COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Guojun Lv,Yan Chen,Xuyang Zou,Jiangzhang Wang,Tao Wang,Xubin Zhang,Fumin Wang
There are few reports concentrated on the interactions between lipophilic surfactants and hydrophobized hollow TS-1 zeolite particles in the stabilization of emulsions. In this study, hydrophobized hollow TS-1 zeolite particles were synthesized and applied as emulsifier to stabilize the W/O Pickering emulsions employing cyclohexanone and water, and the influence of addition of lipophilic Span 80 on the stability of the W/O Pickering emulsions was systematically studied. Surprisingly, a phase inversion was induced by simply changing the Span 80 concentration. At fixed concentration of TS-1 zeolite particles (2 wt%), emulsions are water in oil (W/O) when the concentration of Span 80 is lower than 0.5 mM. Then the emulsions invert to oil in water (O/W) when the Span 80 concentration is between 1 mM and 8 mM. In this process, different emulsifiers dominate the composition of the interfacial layer, and the emulsion type is correspondingly controlled. When Span 80 concentration is lower than 0.5 mM, hydrophobized hollow TS-1 zeolite particles are in domination, and W/O emulsions are obtained. At Span 80 concentration of 1–8 mM, the emulsions are stabilized mainly by Span 80, and the emulsion type is O/W.
研究领域:
化学工程
·
材料科学
·
界面化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Lixia Liu,Fei Shen,Xiangrong Chen,Jianquan Luo,Yi Su,Huanhuan Wu,Yinhua Wan
Surface hydrophobic modifications of hydrophilic porous polyacrylonitrile (PAN) membranes for vacuum membrane distillation (VMD) desalination via dipping in fluorine-containing solution followed by plasma irradiation were studied. 1H, 1H, 2H, 2H-perfluorodecyl methacrylate (F8) was used as the monomer . The monomer was not vaporized in this work, which might make the modification process more economic and environment friendly. The surface hydrophobicity , morphology and VMD performance of the modified membranes were controlled by degree of grafting (DG), and a moderate DG value of 43.54 μg cm −2 was optimal. Before grafting F8, Ar plasma etching pretreatment of the pristine PAN membrane was also studied, which increased the membrane’s surface pore size, roughness, thus improving the VMD performance and stability of the finally modified membrane (PAN-EM). When a 3.5 wt% NaCl solution was treated by the PAN-EM membrane at 80 °C under vacuum degree of 95.2 kPa, a flux of 59.42 kg m −2 h −1 and a salt rejection of 99.93% were achieved. Moreover, the PAN-EM membrane showed a stable desalination performance during an 80 h intermittent VMD operation, indicating that the strategy consisting of etching, dipping and grafting developed in this study was very promising to fabricate porous and hydrophobic membranes with great application prospect for VMD desalination.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 61
·期 3
·731-741
·
IF 1.917
Aixue Dong,Huimin Wu,Ruirui Liu,Qiang Wang,Xuerong Fan,Zhen Dong
In this study, nonpolar octyl gallate (OG), dodecyl gallate (DG), and octadecyl gallate (OCG) were grafted onto the surface of hydrophilic jute fabrics, which were mediated by horseradish peroxidase to improve the hydrophobicity of jute materials. The gallate-grafted jutes were characterized by infrared spectroscopy and grafting percentage (Gp), and the hydrophobic properties were evaluated by water contact angle and wetting time measurements. The Gps determined by saponification was 3.91%, 5.12%, and 4.58% for OG, DG, and OCG, respectively. The nonpolar chain length and the grafting rate of the monomers had a considerable effect on the hydrophobicity of the modified jute fabrics. The as-prepared hydrophobized jute fabrics had superior interfacial compatibility with nonpolar resins, such as polypropylene (PP) and polylactic acid (PLA) making them most suitable to be utilized in the development of jute fiber-reinforced thermoplastic composites. The tensile and dynamic mechanical properties of the grafted jute/PP or jute/PLA composites were improved compared with pure PP, PLA, and non-modified jute composites.
研究领域:
材料科学
·
生物化学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Zidan Luo,Mengfei Tian,Naveed Ahmad,Wu Qiu,Yu Zhang,Chunying Li,Chunjian Zhao
In this study, a switchable temperature-responsive ionic liquid-based surfactant-free microemulsion (TRIL-SFME) for extraction and in-situ separation of hydrophilic and lipophilic compounds from Camptotheca acuminata was firstly developed and systematically characterized. This TRIL-SFME was obtained using 1-hexyl-3-methylimidazolium tetrafluoroborate ([HMIM][BF 4 ]), 1,2-propanediol and H 2 O. The prepared TRIL-SFME presented low viscosity and rapid response to temperature. Firstly, the effect of temperatures on TRIL-SFME phase behavior was studied followed by determination of effect of liquid/solid ratio and extraction time on the extraction yields of the targeted compounds. The TRIL-SFME demulsified rapidly by thermal stimulus, resulting in in-situ separation and enrichment of compounds with varying polarity. The results of present study revealed that TRIL-SFME had higher extraction yields (1.50–5.79 folds) compared to traditional solvents and individual components of TRIL-SFME. Besides, in-situ separation and enrichment of hydrophilic compounds (phenolic acids) and lipophilic compounds (alkaloids) was accomplished in short time (within 3 min) by cooling the system to 4 ℃. Furthermore, the mesoscopic behavior between TRIL-SFME and targeted compounds was simulated by dissipative particle dynamics (DPD) to explore the extraction mechanism for the first time. The results illustrated the formation of W/IL structure of TRIL-SFME and clarified solubilization mechanism of TRIL-SFME system for targeted compounds, which is related to its special "water pool" structure. This novel and switchable TRIL-SFME is an environmentally friendly and promising alternative to simultaneously extract, in-situ separate and enrich the natural active compounds with different polarity from plant matrices.
研究领域:
植物化学
·
分离科学
·
药物化学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Yuan Sheng,Wenxing Zhu,Zhijian Li,Shuo Li,Liangbin Shao,Jianguo Wang
Green hydrogen production by alkaline water electrolysis is an important technology in the decarbonization of the current industry. However, its large-scale application is limited by mediocre performance of conventional Raney Ni electrocatalysts. Herein, high-performance NiMoZn alloy catalysts of the Raney Ni type are developed by pulse electrodeposition for the hydrogen evolution reaction (HER). The optimized catalyst, NMZ-CA, exhibits an overpotential of 37 mV at 10 mA⋅cm −2 and a Tafel slope of 27 mV⋅dec −1 in 1 mol·L –1 KOH. Tafel slope measurements, X-ray photoelectron spectroscopy, and H 2 temperature-programmed desorption experiments show that the incorporation of Mo and Zn in Ni weakens the binding of HER intermediate (H ads ) on strongly adsorbing sites, leading to improved electrochemical kinetics. Electron microscopy and X-ray diffraction study reveals that a phase-pure Mo-doped Ni 2 Zn 11 intermetallic precatalyst formed via pulse electrodeposition and subsequent heat treatment is key to the structure integrity and performance of the catalyst after activation by alkaline leaching. Modification of NMZ-CA with PTFE enhances its HER performance by facilitating gas removal and improving structure integrity. A practical alkaline water electrolyzer built on the modified NMZ/PTFE-CA electrode delivers 2.0 A⋅cm −2 at 1.92 V cell voltage and operates for 250 h without decay. This work provides insights into the synergy between Ni, Mo, and Zn in Raney Ni-type catalysts, and demonstrates the hydrophobic modification as an effective strategy for electrode development in high-performance alkaline water electrolysis.
研究领域:
材料科学
·
电化学
·
能源化学
·
催化化学
·
纳米材料
·
可再生能源
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Yao Meng,Hui Wang,Xinxing Wu,Haiping Yu,Shaobo Lou,Fangli Sun,Shuaibo Han,Yan Zhang,Hongchang Xu
Hydrophobic modifications of bamboo could negate its hygroscopicity to improve the durability of bamboo products . Dodecyl gallate (DG), a plant-based hydrophobic reagent, can be used to increase the hydrophobicity of bamboo, but the lack of bonding attachments restricts its efficiency. Herein, for the first time, an integrated strategy of bamboo hydrophobic modification was established using hydrothermal pretreatment coupled with laccase-catalyzed DG modification. The results showed the hydrophobicity was increased from 36.0° to 117.9° and the stable hydrophobic time of bamboo increased up to 6 times after modification. A significant antibacterial property and improvement of mold resistance were observed from modified bamboo, which were caused by DG bonding with bamboo. The results of hydrothermal pretreatment shown that lignin migrated to bamboo surface and accompanied with a concentration increase from 54.3% to 72.8%, which was beneficial to fixing DG for conferring its multiple performances. The reaction between bamboo lignin and DG confirmed that lignin as the targeted biopolymers within bamboo constituents, and ether bonds were identified as the primary connections between DG and bamboo lignin via multiple characterization methods. This study demonstrated a reliable hydrophobic modification avenue to improve antimicrobial properties and shed new light on bamboo pretreatment and laccase-catalyzed modification.
研究领域:
材料科学
·
生物材料
·
化学工程
·
生物技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Tingjie Yin,Yanqi Liu,Mengnan Yang,Lei Wang,Jianping Zhou,Meirong Huo
Despite the great potential of combination therapy based on siRNA and chemotherapeutics, an efficient vehicle with abilities of well drug co-loading, synchronizing in vivo trafficking, and target-specific co-burst release remains elusive, which results in a suboptimal synergistic potency. Herein, a novel chitosan amphiphile (PEI-ss-HECS-ss-OA, HSPO) with glutathione (GSH)-reversible cationization and hydrophobicization by polyethylenimine (PEI) and octylamine (OA), respectively, was developed for this purpose. HSPO spontaneously assembled in aqueous solution to be a micellar system and effectively co-encapsulated the two drugs with an adjustable dosage ratio. With a surface charge inversion strategy by hyaluronic acid (HA) coating, the HA(HSPO) co-delivery micelles with a negative surface charge (−21.45 ± 1.44 mV) and suitable size (192.52 ± 7.41 nm) selectively accumulated into CD44 overexpressed A549 tumors through a combination of passive and active targeting mechanism. Then, tumor cytoplasm-selective co-burst release was obtained through GSH triggered collapse of the amphiphilic assembly alongside a decrease of positive charge condensation, finally leading to an enhanced synergistic antitumor effect with a superior inhibition ratio of 86.63%. Overall, this study validated the great promise of HSPO as an efficient site-specific rapid co-trafficking vehicle of siRNA and chemotherapeutics for a remarkable synergistic tumor inhibition.
研究领域:
药剂学
·
癌症研究
·
纳米医学
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Hao Zhou,Lingmei Dai,Dehua Liu,Wei Du
MOF-derived carbon has extraordinary advantages including highly ordered morphology inherited from MOFs and improved chemical stability arising from its carbon nature, which may be a promising immobilized enzyme carrier. Herein, we prepared two MOF-derived carbon materials of different structures for the immobilization of lipase from Eversa® Transform 2.0 and systematically evaluated their application potential in biodiesel production system. Compared with C-C (derived from conventional microporous ZIF-8), 3DOM-C (derived from 3D ordered macro-microporous ZIF-8) exhibited superior immobilization performance with an 145.1% increase in enzyme loading and an 130.2% increase in activity. Moreover, lipase immobilized on 3DOM-C ( [email protected] ) showed better catalytic performance than [email protected] , with faster conversion rate in lipase-mediated biodiesel production. Remarkably, the higher surface hydrophobicity of the [email protected] was proved to be the key factor in its improved catalytic performance. Meanwhile, we found that the affinity between immobilized enzyme molecules and water significantly weakened the hydrophobicity of [email protected] and [email protected] , which could be of adverse effect on their application in biodiesel production. To enhance the hydrophobicity of immobilized lipase biocatalyst, a facile post-immobilization hydrophobic modification strategy was proposed by coating the [email protected] with polydimethylsiloxane (PDMS). The as obtained super hydrophobic [email protected] @PDMS biocatalyst showed excellent catalytic performance in biodiesel production, with a much higher initial reaction rate, which was 3.3 folds of that catalyzed by [email protected] , and 1.8 folds of that catalyzed by [email protected] . This work shed light on the great potential of constructing MOF-derived hierarchically ordered porous carbon for enzyme immobilization in extensive practical applications.
研究领域:
材料科学
·
生物技术
·
化学工程
·
酶技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiawei Wei,Ruru Liu,Fang Wang,Xiangying Chen,Zhongjie Zhang
In present work, citric acid was used as a cross-linking agent to perform surface hydrophobization of magnesium oxysulfate (MOS) whiskers and bamboo flour (BF), producing PP/MOS/BF ternary composites via melt extrusion and injection molding processes. The results show that MOS increase the crystallization temperature, melting temperature, and degree of crystallinity of the composites, acting as heterogeneous nucleation agents. BF inhibits the crystallization process of PP, but when compounded with MOS, it enhances the crystallization performance of the ternary composites, leading to an increase in crystallinity. Additionally, the rigidity of MOS and the flexibility of BF synergistically enhance the adhesion between PP and the filler, thereby improving the mechanical properties of the ternary composites. Furthermore, the storage modulus and loss modulus of the ternary composites increase, while the loss factor and bonding factor decrease, with no significant change in the glass transition temperature. The good compatibility and bonding strength generated between MOS whiskers, BF, and PP result in optimal dynamic mechanics. For the M-B-30-3:1 sample, its tensile performance reaches 33.74 MPa, as well as bending strength and notched impact strength of 28.87 MPa and 9.77 kJ/m 2 , respectively.
研究领域:
材料科学
·
高分子科学
·
复合材料
·
表面化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Yi Bo,Li Tianjie,Yang Boguang,Chen Sirong,Zhao Jianyang,Zhao Pengchao,Zhang Kunyu,Wang Yi,Wang Zuankai,Bian Liming
Effective and easy regulation of hydrogel surface properties without changing the overall chemical composition is important for their diverse applications but remains challenging to achieve. We report a generalizable strategy to reconfigure hydrogel surface networks based on hydrogel–substrate interface dynamics for manipulation of hydrogel surface wettability and bioadhesion. We show that the grafting of hydrophobic yet flexible polymeric chains on mold substrates can significantly elevate the content of hydrophobic polymer backbones and reduce the presence of polar groups in hydrogel surface networks, thereby transforming the otherwise hydrophilic hydrogel surface into a hydrophobic surface. Experimental results show that the grafted highly dynamic hydrophobic chains achieved with optimal grafting density, chain length, and chain structure are critical for such substantial hydrogel surface network reconfiguration. Molecular dynamics simulations further reveal the atomistic details of the hydrogel network reconfiguration induced by the dynamic interface interactions. The hydrogels prepared using our strategy show substantially enhanced bioadhesion and transdermal delivery compared with the hydrogels of the same chemical composition but fabricated via the conventional method. Our findings provide important insights into the dynamic hydrogel–substrate interactions and are instrumental to the preparation of hydrogels with custom surface properties.
研究领域:
材料科学
·
生物材料
·
高分子科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-10
·
IF 5.228
Hu H. W.,Tang G. H.,Niu D.
Recovery of both latent heat and condensate from boiler flue gas is significant for improving boiler efficiency and water conservation. The condensation experiments are carried out to investigate the simultaneous heat and mass transfer across the nanoporous ceramic membranes (NPCMs) which are treated to be hydrophilic and hydrophobic surfaces using the semicontinuous supercritical reactions. The effects of typical parameters including coolant flow rate, vapor/nitrogen gas mixture temperature, water vapor volume fraction and transmembrane pressure on heat and mass transfer performance are studied. The experimental results show that the hydrophilic NPCM exhibits higher performances of condensation heat transfer and condensate recovery. However, the hydrophobic modification results in remarkable degradation of heat and condensate recovery from the mixture. Molecular dynamics simulations are conducted to establish a hydrophilic/hydrophobic nanopore/water liquid system, and the infiltration characteristics of the single hydrophilic/hydrophobic nanopore is revealed.
研究领域:
热能工程
·
膜科学与技术
·
化学工程
·
能源高效利用
·
环境工程
·
材料科学
·
传热传质学
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2019
·Vol. 7
·期 12
·5035-5043
·
IF 5.251
Lin Liu,Hengchong Shi,Huan Yu,Rongtao Zhou,Jinghua Yin,Shifang Luan
Catheter-associated infections (CAIs) caused by bacterial colonization are significant problems in clinics. Thus, effective antibacterial coatings for biomedical catheters to prevent bacterial infections are urgently needed. Ideal coatings should include the advantage of potent antibacterial properties and being easily and economically modified on the catheter surface. Due to their advantages of adhesive capability on various substrates, an increasing number of coatings based on plant polyphenols have been developed. However, the hydrophilicity of plant polyphenols limits their utilization in coatings. Herein, hydrophobic tannic acid (TA) was synthesized via the one-step electrostatic assembly of TA and benzalkonium chloride (BAC) with the green solvent water as the medium. The as-prepared hydrophobic TA (TBA) facilely formed a stable and colorless coating on the luminal and outer surface of biomedical catheters with broad-spectrum antibacterial activity and biocompatiblity. It was demonstrated that the TBA-coated surfaces displayed excellent bactericidal activity toward Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli), and more than 99% of the above bacteria were killed by the TBA-coated films. The test of the coated catheters in vitro also showed the excellent antibacterial activity of both the outer and luminal surfaces of the catheter. Moreover, in an in vivo mouse model, the coated catheters relatively prevented bacterial colonization compared to the uncoated catheters. Meantime, no significant cytotoxicity and host response for Cell Counting Kit-8 (CCK-8) and tissue compatibility in vivo were observed, indicating the better biocompatibility of the TBA coating. This preparation method overcomes the limitation of the traditional hydrophilic tannic acid as a coating and provides a new method for preventing medical indwelling device-associated infections.
研究领域:
生物医学工程
·
材料科学
·
微生物学
·
医疗器械
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）