SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Haoji Jiang,Wenxiong Shi,Qiang Liu,Heyun Wang,Jialu Li,Chunlin Wu,Yingchun Li,Zhong Wei
In order to investigate the effects of MOFs by altering ligands with various functional groups on separation selection in pervaporation dehydration, three hydrophilic UiO-66-X nanoparticles were respectively synthesized and blended into poly (vinyl alcohol) matrix to fabricate water-selective membrane for ethanol dehydration via PV technology. Both the experimental and molecular simulation results confirmed the UiO-66-X counterbalancing factors of enhanced polarity and suitable pore size gave rise to the optimal performance in ethanol dehydration. The PV performances could be tuned by the type and quantity of functional groups carried by UiO-66-X nanoparticles. As a result, the pore aperture of UiO-66-(COOH) 2 nanoparticles provided continuous channel for water diffusion, and water molecules could also be activated attributed to the strong interaction between the UiO-66-(COOH) 2 nanoparticles and water molecules which enhanced the penetration and diffusion of water molecular in hybrid membrane to increase the water flux. The optimized hybrid membranes with UiO-66-(COOH) 2 loading of 8 wt% exhibited the total flux of 979 ± 7 g/(m 2 ·h) and a separation factor of 2084 ± 21.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongfa Duan,Xiaochi Liu,Lulu Bian,Zhongyi Li,Ning Li,Muhammad Umair Sial,Zhe Sun,Haiqiang Gao,Beixing Li,Daxia Zhang,Feng Liu
The preparation of pesticide-loaded microcapsules using biodegradable polymers and the balance between their sustained-release performance and small-size effects represent an effective strategy to enhance pesticide utilization efficiency. This study devised a one-step sol-gel self-assembly approach to fabricate abamectin-loaded microcapsules using biodegradable polyvinyl alcohol (PVA) and butylated hydroxytoluene (BHT) as raw materials. The results demonstrated that the reaction through hydrogen bonding by PVA and BHT at the o/w interface could generate shells and encapsulate pesticides to make microcapsules. Increasing PVA usage could reduce the particle size and enhance shell stability. The addition of BHT also improved the shell structure stability and encapsulation efficiency, whereas 3 %–7 % concentrations impeded the formation of the shell structure. Abamectin, which has a self-polymerizing ability, also increases microcapsule stability. A 54 °C temperature increase was maintained for 24 h to induce emulsion separation. Subsequent cooling and agitation prompts the reconstitution of pesticide-loaded microcapsules. The synergistic effect of the water-responsive mechanism, high encapsulation efficiency, and thicker shells endows nano-formulations with superior sustained-release performance compared to micro-scale formulations. The photostability of abamectin nanocapsules is significantly enhanced by 68.26 % compared to conventional suspensions, and the content of active ingredients remains at 50.54 % after 60 h of release under light conditions. Owing to their nanoscale sustained-release characteristics, their biological safety is improved by 36.43 %. The encapsulated Aba@BHT-PVA nano-system, leveraging excellent rainwater erosion resistance and leaf surface affinity, significantly prolongs its leaf retention time. Synergizing with the small-size effect, it demonstrates substantial enhancement in both the control efficacy and persistence against Plutella xylostella . Owing to its unique properties and easy regulation, this fabrication technique has great application value in the future.
研究领域:
农药化学
·
纳米材料
·
药物递送系统
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Dan Liu,Jiajun Qiu,Ru Xu,Junyu Liu,Jiayin Feng,Liping Ouyang,Shi Qian,Yuqin Qiao,Xuanyong Liu
Bacterial infections in wounds often delay the healing process which threaten human health and life. The development of biocompatible hydrogels with antibacterial activity and self-healing to achieve excellent wound closure effectiveness is highly desirable in clinical applications. Herein, a new class of highly stretchable, biocompatible, and antibacterial hydrogel dressings called BPP hydrogel is designed and prepared by chemically cross-linking β-CD with PEI and then physically cross-linking with PVA. The BPP hydrogel exhibits superior properties including excellent antibacterial properties against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli , good biocompatibility for mouse fibroblasts , mouse embryonic fibroblasts and human umbilical vein endothelial cells, outstanding deformability and self-healing performance to protect the wound completely even in special scenes such as pulling and bending. Besides, after damage, the broken BPP hydrogel could heal together, and the healed BPP hydrogel could be stretched to 150% breaking deformation. Furthermore, in vivo experiments further verify that BPP hydrogel has excellent sterilization and healing effect on infectious wounds. This work proves that BPP hydrogel would be a promising material for wound healing and has good prospect for clinical translation.
研究领域:
材料科学
·
医学
·
生物工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Qi Zhong,Guogui Shi,Qing Sun,Peng Mu,Jian Li
Most super-wetting membrane materials are susceptible to oil pollution after separation process, causing a serious degradation of the separation ability. The rough structure of underwater superoleophobic membrane can effectively improve anti-fouling property, thus achieving stable separation. Herein, a composite polyvinyl alcohol-graphene oxide-titanium dioxide (PVA-GO-TiO 2 , PGT) membrane with rough structure is prepared through a simple hydrothermal and suction-filtration method. The as-prepared PGT membrane displays outstanding underwater superoleophobicity even for high-adhesion crude oil. Moreover, the as-fabricated membrane exhibits efficient oil-in-water emulsions separation performance with separation efficiency of larger than 99.1% and permeation flux of over than 762 L m −2 h −1 even after 10 min. Besides, the PGT membrane could separate various oil-in-water emulsions in corrosive environments with separation efficiency of higher than 99.3% and permeation flux of more than 760 L m −2 h −1 . More importantly, the as-prepared membrane could keep the underwater superoleophobicity after sanding test (200 times) and bending test (500 times). The composite membrane with excellent oil-in-water emulsions separation performance, corrosion resistance and mechanical stability has broad prospects in the field of water purification .
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wei Chen,Pengfei Wang,Weike Jia,Huidan Zeng
Silicalite-1 zeolites/polymer composite membranes are among the most reliable materials for the pervaporation separation of m-X from xylene isomers. However, the separation factors of the present silicalite-1 zeolites/polymer composite membrane are low. This work has succeeded in fabricating dense and defect-free silicalite-1/PVA composite membrane for first improving the pervaporation separation performance of m-X/p-X isomers. The silicalite-1/PVA composite membrane was prepared by combining solution scraping and vacuum thermal crosslinking methods with fumaric acid as a crosslinker (denoted as silicalite-1/PVA-V). The silicalite-1/PVA-V composite membrane with a thickness of 15.3 μm, prepared with a fumaric acid/monomeric unit of PVA molar ratio of 0.05 after vacuum thermal crosslinking at 160 ℃ for 2 h, exhibited dense and defect-free structure with extremely low xylene swelling degree, good structural stability and mechanical properties as well as excellent pervaporation separation performance. Compared to the pure PVA membrane, the silicalite-1/PVA-V composite membrane exhibited better selective separation performance of m-X isomer. The temperature, amount of fumaric acid, crosslinking degree and membrane thickness significantly influenced the pervaporation separation performance. The optimum selective separation factor of m-X/p-X isomers and the corresponding total permeate flux were about 9.85 and 59.15 g·m −2 ·h −1 (60 ℃), respectively. The pervaporation experiments of long-time and repetitively prepared membrane demonstrated that the silicalite-1/PVA-V composite membrane had long-term structural stability and reproducibility. To demonstrate scalability, we showed that our strategy could produce large-size silicalite-1/PVA-V composite membrane with an area of 1000 cm 2 , which exhibited m-X separation performance similar to that of small membrane coupons. The present work provided a potentially scalable method for producing high-quality silicalite-1/PVA composite membrane for enhancing the pervaporation separation performance of m-X from xylene isomers.
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
ACS Applied Polymer Materials
·
2023
·
IF 5
Boyuan Chen,Hui Zhang,Lijuan Li,Yingcheng Hu
Nano-cellulose aerogels have low densities, high porosities, and strong absorption capacities, making them suitable for cleaning up oil and chemical spills in oceans. However, their weak lipophilicity and poor mechanical properties often limit their applications. We attempted to introduce long-chain polymers on the nanocellulose/polyvinyl alcohol (CNF/PVA) surface for the hydrophobic modification of aerogels. In this paper, PVA/CNF was silylated by introducing hydrolyzed ethyltrimethoxysilane to increase its hydrophobicity. Aerogels with interpenetrating pore structures were prepared by a directional freezing method. The aerogels had a high strength in the freezing direction and high compressive elasticity in the direction perpendicular to the freezing direction. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and water contact angle (148°) tests demonstrated the successful silylation of the aerogel surface. The aerogel absorbed oil and some organic solvents 50–110 times higher than its own weight. It showed good reusability, with an absorption loss rate of 20% after 40 squeezing cycles. This green and sustainable method is inexpensive and has a short production cycle. In addition, the absorption of alcohols and lipids by aerogels can be used as a carrier for surgical drugs.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2016
·Vol. 92
·期 4
·515-522
·
IF 2.008
Yanmei Luo,Yiru Jia,Dexian Zhang,Xinjian Cheng
TiO 2 /PVA composite nanofiber mat was prepared via an electrospinning technology. SH-TiO 2 -SiO 2 hybrid particles and PVA solution were injected through a coaxial syringe, yielding a composite nanofiber mat. The as-prepared SH-TiO 2 -SiO 2 /PVA composite nanofiber mat was immersed in Cd 2+ cation solution and S 2− anion solution in turn. Thus, yellow TiO 2 @CdS/PVA composite nanofiber mats were prepared. By adjusting the number of times a mat was immersed in the Cd 2+ and S 2− solutions, different amounts of CdS particles attaching to the mats were obtained. Both SH-TiO 2 -SiO 2 /PVA and TiO 2 @CdS/PVA composite nanofiber mats were employed to catalyze the photodegradation of a model dye, methylene blue. The photodegradation performance could be greatly enhanced by the introduction of CdS particles anchoring onto TiO 2 particles. The photodegradation efficiency reached 99.2% within 180 min. Also, the nanofiber mat could be recycled and reused at least 10 times. The photodegradation efficiency of TiO 2 @CdS/PVA composite nanofiber mats remained 68.8% for 10 cycles.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Arabian Journal of Chemistry
·
2022
·
IF 6.212
Zhenzhong Zang,Shichun Zhao,Ming Yang,Chengqun Yu,Hui Ouyang,Lihua Chen,Weifeng Zhu,Zheng-gen Liao,Abid Naeem,Yongmei Guan
Honeysuckle is a commonly used Chinese medicine for treating intestinal inflammation and other diseases. Compounds that are absorbed into the blood produce pharmacodynamic effects. However, it is still unclear which compounds in honeysuckle are absorbed into the blood. Thus, the purpose of this study was to investigate the composition and in vivo absorption of active components in honeysuckle in male Sprague-Dawley rats, and develop a controlled release hydrogel system. UPLC-LTQ-Orbitrap-MS was used to determine the active ingredients of honeysuckle in vitro and in vivo . A total of 80, out of which 42 components were found to be absorbed into the blood, which includes flavonoids, iridoids, organic acids and other compounds. FTIR analysis confirmed crosslinking between hydrogel content and drug loading, and TGA and DSC analysis indicated a high thermal stability. XRD analysis showed a decrease in crystallinity following crosslinking, and SEM revealed an irregular and hard surface. The maximum swelling and drug release were observed at pH 7.4 as compared to pH 1.2. The identified blood components can be used to determine Q-markers, while the prepared hydrogels can serve as an effective and promising carrier for the controlled release of honeysuckle extracts.
研究领域:
中药学
·
药剂学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 20
·2451-2461
·
IF 3.4
Jingda Huang,Shite Lin,Yipeng Liang,Enfu Wang,Yu Miao,Wenbiao Zhang,Kuichuan Sheng
It is still a serious challenge to construct a water-soluble polymer-based air filtration membrane with high efficiency and good mechanical properties by electrospinning. In the study, using polyvinyl alcohol (PVA) and polyacetylimide (PEI) as the main materials, both nanocellulosic crystal (CNC) and zinc oxide (ZnO) as the synergistic reinforcers and methyltrimethoxysilane (MTMS) as the hydrophobic modifier, the electrospun PVA/PEI/CNC/ZnO composite nanofibrous membrane with dual air filtration mechanisms was established. One of the mechanisms was the interception of the three-dimensional network structure built by the composite nanofibrous membrane, the other was the electrostatic adsorption provided by CNC. Based on the dual air filtration mechanisms, the filtration efficiency of particulate matter 2.5 (PM2.5) reached 98.20%. Moreover, the composite nanofibrous membrane displayed a good thermal stability and could still maintain more than the filtration efficiency of 83% and low-pressure drop after treatment at 200 °C for 1 h. Moreover, the composite nanofibrous membrane could still maintain the filtration efficiency (97.3%) and low-pressure drop (110.7 Pa) after five washing cycles after filtration, reflecting good reusability. Interestingly, the PVA/PEI/CNC/ZnO composite nanofibrous membrane was simple to produce and demonstrated excellent filtration efficiency, as well as excellent thermal stability, which could be an effective barrier against PM2.5 invasion. Graphical
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Jianming Zhao,Miaojie Shi,Yajie Xie,Chao Ning,Kun Qiao,Runzheng Jiang,Abudureheman Bahatibieke,Yudong Zheng
To engineer a hydrogel elastomer for use as an in vivo tissue replacement, it is imperative to ensure superior fatigue resistance, guaranteeing a prolonged service life. Investigating the molecular mechanisms of strain energy accumulation and transmission, which occur during the compression of elastomeric materials, is instrumental in elucidating the causes of hydrogel material fatigue. Such insights are of immense value for the development of durable artificial tissue replacements, ensuring their longevity and sustained functionality within the human body. We synthesized hydrogel elastomers through polyvinyl alcohol (PVA) and waterborne polyurethane (WPU) with good biocompatibility, and studied their fatigue behavior through molecular dynamics (MD). The results of this analysis demonstrate that the introduction of energy dissipation structures between mechanically supported molecular frameworks can enhance the relaxation efficiency of polymers. This improvement leads to enhanced resistance of hydrogels to compression fatigue. A total of 1,000,000 cycles of compression tests were conducted to verify that WPU/PVA did not exhibit any significant compression fatigue under high stress of 50 % strain. In contrast, PVA hydrogel exhibited obvious fatigue due to the absence of an energy dissipation structure. These results revealed the source of compression fatigue resistance of hydrogel elasticity and provided powerful guidance for the design and synthesis of artificial tissues.
研究领域:
生物材料学
·
分子生物学
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yun Dou,Elwathig A.M. Hassan,Shoujuan Wang,Magdi E. Gibril,Fangong Kong
In contemporary agriculture, eco-friendly mulching films present a promising alternative to conventional plastic mulching films. However, their potential is constrained by challenges related to limited biodegradation and barrier performance. Addressing these limitations, innovative lignin-carboxylated materials were employed as bio-based crosslinking agents to enhance diverse properties in the fabrication of PVA films. Alkali lignin was modified with diethylenetriaminepentaacetic acid (DTPA) to enhance its chemical reactivity. The abundance of carbonyl groups in modified lignin (Lig-DTPA) plays a significant role in establishing strong compatibility with PVA through covalent bonds. This interaction yielded remarkable enhancements, elevating both tensile strength and tensile modulus by an impressive 50.9 % and 60.1 %, respectively. The introduction of Lig-DTPA at 3 % into the PVA composite films resulted in excellent UV-blocking properties. Moreover, at 3 % ratios, the presence of lignin became visibly dispersed as clear spots across the film, indicating a relatively uniform state within the matrix. The study revealed a direct correlation: as the lignin content increased, the film exhibited heightened water solubility and enhanced biodegradability. The PVA/Lig-DTPA film displays promising potential for utilization as a mulching film material, offering anti-ultraviolet functionality and a high degradation rate. Furthermore, its versatility extends to potential applications in packaging materials, including seedling bowls, transplanting pots, and coating films for transportation purposes.
研究领域:
农业科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2023
·Vol. 17
·期 4
·1-12
·
IF 2.7
Huang Jingda,Wang Yi,Cai Yuxin,Liang Yipeng,Lin Shite,Wang Enfu,Zhong Jinhuan,Zhang Wenbiao,Sheng Kuichuan
It is still a challenge to prepare a water- and polymer-based electrospun air filter film with high efficiency filtration, low pressure drop, and good mechanical properties. To address this issue, polyvinyl alcohol (PVA) was employed as the main material, mixing polyethyleneimine (PEI), bamboo-based activated carbon (BAC) and cellulose nanocrystal (CNC) to construct the air filter film by electrostatic electrospinning. In this system, the negatively charged BAC and CNC are fixed in the system through bonding with the positively charged PEI, showing a double adsorption effect. One is the mechanical filtration of the porous network structure constructed by PVA@PEI electrospun nanofibers, and the other is the electrostatic adsorption of PM2.5 on the surface of BAC and CNC. It is significant that the resulting composite air filter displays a high filtration efficiency of 95.86%, a pressure drop of only 59 Pa, and good thermal stability. Moreover, the introduced methyltrimethoxysilane (MTMS) endows it with good water-resistance. Given these excellent performances, this system can provide theoretical and technical references for the development of water- and polymer-based electrospun air filter film.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）