TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Jinglun Guo,Zhenling Shang,Yue Sun,Chenghao Li,Jianyi Xia,Yuxin Zou,Kang Du,Guoqiang Liu,Feng Zhou,Weimin Liu
Perfluoropolyether (PFPE) lubricant is widely used in plenty of cutting-edge technologies because of its extraordinary properties. However, poor boundary lubrication and creep limit their further applications. Here, we demonstrated a PFPE supramolecular gel with surface-functionalized Ti 3 C 2 T x as additives for highly efficient boundary lubrication and prevention of creep. It turned into an oily liquid at 124.5 °C, accompanied by a rapid decrease in viscosity. Additionally, the phase transition could be achieved by shear stress. This kind of gel reduced wear volume by 90.75% compared with pure PFPE oil. Its friction coefficient (∼0.113) varied slightly with time. Notably, its load-bearing capacity exceeded 1500 N. This work puts forward an approach to the preparation of PFPE-based supramolecular gel lubricant with surface-functionalized Ti 3 C 2 T x additive.
研究领域:
材料科学
·
润滑工程
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DOI
高影响因子
Soft Matter
·
2020
·Vol. 16
·期 22
·5203-5209
·
IF 3.14
Hongli Zhang,Junjie Cheng,Qiang Zhou,Qijin Zhang,Gang Zou
Discotic π-conjugated supramolecular assemblies, especially with chiral supramolecular nanostructures, have been attracting growing research interest due to their significant optoelectronic properties and the possibilities of their applications in the new generation of organic semiconductors. However, the impact of supramolecular chirality on their mechanical and electrical performances remains poorly understood. Herein, a series of optically active supramolecular gels were formed from achiral triphenylene derivatives by introducing limonene as the chiral source. Owing to the well-ordered supramolecular packing, the homochiral supramolecular gels exhibited greater mechanical strength and higher conductivity, compared to heterochiral architectures. The impact of supramolecular packing in homochiral or heterochiral assemblies on their resulting mechanical and electrical performances was investigated in detail, which might be of great fundamental value for the rational design of chiral π-conjugated supramolecular nanostructures for applications in chiral optoelectronics.
研究领域:
材料科学
·
有机化学
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DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 12
·3223-3231
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IF 2.41
Xing Pengyao,Chu Xiaoxiao,Du Guangyan,Ma Mingfang,Li Shangyang,Hao Aiyou
Here, we report a dual stimuli-responsive organogel which can stabilize graphene oxide (GO) in apolar solvents. The gelator 1-octadecyl-ureido-naphthalene (OUN) was synthesized, and it could form organogel in toluene and xylene. The resultant gels can respond to thermal and anion stimuli, bringing about fluorescent changes. Thin nanoribbons are entangled together to form three dimensional networks that can immobilize solvents in gel, providing large superficial area to interact with GO sheets. The addition of GO influences the gel properties, which are studied through rheological, fluorescent, and DSC measurements.
研究领域:
材料科学
·
化学
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DOI
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Yongzhen Wang,Songquan Wu,Xingru Yan,Tao Ma,Lu Shao,Yuyan Liu,Zhanhu Guo
A series of alkyl bicarbamates supramolecular organogelators were synthesized with different structures and lengths of alkyl chains. The driving forces for the self-assembly of small molecules, including the intermolecular H bonding, π-π stacking and van der Waals interactions, played an important role in the formation of different 3D network structures, i.e., fibers, ribbons, sheets, and prisms. And a probable formation process of the gel networks was proposed. Furthermore, the phase-selective gelling performances were investigated for oil removal from aqueous solution. Interestingly, the gelling properties were found to be affected by the length and structure of alkyl chains, while some gelators with intermediate alkyl chain lengths could effectively gel all the tested oils from water surface within 15 min, such as Russian crude oil, diesel , gasoline, soybean oil, peanut oil, olive oil, cyclohexane , hexane and ethyl acetate. Advantageously, fast gelation , high rate of oil removal (>95%) and excellent oil retention rate (close to 100%) were realized in the recovery of oil spills from water surface. This kind of supramolecular gelators demonstrates good potential applications in the delivery or removal of organic pollution from oil/water mixtures.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jinglun Guo,Cheng Zeng,Pengxi Wu,Guoqiang Liu,Feng Zhou,Weimin Liu
Low interlaminar shear stress, high mechanical strength, and tunable structure make Ti3C2Tx MXene a burgeoning star as solid lubricants and lubricant additives. Although surface modification strategy can improve its compatibility with base oils, it will eventually settle due to gravity. Additionally, base oils are prone to leakage, creep, and volatilization, which limit their application. To address these issues, supramolecular gels with surface-modified Ti3C2Tx were conceived. Apart from the lubrication effect, the high thermal conductivity of Ti3C2Tx MXene accelerated the phase transition rate of supramolecular gels. The thermal-reversible and creep-resistant properties distinguish them from other conventional lubricants. The tribological tests showed that the 500 solvent neutral (SN) supramolecular gel with 0.10 wt % Ti3C2Tx-octadecylphosphonic acid (Ti3C2Tx-ODPA) reduced the coefficient of friction (COF) by 46.32% and wear volume by 81.18% compared with pure 500SN oil. Moreover, they also performed well in load-carrying capacity, temperature tolerance, and speed adaptability. This work puts forward a new approach to prepare MXene-based lubricants tailored for some severe lubrication conditions. These exceptional features enable their application in rolling bearings, some gears, and other low maintenance mechanisms.
研究领域:
材料科学
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机械工程
·
化学工程
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2016
·Vol. 217
·期 10
·1197-1204
·
IF 2.495
Jia Zhang,Wei Ji,Tian Liu,Chuanliang Feng
Syneresis property limits the further application of Kappa-carrageenan (κ-CG) in cell culture scaffold. To address this problem, κ-CG hydrogel is tailored by blending with a C2-symmetric benzene-based supramolecular gelator (B2). Scanning electron microscope (SEM) and Fourier transform infrared (FT-IR) spectroscopy confirm the semiinterpenetrating (semi-IPN) structure of the blended hydrogels and their wettability or thermal stability is also found to be improved. Based on the reduced syneresis, the growth and proliferation of the cultured HCT 116 cells on the blended hydrogels is enhanced compared with pure κ-CG hydrogels. This study paves an easy and feasible way to achieve stable and biocompatible κ-CG/B2 blended hydrogels with high water retention and it helps broaden the promising applications of κ-CG hydrogels in tissue engineering.
研究领域:
材料科学
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生物医学工程
·
组织工程
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DOI
高影响因子
Soft Matter
·
2017
·Vol. 13
·期 45
·8609-8617
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IF 3.889
Suansuan Wang,Kaiqiang Liu,Sheng Gao,Jinqiang Wang,Ravi Kumar Marella,Yu Fang
A new class of bisurea derivatives bearing tetrahydroxy groups have been proven to be non-gelators in water and various organic solvents even under long-term sonication or efficient heating treatment. We found that it is possible to trigger physical gelation behaviour by constructing dynamic covalent bonding. The results show that formation of dynamic covalent bonding between the borate anion and ethanediol substituent in these bisurea derivatives brings about rapid physical gelation at ambient temperature in a mixture of DMSO and water. During dynamic covalent bonding-triggered gelation, the stepgrowth polymerization from the B–O bonds would increase the size of the molecules and reduce the entropy of mixing as well as facilitate ion–dipole interactions in the linear polymeric gelators. They would drive a self-assembly transition and boost the construction of gel networks in coordination with α-tape urea–urea hydrogen bonding. The gelation mechanism was explored by 1H NMR, FTIR and rheology techniques. Moreover, the resulting gels are transparent and thixotropic, and could be turned into the sol state under CO2 or water-stimulus. Furthermore, they are stable in the presence of HAuCl4 and alkali. Therefore, they would afford another new medium for the growth of Au nanocrystals via in situ reduction and a new sensing medium for detecting Hg2+ ions.
研究领域:
化学
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材料科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Zhong-Mei Xian,Guo-Long Song,Zeng-Ni Xiang,Jun-Jie Zhou,Fu-Hui Gao,Jia-Xi Mei,Xue-Zhen Zhang,Fan Su,Yu-Long Xiao,Guang-Ming Liang,Mei-Yu Xu,Yao Xiao
Shape-stabilized phase change materials (PCMs) are widely used in thermal energy storage because of their shape stability, excellent PCM load capacity and energy storage performance. Herein, a straightforward strategy was adopted to design and synthesize zirconium based three-dimensional porous metal supramolecular gel (MSG) as support material in PCM. The porous support material exhibits strong hydrogen-bond interactions with polyethylene glycol (PEG) molecules, maintaining the shape stability of the PEG matrix even at 120 °C. Meantime, the load capacity and energy storage capacity of the prepared composite PCM reached an astonishing 99.2 wt% and 95.5 %, respectively. In addition, after 30 heating/cooling cycles, the phase-change composite showed high durability. Latent heat and phase transition temperature did not change significantly.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Pharmaceutics
·
2023
·Vol. 15
·期 8
·2161
·
IF 5.4
Fen Zheng,Wei Du,Minggang Yang,Kaige Liu,Shanming Zhang,Long Xu,Yong Wen
Bacterial infections, especially antibiotic-resistant bacterial infections, pose a significant threat to human health. Supramolecular gel with innate antibacterial properties is an advanced material for the treatment of bacterial infections, which have attracted great attention. Herein, a reactive oxygen species (ROS)-responsive innate antibacterial supramolecular gel is developed by a bottom-up approach based on phenylalanine and hydrazide with innate antibacterial properties. The structure of gelators and intermediate products was characterized by proton nuclear magnetic resonance (1H NMR) and a high-resolution mass spectrum (HRMS). The results of1H NMR and the Fourier transform infrared spectrum (FT–IR) experiment disclosed that hydrogen bonding and the π–π stacking force are the important self-assembly driving forces of gelators. The microstructure and mechanical properties of gel were studied by Scanning electron microscope (SEM) and Rheometer, respectively. An in vitro degradation experiment proved that the gelator has ROS-responsive degradation properties. The in vitro drug release experiment further manifested that antibiotic-loaded gel has ROS-responsive drug-release performances. An in vitro cytotoxicity experiment showed that the supramolecular gel has good biocompatibility and could promote cell proliferation. The in vitro antibacterial experiment proved that the supramolecular gel has excellent inherent antibacterial properties, and the antibacterial rate againstStaphylococcus aureus(S. aureus) andEscherichia coli(E. coli) was 98.6% and 99.1%, respectively. The ROS-responsive supramolecular gel as a novel antibacterial agent has great application prospects in treating antibiotic-resistant bacterial-infected wounds and preventing the development of bacterial resistance.Keywords:antibacterial gel;supramolecular gel;ROS-responsive;low molecular weight gelator;biocompatibility
研究领域:
材料科学
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医学
·
生物学
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产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 5
·e4845
·
IF 3.259
Ruru Xue,Saisai Wei,Xuelin Dong,Tingyu Zhu,Jianhui Yuan,Lu Feng,Qin Wang,Yajiang Yang,Hong Wang
Meso-tetra (carbonyl phenyl) porphyrin palladium (denoted as Pd-TCPP), a typical organometallic compound, was used as phosphor and entrapped in micelle-hybridized supramolecular hydrogels. As a novel matrix material of phosphors, the hybrid system was comprised of two ordered structures: a supramolecular 3D network structure formed by the self-assembly of the gelator and the micelles formed from a Gemini surfactant. The dual-ordered structure of the system was verified by SEM, TEM and fluorescent optical microscopy. By contrast with corresponding mono-ordered structure, the room temperature phosphorescence (RTP) of Pd-TCPP was greatly enhanced by the dual-ordered structure of the system. The enhancement mechanism of RTP was studied by hydrophobicity of the system, RTP quenching and disassembly of supramolecular aggregates. Enhanced RTP could be attributed to the efficient inhibition of the non-radiative transition of Pd-TCPP by dual-ordered structures. Significantly, the RTP intensity of Pd-TCPP can be adjusted by changing the concentration of Gemini surfactants. Furthermore, deoxygenation was not required in this hybrid system in comparison with corresponding mono-component systems.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Yuanjing Ding,Junkai Gao,Zhongzhi Chen,Qian He,Mengsheng Xia,Pengtao Xu,Yan Cao,Yan Chen
Based on the durability of fibroin and the biocompatibility of sericin, researchers are exploring ways to maximize their advantages by combining them in the biomedical field . Fortunately, silk cocoon shell (SC) offers a natural composite material of fibroin and sericin. However, the inherent hydrophobicity of SC, the random arrangement connection of fibers, and the protection provided by the outer sericin limit its application in purifying oil wastewater. In this work, a cost-effective method was developed to improve the hydrophilicity of SC and the mechanical properties of SC by utilizing obsoleted SC as a matrix as well as by dissolving portions of sericin proteins. The polydopamine particle (PDP) was utilized as the intermediate modification layer and a supramolecular gel (SMG) was introduced to the surface of SC, further improving the surface's hydrophilicity of SC. The study indicated that SC@P-SMG has excellent mechanical properties, favorable anti-fouling properties, and superior self-cleaning ability. Furthermore, when the SC@P-SMG was applied in water purification , it could achieve multifunctional applications such as purifying wastewater containing emulsified oil and Pb 2+ ions, methylene blue (MB), and oil-water mixture separation. This work provided innovative ideas to maximize the benefits of combining fibroin and sericin.
研究领域:
材料科学
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环境科学
·
生物医学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2017
·Vol. 55
·期 16
·2585-2593
·
IF 2.952
Xiang-Yun Du,Si-Si Liu,Cai-Feng Wang,Guan Wu,Su Chen
A series of the self-healing gels facilely fabricated by VI (N-vinyl imidazole) and MAH-β-CD (β-cyclodextrin grafted vinyl carboxylic acid groups) via bottom-ignited frontal polymerization (BIFP) initiated by magnetocaloric effect. Once ignited the bottom phase, the heat upward propagates to generate the “front” in the upper phase. Then, no further energy is added to maintain the reaction and the whole polymerization process experiences within minutes. In this system, the dependence of frontal velocity and temperature, along with morphology, swelling capacity, mechanical property, and self-healing efficiency, on the preparation parameters is investigated. Interestingly, the gels show good swelling capacity in the organic solvent, comparatively almost no absorption in water. Moreover, the as-prepared gels exhibit excellent auto-healing properties without any external stimuli at ambient temperature. The healed sample possesses 97% recovery of its tensile strength after 8 h healing time, which relies largely on the host–guest interaction between VI and MAH-β-CD. The results demonstrate that FP can be utilized as an efficient and energy-saving method to synthesize self-healing supramolecular gels. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017 , 55 , 2585–2593
研究领域:
材料科学
·
高分子化学
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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）