CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Yongfeng Zhu,Wenbo Wang,Yian Zheng,Feng Wang,Aiqin Wang
A series of monolithic open-cellular hydrogel adsorbents based on carboxymethylcellulose (CMC) were prepared through high internal phase emulsions (HIPEs) and used to enrich the rare-earth metals La 3+ and Ce 3+ . The changes of pore structure, and the effects of pH, contact time, initial concentration on the adsorption performance were systematically studied. The results show that the as-prepared monolithic hydrogel adsorbents possess good open-cellular framework structure and have fast adsorption kinetics and high adsorption capacity for La 3+ and Ce 3+ . The involved adsorption system can reach equilibrium within 30 min and the maximal adsorption capacity is determined to be 384.62 mg/g for La 3+ and 333.33 mg/g for Ce 3+ . Moreover, these porous hydrogel adsorbents show an excellent adsorptive reusability for La 3+ and Ce 3+ through five adsorption–desorption cycles. Such a pore hierarchy structure makes this monolithic open-cellular hydrogel adsorbent be an effective adsorbent for effective enrichment of La 3+ and Ce 3+ from aqueous solution.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 56
·32358-32367
·
IF 2.936
Yong Dong,Liqin Cao,Jing Li,Yongxia Yang,Jide Wang
A novel clean method to synthesis a composite monolith was developed. Given its amphiphilic property, UiO-66 can emulsify water and CO2 to format a high internal phase emulsion (HIPE) under certain conditions. These UiO-66-emulsified Pickering HIPEs can be used as templates to prepare interconnected macroporous MOF/polymer composite monoliths. The effects of UiO-66 amount, cross-linking agent concentration, and CO2–water ratio on UiO-66/PAM structures were investigated. Then, the as-synthesized MOF/PAM composites were characterized by TGA, XRD, SEM, and FT-IR analyses, as well as rheological and DMA measurements. The results indicated that the composites are interconnected with hierarchical pores, and the diameter of the voids is 10–50 μm. The directly prepared monoliths exhibited relatively high stresses at 82% strain and recovered their shape quickly. The adsorption capacity of the composites for methylene blue (MB) is 50 mg g−1 at a faster adsorption rate. The monoliths also exhibit underlying applications in edible oil–water separation.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Ning Zhang,Yu Zhou,Yana Zhang,Wei Jiang,Tianhe Wang,Jiajun Fu
Polystyrene is a common material featured with its low cost. In this work, a novel low dense polystyrene sponge with superhydrophobicity and compressibility was prepared successfully by a dual-templating method, including High Internal Phase Emulsions (HIPEs) processing and the introduction of organic template species. For the first time stearic acid or calcium stearate was introduced into the HIPEs system to enhance micro roughness and impart the PolyHIPEs with superhydrophobicity. Besides, owing to the low density, high porosity, interconnected network structure and ultra large void size, the sponge exhibited fast oil adsorption rate and superior oil adsorption capacity of 66.2 g/g toward diesel. After adsorption saturation, the sponge was regenerated by simple squeezing with the deoiling rate over 80%. Importantly, the sponge showed swellable property and about 80% of the initial adsorption capacity was retained after 10 adsorption-compression circles. High adsorption rate, excellent oil adsorption capacity, high selectivity, low cost, compressibility and renewability, all these favourable properties make it an ideal and practical oil adsorbent.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 43
·6935-6943
·
IF 5.342
Xiaomin Li,Tao Zhang,Zhiguang Xu,Huanjie Chi,Zhu Wu,Yan Zhao
While emulsion-templated porous polymers (polyHIPEs) with pH-controlled wetting behaviours are advantageous for the removal of oils from oil–water mixtures, they are easily clogged by oils and are not suitable for separating mixtures consisting of a small amount of water and a large amount of oils. Herein, we report the fabrication of amphiphobic polyHIPEs from high internal phase emulsions via simultaneous solution polymerization and interface-induced polymerization. After pH adjustment with an HCl solution, the amphiphobicity of the polyHIPEs was transformed into hydrophilicity–oleophobicity, which enabled water to be selectively absorbed and separated from oil–water mixtures, and the pH-triggered transition achieved the separation in a controlled manner. Moreover, the absorption was realized in a continuous manner under an external pressure provided by a pump. The resulting hydrophilic–oleophobic polyHIPEs also absorbed water from emulsified oil–water mixtures (emulsions). The pH-triggered transition from amphiphobicity to hydrophilicity–oleophobicity and the selective absorption of water from oil–water mixtures in a continuous manner make the polyHIPEs excellent candidates for the controlled removal of water from oil–water mixtures.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
An-Qi Bi,Bei-Wei Zhu,Ming Du,Chao Wu,Xiu-Ping Dong,Jin-Feng Pan,Xian-Bing Xu
Tuning protein-based Pickering high internal phase emulsions (HIPEs) into 3D printing inks is promising in the food fields. Currently, the correlation between the changes in oil phase composition and the regulation of protein-based HIPEs 3D printing performance is still unclear. In this study, spiking the shiitake oil (ranging from 0 to 60 %) into the soybean oil phase of HIPEs can enhance their rheological properties and induce the formation of 3D printable HIPEs. The rheological tests showed that the yield stress and viscosity of the HIPEs respectively increased from 81.8 ± 4.84 Pa to 309 ± 16.3 Pa and from 409 to 1.74 Pa.s to 1762–2.93 Pa.s with increasing the shiitake oil concentration (0 % to 60 %) in the oil phase. In this study, the spontaneous interaction between phenolic compounds in shiitake oil and interfacial casein promoted the aggregation of protein, which led to the formation of casein cross-linking network in emulsion droplets, thus realizing the self-supporting and printing fidelity required for 3D printing. These findings provide a new perspective for enhancing the 3D printing properties of protein-based HIPEs.
研究领域:
食品科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2024
·
IF 2.2
Hou Xu,Chang Le,Zheng Chenxuan,Liu Huarong
High internal phase emulsions (HIPEs) are commonly stabilized by a large amount of surfactants that should be removed after the polymerization of the continuous phase, and the resulting polyHIPEs from W/O HIPEs are usually brittle and chalky. Herein we report on an amphiphilic polymerizable polyurethane (PPU) macromolecular surfactant synthesized by polyaddition reaction of diisocyanates and polyols, which can well stabilize up to 88% internal phase volume of W/O HIPE with a content of only 5 wt% based the oil phase. Compared with the HIPEs stabilized by traditional surfactant Span 80, HIPEs stabilized by PPU at either room temperature or 70 °C are much more stable owing to the increased viscosity which can inhibit droplet coalescence. Moreover, the resulting polyHIPEs not only have several times higher mechanical properties than those stabilized by Span 80 but also have higher elasticity. The effects of concentration of PPU on the morphology and mechanical properties of the resulting polyHIPEs were investigated. It was found that with the increase of PPU content, the average void and window sizes decreased, while the compression strength increased. Cyclic compression tests were performed to examine reversible compressibility and durability of these polyHIPEs. Graphical abstract The polymerizable polyurethane macromolecular surfactant (PPU) synthesized through the polyaddition reaction of diisocyanates and polyols can solely stabilize high internal phase emulsions (HIPEs), and highly interconnected macroporous polymer produced by the polymerization of HIPE stabilized with PPU, known as polyHIPE, can withstand large deformation compression with no visible cracks.
研究领域:
材料科学
·
聚合物化学
·
胶体与表面化学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Qi Li,Yuehan Wu,Mohd Shabbir,Ying Pei,Hongshan Liang,Jing Li,Yijie Chen,Yan Li,Bin Li,Xiaogang Luo,Shilin Liu
O/W Pickering emulsions containing oil phase with different volume fractions (50–75 v%) were facilely prepared by using bacterial cellulose nanofibrils (BCNFs) alone. The effect of oil phase volume, storage time on the surface coverage, and coalescence rate of the Pickering-MIPEs and HIPEs (medium internal phase emulsions/high internal phase emulsions) were investigated. The Pickering-MIPEs/HIPEs exhibited excellent physical stability and low coalescence rate with droplet size varying from 32 to 91 μm. The increasing of particle contents could obviously decrease the droplet size and enhance the stability of the emulsions by strengthening the network structure and increasing the steric hindrance. The result of rheology analysis confirmed the formation of a three-dimensional network, endowing the exceptional stability of the emulsions. The emulsions revealed superb stability against a wide temperature (4–50 °C) range and salt condition (0–100 mM). This novel eco-friendly Pickering-MIPEs and HIPEs would provide great opportunities for their effective utilization in green-labelled food industry.
研究领域:
材料科学
·
食品科学
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Yanhui Zhang,Ruoning Zhang,Jian Ying,Siyi Li,Yanxiang Gao,Like Mao
High internal phase emulsions (HIPEs, 80 wt%) with different structures were developed by using different oleogelators (beeswax and ethyl cellulose) and emulsifiers (whey protein isolate and OSA starch) via a facile shearing approach. The effects of the oleogelators and emulsifiers on the stability and oral processing properties were investigated. The addition of oleogelator resulted in smaller particle sizes and higher accelerated centrifugal stability. Microstructural observations indicated the droplets were tightly packed to form oil-in-water HIPEs. Rheology tests showed that the addition of the oleogelators resulted in strain-thinning behavior and weak strain overshoot for OSA and WPI stabilized HIPEs, respectively. Tribology tests suggested that emulsifiers dominated the lubrication properties of the mixing regime, whereas oleogelators were crucial to the lubricating effects of the hydrodynamic regime. Instrumental mastication assays revealed that the WPI-HIPEs required stronger chewing force, and the addition of oleogelator weakened the normal force. After being masticated by the bionic chewing robot, droplet coalescence and phase separation occurred in the HIPEs, which was attenuated by the addition of oleogelators. These findings will assist in designing the structures of desirable textural attributes and support the creation of functional foods.
研究领域:
食品科学
·
材料科学
✓ 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
FOOD CHEMISTRY
·
2021
·
IF 7.514
Sheng Geng,Yunbo Li,Jinling Lv,Hanjun Ma,Guizhao Liang,Benguo Liu
This study evaluated the feasibility of fabricating food-grade HIPEs using a dihydromyricetin and lysozyme mixture. The effects of the oil phase volume fraction ( φ ), composition (lysozyme:dihydromyricetin, k ), and addition amount ( w ) of the mixture on the formation and properties of the HIPEs were analyzed. Then, the interactions of dihydromyricetin and lysozyme were investigated. The results indicated that when w was 0.4%, HIPEs with φ value of 90% could be obtained. Furthermore, the k also affected the microstructure, mechanical properties, oil oxidation, and lutein protection ability of the HIPEs. However, the presence of dihydromyricetin did not affect lysozyme activity. Both isothermal titration calorimetry and molecular simulations proved that they did not form a typical host–guest complex. But, dihydromyricetin could absorb on the lysozyme surface. Therefore, we speculated that lysozyme and dihydromyricetin particles could overlap and form a 3D network structure to stabilize the HIPEs, which was consistent with the microstructure observations.
研究领域:
食品科学
·
胶体化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Shuoyu Wang,Haorui Liu,Shuixia Chen
A novel PolyHIPEs with hierarchically porous structures was prepared by the polymerization of divinylbenzene via high internal phase emulsions (HIPEs) template method. The proper pore-forming agents and post-crosslinking strategy were used to create and tailor the meso- and micro-porous structure on Poly(Divinylbenzene)HIPEs. Pentaethylenehexamine (PEHA) was introduced in PolyHIPEs to prepare solid amine adsorbents for CO 2 capture. The increase of specific surface area from 81.80 to 1003.02 m 2 /g indicated the successful porous structure design of PolyHIPEs. Dynamic CO 2 adsorption experiment results proved that the Micro-PDVB-0.3PEHA and H-PDVB-0.3PEHA didn’t show satisfactory CO 2 adsorption performance, though the two supports had remarkably higher specific surface area. They showed lower CO 2 adsorption capacities of 0.78 and 1.36 mmol/g respectively at 40 ℃ than that of C-PDVB-0.3PEHA (2.73 mmol/g) and Meso-PDVB-0.3PEHA (3.66 mmol/g) with mesoporous structure. The results of CO 2 -TPD experiment and kinetics investigation verified that the loading amine compounds would preferentially fill into and block the micropores, which would hinder CO 2 molecules to diffuse into the inner part of the filling amine in turn, thus reduce the amine utilization efficiency. Meso-PDVB-0.4PEHA from Meso-PDVB with abundant mesopores, exhibited the highest CO 2 adsorption capacity of 4.52 and 4.99 mmol/g with N efficiency of 0.61 and 0.67 under dry and wet condition, respectively. The excellent regeneration performance of Meso-PDVB-0.4PEHA, combined with its superior CO 2 adsorption capacity and ultra-high N efficiency, makes it a promising adsorbent for CO 2 capture from flue gas.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Jiaqi Su,Qianhan Ma,Yongjian Cai,Hao Li,Fang Yuan,Fazheng Ren,Pengjie Wang,Paul Van der Meeren
Plant-based diets are currently gaining more popularity among healthily- and environmentally-conscious consumers. Herein, we reported a facile and mild method to fabricate high internal phase emulsions (HIPEs) using plant-based ingredients that feature the physical and sensory of traditional egg-based mayonnaise through interfacial engineering . Protein-polysaccharide-surfactant ternary composite particles with appropriate dimension and moderate wettability were constructed by regulating the ratios among zein, corn fiber gum (CFG) and lecithin (Lc). The resultant Zein-CFG-Lc particles (ZCLPs) could function as not only particulate emulsifiers, sterically hindering the close approach of droplets, but also surfactants that decreased the interfacial tension through molecular rearrangement at the oil-water interface. HIPEs with a droplet size less than 3.0 μm (the threshold value of granular sensation by oral cavity) were successfully fabricated under a minimum ZCLPs concentration of 1.2%. The specific interfacial architecture was observed with the combination of zein particles, a CFG network and Lc-based membrane, which jointly contributed to conserve a high concentration of oil phase. HIPEs were determined with a lower tribological property compared to egg-based mayonnaise , endowing them with more creaminess and smoothness sensory attributes. In addition, HIPEs exhibited an extremely higher physical and thermal stability than the mayonnaise. In vitro digestion fate indicated that the digestible fat in HIPEs could arrive at a minimal value of one-twelfth of that in the mayonnaise as ZCLPs could effectively inhibit the lipid digestion of HIPEs in the small intestine, making it a low-calorie formulation. This study opens a promising pathway for producing edible HIPEs as replacers for egg-based mayonnaise appealing to calorie-sensitive consumers and plant-based diet lovers.
研究领域:
食品科学
·
界面化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）