CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Yunlei Zhang,Jianming Pan,Yao Chen,Weidong Shi,Yongsheng Yan,Longbao Yu
Due to its widely available, inexpensive, renewable and carbon–neutral properties, biomass of cellulose is considered to be the most promising candidate to produce 5-hydroxymethylfurfural (HMF). In this work, high internal phase emulsions (HIPEs) templating methodology, subsequent ion-exchange, and the surface grafting technique are combined to synthesize macroporous, acid–base bifunctional, and superhydrophobic polymeric solid catalyst for the production of HMF from cellulose in a one-pot manner. The catalyst are well characterized by field emission scanning electron microscopy, fourier transform infrared spectroscopy, 13 C solid-state nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy, pyridine fourier transform infrared spectroscopy and NH 3 /CO 2 temperature-programmed desorption. Results of characterization demonstrated that the as-prepared catalyst possesses average void diameter at 12.5 μm, interconnecting pore diameter at 2.8 μm, contact angle at 150°, acid strength at 3.034 mmol g −1 and base strength at 1.379 mmol g −1 , respectively. By simply varying the parameters of HIPEs templates (i.e., the volume fraction of the internal phase and surfactant concentration), the molar ratio between acid/base monomer and the grafted amount of 1-dodecanethiol, the pore structure, acid and base strengths, wettabilities of catalyst can be easily adjusted. Results of catalytic experiments involving cellulose-to-HMF conversion indicated that as-prepared catalyst can effectively improve the reaction rate, increase the HMF yield and prohibit the hydration of HMF to by-products. And remarkable HMF yield of 49.5% and selectivity of 55.9% can be obtained from 100 mg cellulose under the optimal conditions. Furthermore, catalyst can be easily recovered and reused at least five times without significant loss of catalytic activity. This work represents a continuation of efforts for fabrication and application on multi-functional heterogeneous catalyst for excellent conversion of one-pot cellulose to HMF.
研究领域:
化学工程
·
催化材料科学
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产品关联
DOI
高影响因子
Foods
·
2024
·Vol. 13
·期 24
·4009
·
IF 4.7
Yixiao Wang,Ling Zhang,Geng Cao,Zhaorui Li,Ming Du
The effect of tilapia skin gelatin properties on the characteristics of high internal phase emulsions (HIPEs) and the quality of 3D printing remains unidentified. In this work, HIPEs were constructed by gelatin with various properties that were obtained by heat treatment. The results indicated that the gelatin undergoes degradation gradually with an increase in heating intensity. The highest values of intrinsic fluorescence intensity, surface hydrophobicity, and emulsification were obtained when the heating time was 5 h. The gel strength and hardness of gelatin hydrogels were negatively correlated with heat treatment temperature. HIPEs constructed by gelatin extracted at 70 °C demonstrated a suitable material for 3D printing. The storage modulus (G′) and viscosity of HIPEs exhibited a similar tendency as the gel strength of gelatin. The microstructure of HIPEs revealed that gelatin established a gel network around oil droplets, and the higher G′ of HIPEs corresponded to a more compact network structure. This study elucidated the correlation between the structure and properties of gelatin, offering essential insights for the formulation of HIPEs by natural gelatin, which is suitable for applications across several domains.
研究领域:
食品科学
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材料科学
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化学工程
·
生物技术
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产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Fusheng Sun,Chuanxin Pan,Xinru Zhang,Yuanman Liang,Weiyu Shen,Yantao Liu,Duoxia Xu,Nan Yang
In this work, Pickering emulsions, stabilized with carboxymethyl tamarind seed polysaccharide/chitosan (CMTSP/CS) complex microgels, were formulated with oil-phase ratios of 60 % and 80 % and encapsulating curcumin. The stability and in vitro digestive characteristics were systematically investigated. High internal phase emulsions (HIPEs) with 80 % oil phase demonstrated superior storage stability and improved oxidative stability. SAOS and LAOS analysis further revealed that the HIPEs stabilized by CMTSP/CS complex microgels at 1:1 ratio exhibited the highest viscoelastic property and greatest deformation resistance. Increasing the mass ratio of CMTSP to CS from 1:5 to 1:1 formed a more stable interfacial film of emulsion droplets with superior viscoelastic properties, resulting in higher centrifugal resistance and thermal stability. The Pickering emulsion (particularly HIPEs at 1:1) showed reduced curcumin degradation and higher retention rates. Lipid digestion kinetics revealed that the HIPEs at 1:1 achieved maximal free fatty acid release and the highest curcumin bioaccessibility. The system exhibited an increased electrostatic repulsion and highest viscoelastic film properties, which effectively mitigated oil droplet aggregation. It facilitated the release of free fatty acids and promoted the formation of additional mixed micelles, thereby improving the bioaccessibility of curcumin.
研究领域:
食品科学与技术
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胶体与界面化学
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药物递送
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纳米技术
·
功能食品
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产品关联
DOI
高影响因子
Foods
·
2026
·Vol. 15
·期 10
·1740
·
IF 6
Xiufang Huang,Yifan Shi,Yaobing Chen,Jianquan Kan,Kai Luo
This study aims to improve the utilization ofIdesia polycarpacrude oil (IPCO) in the food industry by developing high-internal-phase emulsions (HIPEs) stabilized through ternary complexes (ovalbumin (OVA), xanthan gum (XG), and tannic acid (TA)). IPCO is highly prone to oxidation due to its polyunsaturated fatty acid (PUFA) content. Optimal formulations were obtained by varying the component concentrations and assessing the structure, stability, and fat-substitution potential. Under conditions of 0.6%w/vXG and 2.5%w/vOVA-TA, HIPEs exhibited a smaller particle size (3.31 μm), high centrifugal oil retention (99.29%), strong emulsifying activity (49.91 m2/g), and excellent stability (99.69%). Additionally, a formulation with 1.5%w/vOVA-TA and 0.8%w/vXG showed good wettability, particle size, and stability, possibly due to excessive self-aggregation of XG, which caused a decrease in emulsion stability and wettability. Structural analysis (FTIR, XRD, SEM, CLSM) revealed that the stability of the emulsions was mainly attributed to strong non-covalent interactions and a dense interfacial adsorption layer. In cookie applications, substituting 25%w/wbutter or 50%w/wshortening with HIPEs resulted in comparable texture to the control group. GC–MS analysis of relative fatty acid composition showed that partial replacement with IPCO-based HIPEs shifted the final biscuits toward a lower relative proportion of palmitic acid (C16:0) and a higher relative proportion of linoleic acid (C18:2n6c). Overall, OVA–TA–XG-stabilized HIPEs effectively delayed the oxidation of IPCO and enabled partial replacement of conventional solid fats in biscuits, thereby shifting the relative fatty acid composition of the final products toward a higher proportion of unsaturated fatty acids.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Jianming Pan,Jun Zeng,Qin Cao,Heping Gao,Yongchao Gen,Yinxian Peng,Xiaohui Dai,Yongsheng Yan
In this work, the hierarchical porous foams (HPFs) were fabricated and applied as the novel adsorbent for simultaneous removal of λ-cyhalothrin (LC) and Cu(II). Macroporous poly(glycidyl methacrylate) foams (MPGMA) with highly interconnected pore network were firstly prepared by high internal phase emulsions (HIPEs) template. Then carboxylated mesoporous silica nanoparticles (CMSNs) were grafted onto the interface of macroporous foams via the reaction between epoxy groups on MPGMA and carboxyl groups on CMSNs . The as-prepared HPFs composites possessed macropores ranging from 10 μm to 40 μm and uniform mesopores on average of 2.5 nm, and their large amount of carboxyl groups resulted in a favorable adsorption for λ-cyhalothrin (LC) and Cu(II). In single adsorption, the maximum adsorption capacity of HPFs for LC and Cu(II) were 80.11 mg g −1 and 21.79 mg g −1 at 288 K, respectively. The adsorption mechanism between LC and HPFs could be the hydrogen bonding and hydrophobic interaction, while the electrostatic attraction maybe the main interaction between Cu(II) and HPFs. Binary adsorption showed that the enhanced adsorption capacity of LC was 104.1 mg g −1 in the presence of 15 mg L −1 Cu(II) at 288 K, and the excellent result of Cu(II) was 22.23 mg g −1 with the mixed solution of 50 mg L −1 LC at 288 K, indicating the existence of promotion in adsorption ability in the case of coexistence of LC and Cu(II). Moreover, HPFs could maintain stability after five adsorption/desorption cycles in the regeneration steps.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 81
·43029-43038
·
IF 3.708
Heping Gao,Yinxian Peng,Jianming Pan,Jun Zeng,Changhua Song,Yunlei Zhang,Yongsheng Yan,Weidong Shi
Stable water-in-oil (W/O) Pickering high internal phase emulsions (HIPEs) with an internal phase volume fraction of 84.8% were first stabilized by both the hydrophobic silica nanoparticles and span 80. Then, based on the obtained Pickering HIPEs, several macroporous polymerized solid acid (PDVB-SS-X-SO3H, X = 0, 0.2, 0.6) were prepared by polymerizing divinyl benzene (DVB) and sodium p-styrenesulfonate (SS), and were subsequently combined with sulfonation in H2SO4. All the as-prepared PDVB-SS-X-SO3H possessed open-cell structure, interconnecting pores and strong acidity, and were adopted as catalysts to convert cellulose into 5-hydroxymethylfurfural (HMF) in the presence of [Emim]Cl-mediated solvents. The results showed a maximum yield of 29.6% for PDVB-SS-0.2-SO3H, 12.9% for PDVB-SS-0-SO3H and 15.5% for PDVB-SS-0.6-SO3H under the same condition within 2.0 h at 120 °C, suggesting that the pore sizes and strong acidic sites played a key role in cellulose conversion. PDVB-SS-X-SO3H can be very easily recycled at least four times without a significant loss of activity. This research opens up a new method to synthesize porous solid acid catalyst materials through Pickering HIPEs templates.
研究领域:
化学工程
·
催化材料科学
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2023
·
IF 8.1
Xuan Huang,Chunjun Yan,Yanfei Xu,Min Ling,Changwei He,Zheng Zhou
Alkaline-extracted walnut protein isolates showed relatively poor solubility and emulsifying properties in many previous studies. However, whether they can be used as potential emulsifiers to stabilize high internal phase emulsions (HIPEs) remains unknown. Herein, walnut protein isolates were prepared by alkaline extraction from walnut kernels with or without pellicles (named PAWPI and AWPI, respectively). PAWPI conjugated with pellicle polyphenols showed improved solubility and higher antioxidant capacity than AWPI. HIPEs were fabricated via a one-step method using AWPI or PAWPI as the sole protein emulsifier. HIPEs (oil fraction of 0.8, with 0.1% β-carotene) could be stabilized by PAWPI at a relatively low concentration of 0.2% (w/v), while at least 1% (w/v) AWPI was required to effectively stabilize HIPEs. HIPEs stabilized by PAWPI had smaller oil droplet sizes than those stabilized by AWPI. Rheological analysis indicated that PAWPI-stabilized HIPEs showed higher viscosity and better viscoelasticity than AWPI-stabilized HIPEs. Large-amplitude oscillation shearing analysis suggested that PAWPI-stabilized HIPEs were stiffer but more brittle than AWPI-stabilized HIPEs. Moreover, both PAWPI- and AWPI-stabilized HIPEs exhibited good storage stability and were relatively stable against heat treatment and ionic strength. PAWPI-stabilized HIPEs showed a higher protective capacity for encapsulated β-carotene than AWPI-stabilized HIPEs. In addition, PAWPI-stabilized HIPEs showed good 3D printability and could be used as a promising edible ink.
研究领域:
食品科学
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2013
·Vol. 5
·期 1
·175-185
·
IF 5.231
Qijing Chen,Yuanyuan Xu,Xueteng Cao,Lianjie Qin,Zesheng An
A series of five core cross-linked star (CCS) polymers has been synthesized by RAFT-mediated heterogeneous polymerization in aqueous media. These CCS polymers consist of poly(MEAx-co-PEGAy) (MEA is 2-methoxyethyl acrylate and PEGA is poly(ethylene glycol) acrylate) of different compositions. They exhibit responsiveness to both temperature and salt. Addition of kosmotropes reduces the cloud point, and addition of chaotropes raises the cloud point. These CCS polymers can stabilize dodecane-in-water high internal phase emulsions (HIPEs) in the absence or presence of salts. Addition of salts has negligible effect on the maximum oil fraction, the size of oil droplets or the stability of the HIPEs. HIPEs with large oil fractions (up to 92 vol%) at low concentrations of CCS polymers (≤1 wt%) can be routinely obtained. When the oil volume fraction is larger than 74 vol%, gelled HIPEs are formed with long-term stabilities (more than three months). The temperature and salt responsiveness of the CCS polymers is transferred to the CCS-stabilized HIPEs. Addition of kosmotropes can enhance demulsification efficiency, while addition of chaotropes can decrease demulsification efficiency or enhance the thermal stability of the CCS-stabilized HIPEs. The emulsification–demulsification cycle can be successfully repeated four times. The facile and aqueous synthesis of CCS polymers and the fast response of the CCS-stabilized HIPEs will open up new opportunities for the preparation and exploitation of a range of smart soft materials.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Wen Guan,Yunlei Zhang,Yanan Wei,Bing Li,Yonghai Feng,Changhao Yan,Pengwei Huo,Yongsheng Yan
As an important renewable alternative to the production of petroleum-derived terephthalic acid, selective aerobic oxidation of biomass derivative 5-hydroxymethylfurfural (HMF) into high value-added 2,5-furandicarboxylic acid (FDCA) is attracting increasing attention. Herein, a novel hierarchical porous nitrogen-doped carbon (NC) supported bimetallic AuPd catalyst was synthesized by Pickering high internal phase emulsions (Pickering HIPEs) templating method, subsequent carbonization and the sol-curing technique. By varying Pickering HIPEs parameter, nitrogen-doped content and the loaded AuPd nanoparticles, Au x Pd y /NC catalysts with adjustable porous structure and basicity were obtained. Benefiting from the synergistic effects of the high basicity of NC support and efficient bimetallic AuPd catalyst, tandem oxidation of HMF to FDCA reactions can be carried out under base-free condition in water, which makes the biomass transformation process environmental friendliness and economic. And the highest yield of FDCA at 96.7% was achieved under the optimal reaction conditions. Regeneration test revealed the obtained Au x Pd y /NC catalyst was recovered and reused at least five times without significant loss of catalytic activity. The present work offers a versatile strategy for developing nitrogen-doped carbon supported highly efficient bimetallic catalysts with hierarchical porous structure and adjusting basicity for a wide range of base-free catalytic oxidation in water.
研究领域:
催化化学
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材料科学
·
生物质转化
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 7
·1591-1601
·
IF 2.578
Yongxia Yang,Jing Li,Yong Dong,Jide Wang,Liqin Cao
Monolithic porous copolymers with 3D structure were prepared via CO 2 -in-water high internal phase emulsions template by graft copolymerization of sodium methacrylate (MAANa) on to methyl cellulose (MC) backbone. The yielded copolymer monoliths are characterized by Fourier transform infrared spectra, scanning electron microscopy (SEM), and mechanical instrument, the swelling degree of MC- g -PMAANa monoliths with different crosslinker in diverse pH were investigated. The adsorption performance of monolith to Cu(II) were conducted to explore its adsorption capacity to heavy metal ions from the wastewater. Then, a strategy of in situ growth of metal-organic frameworks (MOFs) on MC- g -PMAANa that adsorbed with metal ions was proposed first. The X-ray powder diffraction, SEM, and Brunauer-Emmett-Teller (BET) surface area result of MC- g -PMAANa/MOFs composites indicated that the MOFs nanoparticles were grown uniformly on the monolith wall without destroying its original 3D porous structure. Compared with MOFs nanoparticle, MC- g -PMAANa/MOFs composites have advantages of easy operation and handle, which more conform to practical application. Furthermore, the antibacterial activity of MC- g -PMAANa/MOFs was evaluated by disk agar diffusion and optical density methods. In addition, MC- g -PMAANa/Cu-BTC composite was applied to dye adsorption, which has proved the underlying application of such composites in dye removal.
研究领域:
材料科学
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化学工程
·
环境科学
·
纳米技术
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 8
·3194-3204
·
IF 3.665
Hong-yan Niu,Li-qin Cao,Xu-le Yang,Kai-nan Liu,Lu Liu,Ji-de Wang
Here, the ZnO/polyacrylamide (ZnO/PAM) macroporous composite monolith was first prepared through the radical polymerization of acrylamide in ZnO-costabilized CO 2 -in-water Pickering high internal phase emulsions (HIPEs). An efficient and green synthesis method was used to prepare the ZnO/PAM porous precursor materials, and ZnO nanoparticles (NPs) were used as a metal ion source to grow the metal organic frameworks (MOF) phase through secondary recrystallization, thereby synthesizing the target MOF/PAM porous monolith. The effects of the contents of ZnO NPs on the formation of HIPEs and properties of the target MOF/PAM composites for the photocatalytic degradation of cationic dye were studied. As the content of ZnO NPs increased to 3.75 wt%, the composite monolith had high mechanical stress (0.24 MPa) at 80% strain and recovered their shape. The as-synthesized ZIF-8/PAM composites were characterized using X-ray diffraction, scanning electron microscope (SEM), Brunauer Emmett Teller (BET), energy dispersive X-ray spectrometer (EDS) mapping, and TG methods. SEM images showed that the hybrid materials were interconnected, and the sizes of the open macropore and interconnected pore throats were 30–125 and about 2–20 μm, respectively. In addition, the ZIF-8/PAM material could be used as a high-efficiency photocatalyst to remove the cationic dye at a fast rate (88.6%).
研究领域:
材料科学
·
化学
·
环境科学
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产品关联
DOI
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 6
·3783-3796
·
IF 4.9
Yin Xuchu,Wang Yuting,Xu Zhiguang,Zhang Tao,Zhao Yan
Cellulose-based, porous materials (polyHIPEs) templated from emulsions are promising for thermal insulation, but their high susceptibility to combustion when exposed to fire hinders the materials from various applications. Here, we report the fabrication of flame-retardant, cellulose-based, thermal insulating polyHIPEs and their application for early fire warning. The polyHIPEs were synthesized from cellulose crystal-stabilized Pickering emulsions, containing ammonium salt of 1-hydroxyethylidene-1,1-diphosphonic acid as a reactive flame retardant, with or without MXene. The resulting polyHIPEs exhibited pre-designable external shapes, flexibility, robust compression, excellent thermal insulation with a thermal conductivity as low as 31.9 mW/(m·K), and high flame-retardant performance with a limit oxygen index up to 52.4% and with heat release rate and total heat release to be as low as 0.9 kJ/g and 13.7 W/g, respectively. The high thermal insulation and flame-retardant performance, combined with the responsive resistance of MXene, enabled the MXene-containing polyHIPEs to be excellent candidates for early fire warning, with warning to be realized within 3 s, with or without external power supply. Graphical abstract
研究领域:
材料科学
·
化学
·
消防安全工程
·
纳米技术
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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）