Journal of Water Process Engineering
·
2024
·
IF 6.3
Mengyao Wu,Xiaoshuang Li,Daokun Wen,Yunxiang Ma,Peize Yang,Zhen Zhang,Bing Geng,Hui Li
Superhydrophobic materials that can withstand harsh environments are critical in oil spills. Here, fluorinated superhydrophobic monoliths were prepared in one step based on a high internal phase emulsion (HIPE) templating method. γ-methacryloyloxypropyltrimethoxysilane (KH570)-modified Fe 3 O 4 nanoparticles were added into the emulsion as co-stabilizers and participated in the composition of micro-nano hierarchical structures. The fluorinated alkyl backbone and rough structure enabled the foam to exhibit excellent superhydrophobicity with a water contact angle (WCA) of 153.5° and a sliding angle (SA) of 5.92°. The unique structure and composition of the foam allowed it to maintain stable superhydrophobicity (153.97°) even after severe sandpaper abrasion tests (Drawn 10 m at 7.1 kPa on P400 grit sandpaper). It also demonstrated exceptional hydrophobicity to strong acids, bases, and UV light. The oil-saturated material can be regenerated through a simple extrusion process, showing outstanding reusability. After ten cycles of oil adsorption, the adsorption capacity remains above 90 % of the initial value. The additional magnetic properties of the material enable it to remove oil in confined or hazardous conditions. More importantly, with the assistance of a vacuum pump, the material permits continuous separation of organic solvents from the water. These excellent properties of the foam make it a potential material for treating wastewater.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Haorui Liu,Xiaoqiong Wang,Shixun Chen,Shuixia Chen
A novel solid amine adsorbent with interconnect open-cell porous structure was successfully synthesized by crosslinking polyethyleneimine (PEI) with ethylene glycol diglycidyl ether (EGDE) via high internal phase emulsion (HIPE) polymerization. The preparation conditions were optimized. The adsorption performance of the prepared adsorbent for CO 2 was evaluated by fixed bed dynamic adsorption experiment. The results indicated that the optimal adsorbent PEI70K-E-HIPE-8 exhibited a record high CO 2 adsorption capacity of 14.22 mmol/g, amine efficiency of 83% and ratio of breakthrough capacity to equilibrium capacity of 0.92 (abbreviated as Q b /Q e ratio). Both adsorption capacity and adsorption kinetics are much better than those of PEI70K-E-gel-8 prepared without using HIPE template. The adsorbent also showed good CO 2 /CH 4 separation performance, a CH 4 productivity of 54.84 mmol/g could be obtained while using PEI70K-E-HIPE-8 to separated it from a 20 mL CO 2 /CH 4 (20:80, v:v) mixed gas, remarkably higher than that of PEI70K-E-gel-8 (0.28 mmol/g). PEI70K-E-HIPE-8 could keep a stable adsorption and separation performance after at lease 15 adsorption-desorption cycles. The superior CO 2 adsorption capacity and adsorption kinetics make it a promising candidate in practical CO 2 adsorption and CO 2 /CH 4 separation application.
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
Regenerative Biomaterials
·
2024
·
IF 5.6
Wang Zhiwei,Sun Lingshun,Wang Weixing,Wang Zheng,Shi Ge,Dai Honglian,Yu Aixi
Diabetic wounds are a difficult medical challenge. Excessive secretion of matrix metalloproteinase-9 (MMP-9) in diabetic wounds further degrades the extracellular matrix (ECM) and growth factors and causes severe vascular damage, which seriously hinders diabetic wound healing. To solve these issues, a double-network porous hydrogel composed of poly (methyl methacrylate-co-acrylamide) (p(MMA-co-AM)) and polyvinyl alcohol (PVA) was constructed by the high internal phase emulsions (HIPE) technique for the delivery of potassium sucrose octasulfate (PSO), a drug that can inhibit matrix metalloproteinases (MMPs), increase angiogenesis, and improve microcirculation. The hydrogel possessed a typical polyHIPE hierarchical microstructure with interconnected porous morphologies, high porosity, high specific surface area, excellent mechanical properties, and suitable swelling properties. Meanwhile, the p(MMA-co-AM)/PVA@PSO hydrogel showed high drug-loading performance and effective PSO release. In addition, both in vitro and in vivo studies showed that the p(MMA-co-AM)/PVA@PSO hydrogel had good biocompatibility and significantly accelerated diabetic wound healing by inhibiting excessive MMP-9 in diabetic wounds, increasing growth factor secretion, improving vascularization, increasing collagen deposition, and promoting re-epithelialization. Therefore, this study provided a reliable therapeutic strategy for diabetic wound healing, some theoretical basis, and new insights for the rational design and preparation of wound hydrogel dressings with high porosity, high drug-loading performance, and excellent mechanical properties.
研究领域:
材料科学
·
生物医学工程
·
药剂学
·
伤口愈合
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Shuoyu Wang,Xianyu Qiu,Yangguan Chen,Shuixia Chen
Amine-functionalized porous adsorbent is one kind of important materials in carbon dioxide capture due to its stability and efficiency. In this study, a copolymer (polyHIPE) with interconnected macropore networks, hierarchical porous structure and abundant branched amino groups was prepared by high internal phase emulsion (HIPE) strategy via copolymerization of styrene (St), divinylbenzene (DVB), tetraethyl orthosilicate (TEOS), and triethoxyvinylsilane (VTEO), and then a novel amine-functionalized CO 2 adsorbent was synthesized by in situ ring-opening grafting copolymerization of aziridine with the polyHIPE. The structure, morphology, and physicochemical properties of the polyHIPEs were characterized by FTIR, TEM, TGA , and SEM. The key roles of VTEO and TEOS in introducing active hydroxyl groups onto the surface of the inert polymer was evaluated, which was essential to improve the hydrophilicity of the polyHIPE and to provide reactive sites to combine with amine agents. The contact angle of the polyHIPE while copolymerized with TEOS and VTEO significantly was decreased from 144° to 72°. In order to further increase the specific surface area of the polyHIPEs, post crosslinking of polyHIPEs was implemented through a Friedel–Crafts reaction. The specific surface area of post-crosslinked polyHIPE could reach 513 m 2 /g, which was proven to be effective to enhance its CO 2 adsorption capacity. Finally, the abundant branched amino sites via aziridine grafting and high surface area greatly enhanced CO 2 adsorption capacity of the amino-modified polyHIPEs. The adsorption capacity of 2.40 and 3.25 mmol CO 2 /g could be achieved under dry and humid conditions in 0.1 atm partial pressure of CO 2 , respectively.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）