JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·
IF 3.07
Shengliu Wang,Kai Yue,Lianying Liu,Wantai Yang
When dispersion polymerization of styrene (St) had run for 3 h, after particle rapidly growing stage, 4,4′-dimethacryloyloxybenzophenone (DMABP) cross-linker was added to reaction system and photoreactive, core(PSt)–shell(Poly(St- co -DMABP)) particles with rich benzophenone (BP) groups on surface were prepared. Polymerization of DMABP could occurred mainly on the preformed core of PSt because its diffusion could be impeded by (1) compactness of particles formed at the moment of cross-linker addition (more than 80% of monomer had been consumed, particles were no longer fully swollen by monomer), (2) reduced polarity of continuous phase, and (3) immediate occurrence of cross-linking. Subsequently, photoreactive, cross-linked hollow particles were yielded by removal of uncross-linked core in THF. SEM and TEM observation demonstrated the formation of core–shell structure and improvement of shell thickness when DMABP content increased. UV–vis spectra analysis on polymer dissolved in THF indicated that there is no polymer of DMABP in core. FTIR spectra analysis and XPS measurement further revealed that BP component on particle surface was enriched when amount of DMABP increased. Finally, an anti-fouling polymer (poly (ethylene glycol), PEG) and protein of mouse IgG was immobilized on particle surface under UV irradiation, as confirmed by FTIR spectra analysis, SEM observation and TMB color reaction.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Lili Ren,Dongyang Zhou,Jingjing Wang,Tao Zhang,Yinxian Peng,Guoguang Chen
The selection and preparation of materials is very important for the green treatment of wastewater. In our study, MnO 2 nanosheets were in-situ grown on biomass carbon microspheres (BCM) to format flower-like MnO 2 @carbon microspheres (CMn) adsorption composites. Amoxicillin (AMX) was adopted as model pollutant, and its adsorption was investigated as function of the contact time, AMX concentration, adsorbent dosage, and pH. The highest adsorption capacity of CMn was 16.094 mg/g in neutral medium. The adsorption isotherms were fitted using the Langmuir model. The kinetics of AMX adsorption was determined to follow the pseudo-first-order model. Recycle experiments indicated that CMn exhibited high adsorption efficiency (>80%) after four cycles. Therefore, the as-prepared CMn can be a promising material for removing pollutants form wastewater in the future.
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
POLYMER BULLETIN
·
2021
·Vol. 79
·期 6
·4323-4337
·
IF 2.87
Cao Mengjing,Cai Qiang,Guo Guangfan,Guo Hong,Chen Yingchao,Zhang Yuping
Polymer microsphere profile control is a promising approach for the profile control of heterogeneous reservoirs. Matching between polymer microspheres after swelling in water and the reservoir pore throat is crucial for profile control. Hydration equilibrium time and swelling ratio are key properties that are a direct result of water shutoff efficacy. In this paper, a hollow structure microsphere with swelling–deswelling properties is synthesized and its physical properties including morphology, particle size distribution, water swelling property and deswelling property are thoroughly examined. Meanwhile, the displacement performances are studied. The results demonstrate that the hollow structure microspheres have good swelling–deswelling properties at different salt concentrations. Compared with two kinds of polymer microspheres with the same material, the hydration equilibrium time of hollow structure microspheres is longer than that of nonhollow polymer microspheres. Moreover, the hollow structure microspheres have an effect on deep plugging. With the hydration time increasing, the tertiary recovery of the hollow structure microspheres solution is higher than that of nonhollow polymer microspheres solution, whether in a homogeneous medium or in a heterogeneous medium.
研究领域:
石油工程
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材料科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Hui Li,Huifang Xu,Baosheng Xu,Zhengxiang Zhong,Jing Jiang,Zhenfen Li,Shuo Wang,Haijiao Zhang
This work proposed a facile strategy to prepare glass/carbon composite hollow microspheres with intact shell and good thermal stability by in-situ depositing resorcinol-formaldehyde (RF) on hollow glass microspheres (HGS) and subsequently heat-treated at 800 °C. The structure formation of glass/RF composite hollow spheres were investigated and the results indicated that growth of RF colloid nanospheres on HGS was promoted by assistance of cetyltrimethylammonium bromide (CTAB). RF transformed into carbon via thermal pyrolysis to release CO 2 , H 2 O and CH 4 at inert atmosphere. Meanwhile, RF protected HGS from structure thermal deformation and the thermal stability of HGS was enhanced. Thus, shell structure of formed glass/carbon composite hollow microspheres was intact. This method avoided the traditional procedure to prepare template in prior and subsequently remove it. The obtained glass/carbon composite hollow microspheres with lightweight property and thermal stability would be potentially used as thermal insulator in the fields of thermal protection.
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
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2025
·
IF 2.9
Li Xin,Wan Xiangyu,Ma Qi-wen,Yu Guang-ning,Shi Ji,Chang Hai-yang,Zheng Rong-rong,Fan San-jun,Wang Cheng
The modulation of the morphological characteristics of hollow mesoporous silica microspheres (HMSMs) plays a crucial role in determining their properties and subsequent applications. In this study, emulsion polymerization was used to fabricate polystyrene microspheres (PSMs) as the primary templating agents. The HMSMs were then successfully synthesized by employing tetraethyl orthosilicate (TEOS) as the silica precursor, with electrostatic interactions driving the process. A range of characterization techniques, including Fourier Transform Infrared Spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET) surface area and porosity analysis, and Transmission Electron Microscopy (TEM), were employed to provide a comprehensive assessment of the PSMs and HMSMs, focusing on their size distribution, structural integrity, and functional properties. The results highlight the importance of the TEOS to PSMs mass ratio, with an optimal value of 0.75. This synthesis yielded HMSMs characterized by exceptional dispersibility and uniformity, with an average diameter of 336.33 nm and a shell thickness of 14.52 nm. Furthermore, the study elucidates the detailed mechanisms of morphological regulation during HMSMs synthesis, driven by the precise control of PSM, TEOS, and cetyltrimethylammonium bromide (CTAB) concentrations. Due to their unique porous structure, tunable pore size, large surface area, and excellent dispersibility, HMSMs show great potential for a wide range of applications, including drug delivery, catalysis, adsorption, and environmental remediation.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
FERROELECTRICS
·
2020
·
IF 0.669
Chen-Qi Zhang,Qiao-Hong Peng,Song Wang,Lin Guo,Hai-Lin Cong,You-Qing Shen,Bing Yu
High-performance liquid chromatography (HPLC) is one of the most widely used separations and analysis methods, which has become an indispensable part of the separation and detection of mixtures, qualitative and quantitative analysis and other scientific research and social production fields. Because of the decisive effect of the chromatographic column on analysis and separation, it has become the core of research in the chromatographic system. In the past decades, the research and development of new chromatographic column stationary phase have been highly concerned. Monodisperse polymer microsphere, because of its special large pore structure, has good permeability and high specific surface area, which can be used as special materials in various fields, such as adsorption materials in the separation process, HPLC column packing, catalyst carrier, preparation template of nanomaterials and nuclear fusion targeting materials. When it is used in HPLC, because of the good permeability of microspheres, it can effectively improve the separation efficiency and performance. In this article, based on the previous work, a number of new polymer microspheres were prepared, and the prepared microspheres were used for the separation and detection of HPLC, and their physical and chemical properties were studied.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 15
·2453
·
IF 4.329
Ri-si Wang,Ya Li,Xi-xiang Shuai,Rui-hong Liang,Jun Chen,Cheng-mei Liu
The development of effective heavy metal adsorbents has always been the goal of environmentalists. Pectin/activated carbon microspheres (P/ACs) were prepared through simple gelation without chemical crosslinking and utilized for adsorption of Pb2+. Scanning electron microscopy (SEM) revealed that the addition of activated carbon increased the porosity of the microsphere. Texture profile analysis showed good mechanical strength of P/ACs compared with original pectin microspheres. Kinetic studies found that the adsorption process followed a pseudo-second-order model, and the adsorption rate was controlled by film diffusion. Adsorption isotherms were described well by a Langmuir isotherm model, and the maximum adsorption capacity was estimated to be 279.33 mg/g. The P/ACs with the highest activated carbon (P/AC2:3) maintained a removal rate over 95.5% after 10 adsorption/desorption cycles. SEM-energy-dispersive X-ray spectrum and XPS analysis suggested a potential mechanism of adsorption are ion exchange between Pb2+and Ca2+, electronic adsorption, formation of complexes, and physical adsorption of P/ACs. All the above results indicated the P/ACs may be a good candidate for the adsorption of Pb2+.Keywords:pectin;activated carbon;microsphere;Pb2+;adsorption
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xiangchi Liu,Ailing Liu,Baijun Liu,Mingyao Zhang
Sustainable development has become an inevitable trend in the world’s green chemical industry for a generation or more. In this study, a monodisperse magnetic polystyrene mesoporous composite microsphere (MPPS) composed of Fe3O4 nanoparticles loaded on polystyrene mesoporous microspheres is introduced. These microspheres serve as effective adsorbents for the swift removal of cationic dyes. The fabrication of the wastewater adsorbent, with its simple operation and economic practicality, involved a combination of dispersion polymerization, a sulfonation reaction, two-step swelling polymerization, and in situ alkaline oxidation technology. Notably, the adsorption capacity within 3 min reaches 184.0 mg/g, with an impressive adsorption efficiency of 92%. This is primarily attributed to the high specific surface area (Smax) of the MPPS providing more reaction sites for π–π interaction. Simultaneously, the attractive force between negatively charged sulfonic acid groups and cationic dyes is enhanced through surface modification of the MPPS. Furthermore, the MPPS, boasting a maximum saturation magnetization of 38.19 emu/g, ensures rapid separation from the solution for recycling within 3 s. Even after 5 cycles, the adsorption efficiency remains over 90%. The rapid separation of dyes is facilitated by the magnetic attraction of Fe3O4 nanoparticles from the MPPS under the application of a magnetic field. These composite mesoporous materials exhibit outstanding performance in both efficient selective adsorption and recyclability, presenting a novel green adsorbent with promising prospects for sustainable development. This innovation is poised to excel in fields such as sewage treatment, separation, and purification.
研究领域:
材料科学
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环境科学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Juntao Gu,Shaojun Yuan,Wanting Shu,Wei Jiang,Shengwei Tang,Bin Liang,Simo Olavi Pehkonen
A novel pH-sensitive polystyrene (PS)-type resin was developed by grafting of poly(3-sulfopropyl methacrylate) (PSPMA) brushes onto a cross-linked poly(vinylbenzyl chloride) (PVBC) microsphere via surface-initiated atom transfer radical polymerization (ATRP), and was further utilized as a highly efficient and recyclable sorbent to remove Pb(II) ions from aqueous solutions. The as-synthesized PSPMA-grafted PVBC microspheres were characterized by ATR-FTIR, XPS and SEM. Batch adsorption results revealed that the solution pH had an evident effect on the adsorption capacity of the PSPMA-grafted microspheres towards Pb(II) ions with an optimal sorption pH of above 5.0. The PSPMA-grafted microspheres had rapid adsorption kinetics of Pb(II) ions to reach adsorption equilibrium within 60 min. The Langmuir-fitted adsorption isotherms at pH 5.0 with an initial Pb(II) concentration range of 0.12–0.97 mmol L −1 (i.e. 50–200 mg L −1 ) revealed a maximum capacity of Pb(II) ions of 0.82 mmol g −1 . The calculated thermodynamic parameters demonstrated an endothermic and spontaneous adsorption process of Pb(II) ions on the PSPMA-grafted microspheres. With the inherent stability, high adsorption capacity and good regenerability, the PSPMA-grafted PVBC microsphere resin provides a novel promising PS-type adsorbent for effective removal of heavy metal ions from aqueous solution.
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
E-POLYMERS
·
2020
·Vol. 20
·期 1
·69-75
·
IF 1.675
Haoran Yun,Xingxiang Zhang
Microspheres with phase change properties were fabricated by polymerization of hexadecyl acrylate (HA) and different cross-linking agents. The samples were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA). The results show that, the samples that added cross-linking agents have a smooth surface and the latent heat of them is different. The experiments show that all of the cross-linked copolymer shells can be made into temperature controlled release microspheres. These materials can be potentially applied in the field of thermal energy storage. β-tricalcium phosphate was encapsulated in microspheres to obtain one with a fast release effect. It will effectively promote bone conduction when these microspheres were implanted into a bone defect. This microsphere can be used for orthopedic implant or coating of instrument in the future.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 10
·
IF 1.866
Yuanyuan Liu,Xueqin Li,Yun Qin,Ruili Guo,Jianshu Zhang
Novel facilitated-transport mixed-matrix membrane (MMM) were prepared through the incorporation of polydopamine (PDA) microspheres into a poly(amide- b -ethylene oxide) (Pebax MH 1657) matrix to separate CO 2 –CH 4 gas mixtures. The Pebax–PDA microsphere MMMs were characterized by Fourier transform infrared spectroscopy, scanning electron microcopy, X-ray diffraction, differential scanning calorimetry, and thermogravimetric analysis. The PDA microspheres acted as an adhesive filler and generated strong interfacial interactions with the polymer matrix; this generated a polymer chain rigidification region near the polymer–filler interface. Polymer chain rigidification usually results in a larger resistance to the transport of gas with a larger molecular diameter and a higher CO 2 –CH 4 selectivity. In addition, the surface of PDA microspheres contained larger numbers of amine, imine, and catechol groups; these were beneficial to the improvement of the CO 2 separation performance. Compared with the pristine Pebax membrane, the MMM with a 5 wt % PDA microsphere loading displayed a higher gas permeability and selectivity; their CO 2 permeability and CO 2 –CH 4 selectivity were increased by 61 and 60%, respectively, and surpassed the 2008 Robeson upper bound line. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44564.
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
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 8
·1510-1519
·
IF 4.872
Chunbao Du,Xiaoling Hu,Ping Guan,Xumian Gao,Renyuan Song,Ji Li,Liwei Qian,Nan Zhang,Longxia Guo
Surface-imprinted microspheres were controllably synthesized using ionic liquid-functionalized microspheres with a highly cross-linked raspberry-like structure as the matrix via surface molecular self-assembly and precipitation polymerization in aqueous media at room temperature. An immunostimulating hexapeptide from human (IHH) with medical properties was chosen as a template molecule in the preparation of different molecularly imprinted microspheres (MIMs). The experiment process was tracked and the as-prepared microspheres were well characterized. Results reveal that the adsorption capacity and selective recognition of MIMs have a direct relationship with the properties of the functional chain of the ionic liquid-functionalized microspheres. Moreover, MIMs that have both high adsorption capacity and good selective recognition were used in competitive rebinding tests and analysis of urine samples, which demonstrated their potential use for IHH enrichment and in real samples.
研究领域:
生物医学工程
·
材料科学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）