REACTIVE & FUNCTIONAL POLYMERS
·
2021
·
IF 3.975
Xiaotong Li,Liqin Cao,Bin Wu,Yong Dong,Jide Wang,Liu-ping Chen
Designing efficient nanoparticle-based stabilizer that is suitable for achieving an interconnected porous monolith still remains a challenge. Herein, Ag-nanocomposite poly high-internal phase emulsion (HIPE) template was readily obtained by O/W HIPE, co -stabilized by silver nano powders (Ag-NPs) and polyvinyl pyrrolidone. Cyclohexane as oil phase, N, N ′-methylenebisacrylamide as a crosslinking agent, and free-radical copolymerization of acrylamide (AM) and 2-acrylamide-2-methyl propane sulfonic acid (AMPS) were used in the water phase, which was initiated by potassium persulfate. Thus, Ag-nanocomposite copolymer poly(HIPE)s [Ag/P(AM- co -AMPS)] were obtained via a one-pot synthesis method. The effects of Ag-NP content and different internal phase volume on the porous composites were investigated. The morphology and structures of the composites were characterized, and the average pore size was measured to be approximately 60 μm. Furthermore, the catalytic activity was studied via catalytic degradation of the methylene blue (MB). The decolorization of the MB solution can be completed within 8 min by using the composites containing 5 wt% Ag-NPs. The composite poly(HIPE)s had certain antibacterial activity against E. coli and S. aureus bacteria (9 mm zone of inhibition). Moreover, a compression electric sensitivity ( GF = 2.05) was exhibited with an enhanced electrical conductivity . Thereby, a facile approach to multifunctional macroporous Ag-nanocomposite poly(HIPE) was presented.
研究领域:
材料科学
·
纳米技术
·
化学工程
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xue Bai,Jiangdong Dai,Yue Ma,Weibai Bian,Jianming Pan
It is highly desirable to develop an efficient adsorbent with large capacity, high selectivity and fast kinetics to recovery virtually inexhaustible lithium ion (Li + ) resources from salt lake brine. In this work, 2-(allyloxy) methylol-12-crown-4 ether (2AM12C4) functionalized polymer brushes (PVBC-g-PCE) from macroporous polymeric high internal-phase emulsion (PolyHIPE) using UV-initiated surface polymerization are synthesized for selectively recovery of Li + . PVBC-g-PCE possesses the advantages of strong physical strength, high density of accessible binding sites, and the size of highly permeatable voids and interconnecting pores is about 8.0–18 µm and 3.3–4.8 µm, respectively, which is a favorable adsorbent for specific capture Li + . PVBC-g-PCE has a maximum capacity at pH 6.0, and the pH-dependent adsorption amount suggests the grafted polymer brushes of 2AM12C4 is the driving force to enhance binding performance. PVBC-g-PCE has a fast adsorption equilibrium within 45 min, and the kinetic results are well-described by the pseudo-second-order model, indicating the specific host-guest interaction between functionalized 2AM12C4 and Li + is the main adsorption mechanism. Moreover, the maximum monolayer binding amount of PVBC-g-PCE is 4.43 mg g −1 , and the strong affinity in the presence of four kinds of interfering ions (i.e. Na + , K + , Mg 2+ , and Ca 2+ ) is also observed, which can also be proved by the high relative selectivity separation coefficient ( α r ) between 3.16 and 7.98. It is expected that this PVBC-g-PCE with abundant easy-to-access specific recognition sites can be applied as a promising adsorbent for effective separation of Li + .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Zhuangzhuang Chen,Suhao Sun,Qian Zhou,Xitong Wang,Jinhua Hu,Peng Zhou
The rising demand for innovative food structure design has highlighted the potential of high internal phase emulsion gels (HIPE-gels) for 3D food printing due to their tunable rheological properties and high oil content. However, challenges such as inadequate mechanical strength, rheological instability, and environmental sensitivity limit their performance. In this study, we investigated the role of sodium hyaluronate (HA) with varying conformations and concentrations in stabilizing HIPE-gels formulated with micellar casein concentrate (MCC). HA significantly improved the structural and functional properties of the gels, with its molecular weight and concentration critically affecting viscosity, rheology, and printability. The entanglement of HA chains at the emulsion interface enhanced viscoelasticity, resulting in superior mechanical strength and high-fidelity 3D printing. Notably, the H-HA 1.0 -MCC gel achieved a printing accuracy of 98.28 ± 0.99 % and stability of 98.49 ± 0.49 %. This study provides a polysaccharide-mediated stabilization strategy to address key limitations in food-grade HIPE-gels, paving the way for complex texture design and the development of high-value food products.
研究领域:
食品科学
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材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Ruizhe Lin,Zhengqiao Yin,Yuanyuan Sun,Shengmiao Zhang
This work demonstrates an ex-situ swelling strategy for fabrication of the robust hierarchically porous polyHIPE. Specially, a cationic polyHIPE was prepared by copolymerization of 2-(methacryloyloxy) ethyltrimethylammonium chloride, styrene and divinylbenzene within a water-in-oil (w/o) high internal phase emulsion (HIPE). The hierarchically porous polyHIPE was achieved via simply swelling the polyHIPE in decane at 70 °C, and subsequent removal of the solvent at room temperature . There were large amounts of small pores found on the void wall surface. Compared with the hierarchically porous polyHIPE fabricated with decane as porogen (in-situ swelling, conventional route), the ex-situ swelling strategy endowed the materials semblable complex pore morphology but much less damage to its compression performance. The young's modulus of the hierarchically porous polyHIPE herein was 37% higher than that obtained by a conventional way. Afterwards, the hierarchically porous polyHIPE was utilized as a carrier for AgNPs (AgNPs@polyHIPE). The AgNPs@polyHIPEs exhibited eminent catalytic activity and recyclability for the reduction of the rhodamine B. Thereby, a facile approach for preparation of high strength and hierarchically porous polyHIPE was presented, and the resulted polyHIPE can be an ideal support for noble metal nanoparticle catalysts.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 6
·959
·
IF 3.164
Peijian Sun,Song Yang,Xuehui Sun,Yipeng Wang,Yunzhen Jia,Pingping Shang,Haiying Tian,Guozheng Li,Ruyang Li,Xiaobing Zhang,Cong Nie
Polystyrene-based polyHIPE (polymerized high internal phase emulsion) materials were prepared by the copolymerization of styrene and divinylbenzene in the continuous phase of a HIPE. The resultant polyHIPE materials were found to have an open-cellular morphology and high porosity, and the polyHIPE structure could be well adjusted by varying the water/oil (W/O) ratio and the amount of emulsifier in the HIPE. Cell culture results showed that the resultant polyHIPE materials, which exhibited larger voids and connected windows as well as high porosity, could promote cell proliferation on the 3D scaffold. A 3D cell cytotoxicity evaluation system was constructed with the polystyrene-based polyHIPE materials as scaffolds and the cigarette smoke cytotoxicity was evaluated. Results showed that the smoke cytotoxicity against A549 cells is much lower in the 3D cell platform compared to the traditional 2D system, showing the great potential of the polyHIPE scaffolds for 3D cell culture and the cytotoxic evaluation of cigarette smoke.Keywords:polyHIPE;3D cell culture;cytotoxicity evaluation;cigarette smoke;polystyrene
研究领域:
材料科学
·
生物医学工程
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Bing Li,Yao Chen,Wen Guan,Yanan Wei,Yunlei Zhang,Yongsheng Yan
In this paper, water-in-oil (W/O)-type Pickering high-internal phase emulsions (Pickering HIPEs) were stabilized using the modified SBA-15 with appropriate wettability as the stable particle. After thermal polymerization and subsequent sulfonation, we obtained hierarchical porous nitrogen-doped carbon catalysts (SNCs) with acid–base bifunctional active sites. The as-prepared catalysts have hierarchical porous structures, and acidic and basic catalytic activity centers, which can significantly improve the catalytic activity of the conversion of glucose to 5-hydroxymethylfurfural (HMF). The results showed that the highest HMF yield of 61.3% can be obtained, and the recovered catalyst still has a significant catalytic activity after four consecutive cycles. This work offers a versatile strategy for developing nitrogen-doped carbonaceous catalysts for a wide range of biomass transformation to platform chemicals.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Junyang Chen,Zhendong Xie,Riccardo Sapienza,Zhijia Hu,Lorena Ruiz-Pérez,Xiaohe Tian,Giuseppe Battaglia
Random lasers (RLs) represent a distinctive class of laser systems wherein emission arises from multiple scattering events occurring with random orientations within a disorder media. Departing from conventional laser architectures, RL emission is primarily governed by random scattering phenomena, inherently limiting precise control over emission directionality and threshold intensity. Achieving a laser system with finely controllable RL characteristics poses a significant challenge. In this investigation, using polymeric high internal phase emulsion (PolyHIPE) scaffolds, known for their highly customizable surface topographies, is exploredas scattering media platforms for RLs. Dye on the PolyHIPE surface enables interaction with external stimuli, showing sensing potential. Using surface chemical modification techniques, the amphiphilic molecular is grafted onto the HIPE surface and RL behavior is investigated across HIPEs with controllable pore sizes. Notably, a discernible correlation emerges between the RL threshold and the collective influence of polyHIPE platform morphology and gain particle configuration. This heightened adaptability and finely tunable precision in the RL system offer increased versatility, enabling the tailored design of optimal lasers suited for diverse application scenarios. Consequently, these advancements substantially enhance the utility and versatility of RLs in various fields.
研究领域:
材料科学
·
光学
·
超分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 110
·109253-109258
·
IF 3.289
Yujia Wan,Yanyan Feng,Decheng Wan,Ming Jin
For supported metal nanoparticles, the ligand/support is crucial to their catalytic activity, stability and recyclability. Here we show that a polyamino dendritic amphiphile is a versatile mediator for supported platinum nanoparticles (PtNPs). PEI@PS-EHA, a branched polyethylenimine (PEI) with a shell of poly(styrene-co-2-ethylhexyl acrylate) (PS-EHA), will self-assemble along the interface of a water-in-oil (W/O) emulsion, and stabilize a corresponding high internal phase emulsion (HIPE); after transformation of the HIPE into an open-cellular material termed polyHIPE, PEI@PS-EHA will act as a surface modifier to immobilize PtNPs. The supported catalyst is very fit for reduction reactions because the Pt species hardly leaches in a reductive environment (judged just from the leaching data, the catalyst can be recycled over 10 million times). No ripening of the supported PtNPs is found for over 1500 equivalent cycles, as judged from the apparent rate constant. The ready separation, high activity, extremely low metal leakage and high durability make the catalyst promising.
研究领域:
化学工程
·
催化材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Yunlei Zhang,Yating Shen,Yao Chen,Yongsheng Yan,Jianming Pan,Qingang Xiong,Weidong Shi,Longbao Yu
In this study, macroporous inorganic–organic hybrid polymers (MIPs) were prepared using versatile high internal phase emulsions (HIPEs) templating to synthesize a novel catalyst for cellulose conversion. Upon the incomplete hydrothermal carbonization of MIPs and sulfonation with H 2 SO 4 , macroporous carbonaceous solid catalysts (MCSC) with hierarchical structures and Brønsted–Lewis acid sites were obtained. The synthesized MCSC was found to be highly effective to produce 5-hydroxymethylfurfural (HMF) in the 1-butyl-3-methyl-imidazolium chloride ([BMIM]-Cl) ionic liquids. It was shown that remarkable HMF yield (43.1%) and selectivity (57.7%) can be obtained and the catalyst is recyclable up to four consecutive cycles without significant loss of catalytic activity. This implies that catalysts with designed physicochemical characteristics are advantageous over traditional ones in producing HMF. A catalytic scheme was proposed to characterize the cellulose conversion to HMF using the MCSC.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Yulai Zhao,Zhuang Zhao,Jing Zhang,Mengzhi Wei,Xiancai Jiang,Linxi Hou
In this work, a gemini-surfactant (i.e. sodium dilauramino cysteine, SDLC) stabilized high internal phase emulsion (HIPE) template was utilized to prepare monolithic polyHIPEs of chitosan- g -polyacrylamide (CT- g -PAAm) for the first time. The influences of internal phase fraction and emulsifier concentration on the porous structures were studied. The morphologies of polyHIPEs were observed via scanning electron microscope (SEM) while structure parameters were investigated by combining nitrogen adsorption/desorption measurements with mercury intrusion porosimetry (MIP). Highly porous polyHIPEs of CT- g -PAAm with porosity varying from 86 to 93% were obtained at different internal phase fractions. PolyHIPEs were also prepared using Tween 20 as the emulsifier for comparison. It was found the polyHIPE using SDLC emulsifier (S-polyHIPE) showed higher porosity and consequent smaller foam density than that using Tween 20 emulsifier (T-polyHIPE), implying the gemini-surfactant can act as a novel type of promising emulsifier for the preparation of porous polyHIPEs. In addition, the adsorption performances of polyHIPEs were evaluated by adsorbing methylene blue (MB). At the same internal phase fraction, S-polyHIPE showed higher adsorption capacity and faster adsorption rate than T-polyHIPE. The adsorption data were analyzed by isotherm models and dynamic models, respectively. The results indicated that the adsorption occurs as a monolayer on the adsorbent surface with equal adsorption sites.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 45
·11619-11626
·
IF 5.16
Umair Azhar,Chuanyong Zong,Xiaozheng Wan,Anhou Xu,Zhang Yabin,Jitao Liu,Shuxiang Zhang,Bing Geng
Graphical Preparation of porous methyl methacrylate with high internal phase emulsion (HIPE) solely stabilized by fluorinated di-block copolymer is described. Optical and scanning electron microscope images of HIPE and polyHIPE, are presented. Preparation of stable water-in-oil (W/O) high internal phase emulsion (HIPE) containing methyl methacrylate (MMA) monomer as oil phase is a difficult task due to the significant solubility of MMA in water. Here, for the first time a fluorinated di-block copolymer (FDBC) poly (2-dimethylamino)ethylmethacrylate- b -poly (trifluoroethyl methacrylate) (PDMAEMA- b -PTFEMA) is proposed to stabilize HIPEs of MMA without the use of any co-stabilizer or thickening agent. Fluorinated segments in FDBC anchored well at oil/water interface of HIPE, offering high hydrophobicity to the partially hydrophilic MMA monomer and in turn stabilization to MMA-HIPE. By using fluorinated di-block copolymer as stabilizer, highly stable HIPEs can be obtained. In addition, highly interconnected porous monoliths were obtained after free radical polymerization, which are highly desirable materials in various practical applications including tissue engineering scaffolds, separation science, bio-engineering and so on. The as-prepared MMA-HIPEs possess high thermal stability without phase separation. The textural characteristics of as-prepared composites, such as pore size and distribution, can be easily controlled by simply varying the amount of FDBC and/or dispersed phase fraction. Moreover, the influence of di-block concentration on water uptake (WU) capability of the prepared porous monoliths is explored.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52914
·
IF 3.057
Junzhi Lin,Xianger Xia,Yifei Liu,Zhenchao Luan,Yezhen Chen,Kunkai Ma,Bing Geng,Hui Li
Fluoro-PolyHIPEs with porous structure exhibit an excellent weather resistance for adsorption, separation or catalyst support applications in extreme environments, however, the specific surface area still needs to be improved. In this study, a porous fluorinated material is prepared by using high internal phase emulsion template method, and the porous structure of fluoro-PolyHIPE (F-PolyHIPE) is subsequently excavated and modified by the hypercrosslinking “knitting” method. The “knitting” of micropores in the pore walls of the fluoropolymer is achieved through the Friedel-Crafts alkylation reaction by using dimethoxymethane (FDA) as the external crosslinker. It transforms the macroporous fluoropolymer prepared based on HIPE emulsion template method into hierarchical porous fluoro-PolyHIPE (HCPF-PolyHIPE) with a high specific surface area. The specific surface area of the porous fluorinated material demonstrates an increment from 15.6 m 2 g −1 to 353.2 m 2 g −1 after hypercrosslinking. Owing to the introduction of the micropores and mesopores as well as the enrichment of the fluorine atoms in the polymer network, HCPF-PolyHIPE can be successfully applied for CO 2 adsorption, thus, representing a major achievement of the study. Moreover, HCPF-PolyHIPE exhibits excellent thermal stability as well as acid and alkali resistance, thus, confirming potential application prospects in the fields of oil-water separation and gas adsorption.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）