ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 30
·期 6
·1908411
·
IF 15.621
Zhaoling Li,Miaomiao Zhu,Jiali Shen,Qian Qiu,Jianyong Yu,Bin Ding
With the rapid advancement in artificial intelligence, wearable electronic skins have attracted substantial attention. However, the fabrication of such devices with high elasticity and breathability is still a challenge and highly desired. Here, a route to develop an all-fiber structured electronic skin with a scalable electrospinning fabrication technique is reported. The fabricated electronic skin is demonstrated to exhibit high pressure sensing with a sensitivity of 0.18 V kPa −1 in the detection range of 0–175 kPa. This wearable device could maintain prominent sensing performance and mechanical stability in the presence of large deformation, even when the elastic deformation is up to 50%. The electronic skin is easily conformable on different desired objects for real-time spatial mapping and long-term tactile sensing. Besides, it possesses high gas permeability with a water vapor transmittance rate of 10.26 kg m −2 d −1 . More importantly, the electronic skin is capable of working in a self-powered manner and even serves as a reliable power source to effectively drive small electronics. Possessing several compelling features, such as high sensitivity, high elasticity, high breathability as well as being self-powered and scalable in fabrication, the presented device paves a pathway for smart electronic skins.
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
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Ping Zhang,Weiyu Zhou,Yunfeng He,Ziyi Xu,Maochun Li,Wei Hong,Canhui Yang
Adhesives are ubiquitous, but the mutual exclusion between hyperelasticity and adhesiveness impedes their uses in emerging techniques such as flexible/stretchable electronics. Herein, we propose a strategy to synthesize hyperelastic adhesives (HEAs), by designating hyperelasticity and adhesiveness to the bulk and the surface of a polymer network, respectively. The bulk is hyperelastic but nonadhesive, and the surface is viscoelastic but adhesive, while the HEA is hyperelastic and adhesive. We exemplify the principle by synthesizing poly(butyl acrylate) as the bulk and poly(butyl acrylate-co-isobornyl acrylate) as the surface. The resulting HEA exhibits a low hysteresis of 4% at 100% strain and an adhesion energy of 270 J m–2. Moreover, the HEA is optically transparent, thermally stable, spontaneously adhesive to various materials, and mechanically stable against cyclic load, relaxation, and creep. We demonstrate two applications enabled by the unique combination of hyperelasticity and adhesiveness. The proposed strategy is generic, paving new avenues for stretchable yet resilient adhesives for diverse applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Beibei Zhu,Jie Zhou,Lubin Ni,Guowang Diao
Rapid pollutant removal technology has increasingly become one of the main components of environmental governance technology. Herein, porous g-C 3 N 4 /three-dimensional high elastic graphene sponge (CN/HEGS) composites were fabricated by introducing porous g-C 3 N 4 into three-dimensional highly elastic graphene sponge. The structure, morphology, light absorption ability and charge separation of the composite were characterized by a series of detection methods. The optimal CN/HEGS-90 presented high adsorption capacity and photocatalytic activity for tetracycline. The synergism of adsorption and photocatalysis is the main reason for the rapid degradation of the composites. The polymerization of amino compounds with epoxy bonds is the essence of the formation of three-dimensional interconnected porous sponge with high adsorption performance. The introduction of CN with visible light adsorption property and the composite structure formed between CN and HEGS promote efficient photogenerated charge transfer and transmission. This work provides an idea for the design and synthesis of composite catalysts with high efficiency and rapid pollutant degradation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2021
·
IF 6.988
Jing Yu,Kai Xu,Xiaojing Chen,Xiaodan Zhao,Yuxuan Yang,Dake Chu,Yongliang Xu,Qiang Zhang,Yanfeng Zhang,Yilong Cheng
Noncovalent cross-linked hydrogels with promising mechanical properties are on demand for applications in tissue engineering, flexible electronics, and actuators. However, integrating excellent mechanical properties with facile preparation for the design of hydrogen bond cross-linked hydrogels is still challenging. In this work, an advanced hydrogel was prepared from acrylamide and N-acryloyl phenylalanine by one-pot free-radical copolymerization. Owing to hydrophobicity-assisted multiple hydrogen bonding interactions among phenylalanine derivatives, the hydrogels exhibited fascinating mechanical behaviors: tensile strength of 0.35 MPa, elongation at break of 2100%, tearing energy of 1134 J/m2, and compression strength of 3.56 MPa. The hydrogels also showed robust elasticity and fatigue resistance, and the compression strength did not show any decline, even after 100 successive cycles, as well as promising self-recovery property. In addition, the cytotoxicity test in vitro proved that the hydrogel showed good biocompatibility with normal human liver cells (LO2 cells). The excellent stretchability, robust elasticity, high toughness, fatigue resistance, and biocompatibility of the hydrogel demonstrated its vast potential in the biomedical field and flexible electronic devices.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Zhan Sun,Huitao Yu,Can Chen,Mengmeng Qin,Wei Feng
Thermal conductive polymer fibers have broad development prospects because of its excellent thermal and mechanical properties. However, currently reported polymer fibers cannot simultaneously possess high thermal conductivity and high resilience, which greatly limits the application of thermal conductive polymer fibers. Therefore, preparing fibers with high thermal conductivity and high resilience is extremely challenging. The thermoplastic polyurethane/boron nitride liquid metal (TPU/BN-LMs) fiber with core sheath structure is prepared by coaxial wet spinning technology, the boron nitride (BN) doped in thermoplastic polyurethane elastomer (TPU) as sheath and the liquid metal (LMs) as core. The maximum tensile strength of the fiber is 3.9 MPa, and the elongation can reach 400 %. After multiple cycles of stretching, it can return to its original state. In addition, the thermal conductivity of the fiber in the horizontal direction and the vertical direction are 10.0 W m −1 K −1 and 4.6 W m −1 K −1 , respectively. This work solves the current problem of high thermal conductivity and high resilience of thermally conductive polymer fibers that are difficult to be compatible. And it provides a new research idea for the design and preparation of new high thermal conductivity and high resilience polymer fiber materials.
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
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Jie Cao,Yajun Wu,Liang Li,Miaomiao Hu,Yun Cheng,Hang Zhang,Jintang Guo
The mechanical strength of conventional hydrogels is inadequate for preventing leakage in high-temperature and high-salinity reservoirs, primarily due to the increased mobility of polymer chains and the degradation of crosslinked networks. Herein, we employed the strategy of ’network nesting and layer reinforcement’ to design a hybrid multi-site crosslinked hydrogel. This approach enhances the interconnections between polymer chains and fortifies the crosslinked network. The shear rheological behavior and temperature sensitive characteristics of the profile control working fluids were evaluated based on rheological dynamics. In the high temperature (140 ℃) and high salinity (21.81 × 10 4 mg/L) preparation environment, the effects of different components to the mechanical strength of the hydrogel were investigated under dynamic shear and uniaxial compression conditions. The incorporation of N-(hydroxymethyl)acrylamide (NMA) in the copolymerization with acrylamide (AM) resulted in an increase in the covalent cross-linking density, leading to a rise in the shear elastic modulus from 105 Pa to 238 Pa. The use of pre-gelatinized cassava starch (PGCM) as the grafting framework enhanced the bonding between the polymer chains, as evidenced by the increase in uniaxial compressive strength from 0.018 MPa to 0.081 MPa and the rise in peak strain from 55.0 % to 72.9 %. Furthermore, the synergistic effect of fumed silica (AEROSIL), which exploits mechanical coupling between inorganic nano-fillers and organic polymers, increased the compressive strength from 0.081 MPa to 0.418 MPa and raised the peak strain from 72.9 % to 81.8 %. It provides an effective approach to enhance the plugging performance of hydrogels in high temperature and high salinity reservoirs.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Bioprinting
·
2021
·
IF 6.638
Kaiwen Chen,Qiwei Ying,Xingxing Hao,Kai Sun,Huanan Wang
A hydrogel that combines both printability and adaptability, high elasticity, and stretchability can provide ideal mechanical properties, and also render complex and accurate construction for ionic skin. However, it is extremely challenging. Here, we propose a colloidal-based double-network (DN) hydrogel as printable inks for high-precision fabrication of ionic skins. Particularly, polyacrylamide (PAAm), as the covalent network that can maintain the long-term material integrity, was combined with gelatin colloidal network to improve the injectability and printability of the resulting DN hydrogels. The DN design cooperatively provides the hydrogels with higher toughness values and deformability than what single colloidal or PAAm network can achieve. Further design of ionic skin based on capacitor microarray was demonstrated to serve as a sensitive and stable capacitor that can respond to external stimuli, thereby allowing to sense the body movements such as finger bending, laugh, and wrist pulse by translating mechanical changes into electric signals. Therefore, this study provides a novel strategy for the design and preparation of high-resolution ionic skins as the wearable sensor.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 9
·期 5
·1384-1394
·
IF 5.344
Xiaobin Lin,Qingyi Xie,Chunfeng Ma,Guangzhao Zhang
Silicone elastomer coatings have attracted increasing attention owing to their eco-friendly nature, excellent fouling release ability and drag-reducing property. However, the poor mechanical properties and lack of fouling resistance limit their applications. Herein, a silicone-based polyurethane with 2-ureido-4[1H]-pyrimidinone (UPy) and amphiphilic pendant chains is reported. The UPy groups and urethane can form hydrogen bonds with various substrates so that the coating has significantly improved adhesion strength (0.9–3.0 MPa) compared with the PDMS elastomer (0.3–0.4 MPa). Moreover, the quadruple hydrogen bonding between UPy moieties allows the polymer to have excellent self-healing ability and high elasticity. The modified polymeric coating has low surface energy (24 mJ m−2) and low elastic modulus (1.9 MPa), so it exhibits good fouling release performance. Besides, the amphiphilic side chains can effectively resist protein adsorption and adhesion of the marine bacteria Pseudomonas sp. and diatom Navicula incerta. The novel design can improve the resistance of silicone coating to biofouling and mechanical forces and is promising for high-performance antifouling coatings.
研究领域:
材料科学
·
海洋生物学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yongwang Liu,Fan Wu,Xiujuan Zhao,Mingxian Liu
In this research, a new type of conductive composite with high tensile strength, high elasticity, and cost competitiveness has been developed through solution mixing–spraying–rolling methods. Naturel rubber (NR) latex with chitin nanocrystals (ChNCs) as reinforcing filler and carbon black (CB) are thermally sprayed on glass substrate layer by layer, and then, spirally structured conductive composites are obtained by rolling the sheets. When the CB content is 4.44%, the conductivity of the NR/ChNCs-CB composite can reach 6.92 s/m. The tensile strength of 5% ChNCs reinforced conductive composites is 3.47 MPa, which is 3.1 times that of NR-CB composites without ChNCs. The strain sensor exhibits a high gauge factor (GF ≈ 5) and electrical conductivity stability in a small deformation range and still shows good stability and recoverability upon 25%, 50%, and 100% strain. The high-sensitivity strain sensors are further employed for monitoring human activities such as finger movements and pronunciation, which shows good reproducibility and reliability. This study provides a routine of preparing highly stretchable and multifunctional strain sensors based on inexpensive raw materials by a simple manner, which opens up new opportunities for the development of stretchable electronic devices.
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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xiaodong Hu,Shanshan Zhang,Bo Yang,Ming Hao,Zhijun Chen,Yanbo Liu,Seeram Ramakrishna,Xiaoxiao Wang,Jinbo Yao
Recently, cellulose-based biomass aerogel, as a high performance adsorption material, has received considerable attention. However, it remains a huge challenge to prepare cellulose aerogels with outstanding mechanical properties by simple and environmentally-friendly strategies. Here, we describe a green one-pot method to prepare a versatile bacterial cellulose/γ-(2,3-epoxypropoxy) propytrimethoxysilane trimethoxysilane composite aerogel (BK aerogel). The elasticity of BK aerogel is significantly improved and up to 96.4% after compression under 80% strain. Further, the elastic recovery can reach 87.8% over 50 times compressions at a set strain of 80 %, implying the obtained composite aerogel possesses strong fatigue resistance. BK aerogel could be soaked in water to adsorb cationic dyes and reused without being damaged. In addition, the prepared BK aerogel is rich in hydroxyl and epoxy groups, so its surface chemistry can be further adjusted. Taking hydrophobic modification as an example, the prepared aerogel can be used for oil–water separation and reused by mechanical squeezing. This study paves a simple and green solution for developing high elastic cellulose nanofiber aerogel with adjustable surface chemistry to meet diverse applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 25
·2301713
·
IF 15.1
Shaowei Han,Huanhuan Tan,Jia Wei,Hang Yuan,Songwei Li,Peipei Yang,Haoyang Mi,Chuntai Liu,Changyu Shen
Conductive hydrogels exhibit high potential in the fields of wearable sensors, healthcare monitoring, and e-skins. However, it remains a huge challenge to integrate high elasticity, low hysteresis, and excellent stretch-ability in physical crosslinking hydrogels. This study reports the synthesis of polyacrylamide (PAM)-3-(trimethoxysilyl) propyl methacrylate-grafted super arborized silica nanoparticle (TSASN)-lithium chloride (LiCl) hydrogel sensors with high elasticity, low hysteresis, and excellent electrical conductivity. The introduction of TSASN enhances the mechanical strength and reversible resilience of the PAM-TSASN-LiCl hydrogels by chain entanglement and interfacial chemical bonding, and provides stress-transfer centers for external-force diffusion. These hydrogels show outstanding mechanical strength (a tensile stress of 80–120 kPa, elongation at break of 900-1400%, and dissipated energy of 0.8–9.6 kJ m −3 ), and can withstand multiple mechanical cycles. LiCl addition enables the PAM-TSASN-LiCl hydrogels to exhibit excellent electrical properties with an outstanding sensing performance (gauge factor = 4.5), with rapid response (210 ms) within a wide strain-sensing range (1–800%). These PAM-TSASN-LiCl hydrogel sensors can detect various human-body movements for prolonged durations of time, and generate stable and reliable output signals. The hydrogels fabricated with high stretch-ability, low hysteresis, and reversible resilience, can be used as flexible wearable sensors.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yifan Ma,Changru Zhang,Yanxiang Wang,Lanzhu Zhang,Jingjing Zhang,Jun Shi,Jiawen Si,Yuan Yuan,Changsheng Liu
Due to the anatomical and functional complexities, craniomaxillofacial defects are considered as one of the most intractable orthopedic challenges worldwide. Despite substantial attention given to the development of tissue-engineering biomaterials, poor customization, function, and clinical application of current artificially fabricated bone grafts remain, particularly undesirable mechanical properties and bioactivity to reproducibly regenerate new bone, and lack of surgical and clinical significance. To address these drawbacks, a freestanding 3D-printing bioscaffold with the biomimetic formulation and highly customized performance was developed. With the incorporation of urethane-based PEGylated poly(glycerol sebacate) (PEGSU) in ceramic bioinks, the resultant scaffolds can be printed with rapid self-prototyping in low temperature, exhibiting enhanced mechanical strength and hyperelasticity, and supporting cell proliferation and osteogenic differentiation. As indicated by in vivo experiments, the printed grid scaffolds can promote new bone formation in critical-sized cranial defects and thus providing instant protection for sensitive tissues after craniectomy. Furthermore, anatomically scaled craniomaxillofacial bone structures can be printed with high fidelity, and finite element analysis confirmed their routine functionalities after implantation. With these advantages, this self-standing 3D printed biomaterial shows great prospect of clinical application in craniomaxillofacial bone regeneration and provides new horizons for other complex reconstructions.
研究领域:
生物医学工程
·
组织工程
·
骨科手术
·
生物材料科学
✓ 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）