 S/m), good durability (stable performance after 3 h washing and 600 bending cycles), and stretchability. The thermoelectric fabric can serve as a self-powered temperature sensor for contact/non-contact hot-cold recognition and ambient temperature monitoring over a broad temperature range (ΔT ~ 40 K). Additionally, it functions as a strain sensor, capable of real-time and rapid monitoring of human motion signals by integrating a wireless transmission system (with a response time of ~0.16 s). This efficient (4 h) dual-catalytic polymerization strategy produces high-performance thermoelectric fabrics, promising for wearable devices, smart healthcare, human-computer interaction, and next-generation multifunctional fabrics.
研究领域:
材料科学
·
纳米技术
·
柔性电子学
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生物医学工程
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智能纺织品
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传感器技术
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能源材料
·
可穿戴医疗
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）