ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Haifeng Ji,Xin Song,Huitong Cheng,Longbo Luo,Jianbo Huang,Chao He,Jiarui Yin,Weifeng Zhao,Li Qiu,Changsheng Zhao
Free radical polymerization is a mature method and can be used for preparing multifunctional hydrogels by simply changing the commercial monomers, but the harsh and time-consuming initiation conditions restrict its injectable ability, which further limits its application in the biomedical field. Though some catalysts can be used to accelerate the polymerization, their application is restrained by the biotoxicity. Hence, finding a biocompatible catalyzer for in situ free radical polymerization of hydrogels has a great prospect in biomedical application but is still challenging. In this study, we discovered that silver ions could catalyze free radical polymerization under ambient by transforming hydrone into hydroxyl radicals in the presence of ammonium persulfate, and the in situ-formed hydrogels prepared by this way showed great histocompatibility, hemocompatibility, cytocompatibility, and immunocompatibility. Benefitting from its convenience and biocompatibility, the in situ polymerization of polyacrylamide-based hydrogels for tissue adhesion, wound dressing, and conductive materials on the skin could be realized by simply blending diverse ingredients. Furthermore, this discovery may be a step toward the in situ-polymerized hydrogels for biomedical applications.
研究领域:
生物医学工程
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材料科学
·
组织工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2018
·Vol. 20
·期 1
·10
·
IF 3.687
Gaoqi Ma,Xitao Luo,Xitong Sun,Weiyan Wang,Qinghui Shou,Xiangfeng Liang,Huizhou Liu
The modification of the surface of silica gel to prepare hydrophilic chromatographic fillers has recently become a research interest. Most researchers have grafted natural sugar-containing polymers onto chromatographic surfaces. The disadvantage of this approach is that the packing structure is singular and the application scope is limited. In this paper, we explore the innovative technique of grafting a sugar-containing polymer, 2-gluconamidoethyl methacrylamide (GAEMA), onto the surface of silica gel by atom transfer radical polymerization (ATRP). The SiO2-g-GAEMA with ATRP reaction time was characterized by Fourier infrared analysis, Thermogravimetric analysis (TGA), and elemental analysis. As the reaction time lengthened, the amount of GAEMA grafted on the surface of the silica gel gradually increased. The GAEMA is rich in amide bonds and hydroxyl groups and is a typical hydrophilic chromatography filler. Finally, SiO2-g-GAEMA (reaction time = 24 h) was chosen as the stationary phase of the chromatographic packing and evaluated with four polar compounds (uracil, cytosine, guanosine, and cytidine). Compared with unmodified silica gel, modified silica gel produces sharper peaks and better separation efficiency. This novel packing material may have a potential for application with highly isomerized sugar mixtures.Keywords:glycopolymers;ATRP;SiO2-g-GAEMA;packing materials
研究领域:
色谱学
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材料科学
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聚合物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 18
·47379
·
IF 2.188
Lipei Yue,Xiaoyong Zhang,Weidong Li,Ying Tang,Yongping Bai
The use of conductive self-healing hydrogels in electronic devices not only reduces replacement and maintenance costs but also prolongs their lifetime. Therefore, developing hydrogels with autonomous self-healing properties and electronic conductivity is vital for the advancement of emerging fields, such as conductors, semiconductors, sensors, artificial skin, and electrodes and solar cells. However, it remains a challenge to fabricate a hydrogel with high conductivity that can be healed quickly at room temperature without any external stimulus. In this work, we report an effective and simple free radical polymerization approach to synthesizing a hydrogel using modified rGO and acrylate monomers containing abundant ion groups. The hydrogel exhibits excellent electronic conductivity, extremely fast electronic self-healing ability, and excellent repeatable restoration performance at 25 °C. The conductivity of the hydrogel reaches 27.2 S/m, the hydrogel recovers its original shape, and scoring scratched on the surface totally disappears after holding at 25 °C for 40 s. This conductive, room-temperature self-healing hydrogel takes unique advantage of supramolecular chemistry and polymer nanoscience and has potential applications in various fields such as self-healing electronics, artificial skin, soft robotics, biomimetic prostheses, and energy storage. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47379.
研究领域:
材料科学
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电子工程
·
化学
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产品关联
DOI
高影响因子
POLYMER
·
2012
·
IF 3.438
Minghui He,Xun Huang,Yugang Huang,Zhaohua Zeng,Jianwen Yang
The article presents a highly effective strategy for photopolymerization of acrylates via photolatent redox-accelerated reaction based on the synergistic photoinitiating systems containing photolatent superbase and readily available peroxides. Polymerization of acrylates could be instantly initiated with the effective interaction between the photogenerated amine and peroxides. Due to the persistent interaction of produced longeval amine with peroxides, remarkable post conversion after irradiation, which is significant for radiation crosslinking of photo-screened materials, was thus initially achieved in photoinitiated free radical polymerization . To explore the synergistic interactions of the photoinitiating systems, the effect of peroxide structures and QA-DBU:BPO ratios had been examined by RTIR , showing that all peroxides are applicable as the final conversion rate of acrylates is concerned. Further, BPO and CHP significantly accelerated the photopolymerization rate in air atmosphere. The synergistic efficiency of QA-DBU and BPO as a photopolymerization initiatiation system was close to that of the conventional D-1173 photoinitiator .
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2017
·Vol. 8
·期 15
·2363-2369
·
IF 5.375
Yu Liu,Xiaochuan Shui,Meng Wang,Chenguang Zhang,Yuechuan Wang
The radical polymerization of acetylene-bearing acrylates to linear clickable polymers represents a synthetic challenge because acetylenes are too reactive to avoid chain branching or cross-linking. Herein, we report a methodology for the synthesis of acetylene-functionalized clickable polymers via conventional free radical polymerization of a novel acrylate bearing tertiary acetylene, 1-ethynylcyclohexyl acrylate (ECA). This methodology allows the acetylene-functionalized polymers to be prepared by conventional free radical polymerizations without the need to protect the acetylene group before polymerization and without the help of an ATRP/RAFT agent. The characteristics of ECA in free radical polymerization and copolymerization including bulk polymerization and conventional solution polymerization at varied concentrations and reaction times were studied. High molecular weight acetylene-functionalized polymers were prepared and were characterized by SEC, 1H-NMR, FTIR and DSC. When ECA was coploymerized with methyl acrylate, as the feed ratio of ECA increased, the rate of the polymerization reaction and the molecular weight of the copolymer decreased while the molecular weight distribution (PDI) slightly increased. The glass transition temperature of PECA was found to be 110 °C by DSC. The acetylene-decorated polymer chains are thermally cross-linkable and photochemically thiol–yne clickable.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 35
·e54351
·
IF 3
Guanhao Ma,Jiangyu Luo,Jinqing Qu
Two new photoinitiators of acyldiphenylphosphine oxides carrying triphenylamine (NHPO) or pyrene group (BHPO) were designed and synthesized with diphenylphosphine oxide reacting with 4-(diphenylamino) benzaldehyde or 1-pyrenecarboxaldehyde. The solubility of NHPO is about 13.7 wt% in TMPTA, which is higher than that of (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO) (about 12.5 wt%). The UV–Vis spectrum of NHPO and BHPO revealed that their maximum absorption wavelengths have redshifted to 397 and 419 nm, respectively, with a molar extinction coefficient of around 19,057 and 24,257 M −1 cm −1 , suggesting that they are likely to be effective photoinitiators when exposed to light from LEDs. According to real-time Fourier transform infrared spectroscopies, the degree of double bond conversion of NHPO reached 65%, which was higher than that of TPO (about 45%), showing that NHPO had substantially better photoinitiated properties than TPO. Using steady-state photolysis and electron spin resonance spin-trapping studies, the photocuring mechanism was examined, and it was discovered that the NHPO and BHPO had produced two free radicals. Additionally, NHPO exhibited superior biocompatibility performance as demonstrated by cytotoxicity assays and had a low migration rate of only 0.23%, as determined by migration. As a result, NHPO might be utilized in coatings for food packaging.
研究领域:
材料化学
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光化学
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生物医学工程
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Xianjun Zhao,Bo Hu,Qun Zhou,Yijie Yu,Erhong Hao,Xing Guo,Yangyang Xu,Changjiang Yu,Ke Sun,Jacques Lalevée
Until now the photopolymerization process is largely dependent on the hazardous UV or near UV light irradiation. Herein this work, a series of boron dipyrromethene (BODIPY) derivatives substituted by electron-donating triphenylamine moiety on different positions were introduced and investigated thoroughly. Markedly, their photoinitiation abilities under mild conditions, e.g. visible LEDs irradiation and room temperature, were examined for the first time. In combination with an iodonium salt and an amine as the co-initiators, these BODIPY dyes could form three-component photoinitiating systems (PISs) for the purpose to initiate both the free radical polymerization of acrylate monomers and cationic polymerization of epoxy monomers. Interestingly, under the irradiation of LED@405 nm, LED@530 nm or LED@660 nm, some of these BODIPYs-based PISs could conduct high monomeric conversion and rapid photopolymerization rates, as reflected by the relevant photopolymerization kinetics. Then the notable photochemical reactivity of these BODIPY dyes was examined by both steady state photolysis and fluorescence quenching experiments, and theoretical calculation was also performed on them in details. Finally, photocuring 3D printing technique was applied to the acrylate/epoxy mixture resin, as the result the BODIPYs-based PISs demonstrated great potential to fabricate truly three-dimensional objects in macroscopic scale with excellent spatial resolution.
研究领域:
材料科学
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化学工程
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光学工程
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产品关联
DOI
高影响因子
Polymer Chemistry
·
2013
·Vol. 4
·期 15
·4245-4255
·
IF 5.231
Yeli Fan,Baoping Lin,Ying Sun,Xiaohui Gong,Hong Yang,Xueqin Zhang
Two novel polymers (PFMA-Ma and PFMA-Mb) were synthesized through an efficient and simple method combining conventional free radical polymerization and a Diels–Alder reaction. Different molar percentage compositions of the functionalized pendants in the polymers and two different steric configurations: endo and exo in the D–A adduct structures are revealed in 1H NMR spectra. In addition, DSC curves demonstrate that the reverse Diels–Alder reactions take place at higher temperatures (between 120 °C and 150 °C). Moreover, both of the fluorescence intensities of the two polymer films (PFMA-Ma (x = 0.700) and PFMA-Mb (x = 0.609)) become weak and even almost disappear with the increase of the annealing temperature, indicating that thermal annealing induces π–π stacking and aggregation of the pendants in the polymers. Concurrently, as the molar ratios of pendant moieties in the polymers are increased, a characteristic peak of face-to-face stacking appears in the fluorescence spectra of PFMA-Ma and a slight red-shift is observed in the fluorescence spectra of PFMA-Mb. These phenomena suggest that high molar percentage of pendants is also beneficial to their π–π stacking and aggregation. This study may provide some insights into the stacking of pendants in polymers and its influencing factors, which will be useful when these polymer materials are applied in optoelectronic devices.
研究领域:
材料科学
·
有机化学
·
光电子学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 19
·期 3
·722-728
·
IF 8.506
Miaomiao Han,Xiao Liu,Xiaosa Zhang,Yuanyuan Pang,Peng Xu,Jianwei Guo,Yadong Liu,Shuangyan Zhang,Shengxiang Ji
5-Hydroxymethylfurfural (HMF) is an important platform chemical derived from biomass. Tremendous efforts have been made to transform HMF into valuable chemicals for applications in biofuels, materials science, and pharmaceuticals. Here we report the conversion of HMF into 5-hydroxymethyl-2-vinylfuran (HMVF), a versatile adhesive. HMVF can bond to a variety of substrates, e.g. metal, glass, plastics and rubber, under heating or acid treatment at room temperature. Mechanistic studies show that the vinyl group undergoes free radical polymerization and the hydroxyl group dehydrates to form an ether linkage to crosslink HMVF under either heating or acid treatment. The bonding strength (τ) of HMVF cured by heating (h-HMVF) is close to that of Krazy Glue (Loctite 401, cyanoacrylate) and higher than that of white glue (Pattex No. 710, PVA) and Pattex PKME15C epoxy glue. The outstanding adhesive performance of HMVF is attributed both to the interaction of hydroxyl groups with substrates and crosslinking by etherification between hydroxyl groups. Similar to Krazy Glue, HMVF is also used in its monomer form, which eliminates the use of solvents. Cells show good adhesion on crosslinked HMVF, which makes HMVF a potential bio-adhesive.
研究领域:
化学工程
·
材料科学
·
生物技术
✓ 已验证
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Chaofan Zhou,Jinghang Wang,Hewen Liu
Free-standing 2D polymer materials with graphene-like crystalline layers hold great promise for many state-of-art applications. However, their fabrication remains challenging. A ferrocene tethered cyclopolymer (pFcMMA) is synthesized via the free radical polymerization of a divinyl monomer in this work. PFcMMA has a high degree of cyclization, but is not a stereo-regular structure like most vinyl polymers synthesized in free radical polymerization . PFcMMA can crystallize on the surface to form 2D crystals, which is evidenced by the birefringence phenomena, DSC and XRD analysis, and microscopic observation. Powder XRD of crystalline pFcMMA shows sharp interlayer diffraction, indicative of a highly crystalline phase. The crystallization process is supposed to follow the nonclassic crystallization pathway, i.e. the orientation of cyclopolymer main chains followed by the conformation transition of the side groups to form 2D crystalline layers. Variable temperature XRD combined with DSC analysis and polarizing optical microscopic observation demonstrate that the 2D crystalline phase begins to transition to a 3D crystalline phase at about 45 °C, the latter has a melting point at about 60 °C. The solid-solid crystalline transition is reversible and without intermediate melting, and the 2D crystalline phase is more stable at room temperature than the 3D phase. It is rationalized that nucleation from solutions is predominantly an entropy-driven process, while interactions between side groups and those between far separated main chains also benefit the formation of 2D crystalline phase. The commonalities of the crystallization processes of cyclopolymers are discussed.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 6
·1572-1581
·
IF 2.347
Xu Qingbo,Ke Xiating,Zhang Yanyan,Wang Peng
Improving the surface roughness and reducing the surface energy are the main strategies for constructing cotton fabrics with superhydrophobic surface. However, the complex finishing process and poor durability still impede the production and application of superhydrophobic cotton fabrics. Therefore, it is critical to produce superhydrophobic fabrics with excellent durability via a noncomplicated method. In this work, monomers of methyl methacrylate (MMA) and trifluoroethyl methacrylate (TFMA) were polymerized via free radical polymerization to produce a fluoropolymer. Then, the fabric was coated with the fluoropolymer to construct a superhydrophobic surface via the pad-dry-cure technology. The TFMA unit in the fluoropolymer had lower surface energy than the MMA unit. Under the high-temperature curing condition, the MMA unit in the fluoropolymer was grafted onto the cotton fabric via transesterification, and the TFMA was exposed on the fabric surface. The finished fabric showed durable superhydrophobic properties, outstanding oil-water separation properties, and excellent self-cleaning properties. Given the results, the finished fabric has great potential application in clothing and industrial fields.
研究领域:
材料科学
·
纺织工程
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2013
·Vol. 20
·期 6
·1-7
·
IF 2.019
Wu Xueli,Qiu Jianhui,Liu Peng,Sakai Eiichi,Lei Lin
DENKA BLACK/polystyrene nanocomposites (DB/PS) were successfully prepared through a facile strategy. Some of the styrene molecules were grafted and polymerized onto the surface of the DB via the in situ free radical addition process in ionic liquid, and others self-polymerized and coated on the polystyrene grafted DB. The ionic liquid improves the grafting percentage because of its high viscosity. The electrical properties of polymer composites before and after the grafting were measured. It was found that the electrical conductivity of the DB/PS composites decreased with increasing amounts of monomer styrene and initiator 2, 2′-azobis (isobutyronitrile) (AIBN). The microstructure, morphology and thermal properties of the composites were characterized by Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. The results proved that the polystyrene had been successfully grafted onto the DB surface.
研究领域:
高分子化学
·
纳米复合材料
·
功能材料
·
电学性能
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）