JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 31
·15275-15287
·
IF 3.553
Liu Wenlong,Zhang Hua,Zhang Wen,Wang Mei,Li Jiahui,Zhang Yun,Li Hongyang
Abstract Metal–organic frameworks (MOFs) materials have unique advantages such as high surface area and favorable structures in the drug delivery system. However, MOFs have the characteristics of easy aggregation and poor dispersion, which make the drug delivery not to reach the ideal effect. Developing biodegradable carrier for controlled drug delivery is still a challenging task. In this work, the zeolitic imidazolate framework-8/polylactic acid (ZIF-8/PLA) composite membranes were prepared by secondary growth method on the surface of electrospun nanofiber membrane. As the incubation time prolonged and the 2-methylimidazole (2-MIM) concentration increased, the size of ZIF-8 particles increased and the distribution of ZIF-8 became more uniform, resulting in increased the hydrophilicity and surface roughness. Furthermore, PLA/ZIF-8 nanofiber membranes had excellent pH response and drug release capacity. While only up to 40% of loaded drug was released in the buffer of pH value of 7.4, over 90% of drug was released at pH 5.5 due to the dissolution of ZIF-8 skeleton at acidic solution. It indicates that the pH-responsive PLA/ZIF-8 nanofiber membrane can be used as highly efficient drug carriers. Graphic abstract
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
NANO
·
2020
·
IF 1.566
Aowen Li,Meimei Zhou,Pingping Luo,Jiaxin Shang,Pengbo Wang,Luxue Lyu
Nanofiber mats produced by electrospinning, with the advantages of specific surface area, porosity and chemical tenability, are an ideal support material for deposition of metal − organic framework (MOF) crystals. In this study, four types of MOFs (MIL-53(Al), ZIF-8, UiO-66-NH 2 and NH 2 -MIL-125(Ti)) were deposited on polydopamine (PDA)-modified electrospun polyvinyl alcohol (PVA)/SiO 2 organic − inorganic hybrid nanofiber mats by bulky synthesis. Because of the formation of Si–O–C–O–Si bridges between PVA chains and silica network, electrospun PVA/SiO 2 organic − inorganic hybrid nanofiber mats are quite stable in water or organic solvents and at high temperature are suitable as supports for MOFs deposition. The PDA layer, which exhibits a powerful adhesive ability to attach foreign objects, can effectively improve growth of MOFs on the surface of PVA/SiO 2 nanofiber mats. The obtained MOF composites combining the unique properties of electrospun nanofibers mats and MOFs particles become flexible and tailorable, greatly expanding the application range of MOFs materials. The synthesized MOF composites were used to adsorb chloramphenicol (CAP) in water. It was found that the four MOF composites could remove CAP from water effectively and MIL-53(Al) composite had the highest adsorption capacity due to the higher specific surface area.
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
JOURNAL OF PLASTIC FILM & SHEETING
·
2019
·
IF 1.714
Rui Zhang,Tongqing Zhang,Youfeng Cai,Xuyang Zhu,Qiong Han,Yu Li,Yi Liu,Ailian Wang,Guihong Lan
In this work, composite nanofiber membranes were prepared by adding modified nano-sized Al2O3-particles to a polyvinylidene fluoride (PVDF) solution (17 wt %) through an electrospinning process. The Al2O3 content affected the spun membrane performance, such as hydrophilicity, bovine serum albumin (BSA) rejection rate and anti-fouling properties were examined in detail. UF (experiment with an ultrafiltration cup) experiment was used to measure how the membrane water flux changed. This test showed that the nanoparticle affect was remarkable, the pure water flux was 4635 L•m−2•h−1 in 2% Al2O3/PVDF membrane versus 3546 L•m−2•h−1 for the membrane without nanoparticles. Contact angle was used to determine the hydrophilicity change of membranes. The results demonstrate that the modified membrane hydrophilicity was enhanced dramatically the contact angle of composite membrane with 2% Al2O3 was 56.34° versus 85.64° for the pristine PVDF membrane. The roughness and surface structure were measured by atomic force microscope (AFM) and electron microscopy (SEM). There were clear fibers in SEM images and the membrane surface roughness was heightened by adding nanoparticles. The rejection rate was investigated by UV spectrophotometer and the porosity was measured using a dry-wet weight method. The spun membrane rejection rate was 95.4%. Thermo gravimetric Analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR) were used to study how nano-Al2O3 particles affected the membrane structure. More importantly, the Al2O3/PVDF spun membrane displayed an outstanding anti-fouling property. To sum up, this composite spun membrane shows a remarkable efficiency in the test and could be an ideal candidate for water treatment.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 9
·2906
·
IF 4.927
Shuying Han,Zhaohua Zhang,Jia Chen,Jie Li,Mi Zhou,Zejian He,Zhen He,Longfei Li
Tympanic membrane perforation (TMP), a common disease, often needs a scaffold as the patch to support surgery. Due to the environment of auditory meatus, the patch can be infected by bacteria that results in failure; therefore, the ideal scaffold may combine biomimetic and antibacterial features. In this work, gelatin was used as the electrospinning framework, genipin as the crosslinking agent, and levofloxacin as an antibacterial in order to prepare the scaffold for TMP. Different contents of levofloxacin have been added to gelatin/genipin. It was found that, with the addition of levofloxacin, the gelatin/genipin membranes exhibit improved hydrophilia and enhanced tensile strength. The antibacterial and cell-cultured experiments showed that the prepared antibacterial membranes had excellent antibacterial properties and good biocompatibility, respectively. In summary, levofloxacin is a good group for the gelatin/genipin scaffold because it improves the physical properties and antibacterial action. Compared with different amounts of levofloxacin, a gelatin/genipin membrane with 1% levofloxacin is more suitable for a TM.Keywords:gelatin;genipin;levofloxacin;nanofiber membrane;tympanic membrane
研究领域:
生物材料学
·
耳科学
·
组织工程学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 24
·12735-12745
·
IF 11.9
Nana Xu,Xiaoshan Zhang,Haiyan Liu,Hui Xu,Shuang Wu,Bing Wang,Yingde Wang
Oxide ceramic fibers with softness and toughness are key materials in emerging fields like wearable devices and membrane technologies. However, the brittle failure of oxide ceramic fibers after thermal cycling leads to the loss of membrane architectures, which limits their long-term applications at high temperature. Here, we report a scalable approach of sol–gel electrospinning to synthesize a flexible and tough pyrochlore La1.85Al0.15Zr2O7 (L5AZO) nanofiber membrane (NFM) involving self-assembled 3D networks. The interactions between the nanoscale constituents lead to the assembled networks with high nodal connectivity and strong crosslinking between nanofibers, which may promote an enhancement of macroscopic mechanical properties by orders of magnitude. Ultrasonic dispersion and an amorphous secondary phase drive the formation of numerous L5AZO nuclei and soft grain boundaries, thus effectively refining grains and inhibiting crystallite growth. Indeed, the L5AZO NFM achieves both a high specific tensile modulus of ∼11.4 MPa cm3 g−1 and fracture toughness of ∼1032 J m−2, as well as high-temperature resistance above 1100 °C, which are advantageous for diverse structural applications. Furthermore, the simple processing technique of the NFM allows it to be fabricated into various functional devices, such as aerogels, thermal camouflage, and filtration membranes at high temperature. The mechanistic insights and manufacturability provided by this flexible and tough oxide NFM may create further opportunities for materials design and technological innovation.
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
MOLECULES
·
2023
·Vol. 28
·期 6
·2647
·
IF 4.6
Peng Wang,Xu Han,Xianhong Zheng,Zongqian Wang,Changlong Li,Zhiqi Zhao
In order to improve the photocatalytic performance of g-C3N4, the g-C3N4/Ti3C2/Ag3PO4S-type heterojunction catalyst was prepared by electrostatic assembly method, and then the g-C3N4/Ti3C2/Ag3PO4/PAN composite nanofiber membrane was prepared by electrospinning technology. The morphology and chemical properties of the nanofiber membrane were characterized by SEM, FTIR, and XRD, and the photocatalytic degradation of tetracycline hydrochloride (TC) in water by the nanofiber membrane was investigated. The results showed that g-C3N4/Ti3C2/Ag3PO4could be successfully loaded on PAN and uniformly distributed on the surface of composite nanofiber membrane by electrospinning technology. Increasing the amount of loading and catalyst, lowering the pH value and TC concentration of the system were conducive to the oxidation and degradation of TC. The nano-fiber catalytic membrane had been recycled five times and found to have excellent photocatalytic stability and reusability. The study of catalytic mechanism showed that h+, •OH and •O2−were produced and participated in the oxidation degradation reaction of TC, and •O2−plays a major role in catalysis. Therefore, this work provides a new insight into the construction of high-performance and high-stability photocatalytic system by electrospinning technology.Keywords:photocatalytic;PAN nanofiber membrane;degradation;tetracycline;heterojunction
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2019
·
IF 6.035
Lei Jiao,Kangkang Yan,Jing Wang,Saisai Lin,Ge Li,Fei Bi,Lin Zhang
Membranes with hierarchical structure have higher water contact angle due to affording more air pockets in its nano-micro regions, and then have been known as more hydrophobic. However, the hydrophobicity could be vanished after air in pockets has been exhausted such as in the vacuum membrane distillation (VMD) process. Here, an intrinsically hydrophobic electrospun nanofiber membrane (ENM), whose hydrophobicity is entirely depended on these materials surface energy , was proposed to promote the wetting resistance without the aid of any hierarchical structure. The novel composite ENMs were fabricated using polyvinylidene fluoride (PVDF) as matrix material , and then covered it with polydimethylsiloxane (PDMS) of much lower surface energy via a facile dip-coating. Scanning electron microscope (SEM) images of nanofibers in composite ENMs showed almost no hierarchical structure was existed, while the hierarchical structure was supposed to lower water contact angle in theory. However, the composite ENMs exhibited a higher water-repellency as the surface energy of nanofibers became lower. Therefore, the composite ENMs cannot be wetted by condensed vapor throughout the MD process, and a thinner membrane exhibited an excellent durability in the continuous vacuum MD tests. The result indicated that for the ENMs material of intrinsic hydrophobicity, the low surface energy is the essential quality to exhibit the strong and durable wetting resistance in VMD process, what is difficult to achieve by conventionally hierarchical architecture constructing on membrane surface .
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Li Yu,Wang Dan,Xu Guanchen,Qiao Li,Li Yong,Gong Hongyu,Shi Lei,Li Dongwei,Gao Meng,Liu Guoran,Zhang Jingjing,Wei Wenhui,Zhang Xingshuang,Liang Xiu
Air and water pollution poses a serious threat to public health and the ecological environment worldwide. Particulate matter (PM) is the major air pollutant, and its primary sources are processes that require high temperatures, such as fossil fuel combustion and vehicle exhaust. PM0.3 can penetrate and seriously harm the bronchi of the lungs, but it is difficult to remove PM0.3 due to its small size. Therefore, PM0.3 air filters that are highly efficient and resistant to high temperatures must be developed. Polyimide (PI) is an excellent polymer with a high temperature resistance and a good mechanical property. Air filters made from PI nanofibers have a high PM removal efficiency and a low air flow resistance. Herein, zeolitic imidazolate framework-8 (ZIF-8) was used to modify PI nanofibers to fabricate air filters with a high specific surface area and filtration efficiency. Compared with traditional PI membranes, the ZIF-8/PI multifunction nanofiber membranes achieved super-high filtration efficiency for ultrafine particles (PM0.3, 100%), and the pressure drop was only 63 Pa. The filtration mechanism of performance improvement caused by the introduction of ZIF-8/PI nanofiber membrane is explored. Moreover, the ZIF-8/PI nanofiber membranes exhibited excellent thermal stability (300 C) and efficient water–oil separation ability (99.85%).
研究领域:
环境科学
·
材料科学
·
空气污染控制
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 19
·7594-7603
·
IF 8.067
Dehua Wang,Lixiang Chen,Longlong Jiang,Yang Yu,Ye Lu,Hebin Li,Yang Li,Zifei Meng,Qi Su,Yongcheng Zhang,Xiaoxiong Wang
Traditional functional materials are the mainstream of modern materials science research. Recently, flexible inorganic functional materials have emerged, opening a new area of materials science. Among the multiple flexible inorganic functional materials, flexible inorganic luminescent materials are the most typical ones due to the compatibility between their nanostructure and luminescence, and are the best choice for investigation for new applications in this field. The luminous intensity of flexible inorganic luminescence materials increases with the increase of calcination temperature, but the macroscopic flexibility decreases with the increase of calcination temperature, which leads to the urgent demand of having a flexible inorganic luminescence material with both good macroscopic flexibility and high luminescence. In this paper, the famous inorganic luminous material CaYAl3O7:Eu3+ was successfully prepared by electrospinning into a macroscopically flexible form. The macroscopic flexibility and luminescence of a pure inorganic CaYAl3O7:Eu3+ nanofiber membrane were systematically investigated. After calcining at high temperature, the grain size increases, which is beneficial to luminescence. However, reducing the calcination temperature will further optimize the flexibility of the membrane. At the same calcination temperature, the maximum bending strain of the inorganic CaYAl3O7:Eu3+ nanofiber membrane is about 2.4 times that of the inorganic CaTiO3:Pr3+ nanofiber membrane, and the macroscopic flexibility of the inorganic CaYAl3O7:Eu3+ nanofiber membrane is obviously better than that of the inorganic CaTiO3:Pr3+ nanofiber membrane. This study provides an idea for the preparation of high-temperature macroscopically flexible inorganic functional materials.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Zhenfeng Guo,Ze Zhu,Xiaoqian Zhang,Ying Peng,Ziting Huang,Xinqiang Wang,Luyi Zhu,Yongshuai Xie,Guanghui Zhang,Benxue Liu,Dong Xu
High-performance thermally insulating ceramic materials with excellent mechanical and thermal insulation properties are essential for thermal management in extreme environments. In this work, SiO 2 was introduced into the crystalline lattice and grain boundary of TiO 2 to inhibit its phase transition and grain growth. Meanwhile, layered TiO 2 /SiO 2 nanofiber membranes (TS NFMs) were designed and prepared. The TS NFMs had lightweight (44 mg/cm 3 ), high tensile strength (4.55 MPa), ultra-flexibility, and low thermal conductivity (31.5 mW·m −1 ·K −1 ). The prepared TS-1100 NFMs had excellent buckling fatigue resistance, which could undergo 100 buckling-recovery cycles at up to 80% strain. Low density and high diffuse reflectance endow the TS NFMs with excellent thermal insulation effects. A single-layer nanofiber membrane was composed of multiple layers of nanofibers. According to the principle of multi-level reflection, the multilayer structure had a better near-infrared reflection effect. Through the stacking effect of layers, a 10 mm thick sample composed of about 300 layers of nanofiber membranes could reduce the hot surface temperature from 1,200 °C to about 220 °C, demonstrating an excellent comprehensive thermal insulation effect. The layered TS NFMs with ultra-flexibility, high tensile strength and high-temperature resistance (1,100 °C) provide a dominant pathway in producing materials in extremely high-temperature environments.
研究领域:
材料科学
·
热管理工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Na Gao,Yifan Zhang,Ruizi Chen,Yue Zhao,Xiao-Peng Li,Heguo Li,Jiang Shao,Jiefeng Gao,Xinjian He,Bobo Shi,Xiaoyu Chen,Shenghui Zhang,Huan Xu
With the increasing demand for ecofriendly air filtration materials, poly(lactic acid) (PLA) nanofibrous membranes (NFMs) show significant potential for efficient air purification while evading plastic pollution. However, there is still an urgent need to solve the issues of intrinsically low electroactivity and poor electret performance for PLA. Here, we prepared MOF-functionalized core–shell beaded PLA (MCSB-PLA) gradient nanofibers at fibrous cellulose, featuring a PLA/MOF-5 composite shell layer by coaxial electrospinning. Under the action of high-voltage electric field, MOF-5 nanocrystals were ready to interact with PLA chains, prompting the generation of highly refined and electroactive nanofibers. The MCSB-PLA NFMs were characterized by ultrafine fibers (diameter decrease of 23.5 %) and MOF-triggered bead-on-string microstructures. Meanwhile, both the surface potential and dielectric constant were largely elevated for MCSB-PLA NFMs (up to 5.2 kV and 1.86, respectively), accompanied by excellent tribo-output performance (236.8 % and 161.9 % increase in output voltage and current, respectively). Given the increased electroactivity, MCSB-PLA NFMs showed high-efficiency PM 0.3 filtration (93.4 %, 106 Pa, at 32 L/min), representing an increase of 12.26 % compared to pure PLA counterpart (only 83.2 %). Even under high-humidity conditions, 91.3 % removal of PM 0.3 was realized by MCSB-PLA (at 90 %RH and 32 L/min). Furthermore, the self-powered mechanisms were integrated with MCSB-PLA/cellulose, permitting real-time monitoring of physiological signals. The proposed degradable and highly electroactive MCSB-PLA NFMs is highly promising for air purification and passive healthcare.
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Meng Zhang,Yinchuan Wang,Xueling Yin,Mei Xue,Xin Zhao,Runxiao Zheng,Jianfeng Qiu,Zhihong Zhu
Developing safe and effective novel wound dressings to enhance full-thickness skin wound regeneration is highly desirable. In this study, we firstly incorporated chlorogenic acid (CA) into dopamine (DA) functionalized alginate (Alg-DA) conjugates and utilized polyvinyl alcohol (PVA) as the carrier polymer to fabricate a series of novel multifunctional composite nanofiber membranes (PVA/Alg-DA/CA) for promoting wound healing. These nanofiber membranes exhibited high water absorption, water vapor transmission rate, porosity, and hydrophilicity properties. The CA endowed the PVA/Alg-DA/CA membranes with excellent antibacterial properties, and the superior antioxidant activity to effectively protect cells from oxidative damage. Meanwhile, capitalizing on the unique nanofiber architecture, as well as the inherent biofunctional activities of CA and Alg-DA, these membranes exhibited remarkable biocompatibility, fostering a conducive environment for fibroblast adhesion and proliferation. Moreover, wound healing assessments and histopathological analyses revealed that composite membranes could promote neovascularization and tissue remodeling, and thus accelerating wound closure in the mouse full-thickness wound defect model. Additionally, the upregulation of key healing markers including CD31 and TGF-β1 protein expressions, further corroborated the ability of multifunctional membrane to stimulate the wound healing cascade. This multifunctional membranes with biosafety and therapeutic outcomes are a promising candidate for wound dressing to promote skin repair.
研究领域:
生物材料学
·
医学
·
药剂学
✓ 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）