PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
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2016
·Vol. 15
·期 11
·1442-1447
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IF 2.235
Xu Ruixin,He Minghui,Yang Jianwen
Benzoylformamides (BFAs) are proposed as photocaged bases for redox free radical photopolymerization (FRP). Initially the dissolving capacity of BFAs was evaluated. Besides our previously reported photo-latent anion polymerization, BFAs, as versatile photocaged bases, can not only initiate the FRP of acrylates unassisted, but also perform redox FRP in combination with a benzoyl peroxide initiator. We detail a model photopolymerization in the presence of BFA-dBA ( N , N -dibenzyl-2-oxo-2-phenylacetamide) as the photocaged base. In combination with a benzoyl peroxide initiator, BFAs are able to initiate the amine-mediated redox photopolymerization of acrylates, and enhance the photopolymerization rate. Finally, we investigated the mechanism of the radical formation to initiate the redox FRP, as exemplified by BFA-dBA.
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Yifan Yun,Ying Guan,Yongjun Zhang
Patterned hydrogel films are attractive for the generation of 3D multicellular spheroids, a new in vitro cell model. Traditional methods for their synthesis, such as photolithography and micromolding, usually require a template and are difficult to fit into commercial cell culture plates. Here a simple method to synthesize patterned poly(2-hydroxyethyl methacrylate) (PHEMA) films were developed. First PHEMA films were synthesized in situ in the wells of cell culture plates by bulk redox polymerization of the monomer. Films with a corrugated surface were usually obtained. Fortunately a narrow range of initiator concentration was identified in which smooth films could be obtained. Then water was added to swell the films and wrinkling patterns were produced spontaneously. The shape and size of the patterns can be controlled by adjusting cross-link density and film thickness. Under optimized conditions, films with regular hexagonal patterns were obtained successfully. The patterned PHEMA films were further used to generate multicellular spheroids. The resulting spheroids exhibit high viability and narrow size distribution.
研究领域:
生物材料学
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细胞生物学
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组织工程
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产品关联
DOI
高影响因子
ELECTROANALYSIS
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2014
·Vol. 26
·期 10
·2207-2215
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IF 2.502
Liping Wu,Yansha Gao,Jingkun Xu,Limin Lu,Tao Nie
A novel redox polymer comprised of poly(3,4-ethylenedioxythiophene) (PEDOT) and ethylenediamine tetraacetic acid-Ni 2+ (EDTA-Ni) complex serving as doping anions has been synthesised by a facile one-step electrochemical approach and utilized as an efficient electrode material for sensitive luteolin detection. The morphology, chemical structure and composition of the redox polymer were analyzed by SEM, UV-vis and FT-IR spectrum. Electrochemical tests revealed that the redox polymer was highly electrochemically reversible and exhibited good electrocatalytic activity to the redox reactions of luteolin with a linear range covering from 1 nM to 10 µM with a low detection limit of 0.3 nM of luteolin.
研究领域:
材料科学
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分析化学
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生物医学工程
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
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2014
·Vol. 55
·期 4
·889-895
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IF 1.441
Liu Zhang,Haicun Yang,Hui Liu,Qingting Ni,Fanghong Gong
Polystyrene-grafted attapulgite (ATP-g-PS) was prepared using surface-initiated redox initiation via graft from approach. ATP was modified with (3- aminopropyl) triethoxysilane (APTES) to anchor amine on the surface (ATP-NH 2 ), and then ATP-NH 2 was further treated with 4-(diethylamino) salicylaldehyde (DEAS) to give aromatic tertiary amine groups functional ATP (ATP-ATA). Subsequently, the surface-initiated redox polymerization of styrene in the presence of ATP-ATA and benzoyl peroxide (BPO) was performed to afford ATP-g-PS . The chemical grafting of PS on the surface of ATP was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis . The crystal structure of PS-grafted ATP was characterized by X-ray diffraction (XRD) analysis. The morphology of ATP-g-PS was observed by scanning electron microscopy (SEM) . POLYM. ENG. SCI., 55:889–895, 2015. © 2014 Society of Plastics Engineers
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Haijun Ji,Hui Yang,Yan Wan,Liwei Li,Jiaqi Wang,Xin Zhang,Jie Yu,Xinxin Zhou,Runguo Wang,Liqun Zhang
In the rubber industry, the substitution of traditional engineering rubbers derived from fossil resources with novel biobased elastomers is considered for sustainable development, which largely relies on a straightforward and environmentally friendly synthesis procedure and the availability of material properties. In the research, semi-biobased elastomers, poly(dibutyl fumarate-co-butadiene)s (PDBFBs), were prepared by redox emulsion polymerization of dibutyl fumarate obtained from fumaric acid esterified with n-butanol and partially petroleum-derived butadiene. The microscopic structures of PDBFBs were verified by FTIR, NMR, and GPC analyses. The Tg values of PDBFBs were in the range of −73 and −58 °C. Additionally, the reactivity ratios of two comonomers in PDBFBs were evaluated by two methods: the Fineman–Ross and Kelen–Tüdös methods. The macroscopic properties of semi-biobased elastomers, such as thermal and mechanical performances, were meticulously regulated via molecular design. To achieve the desired properties, silica was incorporated into the PDBFBs to prepare strong nanocomposites. These nanocomposites displayed adequate tensile strength (14.3–31.6 MPa), adequate elongation at break (338–457%), low rolling resistance, and excellent thermoresistant oxygen aging performance. These results showed that PDBFB nanocomposites possessed quite good properties and had the potential for practical applications. This work provides a facile, efficient, solvent-less green synthesis route to design new-generation promising sustainable engineering elastomers for the rubber industry.
研究领域:
材料科学
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绿色化学
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产品关联
DOI
高影响因子
Polymer Chemistry
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2013
·Vol. 5
·期 8
·2951-2960
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IF 5.231
Minghui He,Guangxue Chen,Xun Huang,Ruixin Xu,Zhaohua Zeng,Jianwen Yang
N-Phthaloyltranexamic acid ammonium salt derivatives integrating with peroxides can invoke redox photopolymerization and propagating polymerization. A series of N-phthaloyltranexamic acid ammonium salt derivatives based on benzophenone, thioxanthen, and naphtha chromophores as novel photocaged bases were synthesized and characterized. In combination with a benzoyl peroxide initiator, these structures were able to initiate the amine-mediated redox photopolymerization of acrylates. In particular, the covalent binding of N-phthalimidoamino acid and type II chromophores (thioxanthone, benzophenone) improved remarkably the photoreactivity of photocaged bases (thioxanthen-DBU and benzophenone-DBU) compared to the parent compound. Furthermore, naphthal-DBU matches well the emission spectra of the mercury lamp with a dominant emission wavelength at 365 nm. More importantly, phthal-DBU & BPO as a new photocaged redox combination can invoke controlled redox polymerization within an irradiation time of 3 min. Finally, due to the persistent interaction of the produced longeval amine with peroxides, remarkable post conversion after irradiation, which is significant for preparation of photo-screened materials, was thus initially achieved in the redox photopolymerization.
研究领域:
材料化学
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高分子科学
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有机化学
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2019
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IF 4.959
Ziyang He,Ruming Jiang,Wei Long,Hongye Huang,Meiying Liu,Junyu Chen,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
Carbon nanotubes (CNTs) are a novel type of one-dimensional carbon nanomaterials that have been widely utilized for biomedical applications such as drug delivery, cancer photothermal treatment owing to their high surface area and unique interaction with cell membranes. However, their biomedical applications are still impeded by some drawbacks, including poor water dispersibility, lack of functional groups and toxicity. Therefore, surface modification of CNTs to overcome these issues should be importance and of great interest. In this work, we reported for the first time that CNTs could be surface modification through the combination of Diels-Alder (D-A) reaction and redox polymerization, this strategy shows the advantages of mild reaction conditions, water tolerance, low temperature and hydroxyl-surfaced initiator. In this modification procedure, the hydroxyl groups were introduced on the surface of CNTs through the D-A reaction that was adopted for grafting the copolymers, which were initiated by the Ce(IV)/HNO 3 redox system using the hydrophilic and biocompatible poly(ethylene glycol) methyl ether methacrylate (PEGMA) and carboxyl-rich acrylic acid (AA) as monomers. The final CNTs-OH-PAA@PEGMA composites were characterized by a series of characterization techniques. The drug loading and release results suggested that anticancer agent cis‑platinum (CDDP) could be loaded on CNTs-OH-PAA@PEGMA composites through coordination with carboxyl groups and drug release behavior could be controlled by pH. More importantly, the cell viability results clearly demonstrated that CNTs-OH-PAA@PEGMA composites displayed low toxicity and the drug could be transported in cells and still maintain their therapeutic effects.
研究领域:
材料科学与工程
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生物医学工程
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纳米医学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
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2024
·
IF 8.9
Yuanyuan Zhang,Kangbao Li,Dong Zhang
Structural supercapacitor (SSC) is a promising structural energy storage device that can be used as a component of buildings to maximize the utilization of building space while realizing energy storage. Currently, a major challenge for SSC is achieving ultrahigh ionic conductivity and energy density simultaneously, especially when the mechanical performance reaches an acceptable value. Herein, the redox polymer/cement electrolyte (RPCE) of A-Br-10 wt% and D-Br-0.3 M with remarkable ionic conductivity (68.88 and 70.97 mS/cm) and acceptable compressive strength (31.92 and11.04 MPa) are designed, aiming to boost the energy density of SSC by taking advantage of the redox characteristics of Br − . Notably, our fully SSCs with A-Br-10 wt% and D-Br-0.3 M as RPCE deliver a good energy density of 270.84 μWh/cm 2 at areal capacitance of 216.67 mF/cm 2 and an excellent energy density of 446.28 μWh/cm 2 at areal capacitance of 357.02 mF/cm 2 , respectively, while simultaneously maintaining a higher power density of 4500 Wh/cm 2 . These values are superior to the previous studies about all-solid-state SSCs, demonstrating their promising application potential in buildings.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）