APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Zijian Gao,Lijie Duan,Yongqi Yang,Wei Hu,Guanghui Gao
The mussel-inspired polymeric hydrogels have been attractively explored owing to their self-repairing or adhesive property when the catechol groups of dopamine could chelate metal ions . However, it was a challenge for self-repairing hydrogels owning high mechanical properties . Herein, a synergistic strategy was proposed by combining catechol-Fe 3+ complexes and hydrophobic association. The resulting hydrogels exhibited seamless self-repairing behavior, tissue adhesion and high mechanical property. Moreover, the pH-dependent stoichiometry of catechol-Fe 3+ and temperature-sensitive hydrophobic association endue hydrogels with pH/thermo responsive characteristics. Subsequently, the self-repairing rate and mechanical property of hydrogels were investigated at different pH and temperature. This bio-inspired strategy would build an avenue for designing and constructing a new generation of self-repairing, tissue-adhesive and tough hydrogel.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2020
·
IF 3.286
Lei Hu,Limin Zang,Wusheng Zuo,Qifan Liu,Chao Yang,Chunliu Liang,Jianhui Qiu
The acquisition of high energy density for aqueous supercapacitors (SCs) is effective in extending the operating voltage and increasing the capacitance, which has drawn a great deal of attention in recent years. A scalable approach has been proposed by dip coating and carbonizing tannin-Fe 3+ (TA-Fe 3+ ) coordination compounds to prepare fabric electrodes, which can provide tannin carbon (TC) and Fe 3 O 4 for extended voltage windows and high specific capacitances, respectively. A fabric electrode with a chemically stable carbon core-shell structure was shown to improve its decomposition overpotential of water, which contributed to a wide operating voltage of 2.4 V for aqueous symmetric supercapacitors (SSCs). The assembled all solid-state SSCs achieved both an ultrahigh energy density of 51.26 μWh cm −2 , which was higher than most SSCs and even some asymmetric SCs, and the ability to connect them in series to function as practical energy storage devices. This work opens up the possibility for high operating voltage aqueous SCs and even more possibilities for SCs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Xiaoxia Ye,Yiwen Cui,Le Ke,Kaiyang Gao,Xin Huang,Bi Shi
A robust and 3D superhydrophobic composite sponge was facilely prepared by stable coating of multiple walled carbon nanotubes (MWCNTs) onto melamine sponge (MS) using polyphenol-Fe 3+ complexes as the low-cost and efficient adhesives. The as-prepared superhydrophobic composite sponges featured ultra-low density, large porosity, high robustness and elasticity, as well as flame resistance. The loading of MWCNTs influenced the superhydrophobicity of sponge, and the optimized loading of MWCNTs was determined to be 3.0%, with a water contact angle of 159.8°. The 3D superhydrophobic sponge exhibited high absorption capacity to a wide range of oils and organic solvents , up to 38–127 times of its own weight dependent on the variety of oil and organic solvent. After 10 recycles of repeative absorption, the loss of absorption capacity was as low as 0.9% per cycle. The 3D superhydrophobic sponge was also applied for continuous separation of spilled oil from water with a separation efficiency of 97%. Our approach could also be extended for coating other carbon materials on MS, including graphene and activated carbon. The resultant sponges were still superhydrophobic and exhibited high separation ability for immiscible oil/water mixture.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 10
·6011-6025
·
IF 4.21
Liu Longxiang,Pan Ying,Zhao Yuyu,Cai Wei,Gui Zhou,Hu Yuan,Wang Xin
Abstract Poor washing durability still poses a big challenge to the practical applications of flame-retardant fabrics. Herein, a facile and eco-friendly dip-coating approach is proposed to fabricate durable flame-retardant and superhydrophobic polyester–cotton (PTCO) fabrics. Self-assembled depositions of diethylenetriamine penta(methylene-phosphonic acid) (DTPMP) and ferric ion (Fe 3+ ) were applied on PTCO fabrics through coordination interaction. Owing to the intumescent effect of DTPMP–Fe 3+ complexes, DTPMP–Fe 3+ -coated fabric self-extinguished in the horizontal flame testing. Polydimethylsiloxane (PDMS) was then applied on DTPMP–Fe 3+ complexes to impart the flame-retardant PTCO fabrics with superhydrophobicity (water contact angle: 155.6°) and self-cleaning properties. Especially, the washing durability of DTPMP–Fe 3+ -coated PTCO fabrics was improved by the modification of PDMS. The DT/Fe-8BL@PDMS sample still achieved self-extinguishing in the horizontal flame testing even after 12 laundering cycles. Graphic abstract Flame-retardant and superhydrophobic polyester–cotton fabrics are fabricated through the deposition of DTPMP–Fe 3+ complexes and further modification of PDMS.
研究领域:
材料科学
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纺织工程
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yaran Wang,Ting Wei,Yangcui Qu,Yang Zhou,Yanjun Zheng,Chaobo Huang,Yanxia Zhang,Qian Yu,Hong Chen
The development of effective antibacterial surfaces to prevent the attachment of pathogenic bacteria and subsequent bacterial colonization and biofilm formation is critically important for medical devices and public hygiene products. In the work reported herein, a smart antibacterial hybrid film based on tannic acid/Fe3+ ion (TA/Fe) complex and poly(N-isopropylacrylamide) (PNIPAAm) is deposited on diverse substrates. This surface is shown to have bacteria-killing and bacteria-releasing properties based on, respectively, near-infrared photothermal activation and subsequent cooling. The TA/Fe complex has three roles in this system: (i) as a universal adhesive “anchor” for surface modification, (ii) as a high-efficiency photothermal agent for ablation of attached bacteria (including multidrug resistant bacteria), and (iii) as a robust linker for immobilization of NH2-terminated PNIPAAm via either Michael addition or Schiff base formation. Moreover, because of the thermoresponsive properties of the immobilized PNIPAAm, almost all of the killed bacteria and other debris can be removed from the surface simply by lowering the temperature. It is shown that this hybrid film can maintain good antibacterial performance after being used for multiple “kill-and-release” cycles and can be applied to various substrates regardless of surface chemistry or topography, thus providing a broadly applicable, simple, and reliable solution to the problems associated with surface-attached bacteria in various healthcare applications.
研究领域:
材料科学
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生物医学工程
·
抗菌表面技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Jing Chen,Yunjing Gao,Qin Ma,Xiaoyan Hu,Yali Xu,Xiaoquan Lu
In the present work, the classical synthesis method of 5,10,15,20-(4-sulphonatophenyl) porphyrin (TPPS 4 ) was improved. The synthesis process became more environmentally friendly, and the yield was increased by 10%. We constructed a sensitive fluorescent sensor for detection hydrogen peroxide (H 2 O 2 ) and glucose (C 6 H 12 O 6 ) by using the hyperfluorescence of TPPS 4 . The TPPS 4 -Fe 3+ complex system of the sensor could generate electron transfer process (ET) in the process of hydrogen peroxide (H 2 O 2 ) and glucose oxidation, which quenched the TPPS 4 fluorescence. The system had a linear range of 0–42 μM for hydrogen peroxide, and the minimum detectable limit (LOD) was 1.24 nM (S/N = 3). Compared with other detection methods, the proposed method had the advantages of higher sensitivity, lower detection limit and more simple operation.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 11
·1832
·
IF 3.164
Weili Peng,Zeping Zhang,Minzhi Rong,Mingqiu Zhang
A kind of core-shell hybrid nanoparticle comprised of a hollow mesoporous silica nanoparticles (HMS) core and a copolymer shell bearing N-(3,4-dihydroxyphenethyl) methacrylamide (DMA) and N-isopropylacrylamide (NIPAM) as responsive moieties was prepared. Moreover, the factors that could impact the surface morphology and hierarchical porous structure were discussed. In the presence of Fe3+, catechol-Fe3+complexes were formed to achieve pH-responsive polymer shell, combining with thermal-sensitiveness of poly(N-isopropylacrylamide). Doxorubicin (DOX) was applied as a model drug and the behaviors of its loading/release behaviors were investigated to prove the idea. The results exhibited a significant drug loading capacity of 8.6% and embed efficiency of 94.6% under 1 mg ml–1DOX/PBS solution. In fact, the loading capacity of drug can be easily improved to as high as 28.0% by increasing the DOX concentration. The vitro cytotoxicity assay also indicated that the as-prepared nanoparticles have no significant cytotoxicity on RAW 264.7 cells. The in vitro experiment showed that the cumulative release of DOX was obviously dependent on the temperature and pH values. This pH/temperature-sensitive hollow mesoporous silica nanosphere is expected to have potential applications in controlled drug release.Keywords:hollow mesoporous silica microspheres;thermo-responsive;pH-responsive;catechol-Fe3+;controlled release
研究领域:
材料科学
·
生物医学工程
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xing Lai,Weiye Xu,Yukui Gou,Hongxiang Zhang,Jianying Huang,Weilong Cai,Yuekun Lai
Phytate (PhA) holds considerable promise for constructing molecular sieve membranes due to its high density of long-range electrostatic attractions, customizable charge density, and excellent polymer affinity. Herein, PhA-Fe 3+ complexes constructed by controllable coordination assembly are presented, based on metal-organophosphorus biphasic interfacial coordination reactions, and use the PhA-Fe 3+ complexes to regulate the interfacial polymerization (IP) process to generate polyamide (PA) nanofiltration membranes. The PhA-Fe 3+ complexes impart a high density of long-range electrostatic and short-range hydrogen bonding forces to the amine monomers and provide tunable charge densities through flexible metal-organophosphate coordination. Hydrogen bonding and strong electrostatic interactions spatially enrich the amine monomers and temporally slow down their diffusion into the hexane phase, as demonstrated by molecular simulations, resulting in a PA/PhA-Fe 3+ membrane with increased surface area, enhanced microporosity, lower thickness, higher water density near pores, and nanoscale spotted structures. Those structures are recognized as the key factor in achieving a water permeance of 19.2 L m −2 h −1 bar −1 , alongside a MgCl 2 rejection of 96.7% and a Li + /Mg 2+ selectivity of 24.1 (Mg 2+ /Li + mass ratio = 20), surpassing those of reported nanofiltration membranes. This PhA-Fe 3+ complexes-modulated IP strategy offers fresh perspectives for constructing a highly permeable membrane for lithium extraction from salt lake brines. Graphical Here, PhA-Fe 3+ complexes are synthesized through metal-organophosphorus biphasic interfacial coordination to modulate interfacial polymerization, yielding polyamide nanofiltration membranes. Molecular simulations confirm that hydrogen bonding and electrostatic interactions spatially confine amine monomers while retarding their diffusion into hexane, endowing such ultrathin PA/PhA-Fe 3+ membrane with enhanced microporosity, enlarged surface area, nanoscale spotted morphology, and optimized hydration layer density at the pore interfaces. The optimized membrane exhibits high permeability and stable Li + /Mg 2+ selectivity.
研究领域:
膜科学
·
材料工程
·
电化学
·
化学分离
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2024
·
IF 9.4
Yue Wang,Ziyi Pan,Jing Cui,Xu Zhang,Daowei Li,Hongchen Sun,Bai Yang,Yunfeng Li
ABSTRACT Oral ulcers can significantly reduce the life quality of patients and even lead to malignant transformations. Local treatments using topical agents are often ineffective because of the wet and dynamic environment of the oral cavity. Current clinical treatments for oral ulcers, such as corticosteroids, have limitations and side effects for long-term usage. Here, we develop adhesive hydrogel patches (AHPs) that effectively promote the healing of oral ulcers in a rat model. The AHPs are comprised of the quaternary ammonium salt of chitosan, aldehyde-functionalized hyaluronic acid, and a tridentate complex of protocatechualdehyde and Fe 3+ (PF). The AHPs exhibit tunable mechanical properties, self-healing ability, and wet adhesion on the oral mucosa. Through controlling the formula of the AHPs, PF released from the AHPs in a temporal manner. We further show that the AHPs have good biocompatibility and the capability to heal oral ulcers rapidly. Both in vitro and in vivo experiments indicate that the PF released from AHPs facilitated ulcer healing by suppressing inflammation, promoting macrophage polarization, enhancing cell proliferation, and inducing epithelial-mesenchymal transition involving inflammation, proliferation, and maturation stages. This study provides insights into the healing of oral ulcers and presents an effective therapeutic biomaterial for the treatment of oral ulcers. Statement of significance By addressing the challenges associated with current clinical treatments for oral ulcers, the development of adhesive hydrogel patches (AHPs) presents an effective approach. These AHPs possess unique properties, such as tunable mechanical characteristics, self-healing ability, and strong adhesion to the mucosa. Through controlled release of protocatechualdehyde-Fe 3+ complex, the AHPs facilitate the healing process by suppressing inflammation, promoting cell proliferation, and inducing epithelial-mesenchymal transition. The study not only provides valuable insights into the healing mechanisms of oral ulcers but also introduces a promising therapeutic biomaterial. This work holds significant scientific interest and demonstrates the potential to greatly improve the treatment outcomes and quality of life for individuals suffering from oral ulcers.
研究领域:
生物医学工程
·
药学
·
组织工程
·
伤口愈合
✓ 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）