Analytical Methods
·
2024
·Vol. 16
·期 36
·6279-6289
·
IF 2.7
Yue Chen,Shaokai Du,Ailu Cui,Shipeng Jiang,Yuxuan He,Shuhan Yang,Ruyi Ma,Yue Sun
Temperature-responsive yeast cell-imprinted sensors (CIPs/AuNPs/Ti3C2Tx/AuNPs/Au) were prepared based on fluorescein isothiocyanate labeled yeast cells (FITC-yeast) via metal-free visible-light-induced atom transfer radical polymerization (MVL ATRP). Here, N-isopropyl acrylamide (NIPAM) was used as a temperature-responsive functional monomer, α-methacrylic acid (MAA) was chosen as an auxiliary functional monomer, N,N′-methylene bisacrylamide (MBA) was used as a cross-linker, and FITC-yeast was selected as both a template and photocatalyst. Under the optimal conditions, the detection range of the yeast cell-imprinted sensor toward yeast cells was 1.0 × 102 to 1.0 × 109 cells per mL, and the detection limit was 11 cells per mL (S/N = 3), with a linear equation of ΔI (μA) = 8.44 log[C (cells per mL)] + 7.62 (R2 = 0.993). The sensor showed good selective recognition in the presence of interfering substances such as autolyzed yeast cells (AY), dead yeast cells (DY), human mammary epithelial cells (MCF-10A), human breast cancer cells (MCF-7) and Escherichia coli (EC). The sensor also had good consistency and reproducibility. Finally, spiked recovery experiments were performed to investigate the recognition of yeast cells in the actual sample using the yeast cell-imprinted sensor. The spiked recoveries were all in the range of 98.5–108.0%, and the RSD values were all less than 4%, indicating that the sensor had good application prospects.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Chuanwei Lu,Xiaoliang Guo,Chunpeng Wang,Jifu Wang,Fuxiang Chu
Well-defined sustainable and recyclable thermoset elastomers derived from cellulose, fatty acid and furfural were successfully prepared via photoinduced metal-free ATRP and Diels-Alder (DA) reaction. Firstly, metal free ATRP was applied to prepare a range of thermoplastic cellulose graft copolymers with furfural groups. Then, a modified epoxidized soybean oil bearing 6-maleimidohexanoic group (ESOM) as a crosslinker was employed to perform DA reaction with furfural groups in these cellulose graft copolymers, by which the copolymer formed the dynamic crosslinked network and achieved the thermoset elastomers. The dynamic crosslinked network formed by DA reaction not only could increase the chain entanglement that was associated with the improved flexibility and could contribute to enhancing the mechanical strength up to 166 %, but also endowed these thermoset elastomers with recyclability, excellent shape memory and self-healing property. These thermoset elastomers can be used as self-healing strain sensor and wearable sensing devices after compounding them with carbon nanotubes.
研究领域:
材料科学
·
化学工程
·
可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 2
·1087-1102
·
IF 6.123
Li Chunyu,Hou Zehua,Li Pan,Zhang Guomin,Bai Liangjiu,Wang Wenxiang,Chen Hou,Yang Huawei,Yang Lixia
Cellulose nanocrystals (CNCs) have been widely used in the surface modification and construction of nanocomposites due to their excellent surface activity and high tensile strength. In this manuscript, nanocomposite hydrogels were prepared by implanting poly(glycidyl methacrylate)-modified CNCs (CNCs@PGMA) and biomass phytic acid (PA). After extracting CNCs from microcrystalline cellulose, PGMA was successfully grafted on the surface of CNCs by surface-initiated Activator Generated by Electron Transfer Atom Transfer Radical Polymerization (SI-AGET ATRP). With the assistance of PA, the reversible hydrogen bonding interaction between the internal structures of the matrix was promoted to construct the CNCs@PGMA/PA self-healing nanocomposite hydrogels. The obtained hydrogels by using CNCs@PGMA and PA as additives have excellent mechanical properties (tensile strength of 1.39 MPa) and self-healing ability (91.4% after 6 h). This study develops a facile method for the preparation of nanocomposite hydrogels with excellent self-healing properties. Graphical abstract
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2023
·Vol. 57
·期 2
·523-535
·
IF 3.4
Zhou Yihang,Zhang Yue,Wang Kai,Hu Dongbo
Controls over the dimensions of waterlogged archaeological wood (WAW) upon drying are a critical issue for its conservation. Surface-initiated activator regenerated by electron transfer atom transfer radical polymerization (SI-ARGET ATRP) has been proven to be an effective consolidation method to increase the dimensional stability. However, the drawback of the current method is that the expansion stress generated during graft polymerization cannot be well controlled. An improved SI-ARGET ATRP system using a bifunctional monomer ethylene glycol dimethacrylate (EGDMA) to introduce a cross-linking process during the polymerization is presented in this paper. Both Pinus massoniana and Sapium sp. samples with different maximum moisture contents as 507% and 863%, respectively, show a reduced volumetric shrinkage of around 5% without any expansion phenomenon after the treatment. This method shows potential applications in the field of WAW conservation and may provide a new solution for consolidation of other organic archaeological objects as well as developing new wood-based materials.
研究领域:
考古学
·
材料科学
·
文物保护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
·
2019
·Vol. 96
·期 1
·69-79
·
IF 1.429
Duan Nannan,Ye Lin,Zhang Ai-ying,Feng Zeng-guo
Abstract A series of PPR-based multiblock copolymers were prepared by using a PPR self-assembled from a distal 2-bromoisobutyryl end-capped ferrocenyl containing derivative Br-TEG-Fc-TEG-Br with 4 β-CDs as initiator to initiate the in situ ATRP of NIPAAm in aqueous solution at room temperature. After the ATRP, about 2 β-CDs were resided on the polymeric backbone through a 7 day dialysing purification, but those β-CDs were all slipped off the polymeric chain through a further 7 day dialysing treatment. It suggested that the resulting multiblock copolymers are really the PPR-based instead of the PR-based ones showing an impeded dethreading behavior of β-CDs and the PNIPAAm blocks attached are not bulky enough as polymeric stoppers to end-cap the β-CD-TEG-Fc-TEG PPRs into the PR-based multiblock copolymers. Graphic abstract A series of PPR-based multiblock copolymers were prepared by using a PPR self-assembled from Br-TEG-Fc-TEG-Br with 4 β-CDs as initiator to initiate the aqueous ATRP of NIPAAm. After the polymerization there are about 2 β-CDs still entrapped on the polymeric chain through a 7 day dialyzing purification. Those threaded β-CDs are all slipped off the polymeric backbone through a further 7 day dialyzing treatment.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2012
·Vol. 32
·期 6
·1699-1703
·
IF 2.686
Jing Ma,Hou Chen,Min Zhang,Chunhua Wang,Ying Zhang,Rongjun Qu
Yb-based catalyst was used for the first time for atom transfer radical polymerization using activators generated by electron transfer (AGET ATRP) of acrylonitrile (AN) with 2-bromopropionitrile (BPN) as initiator, 2, 2′-bipyridine (bipy) as ligand, and tisn(II) bis(2-ethylhexanoate) (Sn(EH) 2 ) as reducing agent in the presence of air. With respect to AGET ATRP of AN catalyzed by CuBr 2 , an evident increase of polymer tacticity was observed for AGET ATRP of AN. The increase of syndiotacticity became more and more pronounced than the increase of isotacticity of polyacrylonitrile (PAN) along with YbBr 3 content. The block copolymer PAN-b-PMMA with molecular weight at 60,000 and polydispersity at 1.36 was successfully prepared.
研究领域:
高分子化学
·
材料科学
·
催化化学
·
聚合物合成
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Engineered Fibers and Fabrics
·
2021
·
IF 1.573
Qijian Niu,Lili Ma,Junxia Guo,Xiaoping Yang
In this study, a temperature responsive PGS/PLLA@PNIPAM core-shell nanofiber membrane was prepared by combining electrospinning with surface ATRP grafting polymer technology, in which the core layer of PGS/PLLA nanofiber was prepared by electrospinning, and then the shell layer of temperature responsive PNIPAM polymer was grafted on the nanofiber surface by ATRP reaction. In the experiment, a macromolecule-initiator PGS-Br was prepared and characterized by FTIR and 1H NMR. The surface morphology, composition, element of the core-shell nanofiber membrane were characterized by SEM, FTIR, and XPS. In addition, it is worth noting that the core-shell nanofiber membrane can respond to temperature in drug release tests.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
药物传递系统
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yadong Yang,Fuchun Zhao,Hong Zhang,Shuangquan Liao
Natural rubber, as the renewable and important industrial raw material, is widely used in many fields such as automobiles, construction, and healthcare. Nevertheless, the existence of unsaturated carbon‑carbon double bonds leads to its relatively poor weather resistance. Since the carbon‑fluorine components with high bond energy can endow the fluorinated materials excellent thermal stability, chemical resistance, and ultra-weatherability, an activators regenerated by electron transfer for atom transfer radical polymerization (ARGET-ATRP) was utilized to grow the fluorinated polymethacrylate side chain (PFASC) from the backbone chain of natural rubber, and the influence of PFASC on the network structure of natural rubber was examined in this work. GPC indicated that the molecular weight of PFASC varied linearly with the monomer conversion rate, which proofed that PFASC can be grown in a way of living radical polymerization and the molecular weight of PFASC can be tailored effectively. The results revealed that the entanglement between PFASC and the physical cross-linking originated from the intermolecular hydrogen bonds both contributed to the improvement of the elastic modulus and green strength of the fluorinated natural rubber.
研究领域:
高分子科学
·
材料工程
·
化学合成
·
工业化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Teng Xue,Erjun Tang,Xiaofeng Guo,Ruihong Wang,Lei Zhao,Jian Zhou,Shaojie Liu
The ionic liquid 1-(triethylene-tetramine)ethyl-3-methyl chloride ([N 4 MIM]Cl) was first prepared to replace the organic ligand coordinating with CuBr to catalyze atom-transfer radical polymerization (ATRP) in ionic liquid system. [N 4 MIM]Cl was synthesized via the intermediate IL 1-chloroethyl-3-methyl chloride ([CeMIM]Cl) reacting with the aliphatic amine triethylene tetramine (TETA) and [CeMIM]Cl) was obtained by N′-alkylation of N -methylimidazole with 1,2-dichloroethane. This catalyst has been applied to the ATRP of methyl methacrylate (MMA) in the ionic liquid (IL) 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) and presented a perfect catalytic performance. The chemical structures of the ILs obtained were confirmed by FTIR and 1 H NMR. The coordination ability of [N 4 MIM]Cl was assessed by cyclic voltammetry (CV) and its coordination mechanism towards CuBr was discussed. The [N 4 MIM]Cl/CuBr catalyst system showed good controllability in the aforementioned ATRP reaction in [AMIM]Cl. The amount of residual Cu 2+ in the polymer product was determined by atomic absorption spectrometry (AAS) and the result showed that the Cu catalyst was easily separated from the obtained polymer. Thus, the coordinating IL could overcome the shortcomings of traditional organic ligands, such as poor compatibility with IL media resulting in the weakly catalytic performance and inferior separation of the catalyst from the polymer. It implied that the coordinating ionic liquid ([N 4 MIM]Cl) has highly promising application in the ATRP of ionic liquid system.
研究领域:
材料化学
·
高分子化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 26
·2315741
·
IF 18.5
Yingxue Liu,Zongyu Wang,Yuqi Zhao,Guanyi Hou,Ruifeng Jiang,Michael R. Bockstaller,Xuan Qin,Liqun Zhang,Krzysztof Matyjaszewski
Nanoparticle reinforcement is a general approach toward the strengthening of elastomer nanocomposite in large-scale applications. Extensive studies and efforts have been contributed to demonstrating the property reinforcement of polymer nanocomposites in relation to matrix-filler and filler-filler interaction. Here, a facile synthetic method is creatively reported to synthesize SiO 2,15/120 - g -polyisoprene (SiO 2 - g -PI) particle brushes using atom transfer radical polymerization (ATRP). The dispersion and microstructures of the nanoparticles in the nanocomposites are investigated by morphological characterizations, whereas the reinforcing mechanism is studied through mechanical measurements as well as computational simulation. Remarkably, compared with the cured bulk elastomers and matrix(M)/SiO 2 blends, M/particle brushes (PB) exhibit significant improvement in mechanical properties, including tensile strength, elongation at break, modules, and rolling resistance. This elastomer nanocomposites afford a novel prospect for the practical application of next-generation automobile tires with enhanced performance.
研究领域:
材料科学
·
高分子化学
·
纳米复合材料
·
橡胶技术
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2017
·
IF 3.615
Mingsen Chen,Lanmei Qin,Yuanli Liu,Faai Zhang
Surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) was employed for controlled grafting of poly(glycidyl methacrylate) (PGMA) and poly(glycidyl methacrylate)-b-poly(methyl methacrylate) (PGMA-PMMA) brushes from mesoporous silica SBA-15. Initiator 2-bromoisobutyryl bromide (BiBB) was immobilized onto the inner surface of SBA-15 by reaction with free silanol groups. The polymerizations were conducted in the mixed solvents cyclohexanone /N, N-dimethylformamide. The strategy of utilizing mixed solvents gave rise to a suitable polymerization rate and resulted in a good control of the PGMA growth within the SBA-15 framework and could obtain polymer chains with well-preserved chain end functionality. Molecular weight of grafted polymer, structure, morphology, and composition of the functionalized SBA-15 were characterized by using gel permeation chromatography (GPC), X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), N 2 adsorption/desorption measurements, fourier transform infrared spectroscope (FT-IR), and thermogravimetry analysis (TGA), respectively. The thickness, polymer grafting density and molecular weight of the grafted polymer can be controlled by adjusting the polymerization time. The deactivator cannot efficient diffuse to convert the propagating chains to the dormant species when the pores are nearly completely filled with the polymer, therefore, increasing grafting density resulted in higher molecular weight and polydispersity index (PDI) values for the grafted polymer chains. This work provides a facile route for preparation of well-defined mesoporous silica/polymer hybrids.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Junyu Chen,Meiying Liu,Qiang Huang,Ruming Jiang,Hongye Huang,Fengjie Deng,Yuanqing Wen,Jianwen Tian,Xiaoyong Zhang,Yen Wei
Carbon-based fluorescent nanoparticles are considered to be new promising nontoxic fluorescence probes which suitable for various bioimaging and biomedical applications. However, the synthesis and production of such high-quality fluorescent carbon-based nanoparticles is still challenging, and its most application potential is unexplored. In this work, we introduce a facile light-induced surface-initiated atomic transfer radical polymerization (SI-ATRP) method to fabricate the nanodiamonds (NDs) based fluorescence probes in the absence of transition metal ligands. In this sample way, the Fluorescein was employed and played the role as the fluorescent signal and photocatalyst simultaneously for its photochemical property. Besides, the poor dispersibility of pristine NDs was also obviously improved by modifying with PEGMA , and the modified NDs (FNDs-polyPEGMA) display good dispersion and biocompatibility via characterization methods. A series of characterization techniques were also carried out to confirm the successful fabrication of fluorescent NDs after polymerization. Through our investigation, the as prepared FNDs-polyPEGMA nanoparticles with high dispersibility and stable green fluorescence could be the potentially used fluorescent probes in biomedical application.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）