POLYMER
·
2020
·
IF 4.231
Xiao Wang,Pengxiang Yu,Kangmin Zhang,Mingyuan Wu,Qingyun Wu,Jiuyi Liu,Jianjun Yang,Jianan Zhang
Both oil spill and heavy metal ions in the industrial wastewater cause severe problems for aquatic ecosystem and human health. Herein, a preparation method of solid particle-free polymer grafted biodegradable cotton fabrics without auxiliary of fluorine and silicon was proposed for sequential separation of oil/water mixture and removal of heavy metal ions . Superhydrophobic poly (acrylonitrile-co-styrene) grafted cotton fabrics (CF-g-PSAN) designed for oil/water separation were fabricated by successive initiator tethering and polymer grafting via surface-initiated atom transfer radical polymerization (SI-ATRP). Furthermore, pendant amino diethylenepentamine groups were introduced to surface grafted brushes of aminated CF-g-PSAN (CF-g-APSAN) by reaction with tetraethylenepentamine . The obtained CF-g-PSAN exhibited superhydrophobicity with WCA achieving 150° due to the combination of surface tethered hydrophobic PSAN and increased surface roughness . High grafting density of hydrophilic CF-g-APSAN enabled heavy metal ions free access towards APSAN brushes in aqueous medium and maximized the number of accessible chelating sites towards heavy metal ions originating from the high affinity of pendent amino diethylenepentamine groups. In the sequential treatments of oil/water separation and heavy metal ion removal, the polymer grafted cotton fabrics achieved a high oil/water separation efficiency exceeding 97.8% and demonstrated as excellent adsorbent towards heavy metal ions with record-high uptake capacity of about 682.5, 375.8, 438.3, 535.7 mg/g for Pb (II), Cu (II), Zn (II), and Ni (II), respectively. Furthermore, the excellent efficiency, operability, and recyclability of CF-g-APSAN were verified in dealing with aqueous solution of the separated water phase under dynamic flow conditions with high removal rates of 91, 89, 89, and 87% for Pb (II), Cu (II), Zn (II), and Ni (II). The recyclable CF-g-PSAN and CF-g-APSAN demonstrated combined high separation efficiency and record-high adsorption capacity, which are expected to find industrial applications in oily wastewater treatment as sustainable and highly effective materials.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2019
·
IF 0
Xiao Wang,Pengxiang Yu,Kangmin Zhang,Mingyuan Wu,Qingyun Wu,Jiuyi Liu,Jianjun Yang,Jianan Zhang
This Article reports the facile fabrication of robust and durable superhydrophobic and superoleophilic cotton for highly efficient oil–water separation based on the combination of hydrophobic octadecanoyl chain bonding and polymer grafting via surface-initiated atom transfer radical polymerization (SI-ATRP). Octadecanoyl chain-tethered and polymer-grafted superhydrophobic cotton was obtained by simultaneous treatment with stearoyl chloride and α-bromoisobutyryl bromide to generate hydrophobic cotton bearing initiating sites for ATRP (C18-Cotton-Br), followed by SI-ATRP of acrylonitrile and styrene to obtain polymer-grafted cotton (C18-Cotton-g-PSAN). The surface morphologies, chemical composition, and structural identity of the modified cotton were investigated by scanning electron microscopy (SEM), FT-IR, X-ray photoelectron spectroscopy (XPS), and the nitrogen physisorption experiments. The water contact angle (WCA), oil–water separation, oil absorption, and mechanical properties of the cotton samples were evaluated systematically. The results showed that octadecanoyl and α-bromoisobutyryl groups were successfully bonded on pristine cotton to exhibit hydrophobicity, and further polymer grafting of PSAN was realized with a high grafting density of about 0.47 nm–2. Compared with C18-Cotton-Br, after polymer grafting C18-Cotton-g-PSAN displayed enhanced superhydrophobicity with the WCA increasing from 154° to 159° due to the increased surface roughness. C18-Cotton-g-PSAN exhibited a highly efficient oil–water separation achieving 99.2%, excellent absorption capacity of 26 g/g for toluene with an easily recovered performance, and remarkable mechanical durability withstanding the severe environmental conditions. The biodegradable and recyclable C18-Cotton-g-PSAN demonstrated high selectivity for the absorbing of oil and is expected to become sustainable and highly effective materials for oil-spill cleanup and the oily wastewater treatment from households and industries. Endowed with the robust superhydrophobic durability, the superhydrophobic and superoleophilic cotton can be further woven into cotton fabric to demonstrate their versatilities.
研究领域:
材料科学
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环境科学
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产品关联
DOI
EUROPEAN POLYMER JOURNAL
·
2015
·
IF 3.005
Erjun Tang,Kaidi Du,Xiaoyan Feng,Miao Yuan,Shaojie Liu,Dishun Zhao
The pH-responsive cellulose-g-poly[2-(diethylamino)-ethyl methacrylate] (cellulose-g-PDEAEMA) copolymers were successfully synthesized by atom transfer radical polymerization (ATRP) in the ionic liquid 1-allyl-3-methylimidazolium chloride ([AMIM]Cl). As the functional monomer 2-(diethylamino)ethyl methacrylate (DEAEMA) hardly dissolved in [AMIM]Cl, we used ethyl alcohol as the cosolvent to increase its solubility and thereby form a homogeneous system. Compared with the synthetic mechanism for the heterogeneous system, generation of the byproduct poly[2-(diethylamino)ethyl methacrylate] (PDEAEMA) in the homogeneous system was reduced and the ATRP reaction was easily controlled. Optimum reaction condition was attained at the CuBr/PMDETA/DEAEMA/ethyl alcohol molar ratio of 1:15:150:300. Kinetic analysis confirmed the reaction was living and controllable. Cellulose-g-PDEAEMA was characterized through FTIR, 1 H NMR, TEM and GPC. The results showed that the PDEAEMA brush was covalently bonded to the cellulose backbone and its molecular weight distribution was narrow. In addition, the resultant copolymer could self-assemble into spherical micelles and showed the pH-sensitivity, implying its potential application as biomedical materials.
研究领域:
材料科学
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高分子化学
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生物医学工程
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Junyu Chen,Meiying Liu,Qiang Huang,Ruming Jiang,Hongye Huang,Fengjie Deng,Yuanqing Wen,Jianwen Tian,Xiaoyong Zhang,Yen Wei
A novel and facile strategy that combination of surface ligand exchange and photo-initiated atom transfer radical polymerization (ATRP) has been developed for the preparation of fluorescent hydroxyapatite (HAp) based polymer composites, which were utilized for biological imaging applications. In particular, the photo-initiated ATRP not only inherited advantages of traditional ATRP but also overcome its deficiencies such as high energy consumption, transition metal contamination and long reaction time. In this method, a hydrophilic and biocompatible PEGMA was introduced to enhance the hydrophilic and biocompatibility of HAp nanocomposites. Simultaneously, the HAp-poly(PEGMA- co -AcFl) composites are endowed with bright green fluorescence by grafting with AcFl on the surface via copolymerization. The physicochemical properties of HAp-poly(PEGMA- co -AcFl) composites were characterized by a series of methods in detail. Results confirmed that HAp-poly(PEGMA- co -AcFl) composites possess controlled size and morphology, high water dispersibility and strong fluorescence. The cell viability and cell uptake behavior demonstrated that HAp-poly(PEGMA- co -AcFl) composites present low toxicity and can be potentially used for biological imaging. Taken together, we have developed a facile and efficient method for the fabrication of fluorescent HAp composites with desirable physicochemical and biological properties.
研究领域:
材料科学
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生物材料
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聚合物化学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2015
·
IF 3.091
Lixin Xing,Ningning Guo,Yatao Zhang,Haoqin Zhang,Jindun Liu
Silica spheres in nanoscale were prepared via sol–gel method and then sodium 4-styrene sulfonate was grafted onto the surfaces of SiO 2 (PSS-SiO 2 ) by surface-initiated atom transfer radical polymerization (SI-ATRP). Then, a negatively charged loose SiO 2 -PSS/polyethersulfone (PES) nanofiltration membrane with high flux was fabricated via phase inversion method. FT-IR and TEM results showed that SiO 2 nanoparticles were synthesized and modified successfully. GPC results further proved the “living”/controlled behavior of SI-ATRP. The morphology, hydrophilicity of the membranes were investigated by SEM, static water contact angle and water ratio. The results revealed that the surface hydrophilicity and water permeability of hybrid membranes were greatly improved after adding SiO 2 -PSS and thus may enhance fouling resistance to a certain extent. The salt permeation and separation of dye/salt mixture of the hybrid membranes were significantly superior to the pure PES membrane, and the order of permeation for different salt solutions was NaCl > MgCl 2 > MgSO 4 > Na 2 SO 4 . When the content of SiO 2 -PSS was 3.0 wt%, the hybrid membrane showed optimal performance with IEC value of 0.07 mmol/g and pure water flux of 269.5 L m −2 h −1 and the rejections for all types of salts declined to under 11%. The above results indicated that SiO 2 -PSS incorporated into PES matrix played an important role in enhancing the performance of NF membranes, which may possess a significant impact on the application in dye purification and desalination.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
BMC Chemistry
·
2020
·Vol. 14
·期 1
·1-11
·
IF 0
Liu Huachun,Gong Bolin,Zhou Yanqiang,Sun Zhian,Wang Xiaoxiao,Zhao Shanwen
A novel polystyrene sulfonate sodium (PSS) magnetic material was prepared by surface-initiated atom transfer radical polymerization (SI-ATRP). The starting materials were brominated magnetic material as the carrier and macroinitiator, sodium styrene sulfonate (NaSS) as the monomer, and cuprous bromide/2,2′-dipyridyl as the catalyst system. The PSS material was characterized by Fourier transform infrared spectroscopy (FT-IR), elemental analysis, transmission electron microscope (TEM), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and a vibrating sample magnetometer (VSM). The adsorption properties of the material were then investigated on sulfa antibiotics. The kinetic and thermodynamic parameters were determined in adsorption of sulfamethazine (the smallest molecular-weight sulfonamide). The adsorption amount of sulfamerazine free acid (SMR) was found to increase with the initial concentration and temperature of SMR in solution. The adsorption effect was maximized at an initial concentration of 0.6 mmol/L. The static saturation adsorption capacity of the material was 33.53 mg/g, Langmuir and Freundlich equations exhibited good fit. The thermodynamic equilibrium equation is calculated as ΔG < 0, ΔH = 38.29 kJ/mol, ΔS > 0, which proves that the adsorption process is a process of spontaneous, endothermic and entropy increase. Kinetic studies show that the quasi-second-order kinetic equation can better fit the kinetic experimental results, which is consistent with the quasi-second-order kinetic model. The experimental results of kinetic studies were well fitted to a quasi-second-order kinetic equation. High performance liquid chromatography (HPLC) of an actual milk sample treated by the PSS magnetic material confirmed the strong adsorption of SMR from milk.
研究领域:
材料科学
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环境科学
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化学工程
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分析化学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Hui Li,Songsong Tang,Qingqing Zhou,Wei Chen,Xixue Yang,Tieling Xing,Yan Zhao,Guoqiang Chen
Fluorinated polyhedral oligomeric silsesquioxane (F-POSS) is one of the most popular candidates at present for superhydrophobic coating. Because of its ultralow surface energy, F-POSS has usually been dissolved with expensive fluoro-solvents, and the melting temperature of F-POSS is not high (122–140 °C), which will cause its loss during use. So trying to polymerize/crosslink F-POSS molecules and/or directly graft F-POSS to substrate is important. In this work, we report the SI-eATRP grafting of methacryl POSS (MA-POSS) on cotton and the subsequent amine catalyzed thiol-methacrylate Michael addition reaction of poly(MA-POSS) with 1H, 1H, 2H, 2H-perfluorododecyl-1-thiol (PFDT) for the fabrication of a durable poly(MA-POSS)-PFDT coating. The cotton fabric coated with poly(MA-POSS) was nearly superhydrophobic after 4 h of SI-eATRP process under potentiostatic condition of −0.40 V. Although the water contact angle (WCA) was ~148°, water droplets tended to adhere to the cotton fabric surface even when the fabric was turned upside down. After fluorination , WCA was increased to ~160°, and water drops could slide off when the fabric was slightly tilted. The sliding angle (SA) was ~10°. The as-prepared poly(MA-POSS)-PFDT coating was durable against repeated washing and physical abrasion. After 30 accelerated washing cycles (equals to 150 home laundering cycles), the coated fabric still showed superhydrophobicity. After 800 abrasion cycles over sandpaper, the WCA was still as high as 149°. In addition, the coated fabric had self-healing ability and could restore its superhydrophobicity after plasma etching through heat treatment. After 10 cycles of plasma etching and heat-induced healing process, the WCA of the coated fabric kept at ~154°. Such a durable superhydrophobic fabric coating may find applications in the development of functional clothing for a variety of purposes.
研究领域:
材料科学
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纺织工程
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表面化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22617-22628
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IF 14.511
Haicun Yang,Yu Jiang,Kaide Wu,Shuipi Cai,Wenzhong Ma,Zheng Cao,Fanghong Gong,Chunlin Liu,Guoliang Tao,Ji Pan
Here, we report a new facile method to improve both the conductivity and alkaline stability of anion exchange membranes (AEMs) by directly growing poly(ionic liquid) (imidazolium cations, PImIL) from bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BrPPO) and the surface of bromobenzylated carbon nanotubes (Br@CNTs) via one-pot simultaneous activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) and the following ionizing co-crosslink. Both PPO and CNTs are deeply ionized to fabricate a kind of dual-cation organic–inorganic hybrid co-crosslinked network with widening long-range ion transport channels in AEMs, which endows the resultant hybrid membrane with excellent ion conductivity, dimensional stability, and mechanical strength. The PPO-PImIL/PImIL@CNT hybrid co-crosslinked membrane with a higher ion exchange capacity of 2.29 mmol g−1 shows a hydroxide ion conductivity of 189.8 mS cm−1 at 80 °C, about 2.5 times higher than that of pristine imidazolium-modified PPO (ImPPO). Meanwhile, the alkaline stability of the membrane is enhanced due to the steric hindrance offered by CNTs, hydrophobic alkyl chain spacers for cationic functional groups, and the hybrid co-crosslinked network. The optimized interfacial compatibility between PPO-PImIL and PImIL@CNTs also endows the hybrid membranes with considerable tensile strength (26.7 MPa, almost 250% of the pristineImPPO) and thermal stability (higher than 200 °C). The hybrid co-crosslinked AEM (4 wt% of Br@CNTs relative to BrPPO was used) presents an outstanding fuel cell performance with a maximum power density of about 446 mW cm−2 and good durability of the single cell (0.76 mV h−1 of voltage decay rate). The excellent overall performance renders hybrid co-crosslinked AEMs a potential candidate for application in AEMFCs.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR PHARMACEUTICS
·
2016
·
IF 4.342
Kun Tian,Xu Jia,Xubo Zhao,Peng Liu
Anticancer drugs cause severe side effects on normal tissues and organs due to their nonspecific delivery. Thus, tumor-targeting delivery of anticancer drugs remains a serious challenge in chemotherapy. Here a facile strategy was established for the pH/reductant dual-responsive core-cross-linked (CCL) micelles for tumor-targeted delivery of anticancer drug, via in situ atom transfer radical polymerization (ATRP). In the in vitro controlled release experiments with doxorubicin (DOX) as a model drug, the premature drug leakage rate was only 13.4% in the physiological medium within 36 h, while the cumulative release rate in the stimulated tumor microenvironment reached 78.7%, demonstrating the excellent tumor microenvironment responsive controlled release behavior upon acidic medium with high GSH level. As a folate receptor (FR) mediated targeting drug delivery system (DDS), the micelles showed excellent cytocompatibility, and enhanced anticancer efficiency after loading of DOX, compared with free DOX.
研究领域:
药物递送系统
·
高分子化学
·
纳米医学
·
癌症治疗
·
刺激响应材料
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Tianheng Wang,Xiaoling Xu,Haisheng Zhang,Shaobin Wen,Liyuan Fan,Yanqiu Wang,Xinzhao Luo,Qiang Zhang,Yingquan Zou
Polyethylene is among the most widely-used coating materials due to the excellent physical and mechanical properties . However, the chemical inertness and poor solubility limit the application of polyethylene in coating. In this study, hyperbranched polyethylene-based graft copolymers containing functional oxetane groups (HBPE- g -POXMA) were synthesized via chain walking polymerization (CWP) and atom transfer radical polymerization (ATRP) in tandem. Macroinitiators were first synthesized via CWP of ethylene and trimethyl(undec-10-en-1-yloxy) silane following deprotection and esterification reaction. Subsequent ATRP of 3-ethyl-3-(methacryloyloxy) methyloxetane was performed to yield functional polyethylene with controlled molecular weight (MW), relatively narrow MW distribution, good solubility in organic solvents as well as pendant oxetane groups for photopolymerization . Finally, cationic photo-curing of HBPE- g -POXMA was conducted to build crosslinked polyethylene layers on polypropylene membrane surface. The composite membrane showed a narrow pore size distribution (0.03–0.63 μm) and an average pore size of merely 0.31 μm, which exhibited a retention ratio of over 90 % for different dyes. The strategy developed in this study could provide a synthetic route to hyperbranched polyethylene for functional coating via cationic photo-curing.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 27
·期 1
·469-480
·
IF 3.917
Zhang Kangmin,Wang Miaomiao,Wu Mingyuan,Wu Qingyun,Liu Jiuyi,Yang Jianjun,Zhang Jianan
Abstract Effective separation of oil and water has always been a long-term challenge. Here we introduce a facile and fluorine-free method to fabricate superhydrophobic and superoleophilic filter paper without the decoration of solid particles for robust oil/water separation. After chemically bonding octadecanoyl and α-bromoisobutyryl groups on the surface of filter paper through simultaneous esterification with stearoyl chloride and α-bromoisobutyryl bromide (BiBB) to obtain C18-FP-g-Br, superhydrophobic poly(styrene-co-acrylonitrile) (SAN) grafted filter paper (C18-FP-g-SAN) was fabricated via surface-initiated atom transfer radical polymerization. The obtained C18-FP-g-SAN showed a water contact angle of 153° and achieved a separation efficiency exceeding 98.5% after ten different typical oil/water separation processes due to the synergistically combined contributions of bonded octadecanoyl chain and grafted SAN. C18-FP-g-SAN remained high separation efficiency after 10 cycles of use and treatment with strong acidic or basic solution. The excellent reusability and chemical stability of C18-FP-g-SAN promise its practical applications of continuous oil/water separation and oil spillage cleanup. Graphic abstract
研究领域:
材料科学
·
界面化学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 91
·88490-88497
·
IF 3.289
Jirong Wang,Jianyu Han,Dan He,Haiyan Peng,Zhigang Xue,Xiaolin Xie
Different morphologies of elemental silver were employed as the reducing agent and polar solvents were used as both the solvent and ligand for the iron-catalyzed activators generated by electron transfer atom transfer radical polymerization (AGET ATRP) of methyl methacrylate. The polymerizations showed a high reaction rate and good control when silver nanowires with high surface area were used. The iron-catalyzed polymerizations of MMA were also processed at room temperature or even at 0 °C. Additionally, silver can act as a supplemental activator in the generation of radicals from the initiator, ethyl 2-bromo-2-phenylacetate, which may be the non-negligible reason for the deviated molecular weights.
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DOI
高影响因子
危险品化学品经营许可证（带存储）