CARBOHYDRATE POLYMERS
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2021
·
IF 9.381
Fengxian Ji,Xiutian Guo,Aoyu Liu,Peilong Xu,Yeqing Tan,Rui Wang,Longyun Hao
In this research, the polypyrrole/silver (PPy/Ag) composite was first in-situ prepared on alginate fabrics by chemical oxidative polymerization of pyrrole (Py) monomer using silver nitrate as oxidant and sodium dodecyl sulfate (SDS) as the dopant. The effects of mole ratio of Py to silver nitrate, reaction time and dopant concentration on the preparation of PPy/Ag composite were optimized. It was found the optimal molar ratio of Py to silver nitrate was 1:1.5 with 0.02 M SDS under the reaction time of 10 h. Then, the microstructure and properties of resultant PPy/Ag composite were analyzed by scanning electron microscope (SEM), Fourier infrared spectrometer (FT-IR), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and the thermogravimetry analysis (TGA), respectively. Finally, the influences of PPy/Ag coating on the performance of alginate fabrics including electrical conductivity , hydrophilicity , antistatic property and anti-ultraviolet capability were determined. It was found that the electrical conductivity of alginate fabric could be intensively increased after PPy/Ag coating. Meantime, the anti-ultraviolet capability and hydrophobicity could be largely improved by PPy/Ag coating especially under high Py dosage. This paper introduced a simple method for preparing PPy/Ag composite direct on alginate fabric to make it a good functional substrate which could be applied in many fields.
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BIOORGANIC CHEMISTRY
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2021
·
IF 5.275
Yingying Zhang,Yanliang Zhao,Bo Song,Kunming Liu,Jiamin Gu,Yiying Yue,Ranhua Xiong,Chaobo Huang
Fluorescence probe combines with fluorescence imaging technology has become the most powerful analytical method with their great advantages of high sensitivity and selectivity and real-time monitoring. Ni 2+ is widely distributed in food, environment and living animals, thereof, it is of great significance for detection Ni 2+ with high selectivity. Herein, a simple strategy is proposed to design and synthesiz a small molecule fluorescent probe Y1 by using “one-pot” method. The spectroscopic behaviors including UV–Vis absorption and fluorescence emission spectrum have been used to verify the feasibility of probe towards Ni 2+ in water/EtOH ( v / v = 2:8) mixtures under neutral condition. As expected, Y1 offers high selectivity and sensitivity for detection Ni 2+ in aqueous solution with a good linear relationship and low detection limit within Ni 2+ concentration variation from 0 to 13 μM ( DOL = 0.0038 μM, R 2 = 0.9983). It is remarkable that Y1 can be applied for real-time visualization Ni 2+ change in sprouted potato and zebrafish with great photo-stability, highlighting that the practicability and feasibility of Y1 to detect and monitor Ni 2+ in the field of food industry and biomedical field.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Ye Liu,Jinjian Huang,Ziyan Xu,Sicheng Li,Yungang Jiang,Gui wen Qu,Zongan Li,Yun Zhao,Xiuwen Wu,Jianan Ren
Gelatin-based inks have a broad range of applications in bioprinting for tissue engineering and regenerative medicine due to their biocompatibility, ease of modification, degradability, and rapid gelation induced by low temperature. However, gelatin-derived inks prepared through low-temperature treatment have poor mechanical properties that limit their applications. To solve this problem, we designed polyacrylamide/gelatin/silver nanoparticle (PAAm-GelatinAgNPs) ink to improve gelatin-based hydrogels. The ink is based on double networks, in which the physically cross-linked gelatin as the first network and covalently cross-linked PAAm as the second network. It was found that the presence of PAAm increased the tensile and compression strength of the gelatin-based ink. Moreover, silver nanoparticles endowed the antibacterial properties to the gelatin-based ink and were able to shield the UV irradiation and damages to rat skin. In addition, this ink showed the shear thinning property; Consequently it succeeded in printing complex 3D scaffolds such as the cube, five-pointed star, flower, and university logo of “SEU”. In summary, this ink presents a new strategy for the modification of gelatin and offers new potential applications for customized therapy of antimicrobial and anti-UV damage to tissues.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 17
·2100149
·
IF 2.527
Miao Yao,Pingping Zhang,Jun Nie,Yong He
A series of fluorine-containing UV-curable prepolymers is synthesized to prepare fluorine-containing lotus-like biomimetic films through UV nanoimprint lithography technique. Because of the combination of low-surface energy fluorine element and micro-nano biomimetic structure, the UV-cured films exhibit excellent superhydrophobicity and the maximum water contact angle of 172° is obtained. The prepared biomimetic superhydrophobic film is still robust even under dynamic condition; during the water dropping test, the water droplet can bounce ≈10 mm from the surface after dropping from a height of 25 mm. In addition, due to the excellent superhydrophobicity and superoleophilicity, the oil can spread rapidly after dropping on the obtained superhydrophobic surface and then highly efficient high oil–water separation ability can be achieved, which provides for high potential application on oil–water separation membranes. Furthermore, the biomimetic superhydrophobic films also show obvious anti-bioadhesion, the adhered cell number on fluorine-containing biomimetic surface is just ≈9% (the minimum value) of that on non-fluorine non-biomimetic surface.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Mengjie Zhang,Wenjing Ma,Jiaxin Cui,Shutian Wu,Jingquan Han,Yan Zou,Chaobo Huang
As oily wastewater issues continue to grow, the treatment of oily wastewater has become urgent an emergency. However, present solutions are restricted by the limited performance of materials. An UV-resist and transparent coating consisting of PDMS and ZnO decorated on a highly stable and self-standing polyimide is reported in this work as a potential solution. The obtained fibrous membranes not only allow high-efficiency (higher than 99%) oily wastewater separation but also show superior UV-resistant activity. Moreover, the superoleophilicity and hydrophobicity of the composite membrane were confirmed to be stable under harsh conditions, and the transparent coating layer has the potential to be applied in other fields. The design of the UV-resistant, transparent and superoleophilic nanofibrous membrane is very practical, and will be quite promising for reducing oily environmental contaminations from waters.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Huaying Liu,Biaojun Zhang,Yingjie Li,Qi Fang,Zhichao Hou,Senlin Tian,Junjie Gu
Degradation of sulfapyridine as a representative sulfonamide by the UV/chlorine process was investigated. Kinetic experiments revealed that aniline and sulfonamide moieties were sulfapyridine’s main reaction sites with •OH, and the aniline moiety was the preferable site for Cl• attack. Effects of four influence factors (pH; humic acid, HA; HCO3–; Cl–) on the degradation kinetics were explored by response surface methodology, and it was found that pH and HA have the highest level influence (81%) among all influence variables (linear, quadratic, and interactive terms), and low pH and concentrations of HA were beneficial for degradation. Approximately 70% of sulfapyridine degradation was observed within 60 min in the UV/chlorine system (pH = 5) without HA. A kinetic model considering steady-state concentrations of reactive radicals and their second-order rate constants is suitable for predicting sulfapyridine degradation, elucidating that •OH and Cl• are major radicals for sulfapyridine degradation in freshwater, and •OH and Cl2•– are responsible for the degradation in coastal seawater.
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Frontiers of Environmental Science & Engineering
·
2019
·Vol. 13
·期 5
·1-11
·
IF 3.883
Hao Xuemin,Wang Guanlong,Chen Shuo,Yu Hongtao,Quan Xie
In this work, a UV-light assisted peroxymonosulfate (PMS) activation system was constructed with the composite catalyst of multi-walled carbon nanotubes (CNT) — titanium dioxide (TiO 2 ). Under the UV light irradiation, the photoinduced electrons generated from TiO 2 could be continuously transferred to CNT for the activation of PMS to improve the catalytic performance of organic pollutant degradation. Meanwhile, the separation of photoinduced electron-hole pairs could enhance the photocatalysis efficiency. The electron spin resonance spectroscopy (EPR) and quenching experiments confirmed the generation of sulfate radical (SO 4 • − ), hydroxyl radical (•OH) and singlet oxygen ( 1 O 2 ) in the UV/PMS/20%CNT-TiO 2 system. Almost 100% phenol degradation was observed within 20 min UV-light irradiation. The kinetic reaction rate constant of the UV/PMS/20%CNT-TiO 2 system (0.18 min −1 ) was 23.7 times higher than that of the PMS/Co 3 O 4 system (0.0076 min −1 ). This higher catalytic performance was ascribed to the introduction of photoinduced electrons, which could enhance the activation of PMS by the transfer of electrons in the UV/PMS/CNT-TiO 2 system.
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CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Kunlin Chen,Changyue Xu,Jianlin Zhou,Ruoyi Zhao,Qiang Gao,Chaoxia Wang
The synthesis of multifunctional microcapsules using natural polymers has contributed to a broad range of practical applications on fabric coatings. This paper presents a facile and environment-friendly approach for waterborne multifunctional fabric coatings by using cellulose/silica hybrid microcapsules. In this method, lavender fragrance oil-loaded cellulose/silica hybrid microcapsules were one-step synthesized via emulsion solvent diffusion. This microcapsule is core-shell structure with UV absorbers and methacrylic acid grafted silica in the shell and then added into the waterborne polysiloxane resins to form multifunctional fabric coatings. The as-obtained fabric coatings not only exhibited controlled lavender fragrance oil-releasing performance, and it can keep above 30 % fragrance after ninety days due to the slow releasing of lavender fragrance oil in the capsules, but also showed excellent UV resistant property with 159 UPF value.
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Analytical Methods
·
2019
·Vol. 12
·期 2
·141-148
·
IF 2.378
Xue Ren,Man He,Beibei Chen,Bin Hu
Herein, magnetic porous organic polymers (MOPs) prepared via an azo coupling reaction in water under mild conditions are evaluated for the extraction of seven cardiovascular drugs, including xylocaine, metoprolol, mexiletine, labetalol, propranolol, carvedilol and propafenone, from human urine samples for the first time. The extraction mechanisms are assumed to be electrostatic interaction and π–π stacking. The MOPs exhibited fast adsorption/desorption time (13 min) and high enrichment factors (315–365-fold) for target analytes. Based on this, a method coupling magnetic solid phase extraction with HPLC-UV detection was developed for the analysis of cardiovascular drugs. Under the optimized conditions, the LODs (S/N = 3) were in the range of 0.06–0.57 μg L−1 with an RSD (n = 5) of 4.3–8.6%, and the linear range was 0.2–200 μg L−1 for propranolol, 2–200 μg L−1 for metoprolol, and 0.5–200 μg L−1 for the other five analytes. The developed method was applied for the analysis of cardiovascular drugs in urine samples with recoveries of 89.0–112%. In order to further evaluate the application potential of this method, real-time monitoring of metoprolol in urine samples collected from volunteers treated with metoprolol tablets was performed. The proposed method is simple, fast, and sensitive and has good potential in the monitoring of cardiovascular drugs in competitive sports and clinical analysis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Ru Zhong,Quan Zhong,Meijun Huo,Binglin Yang,Hong Li
Nano-ZnO (nZnO) has been widely used as antibacterial, UV-shielding and photocatalysis materials, but limited by its contentious biosafety. In this paper, chitosan (CS) was introduced to enhance the biocompatibility. To solve the problem that nZnO reacts with the CS acid solution, alternate-feed spray drying was adopted to fabricate nZnO/CS composite microspheres . It was showed that nZnO remained the hexagonal phase, dispersed and embedded into CS microspheres. Based on the results of cytotoxicity and hemolysis test, biosafety was improved obviously. Further, the antibacterial activity of nZnO/CS was notably better than either of CS and nZnO individually. UV-shielding property and photocatalytic degradation test were estimated. In a word, alternate-feed spray drying presents a novel and cost-efficient method to fabricate multifunctional nZnO/CS microspheres with enhanced biosafety.
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2019
·Vol. 216
·期 6
·1800669
·
IF 1.606
Yinhuan Chu,Hongkun Cai,Like Huang,Zhixue Xing,Yangyang Du,Jian Ni,Juan Li,Jianjun Zhang
A facile and low-temperature solution processed UV/ozone process has been proposed for fabricating TiO 2 layer, making it possible to fabricate planar perovskite solar cells at low temperature. UV/ozone photo-annealing treatment could easily eliminate the organic components, resulting in high quality amorphous TiO 2 films with high transparency, electrical conductivity, and hydrophilicity. In addition, perovskite solar cells with the UV/ozone-treated TiO 2 electron transport layer exhibiting the best power conversion efficiency of 11.58% for rigid substrate and 7.33% for flexible substrate, respectively. The results clearly indicate that UV/ozone photo-annealing treatment is a simple and effective process of fabricating high performance flexible perovskite solar cells.
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PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Bin Liang,Shaojie Kuang,Jiajian Huang,Limin Man,Zhuohong Yang,Teng Yuan
With the rapid development of industry and the growing shortage of fossil energy, tung oil has attracted much attention of researchers because of its environment-friendly and renewable advantages. In this work, we successfully synthesized two kinds of tung-oil-derived renewable UV-curable active monomers, tung-acid-maleic tri-acrylate (TOAH) and tung-maleic tetra-acrylate (TMPG). 1 H NMR and FT-IR results collectively revealed that the targeted active-monomers were successfully prepared. UV-curing kinetics of the films was studied by Photo-DSC, thermal properties of their cured films were investigated by dynamic mechanical analysis, thermogravimetric analysis and general performance of UV-curing films including acidic, alkaline resistance and boiling-water resistance were also investigated. Tensile properties of the cured films were also tested. Dynamic mechanical analysis demonstrated that the storage modulus and glass transition temperatures of the cured films increased while increasing the content of TMPG monomer. The crosslinking density of the cured copolymers also increased with the increasing content of TMPG monomer. TGA showed that the maximum thermal decomposition temperatures ( T max ) of the cured copolymers were all above 420 °C. Tensile tests indicated that the tensile properties were better in the cured systems when the mixed films consisted of 50TOAH/50TMPG and 30% HDDA reactive diluent. Finally, all the results demonstrated that comparable balanced properties could be obtained by mixing these two bio-based monomers together.
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