JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2012
·
IF 3.07
Shengliu Wang,Kai Yue,Lianying Liu,Wantai Yang
When dispersion polymerization of styrene (St) had run for 3 h, after particle rapidly growing stage, 4,4′-dimethacryloyloxybenzophenone (DMABP) cross-linker was added to reaction system and photoreactive, core(PSt)–shell(Poly(St- co -DMABP)) particles with rich benzophenone (BP) groups on surface were prepared. Polymerization of DMABP could occurred mainly on the preformed core of PSt because its diffusion could be impeded by (1) compactness of particles formed at the moment of cross-linker addition (more than 80% of monomer had been consumed, particles were no longer fully swollen by monomer), (2) reduced polarity of continuous phase, and (3) immediate occurrence of cross-linking. Subsequently, photoreactive, cross-linked hollow particles were yielded by removal of uncross-linked core in THF. SEM and TEM observation demonstrated the formation of core–shell structure and improvement of shell thickness when DMABP content increased. UV–vis spectra analysis on polymer dissolved in THF indicated that there is no polymer of DMABP in core. FTIR spectra analysis and XPS measurement further revealed that BP component on particle surface was enriched when amount of DMABP increased. Finally, an anti-fouling polymer (poly (ethylene glycol), PEG) and protein of mouse IgG was immobilized on particle surface under UV irradiation, as confirmed by FTIR spectra analysis, SEM observation and TMB color reaction.
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
PubMed
高影响因子
BIOFOULING
·
2024
·
IF 2.6
Honghe Song,Yuheng Jiang,Caixiang Chen,Shumei Wen,Zhenzhen Zhou,Chenghu Yan,Wei Cong
To improve the durability of the photobioreactor antibiofouling surface for microalgal cultivation, a series of photoreactive poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA) were successfully synthesized and used to modify ethylene-vinyl acetate (EVA) films by a surface coating and UV light grafting method. Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy analysis (XPS) and fluorescence microscopy results indicated that PTFEMA were fixed successfully onto the EVA film surface through a covalent bond. During the microalgal adhesion assay, the number of EVA-PTFEMA film-adhered microalgae was 41.4% lower than that of the EVA film. Moreover, the number of microalgae attached to the EVA-PTFEMA film decreased by 61.7% after cleaning, while that of EVA film decreased by only 49.1%. It was found that the contact angle of EVA-PTFEMA film surface increased, and remained stable when immersed in acid and alkali solution for up to 90 days.HIGHLIGHTSDurable photobioreactor antibiofouling surfaces for microalgal cultivation were prepared successfully.The contact angle of antibiofouling coating surface remained stable in acid and base environment for 90 days.The attached microalgae on antibiofouling surface decreased 41.4% than those of unmodified surface.The attached microalgae on antibiofouling surface could be cleaned by 61.7% through changing the flow velocity of microalgal suspension.
研究领域:
生物技术
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-11
·
IF 11.878
Hong Yi,Zhou Feifei,Hua Yujie,Zhang Xianzhu,Ni Chengyao,Pan Dihao,Zhang Yiqing,Jiang Deming,Yang Long,Lin Qiuning,Zou Yiwei,Yu Dongsheng,Arnot David E.,Zou Xiaohui,Zhu Linyong,Zhang Shufang,Ouyang Hongwei
Uncontrollable bleeding is a major problem in surgical procedures and after major trauma. Existing hemostatic agents poorly control hemorrhaging from traumatic arterial and cardiac wounds because of their weak adhesion to wet and mobile tissues. Here we design a photo-reactive adhesive that mimics the extracellular matrix (ECM) composition. This biomacromolecule-based matrix hydrogel can undergo rapid gelling and fixation to adhere and seal bleeding arteries and cardiac walls after UV light irradiation. These repairs can withstand up to 290 mm Hg blood pressure, significantly higher than blood pressures in most clinical settings (systolic BP 60–160 mm Hg). Most importantly, the hydrogel can stop high-pressure bleeding from pig carotid arteries with 4~ 5 mm-long incision wounds and from pig hearts with 6 mm diameter cardiac penetration holes. Treated pigs survived after hemostatic treatments with this hydrogel, which is well-tolerated and appears to offer significant clinical advantage as a traumatic wound sealant.
研究领域:
生物材料
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组织工程
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止血
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外科技术
✓ 已验证
DOI
PubMed
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Daofen Huang,Ling Ding,Xinran Qiu,Bin Zhang,Xujun Liang,Xuetao Guo,Haoran Dong
Microplastics (MPs)-derived dissolved organic matter (MPs-DOM) is emerging as a significant contributor to environmental DOM pools. However, the molecular-scale processes governing its interactions with mineral and their effects on photoreactivity remain poorly understood. This study elucidates the structure-dependent molecular transformations and photochemical reactivity of DOM during its interaction with goethite, revealing distinct mechanisms driving reactive oxygen species (ROS) dynamics. Hydroxyl radical (•OH) production universally declined as goethite adsorbed electron-donating groups. Singlet oxygen ( 1 O 2 ) remained stable due to the presence of persistent aromatic photosensitizers. Triplet-excited DOM ( 3 DOM*) exhibited divergent trends: humic acid (HA) and polybutylene adipate terephthalate (PBAT)-DOM showed decreases due to aromatic core adsorption, while fulvic acid (FA) and polystyrene (PS)-DOM exhibited increases driven by humification-stabilized quinoid systems and sulfonation-enhanced conjugation, respectively. The aliphatic inertia of polyethylene (PE)-DOM minimized ROS fluctuations. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) indicated that HA retained lignin-like components and stable sulfur/nitrogen heterocycles, while FA preserved branched quinones. PS-DOM underwent sulfonation, generating benzene sulfonates that enhanced 1 O 2 formation, whereas PBAT-DOM hydrolyzed to nitrogenous metabolites that suppressed •OH production. PE-DOM remained structurally resistant, consistent with its hydrophobic aliphatic chains. These findings emphasize that goethite’s selective adsorption enriches redox-active aromatics in natural DOM but promotes the persistence of MPs-DOM through sulfurization and nitrogenization.
研究领域:
环境化学
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有机地球化学
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光生物学
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土壤科学
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水污染
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材料科学
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质谱学
✓ 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）