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
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Heling Li,Jinchi Dai,Qi Xu,Cuifen Lu,Guichun Yang,Feiyi Wang,Junqi Nie,Xingjian Hu,Nianguo Dong,Jiawei Shi
A series of high-strength and hydrolytic degradable POSS-PEG hybrid hydrogels were successfully fabricated by Michael addition reaction of 4-arm-PEG-maleimide with thiol-terminated PEG-functionalized POSS cross-linkers in aqueous phase. The cross-linkers, which are hydrophilic, multifunctional and contain esters, were prepared by linking hydrophilic PEG with different chain length onto hydrophobic POSS and terminating with a thiol group. All the prepared hybrid hydrogels were achieved with a porous structure and high mechanical strength, and the G′ of POSS-PEG 500 hybrid hydrogel reached a maximum of 15,000 Pa, which is much higher than our previous POSS-PEG hybrid hydrogels prepared by monofunctional POSS. The swelling ratio and hydrolytic degradation rate of hybrid hydrogels increased with the increase of PEG chain length. In vitro cell culture showed that all the hybrid hydrogels had good biocompatibility. Thus, these hybrid hydrogels exhibited the potential for tissue engineering scaffolds.
研究领域:
材料科学
·
生物医学工程
·
组织工程
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产品关联
DOI
高影响因子
Soft Matter
·
2023
·Vol. 19
·期 21
·3925-3932
·
IF 3.4
Wenjuan Xia,Ling Wang,Yijia Yu,Wenjin Wang,Zhaoqiang Wu,Hong Chen
Stretchable ionic conductive elastomers have been extensively studied due to their great application potential in the fields of sensors, batteries, capacitors and flexible robots. However, it is still challenging to prepare multifunctional ionic conductive elastomers with high mechanical strength and excellent tensile properties by a green and efficient method. In this study, we prepared PDES–DMA ionic conductive elastomers by a “one step” rapid in situ polymerization of AA/ChCl-type polymerizable deep eutectic solvents (PDES) and N,N-dimethylacrylamide (DMA) under ultraviolet (UV) irradiation. In addition to the characteristics of high mechanical strength (tensile strength of 9.27 MPa) and excellent tensile properties (elongation at break of 1071%), the PDES–DMA elastomer also has high transparency (>80%), strong self-adhesion (adhesion strength with glass surface 133.8 kPa) and self-healing properties. In addition, sensors based on the ionic conductive elastomer can be used to detect human movements such as finger, wrist, elbow, ankle and knee bending. Considering the convenience of the preparation method and the excellent versatility of the prepared PDES–DMA ionic conductive elastomer, we believe that the method proposed in this study has potential application prospects in the field of flexible electronics.
研究领域:
材料科学
·
传感器技术
·
柔性电子学
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR BIOSCIENCE
·
2024
·
IF 4.4
Junxia Yin,Shan Wang,Lin Cui,Dongmei Li,Shengchao Yang,Jianning Wu,Guihua Meng,Xing Tian,Zhiyong Liu,Yanlong Tai,Jichang Liu
Hydrogel wound dressing can accelerate angiogenesis to achieve rapid wound healing, but traditional hydrogel dressings are difficult to meet the repair of joint sites due to their low mechanical strength. Therefore, we constructed the gel system by designing the chemical-physical interpenetrating network structure to achieve high strength and high toughness of the hydrogel. The high-strength double-network hydrogels were synthesized by simple free radical polymerization and low-temperature physicochemical cross-linking in our experiments. The suspension was obtained by green reduction of graphene oxide with carboxymethyl chitosan, followed by the introduction of acrylamide (AM) to form a covalent cross-linked network, which was immersed in ferric chloride solution to form metal ligand bonds, and finally the chemical-physical dual cross-linked network hydrogel wound dressing was prepared. Here, reduced graphene oxide can enhance electrical conductivity and excellent near-infrared photothermal effect to the hydrogel. The cell viability of this novel wound dressing was above 90.0%, its hemolysis rate was below 2.0%, and the electrical conductivity could reach (6.89 ± 0.07 (mS/cm)). In addition, the stress-strain curve demonstrated that the double cross-linked network hydrogel could reach a stress of more than 0.8 MPa at 82.0% strain, and the cyclic compression experiment shows that it can still recover its original shape after five times of repeated compression. This work can provide a reference for the exploitation of high mechanical strength hydrogel wound dressings with good electrical conductivity and near-infrared photothermal effect. This article is protected by copyright. All rights reserved
研究领域:
生物材料学
·
组织工程
·
再生医学
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Heng Zhang,Dongxu Yao,Ming Zhu,Yongfeng Xia,Jun Zhao,Yu-Ping Zeng
Porous Si 3 N 4 ceramics hold great promise for high-temperature wave-transparent materials, but it is a significant challenge to achieve both a low dielectric constant and high mechanical strength. This study explores a method combining in-situ pre-gel casting and non-directional freeze-drying to produce high-porosity, uniform microstructure Si 3 N 4 ceramics. By adjusting gel concentration and pre-gelation time, ice crystal growth effectively restricted, resulting in a uniform pore structure. The resulting porous Si 3 N 4 ceramics exhibited low drying shrinkage (1.50 %) and high porosity (59.13 %), with a flexural strength of 119.48 MPa, surpassing porous ones produced by other wet forming processes. At 30 GHz, the dielectric constant was 2.45, and the dielectric loss was 5.65 × 10 −3 .
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Hang Li,Yi Wu,Hongyi Tu,Min Chen,Shuxue Zhou,Limin Wu
Transparent superhydrophobic coatings hold significant potential for applications such as windows and reflectors. However, issues such as fragility and high haze have limited their practicality. Drawing inspiration from dragonfly structures, we developed a transparent superhydrophobic coating by etching the polystyrene microsphere array semiembedded on a silicon oxide matrix and subsequently depositing the methyltrichlorosilane-derived nanofilaments. The resulting coating features silicon oxide craters and nanofilaments inspired by dragonfly wings. Due to the coating’s small, multiscale nanostructures, it has a high average visible light transmittance of 90.4% and a low average haze of 4.0%, comparable to the substrate glass. It also exhibits exceptional superhydrophobic properties, with a contact angle of 161.5° and a sliding angle of 1.5°. Notably, the coating retains its superhydrophobicity even after withstanding impacts from 5 kg of water and 500 g of sand, thanks to its robust wing vein-inspired protected structure. Additionally, it shows strong resistance to acids, alkalis, and temperatures up to 400 °C. The coating maintains a high transmittance and low haze after 67 days of UV irradiation or 300 days of outdoor exposure. The combination of low haze and robustness in this transparent superhydrophobic coating highlights its promising potential for applications in related fields.
研究领域:
材料科学
·
仿生学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 22
·
IF 1.768
Yanzhao Zhu,Zhongkui Wu,Hanmin Lu,Zhi Yue
In this article, we report a facile strategy for preparing high-mechanical-strength ferrohydrogels containing magnetic nanoparticles homodispersed by a thermodynamically stable Pickering emulsion (PE). After the monomers were mixed with the PE, including methacryloxy propyl trimethoxyl silane emulsified by ferric oxide (Fe 2 O 3 ) nanoparticles as the dispersed phase, hydrogels were synthesized by free-radical polymerization. In contrast to conventional hydrogels crosslinked by a molecular crosslinker, in our new approach, the magnetic PE particles served as individual, multifunctional crosslinkers. Characterizations of the swelling behavior, the mechanical properties, and other properties indicated that our ferrohydrogels exhibited outstanding physical performances that were superior to those of traditional hydrogels and magnetic responsiveness. These ferrohydrogels may have applications in soft and controllable actuators. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41950.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Peisen Sang,Ren’ai Li,Kaili Zhang,Guangxue Chen,Kai Zhao,Minghui He
Liquid-free ionic conductive elastomers (ICEs) are used in flexible electronic components because they solve liquid leakage and evaporation problems. In everyday use, we often need high mechanical strength and rapid self-healing performance. Here, we report the development of liquid-free ICEs with high mechanical properties (>1 MPa) and rapid healable ability using rationally designed polymerizable deep eutectic solvents (PDESs). 2-Acrylamide-2-methylpropanesulfonic acid (AMPS) has been introduced as a hard monomer in PDES systems, because the AMPS monomer contains the sulfonic acid group with strong hydrogen bond interaction. Through a rapid UV curing process, PDES comonomers can be rapidly polymerized into high performance ICEs in the presence of a photoinitiator. Due to the strong hydrogen-bonding interactions and entanglements between soft and hard chains among the components, the prepared ICEs show rapid healable properties (healing efficiency up to 86.5% in 4 h) while maintaining high mechanical strength (tensile stress up to 5.7 MPa). In addition, the ICEs also have high transparency (average light transmittance up to 92%), good ionic conductivity (0.2–0.7 × 10–2 S/m), and rapid electrical self-healing properties (within 2 s) in the absence of external stimulation. On the basis of their excellent versatility, they can be used as strain sensors to detect human motion. We believe that the study of PDES-based ICEs will provide a method for the development of flexible electronics.
研究领域:
材料科学
·
柔性电子技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Weisin Chen,Juan Li,Dehua Meng,Fangrui Liu,Lei Huang,Ning Wang,Guokang Mo,Haifeng Liang,Dihan Su,Jian Zhang,Libo Jiang
With four levels of formations and functional properties similar to biological tissues, protein hydrogel attracts great attention from researchers and clinical practitioners for broad applications. However, hydrogels with high water content usually exhibit poor mechanical properties, which limit their widespread application. In the study, a general and feasible approach was used to enhance the regenerated silk fibroin (RSF) hydrogel's mechanical strength by mimicking the human skeleton biomineralization process in vitro. The final mechanical strength was around 4.5 MPa, and the compressive modulus was around 0.90 MPa after combining the effects of ethanol induction of β-sheet and mineralization by SBF, reaching 3 times higher strength than the original RSF hydrogel. The mineral composition and chemical structure proved that the biomineralization of HAp apposition within amorphous hydrophilic domains enhanced the mechanical properties of RSF hydrogel. In vivo RSF hydrogel mineralization was observed after subcutaneous implantation in rats. The femoral bone defect model demonstrated that the biomineralized RSF hydrogel maintained the bone structure from collapse in the early phase. In summary, a straightforward method for fabricating high-strength biomineralized RSF hydrogel through a slow-and-low approach, i.e., low SBF concentration and longer immersion time, was developed and is promising for treating bone diseases.
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DOI
PubMed
高影响因子
Polymers
·
2019
·Vol. 11
·期 7
·1112
·
IF 3.164
Yanqin Wang,Yanan Xue,Jinghui Wang,Yaping Zhu,Yu Zhu,Xuehui Zhang,Jingwen Liao,Xiaona Li,Xiaogang Wu,Yi-Xian Qin,Weiyi Chen
In this work, to obtain a novel composite hydrogel with high mechanical strength, fluorescence and degradable behavior for bone tissue engineering, we prepare a nanofiller and double-network (DN) structure co-enhanced carbon dots/hydroxyapatite/poly (vinyl alcohol) (CDs/HA/PVA) DN hydrogel. The composite hydrogels are fabricated by a combination of two fabrication techniques including chemical copolymerization and freezing‒thawing cycles, and further characterized by FTIR, XRD, etc. Additional investigations focus on the mechanical properties of the hydrogel with varying mass ratios of CDs to PVA, HA to PVA and different numbers of freezing/thawing cycles. The results show that the as-prepared CDs3.0/HA0.6/PVA DN9hydrogel has optimized compression properties (Compression strength = 3.462 MPa, Young’s modulus = 4.5 kPa). This is mainly caused by the synergism effect of the nanofiller and chemical and physical co-crosslinking. The water content and swelling ratio of the CDs/HA/PVA SN and DN gels are also systematically investigated to reveal the relationship of their microstructural features and mechanical behavior. In addition, in vitro degradation tests of the CDs/HA/PVA DN hydrogel show that the DN hydrogels have a prominent degradable behavior. So, they have potential to be used as high-strength, self-tracing bone substitutes in the biomedical engineering field.Keywords:double-network;hydrogel;mechanical strength;fluorescence;degradable
研究领域:
材料科学
·
生物医学工程
·
组织工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qiaoyun Wu,Shuai Wang,Lili Ren,Wei Song,Li Zhang,Nan Wu
Creating flexible hydrogels that combine high mechanical strength, conductivity, and functionality remains a challenge. Sodium carboxymethyl cellulose (CMC) was successfully added to a double network composite hydrogel based on polyacrylamide (PAM)/gelatin, resulting in a synergistic improvement in visualization, excellent mechanical properties (stress = 0.458 MPa, strain = 946 %, toughness = 1.97 MJ/m 3 ), strong self-adhesion (adhesion strength = 6.21–8.91 kPa), and a broad range of sensitive conductivity (GF = 2.42–7.21, response time = 210 ms). It also demonstrated potential for dynamic anti-counterfeiting. Results showed that adding CMC increased the hydrogel's suitability for visualization and significantly boosted its mechanical properties, enabling it to be both conductive and strain-sensitive. This makes it suitable for monitoring human movements and emotional changes. Additionally, the hydrogel displayed universal self-adhesive properties, allowing it to adhere stably to human skin and accurately track large joint movements and micro-expressions. For further functionality, the hydrogel's transparency was enhanced by ionic crosslinking through immersion in CaCl₂ solution, and its dynamic optical response offers new possibilities for anti-counterfeiting. The combined use of CMC and ion regulation overcomes the usual trade-offs between mechanical strength, conductivity, and visualization in traditional hydrogels. This creates a high-performance material platform for next-generation multifunctional flexible wearable sensors and paves the way for advances in human-computer interaction, flexible electronic skin, and visual sensors.
研究领域:
材料科学
·
生物医学工程
·
柔性电子学
·
传感器技术
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Mingjie Wen,Bin Chen,Xiaohui Wang,Ruixue Ma,Chuntai Liu,Wei Cao,Zhen Wang
Compared to polymer fibers , it is still challenging for fabricating large-scale polymer products with superb mechanical properties . Herein, high density polyethylene (HDPE) films reinforced with carbon nanotubes (CNTs) were prepared via an ingenious high-speed melt stretching strategy. With employing a homemade two-drum extensional rheometer , the maximum 80 × stretch ratio of supercooled melt was realized within very short time of 220 ms. The achieved nanocomposite films present the highest tensile strength of 147 MPa in reported HDPE-based composites, while the Young's modulus keeps simultaneously a high level of 2300 MPa in spite of low filler fraction of 3 wt%. Furthermore, the nanocomposite films display an excellent erosion resistance, ensuring the durability in harsh using environments. Microstructural characterization indicates a strong synergy between high-speed melt stretching and CNTs in (1) forming the densely distributed shish-kebab superstructures , (2) making a nearly perfect orientation of shish-kebab crystal and (3) reinforcing the physical connectivity of shish-kebab network. The construction of such characteristic microstructures greatly improves the transfer of mechanical load and underlies a significant enhancement on the mechanical performance. Due to the ultrastrong nanocomposite films fabricated directly by melt processing, the current work is of guiding significance in engineering practice and lights a feasible path towards expanding applications of general plastics to some special occasions like collision protection and structural materials.
研究领域:
材料科学
·
高分子科学
·
机械工程
✓ 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）