CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Rui Wang,Xin Song,Tao Xiang,Qiang Liu,Baihai Su,Weifeng Zhao,Changsheng Zhao
A straightforward mussel-inspired approach was proposed to construct chitosan-polyurethane coatings and load Ag nanoparticles (AgNPs) to endow polyethersulfone (PES) membranes with dual-antibacterial and antifouling properties. The macromolecule O -carboxymethyl chitosan (CMC) was directly reacted with catechol in the absence of carbodiimide chemistry to form the coating and load AgNPs via in situ reduction; while lysine (Lys) was used as a representative small molecule for comparison. Then, PEG-based polyurethane (PU) was used for constructing Lys-Ag-PU and CMC-Ag-PU composite coatings, which substantially improved the protein antifouling property of the membranes. Furthermore, the CMC-Ag-PU coating exhibited superior broad-spectrum antibacterial property towards E. coli and S. aureus than Lys-Ag-PU coating. Meanwhile, the CMC-Ag-PU coating showed sustained antifouling property against bacteria and could reload AgNPs to be regenerated as antibacterial and antifouling coating. This approach is believed to have potential to fabricate reusable antifouling and antibacterial coatings on materials surfaces for aquatic industries.
研究领域:
材料科学
·
生物医学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2021
·Vol. 102
·期 9
·3916-3924
·
IF 3.639
Junxin Lin,Yuying Zhang,Yiwei Li,Peizi Sun,Xiang Ren,Dongmei Li
BACKGROUND The quality deterioration of Antarctic krill ( Euphausia superba ) after thermal processing limits its industrial application. This study sought to improve the texture characteristics of Antarctic krill after heat treatment through pre-soaking using l - lysine (Lys) solution and sodium tripolyphosphate (STPP). Moreover, the effects of Lys on heat-treated Antarctic krill were explored. RESULTS Lys significantly reduced the cooking loss and improved the texture characteristics of Antarctic krill during heat treatment. The low-field nuclear magnetic resonance results showed that Lys reduced the water loss of Antarctic krill during heat treatment. Additionally, the surface hydrophobicity, Fourier transform infrared spectroscopy, and endogenous fluorescence spectroscopy results showed that Lys could inhibit the structural damage of Antarctic krill protein under the thermal denaturation condition and enhance the thermal stability of the protein. The scanning electron microscopy results showed that Lys could protect the structural integrity of Antarctic krill muscle fibers during heat treatment. CONCLUSION The cooking loss in the Lys added groups was better than the sodium tripolyphosphate added group, and 2.0% Lys solution could minimize the cooking loss of Antarctic krill. The secondary and tertiary structures of the Antarctic krill protein were actively protected by Lys during heat treatment. Overall, the study will provide insights into the application of Lys in the food industry as a natural additive and an alternative to phosphate. © 2021 Society of Chemical Industry.
研究领域:
食品科学
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生物化学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 33
·期 2
·025501
·
IF 3.874
Ruyan Xie,Nannan Zhang,Yaoyao Qu,Mingyu Tang,Fang Zhang,Fang Chai,Zhongmin Su
Herein, we have reported a facile one-pot strategy to synthesize fluorescent Cu nanclusters (Cu NCs) by using ʟ-histidine as stabilizer, and ascorbic acid as reducing agent. Cu NCs are stable, water-dispersible, and emit bright cyan emission with a quantum yield 26.08%. The Cu NCs can be employed as colorimetric and fluorimetric dual-mode detector, exhibiting excellent selectivity and sensitivity for detecting 2,4-dinitrophenol (DNP) specifically. Notably, Cu NCs were a sensitive sensor, which had speciality to detect DNP in range of linearity from 0.01 to 0.15 mM with a discernable limit as low as 3.96 μM. The mechanism of efficiently selective detection of DNP by Cu NCs was analyzed by UV absorption, fluorescence decay spectrum, and the performance of 'turn off' towards DNP was determined as the inner filter effect and static quenching effect. Further, the environmental tolerance of the Cu NCs probe was estimated by using the different natural water samples, demonstrating its great promise in the field of DNP monitoring and water sample analysis.
研究领域:
分析化学
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环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 4
·045302
·
IF 2.025
Mengting Xiao,Haopeng Cai
A novel phosphorous/silicon hybrid containing active amino was synthesized by bisphenol F epoxy resin modified by 0-(2,5-Dihydroxyphenyl)−10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide (ODOPB) and hyperbranched polysiloxane (APTMS-HPSi). At first, APTMS-HPSi was synthesized by a simple reaction among aminoethylamino propyltrimethoxy silane (APTMS) and tripropylene glycol (TPG). ODOPB was used to modify bisphenol F epoxy resin. Then add different content of APTMS-HPSi to the phosphorus-containing modified epoxy resin (P-EP). Fourier Transform Infrared (FTIR) Spectroscopy was used to characterized the chemical structure of APTMS-HPSi. The effects of APTMS-HPSi content on key properties was systemically investigated. Results showed that the addition of APTMS-HPSi and ODOPB effectively improve the toughness and liquid oxygen compatibility. With the increase content of APTMS-HPSi, char yield and limited oxygen index (LOI) value of the cured resin increased, and the liquid oxygen sensitivity coefficient (IRS) decreased. The elongation at break was increased 45.32% by only 6wt% loading with APTMS-HPSi in epoxy resin, and at the same time the IRS of the modified resin was reduced from 7% to 0%. When the addition amount was 6wt%, the fracture elongation, impact strength and fracture toughness KIC were increased by 52.1%, 81.8% and 54.3% respectively. Therefore, adding phosphorus and hyperbranched polysiloxane to the resin can improve the liquid oxygen compatibility and toughness of the epoxy resin at the same time.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Friction
·
2023
·Vol. 12
·期 2
·291-304
·
IF 6.8
Dai Qingwen,Chen Lei,Pan Jiabao,Shi Liping,Liu Dameng,Huang Wei,Wang Xiaolei
Robust superhydrophobic surfaces with excellent capacities of repelling water and anti-frosting are of importance for many mechanical components. In this work, wear-resistant superhydrophobic surfaces were fabricated by curing a mixture of polyurethane acrylate (PUA) coating and 1H,1H,2H,2H-Perfluorodecyltrichlorosilane (HFTCS) on titanium alloy (TC4) surfaces decorated with micropillars pattern, thus, composite functional surfaces with PUA coating in the valleys around the micropillars pattern of TC4 were achieved. Apparent contact angle on fabricated surfaces could reach 167°. Influences of the geometric parameters of micropillars pattern on the apparent contact angle were investigated, and the corresponding wear-resistant property was compared. Droplet impact and anti-frosting performances on the prepared surfaces were highlighted. An optimized design of surface texture with robust superhydrophobicity, controllable droplet impact, and anti-frosting performances was proposed. This design principle is of promising prospects for fabricating superhydrophobic surfaces in traditional mechanical systems.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Advanced Sensor Research
·
2023
·Vol. 2
·期 5
·2200014
·
IF 0
Yangwei Li,Jing Qian,Yuanyuan Zhang,Ting Zeng,Qijin Wan,Nianjun Yang
In this study, metal–organic framework (MOF) nanoparticles of UiO-66 are integrated with expanded graphite (EG) (UiO-66/EG) by a facile solvothermal approach. The advantages of this nanocomposite UiO-66/EG overcome the poor electronic conductivity and slow diffusion of MOFs for their electrochemical applications. Through electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical techniques, the morphology, surface area, and physicochemical properties of this UiO-66/EG nanocomposite are characterized. The UiO-66/EG nanocomposite exhibits superior sensing performance over the UiO-66 and EG when used for nitrite and L-cysteine determination. This includes less positive oxidation potentials and enhanced oxidation currents. Using the UiO-66/EG nanocomposite, the nitrite oxidation peak current is linear with a concentration range of 0.20 μ m to 13.15 m m with the lowest limit of detection (LOD) of 0.06 μ m ( S / N = 3). Meanwhile, superior performance is demonstrated for L-cysteine monitoring, where the oxidation peak current is linear over the L-cysteine concentration in the range of 0.5–250 μ m and of 0.25–3.50 m m and a LOD of 0.28 μ m ( S / N = 3). This UiO-66/EG/GCE nanocomposite is successfully exploited to detect nitrite in food samples and to measure L-cysteine in juice samples. Therefore, the proposed sensing platform enables the fabrication of high-performance electrochemical sensors to accurately quantify nitrite and L-cysteine in complex matrixes.
研究领域:
分析化学
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材料科学
·
电化学传感器
✓ 已验证
DOI
Small Methods
·
2024
·
IF 10.7
Meng Jiang,Yuxiang Zhu,Zhengtao Jia,Xiang Zhong,Qiufan Sun,Yan Wang,Jianfeng Yao
This work reports boron and oxygen dual-doped carbon nitride nanotubes (B/O-CNNTs) prepared via a copolymerization process for electrocatalytic ammonia synthesis from nitrogen gas (NRR) and nitrate (NO 3 RR) sources, respectively. By adjusting the dosage of boron oxide precursor, the texture and content of B/O dual dopants and the coordination environment in the resulting 1D CNNTs can be tuned. The best B/O-CNNTs can achieve maximum Faradaic efficiencies of 35% and 96% at −1.1 V versus RHE with corresponding ammonia yields of 16.7 and 211.4 µg h −1 mg −1 , respectively. A comparatively higher selectivity is achieved in the NRR process compared to NO 3 RR. The B/O-induced coordinations boost electron transfer rates along the longitudinal axis. The presence of carbon vacancies and the unique 1D nanotubular structure enhance interactions among reactants. Concurrently, the formed frustrated Lewis pairs are pivotal in activating chemisorbed nitrogen gas or nitrate, resulting in notable accelerations of ammonia generation kinetics. In situ UV–vis spectroscopy reveals that the ideal potential of −1.1 V versus RHE facilitates the involvement of free electrons in the reaction, as it aligns with the conduction potential of B/O-CNNTs. This study paves the way for the design of non-metal-based electrocatalysts with dual dopants for sustainable electrocatalysis toward ammonia synthesis.
研究领域:
材料科学
·
电化学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 11
·
IF 1.768
Caideng Yuan,Jingpeng Wang,Mingtong Cui,Yan Peng
Waterborne polyurethane/polyacrylate (PUA) emulsions were prepared by dispersing polyurethane (PU) prepolymer in polyacrylate (PA) emulsion; therefore, the PU particles formed in the presence of PA nanoparticles. The particle size and its distribution of the composite PUA emulsion were determined by dynamic light scattering. The result shows that the average particle size increases initially and then decreases with increasing PA content, which is confirmed by transmission electron microscope characterization. The surface properties of PUA films were analyzed by water contact angle and atomic force microscope topography. It indicates that the water contact angle and the average roughness of the composite PUA films are larger than those of the PU film. Meanwhile, mechanical properties test, scanning electron microscopy, and thermogravimetric analyses disclose that the PUA films are characterized by enhanced tensile strength, rough fractured surface, and good thermal stability. The preparation method proposed in this article is an effective and convenient way to manufacture composite PUA emulsion. The composite PUA emulsion can be potentially used in coatings. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43203.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ning Xia,Liping Zhang,Qingqin Feng,Dehua Deng,Xiaoling Sun,Lin Liu
Dopamine (DA) is an electrochemically active compound. In this work, we reported an electrochemical affinity biosensor for the detection of tyrosinase activity with DA-modified gold nanoparticles (DA-AuNPs) as redox probes. Hydrophilic boronic acids are well known to form tight diol-boronate ester covalent bonds with members of the diol family. In the sensing platform, monophenols of tyrosine residues immobilized onto gold electrode were catalytically oxidized by tyrosinase to o-diphenols. The resultant o-diphenols captured 4-mercaptophenylboronic acid (MBA)-capped AuNPs (MBA-AuNPs) through the formation of tight covalent bonds between o-diphenols and boronic acids of MBA-AuNPs. Electrochemically active DA-AuNPs were then attached by the anchored MBA-AuNPs via the interaction of MBA with DA, which facilities the amplified voltammetric detection. The current increased with the increase of tyrosinase concentration. The well-defined redox waves and high sensitivity resulting from dual-amplification of MBA-AuNPs and DA-AuNPs demonstrated that this method would be valuable for probing the activity of enzymes by generating a diol-containing substrate, and designing new types of electrochemical biosensor for sensitive detection of diol derivatives.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2024
·Vol. 12
·期 8
·2412258
·
IF 14.3
Xiaoyu Zhang,Xixian Yan,Fanglei Zeng,Hao Zhang,Peiyao Li,Haiyang Zhang,Ning Li,Qingbao Guan,Zhengwei You
Flammability is a significant challenge in polymer-based electronics. In this regard, triboelectric nanogenerators (TENGs) have enabled a safe means for harvesting mechanical energy for conversion into electrical energy. However, most existing polymers used for TENGs are sourced from petroleum-based raw materials and are highly flammable, which can further accelerate the spread of fire and harm the ecological environment. In addition, the existing intrinsic flame-retardant TENGs are not elastic at room temperature, which may potentially damage the flexible equipment and harm firefighters. This study presents an intrinsic flame-retardant bio-based elastic phytic acid polyurethane (PUPA) synthesized using a simple and efficient one-pot polycondensation. The cross-linked structure and polar phosphorus-containing segments of PUPA are fabricated into PUPA-TENG, demonstrating a superior elasticity (elongation up to 660%), flame retardancy (UL94 V-0), impact resistance (34.71 MJ m −3 ), and dielectric constant ( D k = 9.57). Consequently, this study provides a simple strategy for tailoring TENGs toward environmentally friendly and secure power generators and electronics, which can effectively reduce fire hazards and potentially be applied to other fire-risk fields such as personal protection, firefighting, and new energy.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 5
·1932-1947
·
IF 3.5
Luo Yinglin,Xing Lida,Hu Chuanshuang,Lin Xiuyi,Zhang Weiwei,Gu Jin
Cuprous oxide (Cu 2 O) nano- and microstructures possess unique properties that may find a variety of applications. Environmentally benign synthesis of Cu 2 O with well-controlled morphology is highly desirable. In this study, Cu 2 O crystals with tunable shapes are synthesized using cellulose nanofibrils (CNFs) as a shape regulator and the sole reducing agent in aqueous environment. By simply increasing Cu 2 O precursor concentration, the Cu 2 O crystals evolved from octahedra to cuboctahedra, and finally cubes, accompanied with increasing size from nano- to microscale. The selection of Cu chelating agent (sodium tartrate or potassium sodium tartrate) affected the crystal growth rate. Transition in the relative intensities of the (111) and the (200) crystalline peaks in their XRD patterns was consistent with the morphology change. During the growth of crystals, CNFs were preferably bound to the {111} crystalline facet. The introduction of KBr to the reaction system produced short hexapods. The resultant CNF-Cu 2 O hybrids were incorporated into waterborne polyurethane (WPU) films. Even with 0.5 wt% CNF-Cu 2 O, the WPU film showed significant enhancement in modulus, strength and elongation at break. This work proves the possibility of controlled growth of Cu 2 O particles aided by CNFs and provides a new strategy for improving the performance of eco-friendly WPU films. Graphical Abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 12
·1-11
·
IF 2.8
Jia Boyang,Sun Weichen,Duan Wenhao,Ma Xiangbo,Wang Yong,Zhou Chengyan,Qin Jianglei
With biocompatibility and biodegradability, self-healing hydrogels prepared from biopolymers show great advantages in bioengineering and bioscience as drug delivery carrier. In this research, the biodegradable hydrogel was constructed based on poly(amino acid) of poly(aspartic acid) (PAsp) and pectin for in vivo antitumor applications as DOX release carrier. The PAsp bearing hydrazide groups and isopropyl groups (PAPH) was synthesized by ring opening of polysuccinimide (PSI) by isopropylamine and hydrazine, and used to fabricate fully biodegradable hydrogel with oxidized pectin (OPec) through dynamic acylhydrazone bond cross-linking. The regulatable mechanical strength of the hydrogel could adapt its bioapplication, and the excellent biocompatibility ensured biosafety in biomedical areas. Furthermore, the pectin backbone and the PAsp endowed the hydrogel with biodegradability both by enzyme and in vivo. The PAPH/Opec hydrogel as DOX carrier inhibited the tumor growth with the tumor weight 80% lower than the control group and reduced the in vivo toxicity of the DOX. As a result, this biodegradable PAPH/Opec hydrogel could find show great potential as sustained drug delivery vehicle in biomedical areas.
研究领域:
生物医学工程
·
材料科学
·
药学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）