SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuzhe Cao,Xunkai Zhu,Zejuan Ni,Bo Ge,Wei Li,Guina Ren,Xiao Miao,Xin Shao,Cancan Liu
Freshwater has become a rare resource on account of population increase and environmental pollution. At present, most the solar-driven interfacial evaporators used for water polluted by organic solvents and dyes have an outstanding nature of clean water production due to their special design. However, its downside is that contaminants remaining in the residual polluted water cannot be removed. Herein, a device applied to water polluted by organic solvents and dyes is formed by a hydrogel-based interfacial evaporator (PVA hydrogel/CNTs) and non-wetting fabric. The photodegradation efficiency of the non-wetting fabric is 95.7% for Rh B dye after five cycles. Meanwhile, the organic solvents including toluene, cyclohexane and so on are cleared through the non-wetting fabric. Importantly, the device presents a clean water production rate of 1.73 kg·m −2 ·h −1 under 1 sun illumination and it has a freshwater produce rate of 1.63 kg·m −2 ·h −1 after 6 h of desalination experiments. Furthermore, the device displays the performance of salt resistance in a 3 h NaCl dissolution experiment. A new strategy is provided for interfacial water evaporation technology used for water dyed by organic solvents and dyes purification and has a great application potential.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
BIOMATERIALS
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2024
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IF 12.8
Bingxu Zhang,Xujian Li,Chuan Jiang,Chuanguang Wang,Haifeng Que,Cheng Zheng,Zhixiao Ji,Xudong Tao,Hongtao Xu,Changcan Shi
The effective prevention and treatment of anastomotic leakage after intestinal anastomosis for colorectal diseases is still a major clinical challenge. In order to assist intestinal anastomosis healing and avoid anastomotic leakage caused by high tension, low blood supply or infection, we designed a double-layer nanofiber intestinal anastomosis scaffold, which was composed of electrospun PTMC/PHA nanofibers as the main layer, and electrospun PVA/OHA-Gs nanofibers with antibacterial properties as the antibacterial surface layer. This double-layer scaffold has good toughness, its maximum tensile force value could reach 8 N, elongation could reach 400 %, and it has hydrophilic properties, and its contact angle was about 60°. On the basis of reducing anastomotic tension and isolating intestinal contents, this double-layer nanofiber anastomotic scaffold not only played an antibacterial effect in the short term after surgery to reduce inflammatory response, but also had the characteristics of multiple three-dimensional network structure like extracellular matrix which could promote tissue healing. The PVA/OHA-Gs@PTMC/PHA scaffold was implanted into a rabbit model simulating mechanical intestinal obstruction, and the results showed that the nanofibers of the scaffold could be degraded in vivo while maintaining a certain stability, that is, the overall structure of the PVA/OHA-Gs@PTMC/PHA scaffold would not shrink and deform due to degradation in a certain period of time. Therefore, the treatment with this scaffold showed better healing at the anastomotic site. Compared to the direct anastomosis group and pure PTMC scaffold group, the double-layer scaffold group promoted a faster return to normal anastomotic strength within 7 days. This PVA/OHA-Gs@PTMC/PHA double-layer nanofiber flexible scaffold appears to be a promising therapeutic strategy to prevent anastomotic leakage after intestinal anastomosis.
研究领域:
生物医学工程
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组织工程
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外科手术研究
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产品关联
DOI
PubMed
高影响因子
iScience
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2023
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IF 5.8
Han Wang,Dongtian Miao,Yongjiang Yu,Zhihan Zhang,Youlong Zhu,Qing Wang
Lead (Pb(II)) contamination is common in liquid foods and can result from Pb(II) being present in the raw materials or during handling processes. However, due to the complexity of food matrices, there is limited data available concerning Pb(II) ion removal from food sources. This study focused on fabricating a PVA/PAA/DMTD electrospun nanofibrous membrane (ENFM) to efficiently and selectively remove Pb(II) ions from liquid foods. The PVA/PAA/DMTD ENFM had a maximum adsorption capacity of 138.3 mg/g for Pb(II) ions and demonstrated high selectivity toward the removal of Pb(II) ions. Negative values of the Gibbs free energy (Δ G °) showed that the spontaneous nature of the adsorption process was feasible at different temperatures. Moreover, it successfully removed Pb(II) ions from selected samples of commercially available drinks. Therefore, this adsorbent exhibits significant potential for removing Pb(II) ions from liquid food products, thereby reducing daily dietary exposure to Pb(II).
研究领域:
材料科学
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环境科学
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食品科学
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DOI
PubMed
高影响因子
ACS Applied Bio Materials
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2024
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IF 4.6
ShiJie Yu,XiaoDong Xu,Liang Ma,Fei Zhao,JinLei Mao,Jing Zhang,ZhiFei Wang
The increasing complexity and difficulty of surgical procedures have led to a rise in medical errors within clinical settings in recent years. Gastrointestinal diseases, in particular, present significant medical challenges and impose substantial economic burdens, underscoring the urgent need for experiential, high-fidelity gastrointestinal surgical training tools. This study leverages patient-specific computed tomography (CT) and magnetic resonance imaging (MRI) data, combined with 3D printed manufacturing, to develop hydrogel organ models with tunable performance and tissue-mimicking softness. These properties are achieved by regulating the freeze–thaw cycles, cross-linking agents, and the concentration of incorporated antibacterial nanoparticles in DN hydrogels. Through the application of indirect 3D printing and the “sacrificial material method”, we successfully fabricate organ tissues such as the stomach, intestines, and blood vessels with high precision. In ex vivo surgical training demonstrations, these tissue-like soft hydrogels provide an effective platform for preoperative simulation and surgical training in digestive surgery, accommodating various surgical procedures and accurately simulating intraoperative bleeding. The development of advanced bionic organ models with specific and tunable characteristics based on DN hydrogels is poised to significantly advance surgical training, medical device testing, and the reform of medical education.
研究领域:
生物医学工程
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外科医学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Shirong Li,Langming Bai,Xinsheng Luo,Junwen Ding,Guibai Li,Heng Liang
Thin film composite (TFC) nanofiltration (NF) membranes supported by polymeric membranes have suffered from limited mechanical properties and chemical cleaning stability, resulting in an increasing operation cost. Strengthening the support of TFC membranes is expected to provide great stability for membranes. This work provided a TFC membrane constructed on the poly (vinyl alcohol) (PVA) incorporated carbon nanotube film, which was named CNT/PVA-TFC. Characteristics of substrates, including morphology, pore size, and mechanical properties, were investigated by scanning electron microscopy (SEM), intrusion mercury porosimetry and tensile method. The results demonstrated that PVA can improve the mechanical properties and hydrophilicity of the CNT film. The morphology, physicochemical properties and separation performance of CNT/PVA-TFC were also investigated. CNT/PVA-TFC showed great enhancement of mechanical properties with its elastic modulus and hardness approximately 330% and 200% of the control, respectively. Furthermore, CNT/PVA-TFC achieved greater resistance to caustic cleaning than TFC membranes supported by polymeric membranes. In addition, CNT/PVA-TFC exhibited an excellent flux decline of 29.3% and a flux recovery of 97.0%. The mechanism of the support of CNT and enhancement of PVA was systematically studied. This work highlighted the feasibility of fabricating TFC membranes on the CNT/PVA film, providing a new insight to alternate the polymeric substrate of TFC membranes.
研究领域:
材料科学
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环境工程
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膜技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoyin Cao,Jia Zhang,Jiaxuan Zhou,Rui Jiao,Min Zhang,Hanxue Sun,Jiyan Li,Weidong Liang,An Li
The development and preparation of multifunctional photothermal conversion materials has far-reaching significance for the utilization of solar energy resources in response to the energy crisis. Herein, we propose a Janus membrane for interfacial solar evaporation and phase change energy storage. The membranes were fabricated via combining the PVA film with multi-shelled hollow spheres (MHS). The membranes have asymmetric wettability, that is, one side is hydrophilic and the other side is hydrophobic. The as-resulted membranes obtain outstanding light absorption without further processing. According to these two advantages, the membranes were applied to solar evaporation. The evaporation rate of the membrane is 1.41 kg*m −2 h −1 and the evaporation efficiency is 92.4 % under 1sun irradiation. Moreover, the membrane prepared by impregnating 1-Hexadecanamine (HDA) into MHS possesses excellent tensile strength (2.21 MPa) and photothermal conversion ability. The light-to-thermal conversion efficiency can reach 81.9 % under 1sun irradiation. Therefore, the membranes have broad application prospects in the field of photothermal conversion.
研究领域:
材料科学
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太阳能
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能量存储
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纳米技术
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Longxiang Qian,Hao Xu,Yiwei Lu,Zezhong Chen
In response to the adverse events caused by the detachment of coatings during coronary guidewire interventions, this research investigates and optimizes the preparation process of a polyvinyl alcohol (PVA)/polyvinylpyrrolidone (PVP) coating with high adhesion and hydrophilicity. Using thermoplastic polyurethane (TPU) as the substrate, the coating was prepared via polydopamine (PDA) deposition and UV curing technology. The amounts of PVA, PVP, and polyethylene glycol diacrylate (PEGDA), as well as the proportion of the photoinitiator, were optimized through orthogonal experiments, significantly enhancing the hydrophilicity and adhesion of the coating. The optimized hydrophilic coating achieves a minimum water contact angle of 7.4°. The coating with the optimized formulation has a water contact angle of 12.2°, reaches grade 0 adhesion in the cross-cut test, and maintains a stable friction coefficient of 0.16. After water exposure, the water contact angle was 22.6°, and the friction coefficient remained below 0.2. Cytotoxicity tests showed cell viability between 90 % and 110 %, and the hemolysis rate was less than 5 %. These results indicate that the coating exhibits excellent hydrophilicity, adhesion, water resistance, and stability, offering significant potential to improve the safety and operability of coronary interventional guidewires, reduce coating-related adverse events, and enhance surgical quality and safety.
研究领域:
生物医学工程
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材料科学
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表面工程
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医疗设备
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Mengying Luo,Mufang Li,Ying Lu,Ming Xia,Qinghua Zhao,Dong Wang
With the increasing demand of health monitoring and protection, Point-of-Care Testing has developed rapidly due to its convenience and high efficiency. Here, a visual colorimetric nanofiber-based strip with a hierarchically porous structure was prepared for highly sensitive detection of glucose. To facilitate the subsequent testing, the composites with a hybrid nanoflower structure containing glucose oxidase (GOx), horseradish peroxidase (HRP), 3,3′5,5′-tetramethylbenzidine (TMB) and Mn 3 (PO 4 ) 2 were immobilized on a hierarchically porous PVA- co -PE nanofibrous strip. The obtained strip was used to detect glucose, a strong linear correlation (R 2 = 0.996) was found between the color difference and ln(C glucose ) in the range of 0.25–10 mM glucose. The detection limit is 0.14 mM and a discernible color change could be detected with the naked eye at low glucose concentration, indicating that the strip is highly sensitive to glucose. Additionally, a series of interferences substances including NaCl , KCl and urea were also investigated, and the results showed excellent specificity to glucose. Moreover, the strip exhibits good stability in the pH range of 5–7 and maintains excellent glucose detection performance after 60 days. It demonstrates that this strip is a promising candidate for personal diabetes detection.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2024
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IF 4.1
Luo Fang-Hua,Dong Zhi-Tao,Chen Guo-Hua,Ma Chen,Wang Huai-Yuan
Janus films with asymmetric physical/chemical properties have attracted considerable attention due to their promising applications in personal thermal management, electronic skins, sensors, actuators, etc. However, traditional methods for fabricating Janus films conventionally need the assistance of an interface or auxiliary equipment, which are usually complex and time-consuming. Herein, flexible poly(vinyl alcohol) (PVA)/graphene oxide (GO)/h-BN (recorded as PVA/GO/h-BN) Janus films with thermally, optically, and electrically anisotropic properties are fabricated by a simple density deposition self-assembly method, which just utilizes the density difference between GO and h-BN during water evaporation. Experimental results show that the two sides of the acquired Janus films have obvious asymmetric characteristics. In the original state of the PVA/GO/h-BN Janus films, the thermal conductivity of the GO side (10.06 W·m −1 ·K −1 ) is generally lower than that of the h-BN side (10.48 W·m −1 ·K −1 ). But after GO is reduced, the thermal conductivity of the rGO side reaches 12.17 W·m −1 ·K −1 , surpassing that of the h-BN side. In addition, the relative reflectance of the h-BN side of Janus film is also significantly higher than that of the rGO side, and the surface resistance difference between the two sides is about 4 orders of magnitude. The prepared PVA/GO/h-BN Janus films show great application potential in human thermal management, light conversion switches, and electronic skins. This study provides a simple and versatile strategy for fabricating Janus films with multifunctional (such as thermal, optical, and electrical) anisotropies.
研究领域:
材料科学
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纳米技术
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热管理材料
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Shengping Dai,Jingping Yao,Yixin Zhang,jinhua Cai,Jiaxin Zou,Huixian Ye,Yan Sui,Jingning Ding,Guanggui Cheng
Research on conductive elastomer with low hysteresis holds significant scientific importance for accelerating technological development of stable sensing electronic skin. Traditional polyvinyl alcohol (PVA) hydrogel is weak in mechanical properties and has serious hysteresis, which hampers its applications as tensile consecutive cycle sensors. Here, a covalent cross-linking network of PVA hydrogel was constructed through a condensation reaction by PVA and dimethylol dihydroxy ethylene urea (2d resin). On the other hand, a dynamic cross-linking network of PVA hydrogel was formed by the two-step reaction of borax with PVA, which acts as a sacrificial bond to dissipate energy during the loading-unloading process. In brief, the introduction of dual chemical cross-linking structure can adjust the mechanical properties of hydrogels (PVA/2d DN) in the range of 623–954 % and 35–86 kPa, with low hysteresis (residual strains of 4.13 % at 0–500 %), and fatigue resistance. The PVA/2d DN hydrogel was used as resistance strain sensor, capacitive pressure sensor, and triboelectric self-power sensor, which showed low detection limit, high sensitivity, and cycle stability. It has a wide application in human motion monitoring and metal recognition, etc. This work provided a versatile and effective way to design PVA hydrogel with high tensile strength and low hysteresis.
研究领域:
材料科学
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高分子化学
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传感技术
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电子皮肤
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力学性能
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
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IF 10.5
Junyu Lu,Xiaochuang Di,Mushan Yuan,Binbin Sun,Cuiqing Zhou,Yinfu Luo,Yang Chen,Huawei Zou
Achieving broad effective absorption bandwidth (EAB) with minimal weight gain in aramid honeycomb (HC) remains a significant challenge. This study successfully prepared crosslinked PVA/RGO foam in situ-filled aramid HC composites using freeze-drying and low-temperature chemical reduction processes. By adjusting the GO content, partial to complete encapsulation of the PVA framework by RGO sheets could be achieved, and all samples exhibited a dense framework network structure as seen in the SEM. The [email protected] /0.4Vc foam filled HC achieves a broadband EAB of 12.74 GHz at a thickness of 30 mm. Such foam samples can also achieve effective absorption at 1.19–2 GHz. The foam filled honeycomb further increases the compressive strength to 5.24 MPa compared with pure HC. Obvious overlap between the CST electric field distribution demonstrates that the conductive loss and λ/4 interference cancels are the main pathways of MA. Overall, the PVA/RGO foam-filled HC composites exhibit ultra-broadband microwave absorption performance with enhanced structural compressive strength , which has significant feasibility and application value in aerospace stealth structures.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
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2025
·
IF 5.3
Songqi Wang,Bairu Shi,Yang Shi,Wei-Guang Yang,Shuai Zhou,Tinglei Liu,Dongzhi Yang
Although polyacrylamide-based hydrogel exhibits excellent swelling and migration properties, it is more desirable for hydrogels with high compressive strength, flexible deformation, and rapid degradability for petroleum extraction. Herein, the core–shell structure PAM@PVA composite hydrogel achieves enhanced plugging strength through the Hofmeister effect of the PVA core and rapid degradability through the self-degrading ester bond of the flexible PAM shell, resulting in macroscopic and microscale hydrogels for oilfield fracturing and deep profile control. After the PVA network forms intramolecular hydrogen bonds by freeze–thaw and soaking in Na2SO4 brine, the PAM@PVA hydrogels reach a compressive strength of 5.62 MPa at 60% strain, which is three times that of PAM hydrogels. In the simulated fracturing plugging pressure resistance test, the macroscopic PAM@PVA hydrogels with the soft shell and hard core achieve a plugging strength of 2.48 MPa, effectively preventing migration during the plugging perforation process. At the high temperature (90 °C), the composite hydrogels completely degrade into polymer solution within 72 h due to the ester-bond hydrolysis of PAM and hydrogen-bond disruption of PVA. At the same time, the released linear polymers enhance oil recovery by 3%, resulting in up to 57% oil recovery. The high plugging strength, flexible deformation, and controllable self-degradation of PAM@PVA hydrogel offer a novel approach to improving oil recovery processes in petroleum engineering.
研究领域:
石油工程
·
高分子科学
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材料科学
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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）