MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Wentao Hao,Chenchen Ke,Xianxiang Pan,Tengfei Qi,Wenping Wang,Wenjuan Li,Wen Yang
Fluorescent supramolecular materials have attracted a lot of attention over the past few decades. However, those can respond to multiple stimuli are not often reported, especially for the nonconventional fluorescent materials. Here, a supramolecular material is reported that can respond to temperature/electrical heating, humidity, volatile acids/organic amines, and mechanical strain. This material is prepared by physical mixing oligomeric polyethyleneimine (o-PEI) and oligomeric polyacrylic acid (o-PAA). Although they are almost non-fluorescent, their combination produces bright fluorescence, and the emission bands shift to longer wavelengths as the amount of o-PAA increases. Calculations based on Density Functional Theory (DFT) show that there are strong noncovalent interactions between o-PEI and o-PAA, resulting in through-space conjugation and cluster-triggered emission. By studying the relationship between emission intensity, temperature, and molecular motion, the dependence of emission intensity on relaxation time is established, which will provide insight into the luminescence origin of nonconventional fluorescent materials. In addition, this material shows good self-healing ability. The luminescence, responsiveness and self-reparability are all related to the strong but reversible noncovalent bonds that link the o-PEI and o-PAA. This work not only highlights the value of supramolecular polymers, but also enriches the research of nonconventional fluorescent materials.
研究领域:
材料科学
·
化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Fangshan Li,Heng Wang,Yuchao Ke,Yuan Hu,Ru Xia
[AMIm]Cl@GNP/SBR composites were prepared by blending ionic liquid 1-allyl-3-methylimidazolium chloride salt([AMIm]Cl) modified graphene nanoplatelets (GNP) and styrene-butadiene rubber (SBR). The mechanical and thermal properties as well as the structure–activity relationship of the obtained composites based on the modified filler were investigated under the synergistic effect of non-covalent and covalent bonding. The experimental results indicated that the modification of GNP by [AMIm]Cl occurred under mild conditions. The dispersibility of [AMIm]Cl@GNP in SBR was enhanced by its participation in vulcanization and the synergistic effect of non-covalent and covalent cross-linking networks such as cation-π, π-π, and hydrogen bonds. This improvement led to an increase in the interfacial bond strength of the composites and a reduction in the interfacial thermal resistance. These effects resulted in both reinforcement and thermal conductivity properties. The tensile strength and elongation at break of [AMIm]Cl@GNP/SBR composites increased from 18.2 to 22.9 MPa and from 737.9% to 923.5%, respectively, when the modification ratio of [AMIm]Cl was 1% and the loading of [AMIm]Cl@GNP was only 4 phr (mass ratio). At the same time, the thermal conductivity in the vertical direction of the composites increased from 0.25 to 0.44 W/(m·K), and the thermal conductivity in the horizontal direction increased from 0.27 to 0.81 W/(m·K). Highlights Modified powder [AMIm]Cl@graphene nanoplatelets were prepared; [AMIm]Cl@graphene nanoplatelet/styrene-butadiene rubber blend was prepared; Mechanical properties of blends significantly improved over blank; The horizontal thermal conductivity of the blends increases obviously; The vertical thermal conductivity of the blends was improved.
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
Nature Communications
·
2021
·Vol. 12
·期 1
·1-10
·
IF 14.919
Wang Yuyan,Huang Xin,Zhang Xinxing
Self-healing materials integrated with excellent mechanical strength and simultaneously high healing efficiency would be of great use in many fields, however their fabrication has been proven extremely challenging. Here, inspired by biological cartilage, we present an ultrarobust self-healing material by incorporating high density noncovalent bonds at the interfaces between the dentritic tannic acid-modified tungsten disulfide nanosheets and polyurethane matrix to collectively produce a strong interfacial interaction. The resultant nanocomposite material with interwoven network shows excellent tensile strength (52.3 MPa), high toughness (282.7 MJ m ‒3 , which is 1.6 times higher than spider silk and 9.4 times higher than metallic aluminum), high stretchability (1020.8%) and excellent healing efficiency (80–100%), which overturns the previous understanding of traditional noncovalent bonding self-healing materials where high mechanical robustness and healing ability are mutually exclusive. Moreover, the interfacical supramolecular crosslinking structure enables the functional-healing ability of the resultant flexible smart actuation devices. This work opens an avenue toward the development of ultrarobust self-healing materials for various flexible functional devices.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·Vol. 34
·期 10
·3370-3379
·
IF 3.4
Weineng Lu,Jinde He,He Zhang,Jinqing Qu
The preparation of hydrogels with excellent mechanical properties by the synergistic interaction of various non-covalent bonds is one of the research focuses. However, the emerging applications put forward requirements on the function, in addition to the mechanical properties. Therefore, we prepared a physically cross-linked Schiff base fluorescent hydrogel Poly(methacrylic acid-co-poly(ethylene glycol) methyl ether acrylate-co-(Z)-N-(4-(2-((1H-indol-3-yl)methylene)hydrazino-1-carbonyl)phenyl)methacrylamide) (P(MAA-PEGA-IHPMA)) by solvent exchange method, which greatly improved the mechanical properties of the hydrogel, and realized the versatility of the hydrogel. The hydrogel improved the binding energy and crosslinking density through the synergistic effects of non-covalent bonds such as hydrophobic association, hydrogen bonding and metal complexation. Therefore, the hydrogel had excellent mechanical properties (the maximum tensile fracture stress and strain are 1.45 MPa and 401%, respectively, and the maximum toughness was 3.41 MJ/m 3 ), and could be regulated by changing the content of IHPMA. Moreover, its fluorescence properties could be controlled by the concentration of Zn 2+ . In addition, P(MAA-PEGA-IHPMA) hydrogel also showed temperature response, solvent-responsive fluorescence, antibacterial properties and shape memory function. The fluorescent hydrogel with high strength and toughness had potential applications in temperature control materials, anti-fatigue materials and flexible sensors.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Extreme Mechanics Letters
·
2021
·
IF 4.567
Xueqi Zhao,Jingping Wu,Yifan Zhou,Yudong Pan,Tongqing Lu,Xiaoping Song,Jian Hu
Physical hydrogels, composed of non-covalently crosslinking three dimensional polymer networks and a large amount of water, have drawn much attention due to their excellent mechanical properties such as high toughness, self-healing, self-recovery, and shape-memory. But the fatigue behaviors of physical hydrogels, especially the role of non-covalent bonds in the fatigue process, have not been well studied. Here we study fatigue damage and fatigue fracture of two kinds of physical hydrogels based on hydrogen bonding (H-bonding): poly(vinyl alcohol)/poly(acrylic acid) (PVA/PAA) gels with weak H-bonding (weak gels) and PVA/PAA-LiCl gels with strong H-bonding (strong gels). For the fatigue damage of uncut samples, both the weak and strong gels are fatigue strengthened in small deformation by stretch-induced H-bonding rearrangement, but are fatigue damaged in large deformation by chain sliding. For the fatigue fracture of precut samples, both the weak and strong gels show no measurable fatigue threshold, but the strong gel can mitigate crack growth. These results reveal the intrinsically weak non-covalent bonds cannot effectively increase the fatigue resistance of physical hydrogels. This work provides a deep perspective for developing novel anti-fatigue hydrogels.
研究领域:
材料科学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2019
·
IF 3.714
Yang Chen,Zhenshun Li,Xiangzhou Yi,Hairui Kuang,Baomiao Ding,Weiqing Sun,Yangchao Luo
Ovalbumin (OVA) is widely used in the food industry due to its good emulsifying properties. However, polyphenols and polysaccharides in food may influence the interfacial properties of OVA. In our work, carboxymethylcellulose (CMC) and tannic acid (TA) were mixed with OVA at pH 4.0 and 7.0. The results indicated that there was noncovalent binding among OVA, CMC and TA, which affected the spatial structures of OVA. The emulsifying ability of OVA stabilized emulsions decreased after binding with CMC and/or TA, due to the reduction in interfacial activities. Additionally, TA reduced the emulsion stability. However, the stability of the emulsions with and without TA could be improved by CMC, especially at pH 4.0. CMC reduced the binding affinity of OVA and TA and increased the electrostatic repulsion of the continuous phase, resulting in increased stability against creaming. Our study was conducted to provide a reference for OVA use in the food industry.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Pengfei Wu,Zongwei Cai,Hangbiao Jin,Yuanyuan Tang
Polyvinyl chloride (PVC) plastics are easily embrittled and decomposed to microplastics in an aquatic environment. The plasticizers such as bisphenol A (BPA), bisphenol S (BPS) and their analogues might be released and adsorbed by the PVC microplastics causing consequential pollution to the ecosystem. Herein, a systematic study was performed to determine the adsorption mechanisms of five bisphenol analogues (BPA, BPS, BPF, BPB and BPAF) on PVC microplastics. The maximum adsorption efficiency reached 0.19 ± 0.02 mg·g −1 (BPA), 0.15 ± 0.01 mg·g −1 (BPS), 0.16 ± 0.01 mg·g −1 (BPF), 0.22 ± 0.01 mg·g −1 (BPB), and 0.24 ± 0.02 mg·g −1 (BPAF) at PVC dosage of 1.5 g·L −1 . The kinetics study shows that the adsorption processes can be divided into three stages including external mass transport, intraparticle diffusion and dynamic equilibrium. The isotherm modeling shows a better fit of the adsorption results to the Freundlich isotherm compared to the Langmuir model. The thermodynamic study indicates the adsorption of all bisphenols as exothermic processes. Furthermore, the adsorption mechanisms of bisphenols were explicated intensively, with respect to hydrophobic interactions, electrostatic forces, and noncovalent bonds. A positive effect of hydrophobic interactions was identified for bisphenols adsorption on PVC microplastics, but an obvious inhibition by electrostatic repulsions was revealed for BPF due to its ionization in the neutral solution. In addition, noncovalent bonds (hydrogen and halogen bonds) may promote the adsorption of bisphenols on PVC microplastics. Finally, the desorption and competitive adsorption of five bisphenol analogues on the microplastics were provided together with a perspective for future works.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Lei Li,Yun Fang,Yongmei Xia,Chunling Bo,Ye Fan
Acted as the second component of fatty acid vesicles (FAV), almost all reported chemicals except for bio-incompatible cationic amphiphiles caused a one-side pH window extension of FAV whilst the other-side shrinkage accordingly. We recently found that dodecanol could partially compensate the alkaline-side pH window shrinkage of FAV when the acidic-side was extended by sodium dodecylsulfate (SDS). Therefore, we guess that if one single small molecule played two − in − one function as both SDS and dodecanol done on the different-side pH window, it might cause a two-side pH window extension of FAV entering into near-neutral pH. Taking conjugated linoleic acid (CLA) as the model fatty acid, ribose, glucose, glucosamine and acetyl glucosamine as the models of the second component, the influence on the pH window extension for the FAV of CLA by each of the monosaccharides and the involved noncovalent bonding interactions are investigated by laser Tyndall effect, pH titrimetry, transmission electron microscopy, dynamic light scattering, ultraviolet absorbency, isothermal titration calorimetry measurement and binding energy calculation. The two-side pH window extension for the FAV of CLA is realized by aid of the two − in − one function of monosaccharides that create H-bonding interaction with the FAV surface and thus enhancing hydrophobic self-assembly of CLA. It is crucial for self-assembling FAV as primitive cell membranes and applying it as modern nutrient carriers or drug delivery systems in the physiological pH range. We propose a practical microenvironmental polarity criterion based on the experimental results to predict how the second component to extend the pH window of FAV: If the second component made the FAV surface more hydrophobic on the alkaline-side pH window while more hydrophilic on the acidic-side via molecular interactions, it could drive the corresponding-side pH window extension, otherwise the corresponding-side pH window shrinkage.
研究领域:
生物化学
·
药物递送系统
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Shuai Peng,Longqian Xu,Shihai Deng,Yunfeng Mao,Zhenyu Zhao,Deli Wu
The solar-driven evaporation technology provides a green alternative for solving water scarcity. However, it remains challenging to improve the steam conversion efficiency due to the difficulties in simultaneously coordinating light absorbance, water regulation, and thermal management for broadband solar evaporators. Here, an unconventional solar evaporative modulator material─ultra-interfacial adherent dimethyl sulfoxide polyvinyl alcohol (DMSO–PVA) hydrogel (DPH) was presented. The material is based on the regulation of the PVA–PVA intra- and PVA–water interchain hydrogen bonds by DMSO, which established an adaptive high-cross-linking and homogeneous network. The consequent ultra-thin hydrogel exploited an insulating polymer backbone and intracavity hydration domain to simultaneously improve the light absorption and thermal localization and activate the water molecule. As a proof-of-concept, under 1 sun illumination (1 kW m–2), a DPH-based graphene fiber membrane [ultra-thin hydrogel membrane (UHM)] achieved 97% light absorption, 2.33 kg m–2 h–1 water evaporation, and high salt-resistant evaporation (1.48 kg m–2 h–1 under 25 wt % brine). Compared to the pure graphene membrane, UHM increased the vaporization by 64%, decreased the heat diffusion by over 14-folds, and reduced the environmental heat loss by 2.6-folds. DPH possesses scalability and versatility in bridging nanoscale photothermal materials and solar evaporator geometric architecture and will facilitate the possibility of advanced solar thermal applications.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic and Nano-Metal Chemistry
·
2021
·
IF 1.716
Weiqiang Xu,KaiKai Hu,Shouwen Jin,Yuting Zhang,Daqi Wang
Transition metal carboxylates with O- and N-donor ligands are interesting for their structural features. Seven novel isonicotinamide(inic)-based metal complexes of [Cd(inic)2(L1)2(H2O)2] · 2H2O (1) (L1 = 2-chloronicotinate), [Cd(inic)2(L2)2(H2O)2] (2) (L2 = 2,4-dichlorobenzoate), [Cu(inic)2(L3)2] (3) (L3 = 4-chlorophenoxyacetate), [Cu3(inic)6(L4)2(HL4)2(H2O)2] · 2H2O (4) (L4 = azelate), [Zn(inic)2(L1)2(H2O)2] · (inic) · H2O (5), [Zn(inic)(L5)(H2O)4] (6) (L5 = 3-nitrophthalate) and [Zn2(inic)2(L6)2] · 5H2O (7) (L6 = 1,4-cyclohexanedicarboxylate) have been obtained by the introduction of the carboxylates by the common solution method and are structurally featured by different techniques of EA, IR spectra, TG and SCXRD analysis. The X-ray studies told that these complexes display mononuclear to trinuclear structures with octahedral/square-pyramidal geometry around the Zn2+, trigonal bipyramidal/octahedral at the Cu2+ and octahedral for the Cd2+. The inic in 1–7 are coordinated only in monodentate fashion with its ring N, while 5 has the lattice inic. The carboxylates coordinated to the metal in monodentate, chelating bidentate and bridging bidentate fashions. The pair of complementary N-H···O H-bonds from the CONH2 of the inic were found in all compounds except 7. Except 1 and 2, all other compounds bear the CH-O contacts from the pyridine CH of the inic. The intricate intra- and intermolecular classical H-bonds, CH-N, CH-O, CH-Cl, CH2-O, O-N, O-O, Cl-O, Cl-Cl, CH-π, CH2-π, C-π, N-π, Cl-π and π-π associations are elucidated by the X-ray crystallographic studies, which push the discrete complexes into high-dimensional ordered supramolecular structures.
研究领域:
化学
·
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qile Chen,Tong Ye,Shujuan Yang,Linwang Fan,Chaonan Shang,Yuhong Feng,Jiacheng Li,Yujuan Wang,Gaobo Yu,Jun Dai
The effective management of Type 2 Diabetes Mellitus (T2DM) depends on the development of streamlined, sustainable, and intelligent delivery systems. In this context, targeted stimulus-responsive Pickering emulsions (PEs) derived from biomass have emerged as a promising candidate. However, the interfacial films of PEs exhibit insufficient strength to endure the harsh gastric environment and lack the capability for targeted and responsive delivery. To address these limitations, an amphiphilic phenylboronic acid-functionalized sodium alginate (SA-PBA) was integrated into a ternary complex platform composed of soybean protein-isolated polyphenol (SPI-PSPAs), where it self-assembled into soft colloidal particles through multiple non-covalent interactions. A multiscale coupling methodology was proposed to investigate and elucidate the structure-function relationship between interfacial characteristics (e.g., thickness, viscoelasticity, and microstructures) and the stability of PEs, thereby providing a foundation for effectively controlling their targeted delivery properties. Notably, owing to the enhanced strength of the interfacial composite particle films, the PEs demonstrated the ability to withstand the harsh gastric environment while maintaining their structural integrity. Furthermore, the self-assembly process of the soft SA-PBA@SPI-PSPAs colloids could be modulated by external glucose stimuli, enabling the targeted and intelligent release of PSPAs in the intestinal environment. Consequently, the well-designed PE system achieved intestinal-targeted responsive release effects, highlighting the potential of the natural α-glucosidase (αG) inhibitor PSPAs as a viable clinical treatment for T2DM.
研究领域:
食品科学
·
生物医药
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 28
·12068-12078
·
IF 3.288
Hongtao Liu,Huafeng Tian,Yuanyuan Yao,Aiming Xiang,Haisong Qi,Qiangxian Wu,A. Varada Rajulu
Graphene oxide (GO) plays an important role in improving the mechanical properties and flame resistance of materials. In this work, polyimide (PI) composite foams were in situ generated by introducing modified GO based on a novel method. GO was modified by the interaction of its surfactant groups with dopamine (Do) using noncovalent bonds, to facilitate its dispersion in the PI matrix. The π–π conjugation was confirmed between GO and Do. Chemical interactions occurred between GO and PI through the reaction between the active groups on GO and –NCO of isocyanates. The resulting PI composite foams were characterized for their morphological, structural, mechanical, thermal and flame retardant properties. The cell structure of PI composite foams was uniform. Meanwhile, the compressive strength of composite foams significantly increased from 130 kPa to 163 kPa, resulting in a distinct enhancement in mechanical properties. The thermal stability of the composite foams was highly enhanced by GO as evidenced by the decreased mass loss during the maximum decomposition stage and increased residue at 800 °C. Furthermore, the values of limited oxygen index (LOI) of PI foams increased from 42.0% to 44.5%, while the PI composite foams exhibited self-extinguishing property. Therefore the modified GO dramatically improved the mechanical, thermal and flame resistance properties of PI foams.
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
危险品化学品经营许可证（带存储）