COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Fanjia Zeng,Xu Zhao,Mengying Luo,Wen Wang,Xing Qing,Ying Lu,Weibing Zhong,Qiongzhen Liu,Jie Luo,Mufang Li,Dong Wang
With the rapid development of thermoelectric (TE) generators, the TE device that is transparent, flexible, and can be used for a long time under high humidity and low/high temperature has aroused great interests. In this study, a new hydrophilic substrate of poly (vinyl alcohol-co-ethylene) (PVA-co-PE) nanofiber membrane was used to support the poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and then the PEDOT:PSS/PVA-co-PE composite was encapsulated by epoxy. Due to the size effect of nanofibers, the PVA-co-PE/epoxy composite area shows a good transmittance of 72% at a wavelength of 600 nm, while the area containing the PEDOT:PSS remains black. This kind of transparent packaging structure is more conducive to the application of TE device. Moreover, the special interpenetrating structure and hydrogen bonding between the three phases of PEDOT:PSS, PVA-co-PE NM and epoxy resin greatly enhance the interfacial adhesion of PEDOT:PSS/PVA-co-PE/epoxy composite. The morphology, mechanical properties , transmittance, TE performance, bending resistance and environmental stability of the transparent composite TE device were analyzed. The new composite structure proposed in this research gives the PEDOT:PSS/PVA-co-PE/epoxy TE device outstanding flexibility and environmental stability. The TE performance remains stable after 2000 cycles repeated bending and after placing one end of the TE device in hot steam and ice water. All the results demonstrate the potential application of the transparent composite TE device in the field of flexible electronic device packaging and applications.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Fashion and Textiles
·
2021
·Vol. 8
·期 1
·1-12
·
IF 2.2
Chen Yuanli,Fan Hui,Zha Xinlin,Wang Wenwen,Wu Yi,Xiong Yi,Yan Kun,Wang Yuedan,Wang Dong
High efficiency and anti-pollution oil/water separation membrane has been widely explored and researched. There are a large number of hydroxyl groups on the surface of silica, which has good wettability and can be used for oil-water separation membranes. Hydrophilic silica nanostructures with different morphologies were synthesized by changing templates and contents of trimethylbenzene (TMB). Here, silica nanospheres with radical pores, hollow silica nanospheres and worm-like silica nanotubes were separately sprayed on the PVA -co- PE nanofiber membrane (PM). The abundance of hydroxyl groups and porous structures on PM surfaces enabled the absorption of silica nanospheres through hydrogen bonds. Compared with different silica nanostructures, it was found that the silica/PM exhibited excellent super-hydrophilicity in air and underwater “oil-hating” properties. The PM was mass-produced in our lab through melt-extrusion-phase-separation technique. Therefore, the obtained membranes not only have excellent underwater superoleophobicity but also have a low-cost production. The prepared silica/PM composites were used to separate n-hexane/water, silicone oil/water and peanut oil water mixtures via filtration. As a result, they all exhibited efficient separation of oil/water mixture through gravity-driven filtration.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 48
·19216-19226
·
IF 7.367
Bing Xiong,Weibing Zhong,Qing Zhu,Ke Liu,Mufang Li,Gang Sun,Dong Wang
The development of electronics towards a more functions-integrated, flexible and stretchable direction requires mechanically flexible substrates with high thermal and dimensional stability and optical transparency. Herein, rolls of an optically transparent PVA-co-PE nanofibrous membrane/epoxy composite with synergistically enhanced thermal stability, very low CTE, and outstanding mechanical properties are reported. The nanoscale size, the unique inter-stack structure, and the strong interfacial interactions between the PVA-co-PE nanofibers and the epoxy contribute to the synergistic effects. Because of the match between the refractive index (RI) of the PVA-co-PE nanofibers and the epoxy matrix, the visible light transmittance of nanocomposite film could be as high as 85% and the composite film was still optically transparent with a nanofiber loading content of up to 61.7 wt%. The break strength and compliance matrix of the composite film with a high fiber loading of 61.7 wt% increased by 2.3 times of that of the neat epoxy film and exceeded 3000 m2 N−1, respectively. PVA-co-PE nanofibers have a very low CTE value (3.634 × 10−6 K−1) and could be applicable as a reinforcement to reduce the thermal expansion of epoxy. Furthermore, we developed a flexible alternating current electroluminescent (ACEL) device based on the transparent composite film and the experimental results showed that the transparent composite film could serve as substrate for flexible electronic devices. In addition, their electrical and optical properties were evaluated.
研究领域:
材料科学
·
柔性电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 43
·20922-20929
·
IF 2.562
Jingjing Huang,Dong Wang,Ying Lu,Mufang Li,Weilin Xu
Antifouling nanofibers with zwitterionic materials on surfaces that can prevent the nonspecific adhesion of biomolecules and microorganism are in demand for high efficiency biosensors and affinity membranes. The functionalization of zwitterionic sulfobetaine on surfaces of PVA-co-PE nanofiber membrane via click chemistry is performed employing two synthesis routes and reported in this paper. PVA-co-PE nanofiber membranes were activated with cyanuric chloride, and then surface functionalized with sodium azide or 2-propynylamine to prepare “clickable” nanofibers with azide or alkynyl groups, respectively. The zwitterionic sulfobetaine was finally “clicked” onto PVA-co-PE nanofiber membranes. The successful surface functionalizations of PVA-co-PE nanofiber membrane were confirmed with FTIR-ATR, Raman spectroscopy, XPS and EDS. The analysis of element composition using XPS indicated that alkynylation of activated PVA-co-PE nanofiber membranes can “click” more sulfobetaines on nanofiber surfaces than surface azidation. SEM results showed that functionalized PVA-co-PE nanofiber membranes maintained well-defined nanofibrous morphology. PVA-co-PE nanofiber membranes with zwitterionic sulfobetaine demonstrated excellent antifouling performance by effectively resisting bovine serum albumin (BSA) protein adsorption.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Dan Xue,Wen Wang,Longhai Piao,Mufang Li,Shuang Wang,Chenxue Xiang,Dong Wang
With the rapid development of electronic information technology, flexible transparent materials have been widely concerned and studied by researchers. Traditional transparent films have some problems in flexibility, transparency, or preparation method, which restrict their further development in scale production and application. Herein, we have developed a simple method by embedding the mass produced PVA- co -PE nanofibers into the PVP polymer matrix through photopolymerization method to produce a Polyvinyl Pyrrolidone/PVA- co -PE (PVP/NFs) composite film with high flexibility and transparency. Due to the nanoscale size and small refractive index contrast between nanofiber and PVP, the PVP/NFs composite film showed high light transmittance of 85.87%. In addition, the filling of PVA- co -PE nanofibers had a synergistic enhancement effect on the mechanical properties and thermal stability of PVP/NFs composite film. The tensile stress was as high as 16.6 MPa with a nanofiber content of 37.67 wt%, which was 4.05 times higher than that of the pure PVA- co -PE nanofiber film, and 2.81 times higher than that of the pure PVP film. Furthermore, the excellent flexibility of the PVP/NFs composite film enabled it to withstand a large-scale bending deformation under the action of external forces. The high flexibility, optical transparency and fast preparation made the PVP/NFs composite film a great application prospect in the intelligent electronic equipment and smart buildings.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2016
·
IF 3.902
Wenwen Wang,Hao Zhang,Zhifeng Zhang,Mengying Luo,Yuedan Wang,Qiongzhen Liu,Yuanli Chen,Mufang Li,Dong Wang
In this study, poly(vinyl alcohol- co -ethylene) (PVA- co -PE) nanofibrous membrane was activated by sodium hydroxide and cyanuric chloride, and then the activated membranes were functionalized by 1,3-propanediamine, hexamethylenediamine and diethylenetriamine to be affinity membranes for bilirubin removal, respectively. The chemical structures and morphologies of membranes were investigated by SEM, FTIR and XPS. And the adsorption ability of different amine-functionalized nanofibrous membranes for bilirubin was characterized. Furthermore, the effects of temperature, initial concentration of bilirubin, NaCl concentration and BSA concentration on the adsorption capacity for bilirubin of diethylenetriamine-functionalized nanofibrous membrane were studied. Results indicated that the adsorption capacity for bilirubin of diethylenetriamine-functionalized nanofibrous membrane could reach 85 mg/g membrane when the initial bilirubin concentration was 200 mg/L while the adsorption capacity could be increased to 110 mg/g membrane if the initial bilirubin concentration was more than 400 mg/L. The dynamic adsorption of diethylenetriamine-functionalized nanofibrous membrane showed that the ligands of amine groups on the membrane surface could be used as far as possible by recirculating the plasma with certain flow rates. Therefore, the diethylenetriamine-functionalized PVA- co -PE nanofibrous membrane possessed high adsorption capacity for bilirubin and it can be candidate as affinity membrane for bilirubin removal.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2017
·
IF 3.531
Mengying Luo,Wenwen Wang,Qinghua Zhao,Mufang Li,Yuanli Chen,Zhentan Lu,Ke Liu,Dong Wang
Poly(ethylene- co -polyvinyl alcohol) (PVA- co -PE) nanofiber membrane with abundant active hydroxyl groups on the surface was modified through a solid-phase synthesis process. The PVA- co -PE nanofibers with different average diameters ranging from 200 to 500 nm were modified by cyanuric chloride and 1, 3-propanediamine. The aminated PVA- co -PE nanofiber membrane was subsequently biotinylated and then horseradish peroxidase (HRP) was successfully immobilized onto it. The morphologies, hydrophilicity and chemical structures of membranes surface were investigated by SEM, water contact angle, FTIR and XPS. The HRP-immobilized PVA- co -PE nanofiber membrane revealed high activity, efficiency, sensitivity and reusability when it was used to catalyze the luminol-H 2 O 2 reaction. The results demonstrated that the HRP-immobilized PVA- co -PE nanofiber membrane could be a promising candidate as solid support materials for catalysis of Luminol-H 2 O 2 . The relative light unit (RLU) could run up to 5 × 10 5 when the H 2 O 2 concentration was low to 1 × 10 −15 mol/L. The HRP-immobilized PVA- co -PE nanofiber membrane was the potential chemiluminescence biosensor which could be applied in biological, medical and food fields.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
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
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Mufang Li,Xu Zhao,Yingying Li,Wen Wang,Weibing Zhong,Mengying Luo,Ying Lu,Ke Liu,Qiongzhen Liu,Yuedan Wang,Dong Wang
The rapid development of optoelectronic devices puts forward higher requirements for flexible transparent films with good mechanical and thermal properties. To further improve the mechanical, thermal and optical properties of the PVA-co-PE nanofiber reinforced epoxy composite film, cellulose nanocrystals (CNCs) was selected as modifier to enhance the interfacial adhesion between the reinforced nanofibers and matrix. Benefiting from excellent hydrophily, high strength , transparency and ultra-low thermal expansion coefficient (CTE) of CNCs, dramatic improvements in tensile strength , transparency and thermal stability of CNCs/PVA-co-PE/epoxy composites were observed over pure PVA-co-PE nanofiber/epoxy film. Typically, when the CNCs concentration was 3%, the transparency of CNCs/PVA-co-PE/epoxy film increased from 83.4% to 90.4%, the tensile strength increased from 11.4 MPa to 16.4 MPa, the CTE dropped from 33 to 10 ppm/K. Furthermore, as the reinforcement for matrix and the carrier for functional materials , the CNCs/PVA-co-PE nanofiber membrane was used to prepare the patterned photochromic and thermochromic films encapsulated with epoxy, indicating the potential application of CNCs/PVA-co-PE/epoxy composites in the light emitting devices .
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Qing Zhu,Yao Wang,Mufang Li,Ke Liu,Chunyan Hu,Kelu Yan,Gang Sun,Dong Wang
The heavy metal ions are harmful for both environment and human healthy, therefore it is highly demanded to remove them from environment. In this study, the crystalline nanocellulose (CNC)/ poly(vinyl alcohol-co-ethylene (PVA- co -PE) nanofibrous membrane functionalized with 1, 2, 3, 4 -butanetetracarboxylic acid (BTCA) was prepared to adsorb the heavy metal ions. To enhance the absorptivity, BTCA modified membrane was activated by NaHCO 3 . The structures of modified nanofibrous membranes were characterized by FESEM and FTIR. The modified membrane was then used to adsorb the Pb (II), and the mixture of Pb (II), Cr (VI), Mn (II) and Cu (II). The effect of pH value and initial concentration on the absorptivity of nanofibrous membrane to Pb (II) was studied and the adsorption kinetics was analysed. After NaHCO 3 activation, the modified nanofibrous membrane demonstrated excellent adsorption capacity to the single metal ions and metal ions mixture. The equilibrium adsorption could reach 471.55 mg·g −1 at 15 °C, higher than other nanofibrous membranes reported. Moreover, the modified nanofibrous membrane was found to be stable and could maintain 50% of the initial data after three times reuse. All of the results indicated the NaHCO 3 activated membrane was a good candidate for the heavy metal ions removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2014
·
IF 2.822
Ying Lu,Zhihong Wu,Mufang Li,Qiongzhen Liu,Dong Wang
A novel hydrophilic poly(vinyl alcohol- co -ethylene) (PVA- co -PE) nanofiber membrane for heavy metal ions removal was fabricated by the solid phase synthesis of iminodiacetic acid (IDA) on nanofiber membrane surfaces. The hydrophilic PVA- co -PE nanofiber membranes were activated with cyanuric chloride . The IDA was then covalently linked to the activated PVA- co -PE nanofiber membranes. The chemical structures of activated and functionalized PVA- co -PE nanofiber membranes were confirmed with FTIR–ATR. The morphology of PVA- co -PE nanofiber membranes were characterized with SEM. The increase in the amount of IDA on functionalized PVA- co -PE nanofiber membranes significantly improved the adsorption amount of Cu 2+ . The IDA functionalized PVA- co -PE nanofiber membranes demonstrated excellent adsorption capability of Cu 2+ , Co 2+ , Zn 2+ and Ni 2+ . The adsorption of above heavy metal ions could be repeatedly regenerated by desorbing the ions adsorbed on nanofiber membranes. The novel IDA functionalized PVA- co -PE nanofiber membranes have great potential in the application of industry and drinking water treatment .
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
危险品化学品经营许可证（带存储）