COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Li Duan,Jinlong Fan,Guowei Chen,Pengju Qiu,Xiaoxue Zhang,Xiufang Zhai
A series of novel porous poly(ethylene glycol dimethacrylate) (PEGDMA) microspheres were prepared by utilizing different types of porogens, including toluene (TOL), cyclohexane (CYC), butyl acetate (BA) and di-n-octyl phthalate (DNOP). Their porous structure, specific surface area and particle size were systematically investigated. The SEM observation and the data derived from N 2 sorption showed that the PEGDMA microspheres using TOL or CYC as porogen had a very low BET surface area near zero. Whereas, the PEGDMA microspheres possessed obvious porous structure at both surface and inner when BA or DNOP were used as porogens. The microspheres using BA had significantly higher surface area, smaller pore diameter, narrower distribution of pore diameter, and larger particle size than the microspheres with DNOP under the same initial ratios of porogen to monomer. The mixed-porogen of BA and DNOP can also produce porous structure, but the addition of DNOP caused significantly larger pore size and lower specific surface area. The finally obtained PEGDMA microspheres using BA porogen were constructed of abundant micropores and mesopores with a high BET surface area. It is believed that the PEGDMA microspheres prepared in this work can be greatly in favor of the adsorption of metallic ions or small molecules.
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
THERMOCHIMICA ACTA
·
2012
·
IF 1.805
Xiaolin Qiu,Guolin Song,Xiaodong Chu,Xuezhu Li,Guoyi Tang
Microencapsulation of n -octadecane with crosslinked p(butyl methacrylate) (PBMA) and p(butyl acrylate) (PBA) as shells for thermal energy storage was carried out by a suspension-like polymerization. Divinylbenzene (DVB) and pentaerythritol triacrylate (PETA) were employed as crosslinking agents. The surface morphologies of the microencapsulated phase change materials (microPCMs) were studied by scanning electron microscopy (SEM). Thermal properties, thermal reliabilities and thermal stabilities of the as-prepared microPCMs were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The microPCMs prepared by using DVB exhibit greater heat capacities and higher thermal stabilities compared with those prepared by using PETA. The thermal resistant temperature of the microPCM with BMA–DVB polymer was up to 248 °C. The phase change temperatures and latent heats of all the as-prepared microcapsules varied little after 1000 thermal cycles.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2018
·Vol. 25
·期 2
·101-109
·
IF 0
Yuan Caideng,Zhang Lei,Li Haichao,Guo Ruiwei,Zhao Meng,Yang Lan
In this study, we prepared and applied polymeric porous microsphere adsorbents with selectivity for Li + extraction from aqueous solution. We synthesized the adsorbents by suspension polymerization using methacryloyoxyme-12-crown-4 (M12C4) as a functional monomer, which had been synthesized from 2-hyroxymethyl-12-crown-4 and methacryloyl chloride. We verified the chemical composition by solid nuclear magnetic resonance ( 13 C-NMR) spectroscopy and observed the porous structure by scanning electron microscopy (SEM). We conducted adsorption isothermal and kinetic tests to determine the adsorption properties. It was found that the adsorbents showed high adsorption efficiency and an adsorption equilibrium time of 200 min. In addition, since the crown ether used in this work could form a stable complex with Li + , we observed good selectivity for Li + in the prepared solution compared with other ions such as Na + , K + , Mg 2+ , and Ca 2+ . We reused the adsorbents five times with no significant decrease in adsorptive capacity.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
JOURNAL OF APPLIED POLYMER SCIENCE
·
2011
·Vol. 123
·期 6
·3255-3260
·
IF 1.24
Hongbo Liu,Shaoguo Wen,Jihu Wang,Yu Zhu
Composite particles of carbon black-polystyrene with controllable size were successfully prepared using high-speed homogenization-assisted suspension polymerization. The carbon black particles were modified by oleic acid to make it more hydrophobic and more compatible with polymers before the encapsulation process. The effects of homogenization speed, homogenization time, agitation speed, pigment concentration, and stabilizer concentration on the properties of complex spheres were investigated in detail. The results of orthogonal experiments proved that the stabilizer concentration plays the most important role in controlling the size of complex particles. The particles were also characterized by FTIR and SEM. SEM photographs proved that the complex particles had good spherical forms with smooth surfaces. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 4
·49734
·
IF 2.52
Qirui Yi,Jingyu Li,Runhua Zhang,Erni Ma,Ru Liu
Small particle diameter thermally expandable microspheres (TEMs) were obtained for potential utilization in wood, with special attention on their particle diameters and expansion properties. The revolving speed of homogenization (RS) of 800 ~ 3000 r min −1 was applied in suspension polymerization under atmospheric pressure to prepare TEMs, with n -hexane as core material and the copolymer of acrylonitrile, methyl acrylate, and vinyl acetate as shell. (a) The effect of the RS on the particle diameters of TEMs presented a negative correlation at low RS and remained stable at high RS, (b) When the RS was 1900 ~ 2100 r min −1 , the optimized TEMs with average particle diameters of 3.82 ~ 4.06 μm were prepared, possessing expansion ratios of 3.4 ~ 4.3 and an expansion temperature of 112°C, (c)The optimized TEMs had core-shell structure and high encapsulated content of alkane, and (d) The TEMs with small particle diameters could be impregnated into wood and expand successfully in wood cell lumens.
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Jian Huang,ZiQi Zhao,Tiao Chen,Yang Zhu,ZhengHang Lv,Xiao Gong,YunYa Niu,BaoGuo Ma
Expandable graphite (EG) is a common carbon-based fire retardant material. However, its low compatibility and tendency of agglomeration in polymeric material limit its application and potential efficiency. In this paper, polystyrene (PS) was applied as non-covalent compatiblizer for EG to disperse in styrene (St) through suspension polymerization . With appropriate pretreatments of EG and optimization of suspension polymerization conditions, EG was “pulled” and dispersed in oil phase by pre-dissolving PS itself in its monomer . Both glass transition temperature and temperature at maximum weight loss rate of the polymerized EG-PS composite increased, suggesting PS molecules were non-covalently attracted onto EG and confined. The EG-PS foam also maintained well dispersed EG particles, and have a more uniformed foam cell structure than the uncompatibled EG-PS as revealed by microscope and micro-CT. The foam reached V-0 rating in UL94 test. Limited oxidation index (LOI) of the foam increased from 18.2% to 31.3% and flame spreading speed was significantly inhibited to 25 times slower as measured in the test, in comparison to commercial Expandable Polystyrene (EPS). Effective reduction of heat release and suppression of smoke were confirmed by cone calorimeter , comprehensively showing EG as an intercalated graphite material alone could be effective retardant for styrenic foam.
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Changtong Song,Xianhong Zhang,Yuhong Ma,Wantai Yang
Developing internal-plasticized poly(vinyl chloride) (PVC) resin has been recognized as an effective way to deal with the issues of conventional PVC products such as toxicity and deterioration in properties caused by the migration of plasticizer . Herein, the copolymerization of vinyl chloride with commercial available poly(ethylene glycol) monomethyl ether methacrylate (PEGMA) is firstly conducted via suspension polymerization and internally plasticized random copolymers (PVEGA) are synthesized successfully. These PVEGA copolymers were intensively characterized by FTIR, 1 H NMR, GPC , DSC, DMTA , and SEM to determine the composition , number-average molecular weight ( M n ), dispersity, glass transition temperature ( T g ), and the micromorphology. As a result, the high transparency and the fracture images demonstrated the good compatability between PVC chains with long-chain polyether . The T g of PVEGA decreased gradually from 80 to 0 °C with the fraction of PEGMA in the copolymer increased from 7 to 37 %. Furthermore, the PVEGA copolymer exhibits outstanding processibility and mechanical performance. Under optimal composition , the tensile strength and the elongation at break can reach to 8 MPa and 525 %, respectively. Meanwhile, the PVEGA copolymers exhibit much lower migration either in water or in orgnic solvent and excellent performance in hemolysis and cytotoxicity, showing great application potential in medical devices .
研究领域:
材料科学
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化学工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 7
·e53487
·
IF 3.057
Huan Wei,Haihang Luo,Jing Li,Haojun Fan,Jun Xiang,Yi Chen,Jun Yan
A large size, sensitive response thermally expandable microspheres (TEMs) for suede-like leather manufacture was prepared by suspension polymerization using acrylonitrile (AN), methyl methacrylate (MMA) and vinyl acetate (VAC) as the shell monomers and iso-pentane as the foaming component. The effect of the interfacial tension and viscosity of polymerization system on the particle size of TEMs, and in turn, the effect of the particle size of TEMs on the expansion temperature, expansion ratio and thermal response performance were investigated in detail. The results showed that increasing the interface tension and viscosity of the polymerization system was beneficial for preparing large size TEMs. Under the optimized conditions of 300 rpm, 25 wt% iso-pentane dosage, and 9:3:1 mass ratio of AN/MAA/VAC, the TEMs shown above 100 μm particle size and 4 times expansion ratio at 150°C. Moreover, TEMs with 18% encapsulation ratio ( E r ) of the foaming component can complete foaming in the narrow temperature range (Δ T ≤ 10°C), showing a sensitive thermal response. The mixture of waterborne polyurethane and quantitative TEMs was coated on the surface of synthetic leather base, and a new type of suede-like leather was obtained after foaming, which can substitute genuine suede leather.
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
POLYMER
·
2025
·
IF 4.5
Jingjing Ren,Li An,Siqiao Zhang,Ran Mo,Fanghua Pan,Yuwei Hao,Zhiqing Xin,Zhicheng Sun
A novel type of photochromic thermally expandable microcapsules (PTEMs) were prepared through suspension polymerization. The shell material of the microcapsules consisted of acrylonitrile (AN), methyl methacrylate (MMA), and methyl acrylate (MA). The core material utilized n-hexane as a foaming agent containing photochromic dye (spiropyran). On the basis of the preparation, the investigation further focused on the chemical structure, surface morphology, particle size, color-changing ability, and thermal expansion of the microcapsules. Additionally, the PTEMs were used in water-based inks with good compatibility and for screen printing to obtain patterns. Meanwhile, the color changeability of the printed samples was evaluated using a portable colorimeter. Eventually, the results demonstrated that the printed products exhibited excellent color change and thermal expansion capabilities. In future, the PTEMs will have the potential to develop water-based ink applications in anti-counterfeiting and smart packaging.
研究领域:
材料科学
·
化学工程
·
印刷技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 3
·257
·
IF 4.9
Shoulian Wei,Shenwei Huang,Jun Zhou,Chun Xiao,Jiangfei Cao,Jibo Xiao,Chunsheng Xie
In this study, magnetic carbon nanopolymers (Fe3O4/C@PM) were synthesized by suspension polymerization using magnetic carbon nanoparticles as the matrix, 2-thiophene formaldehyde and acrylamide as the monomers, and ethylene glycol dimethacrylate (EGDMA) as the crosslinking agent. The obtained material was characterized using multiple techniques, including scanning electron microscopy (SEM), infrared spectroscopy (FTIR), X-ray diffraction (XRD), N2adsorption–desorption, and thermogravimetric analysis (TGA). The adsorption effects of Zn2+, Cd2+, and Pb2+in the mixed solution were evaluated using magnetic carbon nanoparticles (Fe3O4/C) and Fe3O4/C@PM as adsorbents. The adsorption isotherms, kinetic models, and cyclic regeneration of various metal ions, including Zn2+, Cd2+and Pb2+, were studied. The results showed that the Fe3O4/C@PM maintained a slightly aggregated spherical morphology similar to Fe3O4/C and exhibited excellent adsorption capacity for all of Zn2+, Cd2+, and Pb2+, with maximum adsorption capacities of 343.3, 250.7, and 177.6 mg·g−1, respectively. The adsorption mechanisms were mainly based on the chemical interactions between metal ions and functional groups on the surface of polymers. The kinetic study revealed that the adsorption process followed a pseudo-second-order kinetic model. When Fe3O4/C@PM was reused five times, its adsorption rates for Zn2+, Cd2+, and Pb2+remained above 81%, indicating its great potential for the treatment of wastewater containing Zn2+, Cd2+, and Pb2+.
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
·
2011
·
IF 4.269
Tao Zhao,Dong Qiu
A facile method of preparing highly folded cross-linked polymeric microparticles has been developed via one-pot suspension polymerization under high-speed homogenization. The wrinkles result from the evaporation of solvent in the cross-linked microparticles. The effects of microparticle cross-linking density and solvent on the polymer have been studied in detail. It was found that a medium cross-linking density (DVB/St = 0.5 by weight) is optimal for producing the most folded surface and the higher the solvent content, the deeper the surface wrinkles. This method is very simple and in principle can be applied to produce wrinkled microparticles with other chemical compositions.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2011
·Vol. 60
·期 9
·1287-1290
·
IF 2.056
Qingquan Liu,Yingxiang Duan,Shaohua Shen,Zhihua Zhou
Pomegranate-like polystyrene-based microspheres with high porosity were successfully prepared via a simple route involving two steps. The first step was the preparation of polystyrene-based microspheres with multi-cores and a non-porous shell via suspension polymerization of divinylbenzene and vinylbenzyl chloride. Nitrogen sorption failed to characterize the pore structure of the microspheres because of the non-porous shell, but the results of Hg intrusion indicated that the pore volume of the microspheres was 0.36 cm 3 g −1 . The second step was post crosslinking of the microspheres derived from the first step. Extensive porosity was generated in the shell and the pomegranate-like structure of the microspheres remained almost unchanged. The results showed that the pore volumes of the final products derived from N 2 sorption and Hg intrusion were 0.54 cm 3 g −1 and 0.66 cm 3 g −1 , respectively. Overall, this provides a simple and feasible route to biomimetic preparation of pomegranate-like polystyrene-based microspheres with high porosity. Copyright © 2011 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）