MATERIALS LETTERS
·
2022
·
IF 3.574
Liping Liu,Ting Li,Maolei Sun,Wenyuan Jia,Kun Jiao,Shaoru Wang,Yun Liu,Kongzhao Jiang,Yuheng Yang,Zhihui Dai,Changli Xia,Zhiqiang Cheng,Guomin Liu,Yungang Luo
Temperature-controlled shrinkage polytrimethylene carbonate (PTMC)/polyvinylpyrrolidone (PVP) core–shell nanofibrous membranes were successfully prepared by uniaxial electrospinning to accelerate wound closure. The characterization and temperature-controlled shrinkage of the PTMC/PVP nanofibrous membranes were investigated. The results showed that the PTMC/PVP core–shell nanofibers had a periodic distribution of porous spindle-knotted structure, and EDS elemental mapping of N elements indicated the core–shell structure with PTMC shell and PVP core. The PTMC/PVP (1:3) nanofibrous membrane had the maximum shrinkage in PBS for 120 min, which area percentage were decreased to 68.0% at 20 °C and 49.4% at 37 °C. The results indicated that the PTMC/PVP nanofibrous membranes shrinkage would be increased with the temperature increased. Further experiments confirmed the PTMC/PVP (1:3) nanofibrous membrane could reduce the wound area of rat skin to approximately 70% in 30 min.
研究领域:
生物材料学
·
医学工程
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xueshuai Wang,Chengxian Cao,Sha Li,Liuchun Zheng
Poly(ethylene terephthalate- co -1,4-cyclohexanedimethylene terephthalate) (PETG) is a versatile engineering plastic with excellent properties and has been widely used in heat-shrinkable films, sheets, and packaging. A series of PETG with various contents of 1,4-cyclohexanedimethylene (CHDM) content was synthesized by transesterification and polycondensation. The PETG synthesized in this work has less DEG by-product content and exhibits excellent combined properties. This is attributed to the fact that the transesterification process leads to the formation of methoxy terminal groups (–OCH 3 ) in PETG, which exhibit higher stability compared to hydroxyl terminal groups (–OH). In addition, the properties of PETG can be controlled at the macromolecular structure level by simply regulating the content of CHDM. The chemical structure, thermal properties, mechanical performance, rheological properties, and heat shrinkage performance of PETG were systematically studied. The results demonstrated that CHDM content significantly influenced crystallization behavior, glass transition temperature ( T g ), thermal stability, and rheological properties. This work offers a theoretical foundation for advancing high-performance PETG and proposes novel synthesis strategies for applications. The results of this research support the promotion of the wide application of PETG materials in the packaging, medical, electronics, and automotive industries, especially in environmental protection and sustainable development, providing new development directions and solutions for the industry.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Bo Liang,Siqi Tang,Qingbai Jiang,Chuangsheng Chen,Xu Chen,Shengliang Li,Xuehui Yan
This paper presents the preparation and characterization of a series of PEO-PMMA composites containing different lithium salts (LiClO 4 or LiTFSI) with or without nano-Al 2 O 3 . Nano-Al 2 O 3 is added to the polymer electrolytes to alter the morphology, ionic conductivity , interfacial and thermal shrinkage properties. Nano-Al 2 O 3 can effectively improve the stability of the polymer electrolyte membrane interface. The tensile strength of the PEO-PMMA-LiTFSI-Al 2 O 3 electrolyte membrane is 3.24 MPa at room temperature . The study shows that the ion conductivities at room temperature for PEO-PMMA-LiTFSI (EO/Li + = 10) and PEO-PMMA-LiTFSI-Al 2 O 3 (EO/Li + = 10) are 6.71 × 10 −7 S/cm and 9.39 × 10 −7 S/cm, respectively. A good dimensional stability was observed for PEO-PMMA-LiTFSI with a thermal shrinkage of 8.7%. The electrochemical windows of PEO-PMMA-LiTFSI and PEO-PMMA-LiTFSI-Al 2 O 3 are all stable up to 4.6 V versus Li + /Li, which makes them good electrolyte candidates of lithium ion batteries with high-potential cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Recent Patents on Nanotechnology
·
2020
·Vol. 14
·期 1
·14-20
·
IF 0.977
Tian Dan,Yu Dan-Ni,Xu Yi-Ming,Ding Xu-Yin,Zhang Zhou-Yu,Wan Chun-Lan,He Ji-Huan
Background: Though there are many patents on silk, patents on sea silk are rare. Sea silk is one of the most coveted materials in the world, and the technology to make sea silk is at an extremely high risk of extinction. Unlike spider dragline silk and silkworm silk, this natural silk
has been forgotten in the academic commune for millennia, though it has many fascinating properties: high strength, remarkable adhesion, extreme lightweight, and others. Methods: Here we report that mussel-derived silk fibers can be fabricated by electrospinning. Instead of extracting
proteins from byssus, we directly use the protein solution from alive blue mussels, which are intensely commercially used. The protein solution and the polyvinyl alcohol solution are mixed together to produce mussel-based silk fibers. Results: The mussel-based silk fibers have many special
properties like high mechanical strength, remarkable super-contraction and good wetting properties. Conclusion: The electrospinning mussel-based silk fibers have the potential for use as a replacement for the rarest sea silk and as a new bio-inspired material with multi-functions.
研究领域:
材料科学
·
生物工程
✓ 已验证
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2021
·Vol. 79
·期 6
·4323-4337
·
IF 2.87
Cao Mengjing,Cai Qiang,Guo Guangfan,Guo Hong,Chen Yingchao,Zhang Yuping
Polymer microsphere profile control is a promising approach for the profile control of heterogeneous reservoirs. Matching between polymer microspheres after swelling in water and the reservoir pore throat is crucial for profile control. Hydration equilibrium time and swelling ratio are key properties that are a direct result of water shutoff efficacy. In this paper, a hollow structure microsphere with swelling–deswelling properties is synthesized and its physical properties including morphology, particle size distribution, water swelling property and deswelling property are thoroughly examined. Meanwhile, the displacement performances are studied. The results demonstrate that the hollow structure microspheres have good swelling–deswelling properties at different salt concentrations. Compared with two kinds of polymer microspheres with the same material, the hydration equilibrium time of hollow structure microspheres is longer than that of nonhollow polymer microspheres. Moreover, the hollow structure microspheres have an effect on deep plugging. With the hydration time increasing, the tertiary recovery of the hollow structure microspheres solution is higher than that of nonhollow polymer microspheres solution, whether in a homogeneous medium or in a heterogeneous medium.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Kunming Li,Xuepeng Ni,Dong Li,Jiaoli Hu,Huifang Chen,Yonggen Lu,Anqi Ju
Designing xerogels at the molecular level to overcome volume shrinkage is a promising strategy for carbon xerogels with desirable structure and performance. Here, we design a xerogel with non-shrinkage by introducing ZnCl 2 into resorcinol-melamine-formaldehyde polymerization. The gel network consisting of micrometer pores and large particles (0.26–1.35 μm) is constructed by the coordination of Zn 2+ with oxygen/nitrogen-containing groups, which is attributed to the structural support of the rigid triazine skeleton with large steric hindrance. Therefore, the reinforced gel network possesses enough strength to withstand capillary forces during atmospheric drying, and special drying and solvent exchange are avoided. The xerogels show non-shrinkage and a short preparation time of 24 h. The resulted activated carbon xerogels with interconnected hierarchically micro‑meso-macropores exhibit an optimal specific surface area of 1520 m 2 /g (through xerogels pyrolysis and the pore-forming of ZnCl 2 ), high adsorption (methylene blue, I – , Cu 2+ , etc.), and repeated adsorption ability. This work provides novel thought for porous nanomaterials with non-shrinkage and desirable structures in adsorption and energy storage.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jingguo Liu,Hongyan Li,Haiming Li,Wenze Song,Shilei Xia,Dongqing Wei,Juanjuan Wang,Huan li
Ceramic aerogels prepared using the polymer-derived ceramics (PDCs) route were extensively applied in the thermal insulation field with lightweight and high-temperature resistance. However, ceramic aerogels were susceptible to weight loss and volume shrinkage at high temperatures, leading to the collapse of the aerogel structure and a reduction in thermal insulation performance. In this paper, inspired by the skeletal structure of deep-sea glass sponges, hollow porous MHP-SiC-CA ceramic fiber aerogel was prepared by electrostatic spinning. The anti-shrinkage property of ceramic fiber aerogel was improved through the circular and spindle-shaped pores on the surface of hollow fibers. The gas-solid phase interface was increased by the abundant nanopore structure, leading to enhanced reflection and refraction of thermal radiation within the aerogel. The heat conduction and heat convection of the aerogel were reduced with the hollow and porous structure. The results presented that the ceramic fiber aerogel exhibited excellent anti-shrinkage properties, high specific strength , and ultra-low thermal conductivity . The material was expected to provide novel perspectives for the development of ceramic fiber aerogels applicable to ultra-high-temperature environments.
研究领域:
材料科学
·
生物启发工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2019
·Vol. 12
·期 17
·2813
·
IF 2.972
Haijuan Li,Ling Li,Shuaizhi Zheng,Xinming Wang,Zengsheng Ma
To improve the thermal shrinkage and ionic conductivity of the separator for lithium-ion batteries, adding carboxylic titanium dioxide nanofiber materials into the matrix is proposed as an effective strategy. In this regard, a poly(vinylidene fluoride-hexafluoro propylene)/dibutyl phthalate/carboxylic titanium dioxide (PVDF-HFP/DBP/C-TiO2) composite separator is prepared with the phase inversion method. When the content of TiO2nanofibers reaches 5%, the electrochemical performance of the battery and ion conductivity of the separator are optimal. The PVDF-HFP/DBP/C-TiO2(5%) composite separator shows about 55.5% of porosity and 277.9% of electrolyte uptake. The PVDF-HFP/DBP/C-TiO2(5%) composite separator has a superior ionic conductivity of 1.26 × 10−3S cm−1and lower interface impedance at room temperature, which brings about better cycle and rate performance. In addition, the cell assembled with a PVDF-HFP/DBP/C-TiO2separator can be charged or discharged normally and has an outstanding discharge capacity of about 150 mAh g−1at 110 °C. The battery assembled with the PVDF-HFP/DBP/C-TiO2composite separator exhibits excellent electrochemical performance under high and room temperature environments.Keywords:TiO2nanofiber;PVDF-HFP;composite separator;phase inversion;thermal shrinkage;ionic conductivity
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Yun Zhang,Runhe He,Yongbing Li,Hao Liu,Haihui Liu,Xing-Xiang Zhang
A novel core–shell nanocomposite fiber membrane was fabricated in this work by coaxial electrospinning using poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) as shell material and polyetherimide (PEI) as core material. The PEI core has good heat resistance and mechanical strength, serving as a stable skeleton support. At the same time, the gel shell is conducive to enhancing the electrolyte affinity, thereby promoting the rapid transmission of Li + . As a result, the Li/LiCoO 2 batteries with the fabricated separator present an excellent first discharge capacity of 178.8 mAh g −1 at 0.2C and capacity retention rate of 89.7 % after 200 cycles. Even running at high temperature (65 °C), the PEI@PVDF-HFP separator still enables a steady charging/discharging performance. Therefore, the PEI@PVDF-HFP nanocomposite separator can be an extraordinary candidate for high-safety lithium-ion batteries.
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
BIOMEDICINE & PHARMACOTHERAPY
·
2021
·
IF 6.53
Pengmei Guo,Yu Liu,Xiaojia Xu,Guijin Ma,Xiaomin Hou,Yanying Fan,Mingsheng Zhang
Background Severe acidosis deteriorates cardiac injury. Rat coronary arteries (RCAs) are unusually hypercontractive to extracellular (o) acidosis (EA). TMEM16A-encoded anoctamin 1 (ANO1), a Ca 2+ -activated chloride channel (CaCC), plays an important role in regulating coronary arterial tension. Purpose We tested the possibility that the activation of CaCCs in the arterial smooth muscle cell (ASMC) contributes to EA-induced RCA constriction. Methods ANO1 expression was detected with immunofluorescence staining and Western blot. TMEM16A mRNA was assessed with quantitative Real-Time PCR. Cl - currents and membrane potentials were quantified with a patch clamp. The vascular tension was recorded with a myograph. Intracellular (i) level of Cl - and Ca 2+ was measured with fluorescent molecular probes. Results ANO1 was expressed in all tested arterial myocytes, but was much more abundant in RCA ASMCs as compared with ASMCs isolated from rat cerebral basilar, intrarenal and mesenteric arteries. EA reduced [Cl - ] i levels, augmented CaCC currents exclusively in RCA ASMCs and depolarized RCA ASMCs to a greater extent. Cl - deprivation, which depleted [Cl - ] i by incubating the arteries or their ASMCs in Cl - -free bath solution, decreased EA-induced [Cl - ] i reduction, diminished EA-induced CaCC augmentation and time-dependently depressed EA-induced RCA constriction. Inhibitor studies showed that these EA-induced effects including RCA constriction, CaCC current augmentation, [Cl - ] i reduction and/or [Ca 2+ ] i elevation were depressed by various Cl - channel blockers, [Ca 2+ ] i release inhibitors and L -type voltage-gated Ca 2+ channel inhibitor nifedipine. ANO1 antibody attenuated all observed changes induced by EA in RCA ASMCs. Conclusion The greater activity of RCA ASMC CaCCs complicated with an enhanced Ca 2+ mobilization from both [Ca 2+ ] i release and [Ca 2+ ] o influx plays a pivotal role in the distinctive hypercontractility of RCAs to acidosis. Translation of these findings to human beings may lead to a new conception in our understanding and treating cardiac complications in severe acidosis.
研究领域:
心血管生理学
·
分子生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Yingjun Yang,Kuankuan Han,Siyuan Huang,Kai Wang,Yuchen Wang,Shukai Ding,Le Zhang,Miao Zhang,Bingshe Xu,Shufang Ma,Yongtao Wang,Shengli Wu,Xinlong Wang
Over the past decades, the critical role of cellular contractility associated mechanotransduction in the regulation of cell functions has been revealed. In this case, numerous biomaterials have been chemically or structurally designed to manipulate cell behaviors through the regulation of cellular contractility. In particular, adhesive proteins including fibronectin, poly-l-lysine and collagen type I have been widely applied in various biomaterials to improve cell adhesion. Therefore, clarifying the effects of adhesive proteins on cellular contractility has been valuable for the development of biomaterials design. In this study, a reference-free traction force microscopy with a well-organized microdots array was designed and prepared to investigate the relationship between adhesive proteins, cellular contractility, and mechanotransduction. The results showed that fibronectin and collagen type I were able to promote the assembly of focal adhesions and further enhance cellular contraction and YAP activity. In contrast, although the poly-l-lysine supported cell spreading and elongation, it was inefficient in inducting cell contractility and activating YAP. Additionally, compared with cellular morphogenesis, cellular contraction was essential for YAP activation.
研究领域:
细胞生物学
·
生物物理学
·
生物材料科学
·
机械生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Regenerative Biomaterials
·
2023
·
IF 6.7
Cao Yu,Wang Longfei,Zhang Xiumei,Lu Yi,Wei Yan,Liang Ziwei,Hu Yinchun,Huang Di
Rapid post-wound closure is necessary to avoid wound infection and promote scar-free healing when skin trauma occurs. In this study, new types of hydrogel dressings with adjustable contractility were fabricated based on N-isopropyl acrylamide/sodium alginate/graphene oxide (P/SA/GO). Then, the chitosan (CS) solution was used as a bridging polymer to achieve tissue adhesion to the hydrogel. The results show that the hydrogel based on poly(N-isopropyl acrylamide) (PNIPAM) not only has the ability to self-shrink but also can adjust the rate of shrinkage through near-infrared thermal stimulation. At the same time, high adhesion strength (7.86 ± 1.22 kPa) between the tissue and the dressing is achieved through the introduction of bridging polymers (CS), and the coating area of the bridging polymer can be adjusted to achieve regional adhesion. The mouse total skin defects experiments have shown that sutures-free wound closure in the early stages of wound healing could be obtained by adjusting the material temperature. Besides, the dressings can promote scar-free wound healing by reducing inflammatory cell infiltration and collagen deposition. These results indicate that double-crosslinked PNIPAM-based hydrogel dressings with adjustable adhesion and contractility proposed in this study provide a candidate material for achieving trackless wound healing.
研究领域:
材料科学
·
生物医学工程
·
伤口愈合
✓ 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）