JOURNAL OF MEMBRANE SCIENCE
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2019
·
IF 7.015
Haifeng Ji,Hao Xu,Lunqiang Jin,Xin Song,Chao He,Xiaoling Liu,Lian Xiong,Weifeng Zhao,Changsheng Zhao
Although many methods have been investigated to enhance the anti-fouling and hemocompatility of polymeric membranes , developing simplified and high-efficiency strategies to synthesize low-fouling and hemocompatible membranes for safe blood purification remains a huge challenge. Herein, we proposed a facile and straightforward approach to solve the aforementioned problems. Firstly, poly (glycidyl methacrylate) (PGMA) was incorporated into polyethersulfone (PES) membranes via a combination of an in-situ crosslinking polymerization and the phase inversion method. Then, poly (acrylic acid- co -2-acrylanmido-2- methylpropanesulfonic acid) (PAA-AMPS) was covalently coated onto the PES membrane surfaces via an in-situ ring-opening reaction between the PAA and PGMA by simply immersing the membranes into the PAA-AMPS solution. Compared to pristine PES membrane, the protein adsorption amount of the modified membranes reduced; the flux recovery ratio and the resistance to blood cell and bacteria adhesion significantly increased. In addition, the hemocompatibility of the modified membranes was significantly improved, as indicated by the prolongation of the activated partial thromboplastin time and thrombin time of PES-based membranes by 157% and 584% respectively. The proposed simple and high-efficient strategy in this study might be a powerful tool to fabricate polymeric membranes with various and desired functions.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Journal of Bioresources and Bioproducts
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2020
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IF 0
Guodong Feng,Yan Ma,Meng Zhang,Puyou Jia,Chengguo Liu,Yonghong Zhou
Waste cooking oil was modified to prepare bio-base plasticizers (a, b and c) with terephthalic acid, adipic acid and benzoic acid by transesterification, epoxidation and ring opening reactions, respectively. The polyvinyl chloride (PVC) films (a/PVC, b/PVC and c/PVC) were prepared using a, b and c as bio-base plasticizers. The epoxidation and ring opening reactions were mainly investigated through GC-MS analysis. The structures of bio-base plasticizers (a, b and c) were confirmed by Fourier transform infrared spectroscopy (FT-IR), 1 H NMR and 13 C NMR. The mechanical properties of a/PVC were as good as those of PVC films with the dioctyl phthalate (DOP) plasticizer. Meanwhile, the elongation at break of c/PVC reached 422%. The glass transition temperature ( T g ) from dynamic mechanical analysis (DMA) was reduced to 30.6˚C, 45.3˚C, 23.6˚C and 40.6˚C, respectively when 40 phr of a, b, c and DOP plasticizer were added. Results of thermogravimetric analysis (TGA) illustrated that the thermal degradation stabilitiy of a/PVC films was better than those of c/PVC and DOP/PVC. The volatility losses of a, b and c were lower than that of the DOP. Bio-base plasticizers a and c exhibited excellent migration resistance in different solutions (distilled water, 50% ethanol (w/w)). The FT-IR of PVC films showed that the downfield shifts of the —CH—Cl groups of the PVC plasticized with a and c were greater than that of b/PVC. The bio-base plasticizers b had a better plasticizing effect at low temperature.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Yingying Li,Jie Zhang,Zengqiang Liang,Ran Yang,Lingbo Qu,Zhaohui Li,Yuanqiang Sun
It is of great significance for real-time monitoring of phosgene to protect public safety. In this paper, a new rhodamine derivate with highly rapid, special and sensitive response towards phosgene was synthesized and used as a phosgene probe based on its spirolactam ring-opening property and nucleophilic reaction with phosgene. To realize in situ visualization of phosgene, a fluorescent detection pen with gas-liquid reaction model was proposed for the first time using the mixture of the probe and polystyrene as ink. The detection film could be formed in situ by simply writing on desired surface and respond toward phosgene gas within 30 s with an ultra-low detection limit (2 ppm) with the naked eye. Such a fluorescence pen detection mode supplied a new strategy for the fabrication of an excellent platform for real-time detection of phosgene and other gas analytes.
研究领域:
化学
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环境科学
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DOI
高影响因子
MOLECULES
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2023
·Vol. 28
·期 12
·4731
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IF 4.6
Ailing Li,Fuping Dong,Yuzhu Xiong
Nitrogen-rich porous organic polymers were fabricated through a nonreversible ring-opening reaction from polyamines and polyepoxides (PAEs). The epoxide groups reacted with both primary and secondary amines provided by the polyamines at different epoxide/amine ratios with polyethylene glycol as the solvent to form the porous materials. Fourier-transform infrared spectroscopy confirmed the occurrence of ring opening between the polyamines and polyepoxides. The porous structure of the materials was confirmed through N2adsorption–desorption data and scanning electron microscopy images. The polymers were found to possess both crystalline and noncrystalline structures, as evidenced by X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM) results. The HR-TEM images revealed a thin, sheet-like layered structure with ordered orientations, and the lattice fringe spacing measured from these images was consistent with the interlayer of the PAEs. Additionally, the selected area electron diffraction pattern indicated that the PAEs contained a hexagonal crystal structure. The Pd catalyst was fabricated in situ onto the PAEs support by the NaBH₄ reduction of the Au precursor, and the size of the nano-Pd was about 6.9 nm. The high nitrogen content of the polymer backbone combined with Pd noble nanometals resulted in excellent catalytic performance in the reduction of 4-nitrophenol to 4-aminophenol.Keywords:porous organic polymer;amine–epoxy;ring opening;catalyst carrier
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Zhendong Liu,Tengfei Sun,Gongrang Li,Hai Xu,Jianren Lv
This study focuses on the preparation and characterization of high glass transition temperature shape memory polymers (HTSMP) for leak plugging applications. The HTSMP was synthesized through a curing reaction and characterized using FTIR spectroscopy, which confirmed the occurrence of a ring-opening reaction resulting in the formation of hydroxyl groups. The glass transition temperature of HTSMP reached up to 136°C, and it maintained a modulus of over 10 MPa at 200°C. Shape memory performance tests showed that HTSMP samples exhibited a recovery rate ranging from 80% to 95%, with a higher recovery rate observed with increased curing agent content. In sealing performance tests, the addition of HTSMP-1 significantly improved the plugging effect of conventional plugging agents, with a pressure-bearing capacity of up to 9.28 MPa at elevated temperatures. These results demonstrate the potential of HTSMP in sealing applications, particularly for addressing fractured leakage in high-temperature deep wells.
研究领域:
材料科学
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石油工程
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DOI
高影响因子
MACROMOLECULAR RESEARCH
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2019
·Vol. 27
·期 11
·1144-1154
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IF 1.758
Zhou Jinsheng,Lin Yanming,Ye Lin,Wang Ling,Zhou Li,Hu Huiyuan,Zhang Qilong,Yang Hui,Luo Zhongkuan
To solve the biofouling problem of polyvinyl alcohol (PVA) hydrogel as the artificial cornea, glycidyl methacrylate (GMA) and 2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) were grafted on the surface of PVA hydrogel via a new method of photoinduced electron transfer—reversible addition fragmentation chain transfer (PET-RAFT) polymerization and ring-open reaction. Both attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscope (SEM), and thermogravimetric analysis (TGA) confirmed that GMA and HACC were successfully grafted on the surface of PVA hydrogel. A series of experiments to test the hydrophilicity of PVA hydrogel showed that it became hydrophobic due to the introduction of hydrophobic groups after grafting with GMA and HACC. In addition, cytotoxicity in vitro of PVA-g-p(GMA-HACC) hydrogel could be considered as not cytotoxicity according to ISO 10993-5: 2009. The anti-fouling property of hydrogel decreased after grafting with GMA due to the hydrophobic surface, while increased after grafting with HACC due to the steric repulsion of p(GMA-HACC) polymer brush. It’s no doubt that PET-RAFT was a feasible and reliable surface modification method which could be used in many biomolecules due to the excellent advantages.
研究领域:
生物材料学
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表面化学
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医学工程
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产品关联
DOI
高影响因子
JOURNAL OF HETEROCYCLIC CHEMISTRY
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2014
·Vol. 52
·期 1
·284-295
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IF 0.873
F. Zhang,H. Chang,W. Wei
A facile and efficient KOH-oriented regioselective ring-opening reaction for the acetolysis of N -tosylaziridines in DMSO was developed under mild conditions. This operationally simple protocol could tolerate a variety of functionalized carboxylic acids as well as several N -tosylaziridines. Moreover, this strategy provided the corresponding ring-opening products with good results.
研究领域:
有机化学
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合成化学
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DOI
高影响因子
CHEMOSPHERE
·
2024
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IF 8.1
Yulu Jia,Chengyang Zhang,Hongcen Zheng,Guoyang Zhang,Shujuan Zhang
Indirect photodegradation is an important pathway for the reduction of steroid estrogens in sunlit surface waters. Nevertheless, the kinetics and mechanisms governing the interaction between coexisting carbonyl compounds and estrogens under visible light (Vis) remain unexplored. This study systematically investigates the Vis-induced photodegradation of 17 β -estradiol (E2) in the presence of five specific carbonyl compounds—biacetyl (BD), acetone, glyoxal, pyruvic acid, and benzoquinone . The results demonstrate that, among these compounds, only BD significantly enhanced the photodegradation of E2 under Vis irradiation (λ > 400 nm). The pseudo-first order photodegradation rate constants ( k 1 ) of E2 in the Vis/BD system were 0.025 min −1 and 0.076 min −1 in ultrapure water and river water, respectively. The enhancing effect of BD was found to be pH-dependent, increasing the pH from 3.0 to 11.0 resulted in a 76% reduction in the k 1 value of E2 in the Vis/BD system. Furthermore, the presence of humic acid , NO 3 − , or HCO 3 − led to an increase of more than 35% in the k 1 value of E2, while NO 2 − exerted a pronounced inhibitory effect, resulting in a 92% decrease. Peroxyacetyl and peroxymethyl radicals, derived from BD in a yield ratio of 9, played a crucial role in the degradation of E2. These peroxyl radicals primarily targeted electron-rich hydroxyl sites of E2, initiating hydroxylation and ring-opening reactions that culminated in the formation of acidic byproducts. Notably, toxicity evaluation indicates that these hydroxylated and acidic products exhibited lower toxicity than the parent compound E2. This study highlights the important role of peroxyl radicals in estrogen degradation within aquatic environment, and also helps to design efficient visible light-responsive photo-activators for the treatment of estrogen-contaminated waters.
研究领域:
环境科学
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化学
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水处理
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毒理学
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产品关联
DOI
PubMed
高影响因子
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