CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Heqin Huang,Yuanyuan Ding,Xilu Chen,Zhiyong Chen,Xiang Zheng Kong
A facile method was proposed to produce monodisperse poly(divinylbenzene) microspheres in a quiescent mode by means of a combination of solvothermal process and classical precipitation polymerization. Spherical particles were obtained using this method at a monomer concentration of 20 wt%, with respective to the solvent, that was 2–4 folds higher than that in traditional precipitation polymerization. The diameter of monodisperse microspheres could be controlled in the range of 0.88–4.18 μm by adjusting reaction conditions. When the reaction temperature was optimized between 85 °C and 100 °C, above the boiling point of the solvent, i.e. acetonitrile, the yield of microspheres reached 93.7% within 4 h of polymerization with a narrowed polydispersity index of 1.033. The uniformity of the microspheres was improved by adjusting initiator concentration. This polymerization strategy with high efficiency is of potential in fabrication of various monodisperse microspheres.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 8
·872
·
IF 2.935
Yongxian Zhao,Chen Ma,Shijie Cheng,Wei Xu,Yuejuan Du,Yansong Bao,Zuojie Xiao
Maleic anhydride (MAH)–divinyl benzene (DVB) multi-monomer melt-grafting onto isotactic polybutene-1 (iPB-1) was carried out in a torque rheometer. The effects of dicumyl peroxide (DCP), MAH, and DVB concentrations, and temperature, on the reaction, were investigated. The optimized conditions were 170 °C, DVB/MAH = 4:6 (mass ratio). DVB as a comonomer enhanced the grafting degree (Gd) and grafting efficiency (Ge) of iPB-g-MAH better than styrene. The initiator DCP had little effect on Gd as its concentration over 0.2 phr, but the grafts’ melt flow rate (MFR) increased significantly, and relative molecular weight decreased remarkably with increased DCP concentration. With increasing Gd, the contact angle of grafts with water decreased, and there was a larger crystallization rate. The study of iPB-1 and iPB-g-MAH (Gd = 1.5%)-modified polyamide 6 (PA6) showed that iPB-g-MAH had an obviously toughening effect on PA6. With increasing iPB-g-MAH concentration, the blends of impact strength and elongation at break increased obviously, tensile strength decreased slightly, and MFR decreased prominently, which greatly slowed the processing degradation of PA6. The properties of iPB-1/PA6 blends deteriorated. Both DSC curves and SEM micrographs confirmed that PA6/iPB-g-MAH blends had much better compatibility than PA6/iPB. The reason was that the anhydride group in iPB-g-MAH reacted with amide group in PA6 to improve the compatibility between two phases, and iPB-g-MAH is an excellent modifier for PA6.Keywords:isotactic polybutene-1;maleic anhydride;divinyl benzene;polyamide 6;modification
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 3
·46979
·
IF 1.901
Yuanbo Cai,Wu Yan,Xuesong Peng,Mei Liang,Lin Yu,Huawei Zou
In this work, the acrylonitrile (AN)-styrene (St)-divinylbenzene (DVB) resin was synthesized via suspension polymerization in the presence of inert porogens as diluent. The relationship of the solubility parameter (SP) of the materials and the porous properties of the resin was investigated. These porous spherical resin particles (0.25–0.84 mm) can be used as precursors of amidoxime resin which has a high metal ion chelating efficiency. The results showed that the porous properties (surface area and mean pore width) of the resin changed with variation in the compatibility between monomers and porogens. According to the the BET theory to N 2 sorption and scanning electron microscopy (SEM), the specific surface area of the obtained beads was strongly dependent on the compatibility of the components of the system and achieved values from 3.3 to 66.8 m 2 /g. The surface area of the terpolymer beads was found to rise with a decrease in the content of acrylonitrile or an increase in the SP of the porogens. However, the variation of the pore size was just the opposite. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46979.
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 MEMBRANE SCIENCE
·
2024
·
IF 8.4
Man Chen,Zhe Wang,Shijia Weng,Junkan Yue,Zirui Wang,He Zhang,Zhenxu Huang,Xinda You,Runlai Li,Qiang Fu
The increasing release of oily wastewater from both household and industrial activities has led to a significant environmental challenge. Among the various methods for treating oil-water mixtures, membranes with specialized wettability characteristics have emerged as one of the most effective and cost-efficient approaches. In this field, reducing the thickness of membranes is a key strategy to lessen resistance to mass transfer. This paper describes the creation of a super-hydrophobic, submicron-thin (945 nm) and even transparent (79.99% relative transparency at 600 nm wavelength) composite membrane for oil/water separation. This was achieved by depositing polydivinylbenzene (PDVB) onto ∼170 nm ultrathin freestanding polyethylene (PE) membranes to form hierarchical rough textures. Based on the super-hydrophobicity and high roughness, PE/PDVB composite membrane is enabled to separate oil from water in both mixtures and emulsions of immiscible oil/water. Moreover, PE/PDVB demonstrated a separation efficiency exceeding 99.91% for various water-in-oil emulsions. Impressively, this efficiency could be sustained above 99.87% even after 30 cycles of separation involving surfactant-stabilized isooctane/water emulsions. This performance robustness persisted against various chemical environments such as acidic, alkaline, and saline conditions over prolonged periods. To our knowledge, PE/PDVB is currently the thinnest oil/water purification membrane available, combining both an active layer and support. This work also highlights the practicality of using an ultra-thin support layer for efficient oil/water separation. This work may be at use for membrane scientists who are developing ultra-thin membrane materials and processes for future applications.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 18
·1-15
·
IF 2.8
Shi Haofan,Li Jinping,Zhang Gaoming,Meng Songhe
SiCN ceramic is a candidate material for high-temperature sensors because of its stability and semiconductor characteristics at high temperatures. The free carbon content within the SiCN ceramics is a main factor that affects its conductivity. This study adjusted the free carbon content inside amorphous SiCN by adding divinylbenzene into the precursor. The electrical properties of SiCN ceramics with different free carbon contents were explored using ultraviolet fluorescence spectrum and temperature-resistant experiments. The results showed that with the increase of divinylbenzene from 0 to 20%, the conductivity of SiCN ceramics at room temperature increases from 2.77 × 10 −9 to 3.66 × 10 −4 S/cm, and the forbidden bandwidth decreases from 3.81 to 2.25 eV. At the same time, the increase of divinylbenzene content would promote the hybridization extent of free carbon from sp 3 to sp 2 and improve the degree of order. This work could pave the way for applying amorphous SiCN serving as temperature sensors.
研究领域:
材料科学
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半导体材料
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产品关联
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2015
·Vol. 33
·期 1
·312-318
·
IF 1.166
Wang Ye,Li Guobing,Chen Song,Si Rongshuang,Fan Jiangyang
Monodisperse micron-size poly(styrene-co-divinylbenzene) (PST-DVB) microspheres were successfully prepared by vibration dispersion. A vibrator was used to generate a controlled vibration to jet from a single nozzle of 200 µm to produce uniform droplets. The effects of variations in selected process parameters upon the droplets formation and the diameter of the microspheres were investigated. It was demonstrated that changes in the velocity of oil phase, drive frequency and destabilization amplitude have significant effects on the formation of uniform droplets and the average diameter of the microspheres. Rational polynomial regression equations of the above parameters were established. Based on these equations, we could calculate the operation conditions to produce uniform droplets with the desirable diameter.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
LANGMUIR
·
2016
·
IF 3.993
Zefeng Wang,Weiwei Ye,Xinran Luo,Zhonggang Wang
Highly cross-linked poly(divinylbenzene) (PDVB) spherical colloidal particles with nano-, submicron-, and micron-sizes of 157.2 nm, 602.1 nm, and 5.1 μm were synthesized through emulsion and dispersion polymerization methods. The influences of particle size on the surface morphology, roughness, superhydrophobicity, and critical cracking thickness of colloidal films were studied in detail. The results show that PDVB colloidal films possess large water contact angle (CA) over 151°, belonging to superhydrophobic materials. Moreover, it is interesting to observe that the highly cross-linked network structure leads to PDVB film’s excellent heat-resistance. The CA and rough surface morphology remain nearly unchanged after thermal-treatment of films at 150 °C for 24 h. In addition, no cracks were observed in films with thicknesses up to 8.1 μm, exceeding most of polymer and inorganic particle films reported in the literature. The simple and scalable preparation method, low-cost, superhydrophobicity, and excellent thermal stability endow the PDVB colloidal films with promising applications in advanced coating fields, especially when employed in the high-temperature service environment.
研究领域:
材料科学
·
表面化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 23
·22911-22919
·
IF 2.8
Zhu Xiaobiao,Tian Ye,Li Feifei,Liu Yapeng,Wang Xiaohui,Hu Xiang
Superhydrophobic materials have an excellent performance in oil adsorption. In this study, a novel magnetic polydivinylbenzene (PDVB) nanofiber was synthesized by the method of cation polymerization to adsorb oil from water. The magnetic PDVB was hollow nanofiber with Fe 3 O 4 nanoparticles embedded in its structure. The synthesis condition was optimized that the ratio of divinylbenzene (DVB) to boron fluoride ethyl ether (BFEE) was 10:1 ( v / v ), and the Fe 3 O 4 dosage was 0.175 g/g of DVB. The material showed an excellent oil adsorption performance in wastewater, and the oil concentration could be reduced from 2000 to 92.2 mg/L within 5 min. The magnetic PDVB had relatively high adsorption capacity (12 g/g) for oil, which could be attributed to its super hydrophobicity and one-dimensional nanostructure with high crosslinking degree. The isotherm study indicated that the magnetic PDVB adsorbed oil was an asymmetric or multilayer adsorption process. The material could be regenerated by simple squeeze and maintain its adsorption capacity after it has been used for 10 recycles. In real coking wastewater, the magnetic PDVB kept a good oil adsorption performance without the interference of various pollutants, indicating a wide prospect in practical use.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 11
·5240-5251
·
IF 2.302
Yu Bing,Tian Chao,Cong Hailin,Xu Tao
Monodisperse poly(styrene- co -divinylbenzene) (PS-DVB) microspheres with binary porous structures were synthesized using a modified seeded polymerization method. The microspheres had small pores on the surface and big pores in the middle. Using the binary porous PS-DVB (BPPSD) microspheres as packing materials for high-performance liquid chromatography, several benzene analogs were effectively separated in a column as short as 75 mm due to the high surface areas of the stationary phase. Because of the π–π affinity interaction between BPPSD particles and analytes, the separation performance of the BPPSD column was better than commercialized C 18 column at the same conditions. Compared to column filled with non-porous PS-DVB particles, the back pressure of BPPSD column could be maintained at especially low level even at high flow rates due to the excellent permeability of the fillers. In addition, approximate baseline separation of C 60 and C 70 was also achieved in the 75 mm BPPSD column.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.718
Rui Feng,Xin Hu,Yuxin Ma,Liping Sun,Yaying Lv,Kyung Ho Row,Tao Zhu
PS-DVB-TiO2 modifying with amino (polyethyleneimine or polyaniline) were synthesized, and they were characterized by scanning electron microscopy, fourier transform infrared spectroscopy, thermogravimetric analysis, and Brunauer Emmett Teller. The obtained polymers were used for purification of myricetin and quercetin from Epipremnum aureum rhizome by pipette-tip solid-phase extraction. The satisfactory extraction recoveries for the two targets (myricetin 86.39% and quercetin 83.67%) were obtained by changing different washing and eluted solvents. The result showed that the obtained modified PS-DVB exhibited high mechanical strength and special selectivity to the targets, and the proposed method was successfully applied for purifying complex samples with PT-SPE.Abbreviation PS-DVB: poly (styrene-divinylbenzene); PEI: polyethyleneimine; PANI: polyaniline; SPE: solid-phase extraction; MIP-SPE: molecularly imprinted solid-phase extraction; UAE: ultrasound-assisted extraction; MSPD: molecularly imprinted-matrix solid phase dispersion; PT-SPE: Pipette-tip solid-phase extraction; DMF: N, N-Dimethylformamide; SEM: scanning electron microscopy; TGA: thermogravimetric analysis; FT-IR: fourier transform infrared spectroscopy; BET: Brunauer Emmett Teller.
研究领域:
分析化学
·
天然产物化学
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产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 4
·2861-2872
·
IF 3.917
Cheng Quan-Yong,Guan Cheng-Shu,Li Yi-Dong,Zhu Jiang,Zeng Jian-Bing
Traditional superhydrophobic cotton fabrics (CF) demonstrate various advantages such as self-cleaning, water repelling and efficient oil/water separation capacity but limited practical applications due to their poor mechanical robustness and environmental durability. In this work, robust and durable superhydrophobic polydivinylbenzene (PDVB) coated CF (PDVB@CF) are fabricated via a simple one-step, fluorine-free, and inorganic nanoparticle-free solvothermal method. The PDVB@CF displays excellent chemical resistance without losing superhydrophobicity after immersing in various organic solvents, strong acid and alkali solutions for a long time. The PDVB@CF shows excellent mechanical robustness to resist sandpaper abrasion and ultrasonication treatment. Furthermore, the PDVB@CF exhibits outstanding high and low temperature resistances since the contact angle of either acidic or alkali droplets is greater than 150° after isothermal treatment at 200 °C or immersion in liquid nitrogen for 3 h. The PDVB@CF is very efficient in separating water mixtures with various oily compounds with separation efficiency of higher than 98% and flux up to 56 k L m −2 h −1 depending on characteristics of the oils. In addition, the PDVB@CF shows excellent recyclability with superhydrophobicity and separation efficiency that remained after 10 separation cycles. The PDVB@CF with excellent robustness and durability exhibits potential utility in oil/water separation even under some harsh conditions.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Ronglin Mou,Xinji Wang,Ziqing Wang,Daoyou Zhang,Zhili Yin,Yin Lv,Zhong Wei
The transformation of glycerol into high value-added derivatives has been of critical importance from the viewpoint of sustainable production of biodiesel. Among the reported processes, selective esterification of glycerol with acetic acid to a fuel bioadditive, including glycerol diacetate (DAG) and glycerol triacetate (TAG), is a research hot topic in both academic research and industrial application. In this work, a series of polydivinylbenzene-based solid acids (PDS) with different structural performances were prepared by a hydrothermal synthesis method and employed as catalysts for the acetylation of glycerol with acetic acid to DAG and TAG. The effects of PDS structure properties on the catalytic performance are discussed in detail with the help of various characterizations. PDS-THF prepared in tetrahydrofuran solvent was proven to be the most active catalyst among all the tested samples. In addition, glycerol could be almost completely converted into glyceryl acetates in the presence of PDS-THF, with a combined selectivity to DAG and TAG of 88.6% at its optimization condition. No obvious deactivation can be observed for PDS-THF after five runs, and the synergism of abundant acidic sites, suitable acidic site density and super hydrophobicity can account for its superior catalytic performance.
研究领域:
化学工程
·
催化材料
·
可再生资源利用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）