JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2018
·Vol. 56
·期 21
·2437-2444
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IF 2.588
Lei Yu,Yanlong Wei,Yuanyuan Tu,Shudong Lin,Zhenzhu Huang,Jiwen Hu,Yue Chen,Hang Qiao,Wei Zou
We report herein a visible light-induced metal-free living polymerization with high oxygen tolerance that can be performed in aqueous media. In contrast with ordinary living/controlled radical polymerizations, oxygen can be present throughout the entire reaction process. This reaction can be photo-induced and proceeds at room temperature. First, we have successfully synthesized a well-defined polymer in an ambient atmosphere by the photo-induced radical polymerization method, using acrylic acid as a monomer and fluorescein as a photocatalyst. However, the subsequent chain extension reaction did not occur, possibly due to oxidation of the chain transfer agent (CTA). Despite this, we found that the addition of vitamin C (ascorbic acid) imparted the process with oxygen tolerance. We conducted a systematic study to optimize the best concentrations of the key reagents including the monomer, CTA, fluorescein, and vitamin C. Through these optimizations we were able to synthesize in the presence of oxygen a series of well-defined poly(acrylic acid)s (PAAs) with dispersities ( Ð ) below 1.3 and molecular weights that closely matched the theoretical values. The kinetic study showed that the molecular weight of the produced PAA increased linearly with the conversion of the monomer, and chain extension reaction also yielded a block polymer with a higher molecular weight than that of the previous polymer. Therefore, we developed a novel photo-induced living polymerization method that can be conducted both in the absence of oxygen and in the presence of air. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 2437–2444
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
Polymer Chemistry
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2017
·Vol. 8
·期 8
·1315-1327
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IF 5.375
Jianbo Tan,Dongdong Liu,Yuhao Bai,Chundong Huang,Xueliang Li,Jun He,Qin Xu,Xuechao Zhang,Li Zhang
A poly(glycerol monomethacrylate) (PGMA) chain transfer agent is used for aqueous reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of 2-hydroxypropyl methacrylate (HPMA) via photoinitiation or thermal initiation. Kinetic studies showed that the rate of polymerization of photo-PISA was much faster than that of thermally initiated PISA, both at the homogeneous polymerization stage and the heterogeneous polymerization stage. The effect of light intensity on photo-PISA was investigated, which showed that increasing light intensity led to faster polymerization behavior. In virtue of the temperature-insensitive property of the photoinitiator, the sole effect of reaction temperature on PISA was studied in detail for the first time. Transmission electron microscopy (TEM) measurements indicated that higher reaction temperature facilitated the formation of higher order morphologies. Finally, a one-pot photoinitiated polymerization was conducted in water to prepare diblock copolymer nano-objects with different morphologies (spheres, worms, and vesicles).
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Guiqing Cheng,Duo Xu,Zhongyuan Lu,Kun Liu
Chiral inorganic nanomaterials are of great interest because of their excellent optical properties. Most of the attention has been focused on the utilization of biomolecules or their derivatives as linkers or templates to control the chiral structure of assembled inorganic nanoparticles. Chiral polymers are promising synthetic materials that can be used to replace their biological counterparts. Here, by using poly(methacrylate hydroxyethyl-3-indole propionate) (PIPEMA) and poly(2-hydroxyethyl methacrylate) (PHEMA) synthesized via syndioselective reversible addition–fragmentation chain transfer polymerization, we successfully realized chiral self-assembly of gold nanorods with strong circular dichroism response in the vis–NIR region. Moreover, the intensity of the chiral signal of the assemblies can be regulated by the molecular weight of the polymers. Notably, although the monomers are achiral and no chiral reagents are involved in their synthesis, the main chains of PIPEMA and PHEMA exhibit a preferred-handed helical conformation, which is the origin of chirality of the nanorod assemblies. The preferred-handed helical conformation of polymers is attributed to their syndiotacticity and stabilized by the steric hindrance of the side groups. The addition of chiral carbon atoms at the side groups does not change the preferred-handedness of the polymer main chain, resulting in the assembled nanorod structures with the same chirality. This strategy provides inspiration for the rational design and synthesis of optically active functional synthetic polymers for the preparation of promising chiral nanomaterials.
研究领域:
材料科学
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化学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2015
·Vol. 408
·期 3
·963-970
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IF 3.436
Xie Xiaoyu,Liu Xia,Pan Xiaoyan,Chen Liang,Wang Sicen
In this work, novel magnetic molecularly imprinted polymers (MMIPs) were prepared by reversible addition fragmentation chain transfer (RAFT) polymerization using sulfamerazine as the template. With the controlled/living property of RAFT polymerization, the resulting MMIPs showed high selectivity for sulfonamides recognition. The MMIPs were characterized by transmission electron microscopy, Fourier transform infrared, vibrating sample magnetometer, X-ray diffraction, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The static and selectivity binding experiments demonstrated the desirable adsorption capacity and high selectivity of the MMIPs. The developed MMIPs were used as the solid-phase extraction sorbents to selectively extract four sulfonamides from aqueous solution. The recoveries of the spiked pond water ranged from 61.2 to 94.1 % with RSD lower than 6.5 %. This work demonstrated a versatile approach for the preparation of well-constructed MMIPs for application in the field of solid-phase extraction.
Surface-imprinted magnetic particles with high magnetism and binding capacity
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2021
·Vol. 11
·期 46
·29042-29051
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IF 3.361
Fen Zhang,Yanling Niu,Yantao Li,Qian Yao,Xiaoqi Chen,Haijun Zhou,Mengmeng Zhou,Jijun Xiao
Smart polymeric vesicles with both tertiary amine and epoxy functional groups were fabricated for the first time via a reversible addition–fragmentation chain transfer dispersion polymerization approach, using (2-(diisopropylamino)ethyl methacrylate (DIPEMA) and glycidyl methacrylate (GlyMA) in an ethanol–water mixture. Monitoring of the in situ polymerization revealed the low molecular weight distributions and the intermediate structures of spheres and worms, indicating an evolution in particle morphology. A phase diagram was constructed for reproducible fabrication of the vesicles, and copolymer composition was found to be more related to particle morphology. The vesicles exhibited superior structural stability for the cross-linking of the core through epoxydiamine chemistry, and intelligent pH responsibility due to the presence of the tertiary amine groups. The cross-linked vesicles showed good stability and reversibility during the swelling and shrinking cycles by switching the pH values, which endowed them with potential cell-like transmission functions. This research thus provides a method for producing structurally stable pH-responsive polymeric vesicles, and the reported vesicles are based on commercially available starting materials for possible industrial scale-up.
研究领域:
材料科学
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化学工程
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生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2018
·
IF 3.716
Fangfang Chen,Jiayu Wang,Ruicong Lu,Huiru Chen,Xiaoyu Xie
A novel microwave-accelerated reversible addition fragmentation chain transfer (RAFT) polymerization strategy has been introduced to shorten reaction time and improved polymerization efficiency of the conventional molecularly imprinting technology based on RAFT. Magnetic molecular imprinted polymers (MMIPs) were successfully synthesized much more efficiently using 17β-estradiol (E2) as a template for the determination of estrogen residues. The resultant MMIPs had well-defined thin imprinted film, favoring the fast mass transfer. Moreover, the reaction time, which was just 1/24 of the time taken by conventional heating, was significantly decreased, improving the reaction efficiency and reducing the probability of side reactions. Meanwhile, the obtained polymers have good capacity of 6.67 mg g −1 and satisfactory selectivity to template molecule with the imprinting factor of 5.11. As a result, a method combination of the resultant MMIPs as solid phase extraction sorbents and high-performance liquid chromatography was successfully set up to determinate three estrogen residues in milk samples. For E2, estrone, and estriol, the limit of detections were calculated to be 0.03, 0.08, and 0.06 ng mL −1 , respectively, and the limit of quantifications were 0.11, 0.27, and 0.21 ng mL −1 , respectively. At the spiked level of 1, 5, and 10 ng mL −1 , the recoveries of the three estrogens were ranged from 69.1% to 91.9% and the intra-day relative standard deviation (RSD) was less than 5.7%. In addition, the resultant MMIPs exhibited good reproducibility and reusability with the inter-batch RSD of 5.3% and the intra-batch RSD of 6.2%, respectively. Overall, the realization of this strategy facilitates the preparation of MMIPs with good architecture and high reaction efficiencies for the analysis of complicated real samples.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2017
·Vol. 55
·期 16
·2650-2656
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IF 2.952
Lvhuan Lin,Jianbing Huang,Zhi'an Ma,Hui Liang,Jiang Lu
A new styrenic monomer 2-propargyloxy-5-vinylbenzaldehyde (PVB) containing both aldehyde and alkyne reactive groups was designed for the synthesis and subsequent orthogonal postfunctionalization of dual-clickable polymer precursor. Reversible addition-fragmentation chain transfer polymerization of PVB afforded a structurally well-defined polymer poly(2-propargyloxy-5-vinylbenzaldehyde) (PPVB) bearing alkyne and aldehyde functionalities that are reactive towards azide - and aminooxy-containing molecules, respectively. Therefore, the resulting PPVB can be served as a dual-clickable polymer scaffold for construction of multiple functional polymers via orthogonal alkyne–azide and aldehyde–aminooxy click reactions. Postpolymerization modification of PPVB sequentially with aminooxy-terminated poly(ethylene oxide)s (H 2 NO-PEO) and azide-functionalized imidazolium-type ionic liquid (N 3 -IL·TFSI, having bis(trifluoromethane)sulfonamide, TFSI, counter-anion) yielded an interesting multicomponent graft polymer PPVB- g -(PEO- and -IL·TFSI). After anion exchange of hydrophobic TFSI counter-anion by bromide (Br) anion, the resulting graft copolymer PPVB- g -(PEO- and -IL·Br) becomes soluble in water, and its imidazolium units can capture negatively charged tetraphenylethylene disulfonate derivative (TPE-2 ) guest molecule via electrostatic complexation to form in situ self-assembled fluorescent nanoaggregates with colloidal stability imparted by hydrophilic PEO chains. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017 , 55 , 2650–2656
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2019
·
IF 3.858
Ruya Wang,Yanru Cui,Fan Hu,Wei Liu,Qiuzheng Du,Yan Zhang,Jun Zha,Tao Huang,Meriem Fizir,Hua He
A well-defined molecularly imprinted polymer (Fe 3 O 4 @CS@MIP) was synthesized via reversible addition-fragmentation chain transfer polymerization for magnetic solid-phase extraction coupled with high-performance liquid chromatography-diode array detector to detect carbamazepine (CBZ) in biological samples. The composition of Fe 3 O 4 @CS@MIP was selected by a two-step screening method. 4-vinyl pyridine, divinylbenzene and dimethylformamide were chosen as the functional monomer, cross-linker and porogen, respectively. The imprinted layer was coated on the surface of the chain transfer agent-modified magnetic chitosan nanoparticles. The prepared Fe 3 O 4 @CS@MIP was characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller measurement and vibrating sample magnetometer. The results indicated that Fe 3 O 4 @CS@MIP had a large surface area (265.8 m 2 /g), high saturation magnetization (19.88 emu/g) and uniform structure. Besides, the binding property of the Fe 3 O 4 @CS@MIP was studied in detail. The Fe 3 O 4 @CS@MIP showed high imprinting factor (IF = 4.83) and desirable adsorption capacity (323.10 μmol/g) to CBZ. Under the optimum conditions, the developed method exhibited excellent linearity (R 2 >0.999) in the range of 0.01–0.5 mg/L and 1.0–30.0 mg/L, and the limits of detection were 1.0 μg/L and 9.6 μg/L for the urine and serum samples, respectively. Good recoveries (88.22%–101.18%) were obtained with relative standard deviations less than 4.83%. This work provided a practical approach for the selective extraction and detection of CBZ in real samples.
研究领域:
分析化学
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材料科学
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医学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2020
·Vol. 10
·期 12
·6850-6857
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IF 3.119
Lingjuan Hu,Qi Wang,Xiaomeng Zhang,Haitao Zhao,Zhe Cui,Peng Fu,Minying Liu,Nan Liu,Shengbao He,Xinchang Pang,Xiaoguang Qiao
A novel raspberry-like γ-Fe2O3@carbon dot (CD) nanocatalyst was prepared and applied for photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization. The nanocatalyst was found to be an efficient photocatalyst in visible light-regulated PET-RAFT polymerization owing to the oxidative quenching mechanism between the photoexcited γ-Fe2O3@CDs and the RAFT agent in the PET process. Notably, polymerization can be reversibly ceased in the absence of light or under an external magnetic field. The superparamagnetic nature and high saturation magnetization value (∼30.4 emu g−1) of the nanocatalyst contribute to convenient recycling of the nanocatalyst after polymerization. The PET-RAFT polymerization with the nanocatalyst before and after recycling was investigated, which displayed all the characteristics of controlled/living polymerization systems.
研究领域:
材料化学
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高分子科学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2016
·
IF 3.897
Yusheng Tang,Shuang Xu,Yunchuan Xie,Junwei Gu,Zhimei Song,Feng Gao,Jie Kong
Surface initiated reversible addition–fragmentation chain transfer polymerization (RAFT) of glycidyl methacrylate (GMA) was conducted on ceramic particles (ZNT). Then the ZNT@PGMA particles were introduced into cyanate ester (CE) matrix to prepare the ultra low dielectric loss ZNT@PGMA/CE composites. The ZNT@PGMA particles can be well dispersed in the CE matrix, resulting in the improvement of glass transition temperature by 40 °C and the increase of storage modulus by 130% in comparison to that of pure CE resins. The introduction of ZNT@PGMA particles can obviously decrease dielectric loss value of the ceramic/CE composites by one order of magnitude, which possesses potential in wave transparent composites and structures.
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
POLYMER BULLETIN
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2016
·Vol. 73
·期 8
·2373-2390
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IF 1.371
Zhu Jinli,Lu Minlei,Wang Miao,Ding Jinjin,Sun Tongming,Tang Yanfeng,Zhang Yuejun
A novel glucose-containing ABC block terpolymer, poly( N -isopropyl acrylamide)-block-poly(acryloyl glucofuranose)-block-poly(acrylic acid) (PNAA) was synthesized by sequential reversible addition–fragmentation chain transfer polymerization. 2 -Dodecylsulfanylthiocarbonylsulfanyl-2-methylpropionic acid was synthesized and was used as a chain transfer agent. The structures were characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance and gel permeation chromatography. Transmission electron microscopy and the phase transition behaviour confirmed that the block terpolymers could directly aggregate into spherical micelles. The results of dynamic light scattering and in vitro drug release experiments demonstrated that the content of the poly(3-O-acryloyl-glucofuranose) segments significantly influences the size of the micelles, the critical micelle concentration (CMC) and the drug release behaviours of the PNAA hydrogels. When the monomer molar ratios of acrylic acid/3-O-acryloyl-glucofuranose/ N -isopropyl acrylamide are 4:2:14, the micelle size of PNAA is 292.3 nm, the CMC is the lowest (0.056 mg/mL), and the amount of cumulative drug release is up to 81 %. In vivo biocompatibility tests and in vitro cytotoxicity tests showed that the synthesized block terpolymer had no apparent cytotoxicity.
研究领域:
高分子化学
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材料科学
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生物医药
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2022
·
IF 4.855
Luoxin Zhuang,Ziyu Huo,Ge Shi,Yanjie He,Zhe Cui,Peng Fu,Minying Liu,Xiaoguang Qiao,Weihua Fan,Xinchang Pang
As one of the most widely used silicone polymers, polydimethylsiloxane (PDMS) microgel particles have broad application prospects in the fields of sensors, polymer toughening agents, bioengineering, and drug delivery. Here, we reported the continuous preparation of homogeneous crosslinked PDMS microgel particles through photoinduced reversible addition-fragmentation chain transfer (photoRAFT) polymerization. Based on the design of methacrylate-functionalized PDMS, the introduction of photoRAFT polymerization allows the formation of microgel particles with homogeneous networks, which were more regular and have better swelling behavior than networks prepared by conventional free radical polymerization processes. Moreover, the dormant polymer chain could be reactivated and lead to the postmodification of PDMS microgel particles. The crosslinking RAFT polymerization was continuously carried out in a flow photoreactor. Uniform PDMS microgel particles with high colloidal stability could be achieved in a short time (0.5–10 min), and the crosslinking densities can be easily tuned by changing the residence time which has less effect on the final particle size.
研究领域:
材料科学
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化学工程
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生物工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）