JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 16
·48594
·
IF 2.188
Rui Wang,Yao Xiao
In this study, we prepared monosultap microcapsules in an inverse emulsion through interfacial polymerization for the first time. The microcapsules are spherical pellets with intact and smooth shell and have a narrow particle size distribution with an average size of about 2.35 μm. More importantly, our microcapsules have excellent thermal stability with a starting decomposition temperature of 233.1 °C, high encapsulation efficiency of 81.9% as well as long-term slow release of monosultap under different conditions. In addition, the shell of the microcapsules can degrade completely in the natural condition, avoiding the pollution to the environment. It can be believed that our microcapsules will show good service performance if employed in agricultural industry. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48594.
研究领域:
材料科学
·
农业科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
·
IF 3.8
Ye Zhang,Eryun Yan,Qiaomei Chen,Li Zhao,Yiming Wang,Jinjun Deng,Huili Zhang,Hongsheng Liu
The alkyl chain length of hydrophobic monomers significantly influences the properties of hydrophobic associative polymers. In this study, four hydrophobic monomers with varying chain lengths were copolymerized with acrylamide, using the inverse emulsion polymerization method. Four hydrophobic associative polyacrylamides were successfully synthesized and characterized using infrared spectroscopy, nuclear magnetic resonance (NMR), and radius of gyration detection, and they were compared with polyacrylamides (PAMs) (without hydrophobic monomers). Polymer morphology was analyzed using scanning electron microscopy, while rheological properties were assessed using a rheometer. Emulsion stability was determined by measuring conductivity. Investigation indicate a direct correlation between the rheological properties of the polymer and the stability of the emulsion with the alkyl chain length of the hydrophobic monomer. The longer the alkyl chain of the hydrophobic monomer, the higher the rheology and emulsion stability of the polymer by increasing hydrophobic association and droplet encapsulation.
研究领域:
高分子化学
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石油工程
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DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Yufeng Sun,Fei Qu,Rui Geng,Wanyue Xiao,Duohang Bi,Bijin Xiong,Yijing Liu,Jintao Zhu,Xiaoyuan Chen
The precise control of the assembly structure and size of gold nanoclusters (AuNCs) can potentially amplify their near-infrared II (NIR-II) fluorescence imaging and targeting properties. However, the conventional electrostatic assembly of AuNCs and charged molecules faces challenges in balancing the inherent electrostatic repulsions among charged units and regulating the diffusion of assembly units. These difficulties limit precise control over assembly size and structure, along with limited options for coassembled molecules, thereby restricting imaging properties and targeting capability. To circumvent this challenge, we developed a reverse emulsion-confined electrostatic assembly method. This technique efficiently constructs AuNC nanoassemblies with diverse coassembled molecules, allowing for the fine-tuning of assembly size and structure, including both core–satellite and homogeneous AuNC nanoassemblies. The development of two distinct nanoassemblies can be partially attributed to the varying diffusive rates of AuNCs or the AuNCs/polymer complex within the fused emulsion droplets. This variance arises from steric hindrances encountered during the emulsion fusion process. Interestingly, core–satellite nanoassemblies exhibit the strongest NIR-II fluorescence enhancement. Finally, the introduction of a hyaluronic acid coating on the surfaces of nanoassemblies with varying sizes enables the nanoprobes to achieve enhanced lymph node imaging through size modulation and macrophage targeting, which are used for surgical navigation to remove lymph node metastases. We envision that this self-assembly strategy can be extended to a wide range of electrostatic assembly systems for the development of multicomponent functional materials.
研究领域:
生物医学工程
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纳米医学
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分子影像学
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DOI
PubMed
高影响因子
BMC Chemistry
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2025
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IF 4.6
Qiming Zheng,Chenming Peng,Wei Qian,Xin Wang,Defeng Wang,Kairui Yang
This investigation developed and evaluated a new type of high-temperature-resistant gel particle system (DPAG), which is specifically designed for conformance control in high-temperature reservoirs. Conventional conformance control systems, including polymer gel systems and foam-based technologies, often suffer from thermal degradation and insufficient plugging stability under high-temperature environments. To address these limitations, DPAG gel particles were synthesized via inverse emulsion polymerization, incorporating thermally stable functional monomers (AMPS and DAC) to create a dual-crosslinking network combining covalent bonds and electrostatic interactions. A comprehensive characterization combining chemical structure assessment, particle size measurement and microscopic morphology examination confirmed the successful synthesis of DPAG gel particles, revealing their uniform size distribution and well-defined morphology. Thermodynamic stability analysis, combined with rheological characterization, revealed that DPAG gel particles exhibit enhanced structural integrity, thermal resistance, and mechanical strength compared to conventional AM gel particles. Swelling kinetic studies revealed that DPAG gel particles exhibit significantly enhanced swelling characteristics, achieved a swelling ratio of 14.6. Experimental results indicated that DPAG microsphere dispersions at concentrations of 0.1% to 0.5% not only maintained excellent injectivity but also achieved remarkable plugging efficiency, reaching up to 98.7%. Particularly under high-temperature conditions, DPAG gel particles displayed outstanding stability, retaining excellent mechanical properties after 30 days with less than 17.4% strength loss. Core flooding experiments demonstrated that DPAG gel particles exhibit both deep migration capability and long-term stability in high-temperature reservoirs, ultimately enhancing oil recovery by 22.4%. These findings strongly indicate the significant potential of DPAG gel particles for well conformance control in high-temperature oilfields.
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DOI
PubMed
高影响因子
MATERIALS RESEARCH INNOVATIONS
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2025
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IF 0
Yu Tian,Feiyao Huang,Di Zhu,Li Jiang,Qimin Jiang,Hongjun Yang,Wenyan Huang,Xiaoqiang Xue,Bibiao Jiang
The branched poly (2-hydroxyethyl methacrylate)(BPHEMA) was carried out using 2-methyl-n-[3-(methyl phenyl amino)-propyl]–acrylamide(MPAEMA, synthesised in laboratory) and benzoyl peroxide(BPO) as redox initiator by water/toluene inverse emulsion polymerisation. The weight-average molecular weight (Mw.MALLS), mean-square radius of gyration(Rg), intrinsic viscosity([η]), relative branching factor g and g’, and micro rheological properties of BPHEMA were measured by static and dynamic light scattering(DLS-SLS) and Ubbelohde viscometer. The results show that the BPHEMA was synthesised by inverse emulsion polymerisation at room temperature. The degree of branching increased with the increase of the content of reducing agent MPAEMA in the feed ratio, and the molecular weight was not affected significantly by the change of feed ratio. However, the molecular weight of linear poly (2-hydroxyethyl methacrylate) (LPHEMA) was significantly affected by the change of feed ratio.
研究领域:
高分子化学
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材料科学
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物理化学
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DOI
Polymers
·
2018
·Vol. 10
·期 10
·1158
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IF 2.935
Jiping Wang,Yongbo Zhang,Huashu Dou,Liujun Pei
Silicone reverse dyeing technology provides an important means of saving water and salts-free in the textile dyeing industry. The interactions between dyes and surfactants may influence the hydrolysis of dye during dyeing. In this investigation, the effect of ethylene oxide content in nonionic surfactant on the hydrolytic reaction of reactive dye was firstly investigated in a siloxane reverse emulsion dyeing system. Compared with no surfactants, the hydrolytic reaction of vinyl sulfone reactive dye was a slowdown when some nonionic surfactants were used during dyeing. Usually, the hydrophobic groups in nonionic surfactants were dodecyl chains but their polar head groups were different. The hydrolytic reaction of vinyl sulfone dye showed that the longer of EO (ethylene oxide) chains, the faster the hydrolytic reaction of vinyl sulfone dye. From the absorption spectrum of dye, it could be concluded that more of dyes would be solubilized into the formed micelles, and dye-surfactant complexes were adhered to the surface of micelles if the molecular structure of surfactant had a shorter EO chains. Furthermore, the intramolecular or intermolecular hydrogen bond could be formed between dye and surfactant, which would further influence the hydrolytic reaction of vinyl sulfone dye. However, the solubility of surfactant in siloxane non-aqueous media would decrease with the increase of EO chains. Meanwhile, the dispersion of dye was enhanced as well as the hydrolytic reaction of dye. From this investigation, some surfactant can be used to improve the fixation of reactive dye during dyeing. Furthermore, washing times after dyeing and the ecological problems can be decreased.Keywords:hydrolysis;dye-surfactant interaction;siloxane non-aqueous reverse emulsion dyeing;EO chains;vinyl sulfone reactive dye
研究领域:
纺织化学
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表面化学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Pengcheng Cui,Yi Yan,Hao Wei,Silong Wu,Shuai Zhong,Wei Sun
Passive daytime radiative cooling (PDRC) emerges as a promising cooling strategy with an attractive feature of no energy and refrigerant consumption. In the current study, for the purpose of achieving cost-efficient fabrication of a PDRC polymeric material, a microporous polymeric coating is prepared by a novel “inverse emulsion”-“breath figure” (Ie-BF) method using water droplets as pore-formation template, and the porous morphologies of both the surface and bulk layer can be dynamically manipulated by tuning the emulsion composition as well as environmental conditions. Therefore, the solar reflectivity of the Ie-BF coating can be efficiently tuned within a rather wide range (21–91%) by facile modulation of porosity and thickness. The Ie-BF coating with a thickness of only 125 μm exhibits a high solar reflectance of 85.4% and a long-wave infrared emissivity of 96.3%, realizing a subambient radiative cooling of 6.7 °C and a cooling power of ∼76 W m–2 in the open air. Moreover, by employing the reversible feature of in situ pore formation and erasure combined with the additional attachment of a carbon black layer, the composite film could be easily switched between cooling and heating modes by solvent post-treatment. This research establishes a cost-efficient strategy with high flexibility in the structural manipulation concerning the construction of porous polymeric PDRC coating.
研究领域:
材料科学
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能源工程
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环境科学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Hongyan Xue,Youmei Han,Guanglei Liu,Wenjing Chen,Zhihang Wang,Nong Wang
Surfactants play a crucial role in applications such as oil-water separation, foam flotation , drug delivery, emulsion polymerization , and emulsifier recovery. Stimulus-responsive surfactants, as innovative smart materials, can reversibly control emulsion decomposition or phase transformation, facilitating emulsion circulation and component recovery. In this paper, two short-chain fluoroazobenzene photoresponsive surfactants ( FADC-2 and FADC-4 ) were synthesized. Three different reversible emulsion systems were constructed, leveraging the excellent chemical stability and rapid photoresponse of azobenzene and the trifluoromethyl group as a hydrophobic moiety. The results indicate that under different light exposures, the FADC-2 /n-hexane/water and FADC-4 /n-hexane/water emulsions exhibit reversible emulsification and demulsification cycles, while the FADC-4 /n-octanol/water emulsions show reversible phase transfer. These findings highlight the effectiveness of photoresponsive surfactants in controlled emulsion systems, offering promising applications in fields requiring precise emulsion manipulation and liquid-liquid phase transfer, at the same time advancing the development of environmentally friendly, practical, durable, and stimulus-responsive surfactants.
研究领域:
物理化学
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胶体与界面化学
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功能材料
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环境化学
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分离科学
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 60
·期 15
·2362-2370
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IF 3.046
Jiajun Gao,Pengcheng Cui,Lingyun Ding,Taiyi Xu,Yuanlai Ju,Bibo Yu,Wenwu Zhang,Zhilv Zhang,Wei Sun
The relationships between three steps of the inverse emulsion-breath figure (Ie-BF) method, including emulsion preparation, film casting and hydrophilic component loading, are explored by adjusting the experimental factors of the three implementing processes. For emulsion preparation step, the influence of the ultrasonification, the concentration of emulsifier and the addition of polymer on the size of the emulsion droplets are investigated. For film casting step, the influence of environmental humidity and several factors concerning the emulsion preparation on the porous structure of the resultant films are studied. It has been proved that high humidity is a necessity for obtaining surface pores, and multi-layered pores with disordered distribution can be formed in the bulk layer of the film when high water/oil ratio is used in making the emulsion. Bovine serum albumin is loaded into the emulsion water droplets, and by implementing the Ie-BF method under the condition of water/oil ratio being as low as 0.02 vol%, selective protein enrichment within the interior of the top-layer pores is still realized. It reflects the characteristics of “high efficiency, targeted assembly” in the step of hydrophilic component loading. Graphical
研究领域:
材料科学
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化学工程
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胶体与表面化学
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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）