FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiang-Shu Hu,Xin Jing,Jing-Wen Mei,Fu-Xiang Liu,Pei-Yong Feng,Jiayi Xu,Yue-Jun Liu
Hydrogels have emerged as ideal materials for sensor fabrication due to their tunable mechanical properties, flexibility, and biocompatibility. However, their high-water content makes them prone to freezing at low temperatures, which compromises their conductivity and mechanical integrity, limiting their use in cold environments. To address this issue, we present a novel hydrogel system consisting of a polyacrylamide (PAM) backbone, a binary solvent system of water and ethylene glycol (EG), and functional materials including polyvinyl alcohol (PVA) and modified MXene. The addition of modified MXene as a conductive filler significantly enhances the hydrogel's conductivity, enabling it to maintain its performance even at low temperatures. Furthermore, the introduction of EG effectively lowers the freezing point of the hydrogel to −36.9 °C, ensuring robust frost resistance. The resulting hydrogel not only shows exceptional low-temperature stability but also exhibits high sensitivity. Moreover, the hydrogel demonstrates rapid responsiveness and high accuracy when being integrated as sensors to detect human motion and ammonia concentrations. These results highlight the potential of MXene-enhanced hydrogels for applications in freshness detection of raw meat and human motion tracking, particularly in cold environments.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
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
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 5
·1-16
·
IF 23.2
Ge Fangqing,Peng Jun,Tan Jialing,Yu Weidong,Li Yuning,Wang Chaoxia
Flexible wearable heater plays a critical role in maintaining a consistent human body temperature, particularly during outdoor activities in cold environments, where garment elasticity, stretchability, and mechanical strength are paramount. Thus, there is an urgent demand for the development of flexible wearable heaters. In this study, we have successfully engineered a photo-thermochromic elastic fiber with control over its color properties via a continuous wet-spinning process. Through the incorporation of a modest amount (as little as 0.5%) of photothermally active polyaniline (PANI) and polydopamine (PDA) nanoparticles, this fiber exhibits exceptional photothermal conversion performance compared to pure thermoplastic polyurethane (TPU) fiber. Notably, when exposed to 600 W m −2 irradiation for 600 s, the equilibrium temperature of the photo-thermochromic elastic fiber rises impressively from the ambient 20.0 °C to 53.5 °C. A significant feature of this fiber is its reversible color-changing capability, which can be conveniently controlled by manipulating the light source. This innovative characteristic empowers the user to monitor the fiber’s temperature by observing its color shifts. Furthermore, the fiber boasts exceptional stretchability, with an impressive elongation capacity of up to 500%, and remarkable resistance to washing, enduring up to 25 cycles. Taking this innovation further, we integrate the fiber into a fabric that maintains its superior photothermal conversion performance, mechanical resilience, and the ability to undergo reversible color changes when exposed to sunlight. This stretchable and vibrant photo-thermochromic elastic fiber holds significant promise as an energy-efficient alternative and is poised to find exciting applications in the realm of smart textiles.
研究领域:
材料科学
·
纺织工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 64
·期 2
·779-787
·
IF 3.2
Xiang Zhang,Zhenggang Xiao
Organic anticorrosion coatings (OACs) are the most effective, economical, and environmentally friendly protection strategy for metals. However, the traditional OACs usually inevitably suffer mechanical cracks during their service life. If not repaired in time, the resultant cracks in OACs will result in irreparable corrosion of the metal substrate. More detrimentally, these microcracks are not easily detectable at the initial stage. If OACs can autonomously heal their damage at the initial stage, the microcracks will be repaired in time and the metal substrate will be protected well. Thus, giving OACs the self-healing capability is a promising strategy for metal protection. Herein, an autonomously self-healing TiO 2 -reinforced silicone polyurea (SPU- g -TiO 2 ) elastomer was successfully designed as anticorrosion coating for Q235 carbon steel (QCS) protection. The SPU- g -TiO 2 elastomer matrix exhibited excellent stretchability with a maximum strain of 3826.72% and fast self-healing ability with an outstanding self-healing efficiency of 98.69% for 6 h without any external stimulus at room temperature. The QCS coated with SPU- g -TiO 2 showed excellent damage resistance and good anticorrosive ability, and it can self-heal the microcracks generated in its coating in time to prevent corrosive media corroding the internal mental substrate. This work has a positive guiding significance for the development of functional OACs to improve their protection for metallic materials. Highlights A bionic smart self-healing SPU- g -TiO 2 coating was successfully synthesized. The mechanical and self-healing properties are balanced using nanoparticles. The coating features excellent self-healing capability and stretchability. Q235 steel coated with SPU- g -TiO 2 shows good anticorrosive ability.
研究领域:
材料科学
·
腐蚀工程
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聚合物化学
✓ 已验证
DOI
高影响因子
COMPUTERS AND ELECTRONICS IN AGRICULTURE
·
2023
·
IF 8.3
Chunchun Qu,Wenxiu Sun,Daiwei Hu,Chao Yang,Tiankai Zhao,Xiqing Wang,Zhizhu He
The excellent stretchability and biocompatibility of flexible sensors have inspired an emerging field of plant wearables that enable intimate contact with plants to monitor growth status and local microclimate in real-time continuously. Flexible plant wearables provide a promising platform for the development of plant phenotypes. In this work, we have fabricated several plant wearables that can harmlessly and continuously monitor leaf temperature/humidity, which are critical parameters for analyzing the physiological status and microclimate of plants. Credited to the unique semi-embedded design and the selected biocompatible materials, we achieve ultrathin sensors with a conductive layer thickness of 7 μm, exhibiting excellent electrical conductivity with 9.43 × 10 6 S/m, bendability and fatigue resistance with 0.99 % change rate after 10,000 cyclic bending tests, enabling on-site and non-destructive testing. These plant wearables can be used as a non-invasive, high-throughput, low-cost toolbox with excellent potential for phenotypic analysis.
研究领域:
农业工程
·
植物生理学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yechang Feng,Zhuangzhuang Chu,Limin Man,Yang Hu,Chaoqun Zhang,Teng Yuan,Zhuohong Yang
Herein, fishbone-like poly(methyl eleostearate) (PME) plasticizer with high biobased content of near 90% was developed for the production of flexible poly(vinyl chloride) (PVC) by the green cationic polymerization of biobased monomer methyl eleostearate (ME) using renewable coconut oil as solvent, rather than the traditional alkyl halides with toxicity and volatility. The microstructure of PME was investigated by multiple technologies, and the results show that the favored microstructure of PME is the 9,10-unit because of the lower surface electrostatic potential and average local ionization energy near the double bond at C9 and C10. The acute toxicity test of PME shows that it is biologically safe and nontoxic. The effect of content of PME and the commercial plasticizer bis(2-ethylhexyl) phthalate (DOP) on the performance of plasticized PVC was investigated. When the weight ratio of PME and DOP is fixed at 1:1, PVC film presents higher stretchability (604.7% vs 309.1%) and enhanced strength (21.0 MPa vs 11.0 MPa) compared with PVC plasticized with DOP. A possible mechanism related to chain entanglements and dipole–dipole interaction is proposed. Further, as DOP is substituted with PME, PVC films show improved migration resistance with the weight loss being more than 75% lower after leaching in petroleum ether and olive oil.
研究领域:
材料科学
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聚合物化学
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环境科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Protocols
·
2024
·
IF 13.1
Zhang Kailin,Shi Xiang,Jiang Haibo,Zeng Kaiwen,Zhou Zihao,Zhai Peng,Zhang Lihua,Peng Huisheng
Mono-dimensional fiber-based electronics can effectively address the growing demand for improved wearable electronic devices because of their exceptional flexibility and stretchability. For practical applications, functional fiber electronic devices need to be integrated into more powerful and versatile systems to execute complex tasks that cannot be completed by single-fiber devices. Existing techniques, such as printing and sintering, reduce the flexibility and cause low connection strength of fiber-based electronic devices because of the high curvature of the fiber. Here, we outline a twisting fabrication process for fiber electrodes, which can be woven into functional threads and integrated within textiles. The design of the twisted thread structure for fiber devices ensures stable interfacing and good flexibility, while the textile structure features easily accessible, interlaced points for efficient circuit connections. Electronic textiles can be customized to act as displays, health monitors and power sources. We detail three main fabrication sections, including the fabrication of the fiber electrodes, their twisting into electronic threads and their assembly into functional textile-based devices. The procedures require ~10 d and are easily reproducible by researchers with expertise in fabricating energy and electronic devices.
研究领域:
材料科学
·
纺织工程
·
可穿戴技术
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomaterials Science
·
2022
·Vol. 10
·期 9
·2417-2427
·
IF 7.59
Wenliang Xue,Rong Yang,Shuai Liu,Yajie Pu,Penghui Wang,Wenjie Zhang,Xiaoyan Tan,Bo Chi
Adhesives for gastric hemorrhage are of great clinical significance. However, it remains a major challenge in clinics due to its poor stability under acidic environments and low adhesion to wet tissues. Herein, inspired by the high adhesiveness of the ascidian secretory protein, we designed a series of aciduric bionic hydrogel adhesives (PDTAs) based on poly(γ-glutamic acid) (γ-PGA) and tannic acid (TA). The formation of hydrogel adhesives was attributed to the abundant hydrogen bonds between amide groups of PGA-DA and polyphenol groups of TA. These hydrogel adhesives exhibited enhanced wet tissue adhesion (400%), higher stretchability (800% elongation), and aciduric stability (7 days) compared with commercial fibrin glue. Rodent wound models indicated that the hydrogel adhesives demonstrated significant healing promotion due to ameliorating collagen deposition and angiogenesis. These hydrogel adhesives show great potential in treating gastric hemorrhages and promoting wound healing.
研究领域:
生物医学工程
·
材料科学
·
组织工程
·
胃肠病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Liwei Lu,Jianben Xu,Jiongchao Li,Yuedong Xing,Zhongqun Zhou,Faai Zhang
High-performance elastomers that possess a combination of high mechanical toughness and fast healability have garnered extensive interest because of their diverse application potential. Inspired by the unique multiple hydrogen bond (H-bond) structure of spider silk and the rapid dynamic exchange of hindered urea bonds (HUBs), a self-healing polyurea elastomer with ultrahigh toughness was designed by incorporating dynamic sextuple H-bonds and HUBs into the polymer chain. Such a design affords high stretchability (1586%), excellent toughness (45.53 MJ m–3), good self-healing efficiency (91.6%), fracture energy (39.68 kJ m–2), and recyclability. The high mechanical performance and good healability are attributed to the presence of reversibly cross-linked noncovalent sextuple H-bonds and dynamically covalent HUBs, which have been validated by stress relaxation tests. Meanwhile, by substituting the chain extender adipic dihydrazide with hexamethylenediamine, which possesses a comparable structure but fewer amide bonds, the effect of sextuple H-bonds on elastomers was confirmed. More importantly, when a conductive layer of graphene oxide was applied to the surface of the resulting elastomer, the elastomers exhibited potential applications in strain sensors.
研究领域:
材料科学
·
聚合物化学
·
机械工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qishu Lu,Wenxia Liu,Duo Chen,Dehai Yu,Zhaoping Song,Huili Wang,Guodong Li,Xiaona Liu,Shaohua Ge
The synthesis of liquid metal-infused hydrogels, typically constituted by polyacrylamide networks crosslinked through covalent bonds , often encounters a conundrum: they exhibit restricted extensibility and a diminished capacity for self-repair, owing to the inherently irreversible nature of the covalent linkages. This study introduces a hydrophobically associated hydrogel embedding gallium (Ga)-droplets, realized through the in situ free radical copolymerization of hydrophobic hexadecyl methacrylate (HMA) and hydrophilic acrylamide (AM) in a milieu containing xanthan gum (XG) and PEDOT:PSS, which co-stabilizes the Ga-droplets. The Ga-droplets, synergistically functioning as conductive agents alongside PEDOT:PSS, also expedite the hydrogel's formation. The resultant XG/PEDOT:PSS-Ga-P(AM-HMA) hydrogel is distinguished by its remarkable extensibility (2950 %), exceptional toughness (3.28 MJ/m 3 ), superior adherence to hydrophobic, smooth substrates, and an innate ability for hydrophobic-driven self-healing. As a strain sensing medium, this hydrogel-based sensor exhibits heightened sensitivity (gauge factor = 12.66), low detection threshold (0.1 %), and robust durability (>500 cycles). Furthermore, the inclusion of glycerol endows the XG/PEDOT:PSS-Ga-P(AM-HMA) hydrogel with anti-freezing properties without compromising its mechanical integrity and sensing acumen. This sensor adeptly captures a spectrum of human movements, from the nuanced radial pulse to extensive joint articulations. This research heralds a novel approach for fabricating multifaceted PAM-based hydrogels with toughness and superior sensing capabilities.
研究领域:
材料科学
·
纳米技术
·
传感器
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Qu Zeng,Sihui Wan,Shujuan Yang,Xinyu Zhao,Furui He,Yamei Zhang,Xinyu Cao,Qiyan Wen,Yuhong Feng,Gaobo Yu,Lisha Pan,Jiacheng Li
Bionic hydrogel sensors have been known as promising alternatives to biomimetic skins. Here, a bionic hydrogel sensor based on sodium alginate (Alg), polyacrylamide (PAAM) and Fe 3+ have been fabricated by a simple one-pot method, shows super stretchability, excellent adhesion and conductivity. The Fe 3+ /Alg-PAAM hydrogel was endowed with a dynamic coordination dual-network structure based on controllable Fe 3+ penetration and free radical polymerization dual effect, which was equipped with the synergistic properties of high storage modulus (2200 KPa), super stretchability (1800%) and strong adhesion to various substrates (glass adhesion with 61.8 KPa). Moreover, due to abundant free ions, the Fe 3+ /Alg-PAAM hydrogel displays good conductive behavior, and further shows excellent sensing behavior and strain sensitivity as a skin sensor to monitor human movement. This work enriches the design and preparation strategies of flexible hydrogels to promote the application of Alg-based materials for the wearable electronic devices and intelligent monitoring systems.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Xiaoming Qi,Wenjun Wang,Hongbo Dai,Yaofeng Zhu,Yubing Dong,Shao-Yun Fu,Qingqing Ni,Yaqin Fu
Shape memory polymer fibers (SMPFs) coated with conductive layers are attracting increasing attention in soft robots and wearable electronics. However, the thickness and poor stretchability of the conductive layer hinder its applications. Here, the multifunctional two-way shape memory reduced graphene oxide (RGO)/ethylene–vinyl acetate copolymer (EVA) composite yarn is designed following the “swelling-ultrasonicating” and one-step twisting procedures. These RGO/EVA composite fiber conductive paths connected with each other by constructing the helical conductive network. The RGO/EVA composite yarn presents excellent electro-thermal conversion performance and outstanding load-bearing capability, enabling controlled electro-driven reversible strain (more than 10% reversible strain) and high energy density (72.5 J/kg). Additionally, the composite yarn has great stretchability (130% strain), high strain sensing sensitivity (gauge factor of 7.3), large linear working range (up to 70% strain). This work provides an innovative manufacturing strategy for the RGO/EVA composite yarn with two-way shape memory, electro-driven actuation, and strain sensing performance.
研究领域:
材料科学
·
机器人技术
·
可穿戴技术
·
复合材料
·
机电系统
✓ 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）