MACROMOLECULES
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2025
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IF 5.2
Jing Zhao,Dongmin Cheng,Ran Chen,Xinyi Yang,Yiluo Li,Yuejin Guo,Jingxia Zhang,Ruofei Hu,Junping Zheng
The current strategies prove to be hard for the preparation of polysaccharide-based gels with excellent mechanical properties and high crack propagation resistance. Herein, ultrahigh stretchable polysaccharide-based polyacrylamide/carrageenan/phytic acid (PCP) gels are prepared by integrating strong and dense hydrogen bonds into the network. The phosphate ester bonds contained in phytic acid form strong and dense hydrogen bonds with polyacrylamide and carrageenan, which are 18.6 times higher than those in gel without phytic acid. A large number of hydrogen bonds endows PCP gels with ultrahigh stretchability (>16,000%, without breakage), unprecedented crack propagation strain of 16,000%, high adhesion property (223 kPa), self-healing ability, low-temperature resistance, and moisturizing property. Furthermore, PCP gel can be obtained rapidly and facilely within minutes, integrated into clothes after a facile drawing method, and applied to monitor movement, breathing, and temperature states (e.g., contactless recognition for finger/palm, distinguishing between running phone/nonrunning phone). This study provides an essential strategy for designing or fabricating highly stretchable gel and its application in the wearable electronics field.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
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IF 18.5
Jing Zhao,Ran Chen,Dongmin Cheng,Xinyi Yang,Hong Zhang,Junping Zheng,Ruofei Hu
Natural polysaccharides-based hydrogels have drawn extensive attention yet have been plagued by less desirable stretchability due to their inherent nature. Here, ultra-stretchable starch-based hydrogels (amylopectin/polyacrylamide, AAM) are developed by constructing reversible intramolecular physical interactions. This strategy endows the hydrogel with exceedingly ultrahigh deformation due to a continuous hydrogen bonding network. It can be stretched from less than 0.5 to >300 cm without breakage that the elongation exceeds 600 times the original length. The elongation collected by the universal testing machine reaches up to 36 000% without breakage outperforming previous reports and demonstrating extraordinary stretchability. Furthermore, an interwoven structure of hydrogen bonding interaction and trace covalent bonds make the stress of hydrogel reach 0.28 MPa, accompanied by an ultra-high strain of 22 500% and significant toughness (47 MJ·m −3 ). The hydrogel displays high transparency (≈93%), low-temperature resistance, moisturizing property, and extraordinary interfacial adhesion property. Intriguingly, the aqueous precursor can act as inks to prepare various forms of hydrogel within minutes through the facile writing or drawing method. This hydrogel verifies strong potential in both fields of human motion sensor (After long-term or low-temperature conditions) and energy storage. This study will facilitate the progress of ultra-stretchable or multifunctional hydrogels.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 28
·15937-15949
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IF 4.22
Sun Na,Li Xiangqing
Application of phase change materials (PCMs)-based thermal management technology in flexible electronic devices has been inhibited due to the leakage and strong rigidity of PCMs. A novel flexible composite PCMs with ultrahigh extensibility was developed in this paper. Concretely, a kind of paraffin@copper (PA@Cu) microcapsule with paraffin as core and nano-Cu particle as “flexible” metal shell was prepared by a simple Pickering emulsion method in an aqueous medium. The encapsulation ratio of paraffin reached 98wt%. Then the PA@Cu microcapsules were introduced into uncured liquid silicone to fabricate flexible composite PCMs (PA@Cu/SE). SEM results demonstrated that the microcapsules were tightly and uniformly wrapped in the three-dimensional network structure of silicone elastomer matrix. Owing to the good compatibility of PA@Cu with the polymer elastomer and a barrier for the melted PA provided by the “flexible” nano-Cu shell, the resulting composite PCMs present superior flexibility and thermal reliability. Tensile tests showed that the flexible composites with a relative higher loading of PA@Cu (40wt%) exhibit outstandingly larger extensibility (> 730%) than many reported literatures. In addition, the composites presenting superior thermal protection for biological tissue make them well-suited for thermal management in wearable electronics. Graphical abstract
研究领域:
材料科学
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热能工程
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柔性电子学
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DOI
高影响因子
Applied Materials Today
·
2023
·
IF 8.3
Shaoqiang Gu,Yunlei Zhou,Yanyan Li,Tao Ma,Runhao Guo,Qianying Lu,Jiaxue Zhang,Shitai Cao,Hangyu Zhu,Dongchan Li,Desheng Kong
Stretchable alternating current electroluminescent devices represent an emerging optoelectronic technology with skin-like deformability. Despite robust construction and reliable performances, the conventional sandwiched device is only compatible with simple luminous features instead of complicated patterns. An unconventional design of intrinsically stretchable ACEL panels is reported here, featuring capacitively coupled bottom interdigitated liquid metal electrodes and top hydrogel transparent electrodes. Arbitrary luminous feature resembling the top electrode pattern is readily accessible without tailored designs. A facile procedure is established to construct functional devices exhibiting ultrahigh stretchability to 400% strain and durable performance under repetitive deformations. The successful integration in a soft pneumatic actuator further demonstrates the promising potential of stretchable ACEL panels for graphic information display in soft devices and systems.
研究领域:
材料科学
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光学工程
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2023
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IF 6
Haojie Qian,Xiaowen Xu
Fluorescent hydrogels with fluorescent dyes are widely used for anti-counterfeiting encryption. However, developing highly stretchable and remarkable tear-resistant hydrogels with reusable fluorescence for anti-counterfeiting purposes remains challenging. In this study, we fabricated and characterized double network (DN) hydrogels comprising polyvinyl alcohol-borax (PVA-borax) as the first network and poly(methacrylamide- co -polyethylene glycol- co -pyrenylmethyl acrylate) (P(MAM- co -PEGMA- co -PyMA)) as the second network with varying MAM to PEGMA ratios. SEM images showed the hydrogels had 3D porous structures. FT-IR and thermal properties analysis (DSC and TGA) indicated the presence of hydrogen bonds between PVA-borax and P(MAM- co -PEGMA- co -PyMA) without any chemical bonds. The red shift in characteristic absorption bands at 841 and 710 cm −1 further confirmed the presence of π-π* interactions between pyrene moieties. XRD analysis revealed no significant changes in crystalline phase of the hydrogels, which facilitated the formation of a 3D network due to abundant hydrogen bond presence. When the MAM to PEGMA ratio was adjusted to 9:2, the resulting hydrogels exhibited remarkable properties such as ultra-high stretchability (strain over 3300 %), excellent notch-insensitivity, and exceptional tear resistance (tearing energy over 3.25 × 10 5 J/m 2 ). Importantly, the hydrogel's fluorescence intensity could be reversibly changed by alternatively adding Fe 3+ and EDTA-2Na. It could be reused more than 10 times while maintaining a fluorescence intensity of around 80 %, demonstrating its reliability as a versatile hydrogel probe for Fe 3+ detection with “ON-OFF-ON” fluorescence behavior. Furthermore, the hydrogels demonstrated exceptional 2D encryption and decryption capabilities, highlighting their potential applications in information storage and data security. To improve the level of anti-counterfeiting, multiple encryption approaches such as QR codes and ASCII binary codes were rationally designed. Overall, this study successfully developed a universal DN hydrogel platform with ultra-high stretchability and remarkable tear resistance, capable of rapid encoding and decoding of complex information for smart anti-counterfeiting.
研究领域:
材料科学
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化学
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纳米技术
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防伪技术
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产品关联
DOI
高影响因子
POLYMER
·
2023
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IF 4.6
Liang Liu,Yunxin Chen,Chunxia Zhao,Min Guo,Yuanpeng Wu,Yuntao Li,Dong Xiang,Hui Li,Li Wang,Xiaoyan Zhang
Traditional hydrogel-based strain sensors do not work well under water due to extreme swelling and poor adhesion to substrates in water-rich conditions. Inspired by the jellyfish tentacles, a super stretchable dual crosslinked hydrogel was prepared as a motion sensor underwater. The hydrogel contained a cationic surfactant , hexadecyl trimethyl ammonium bromide (CTAB), that crosslinked with hydrophobic lauryl methacrylate (LMA) units in an AA-LMA copolymer . Al 3+ ions also coordinated with carboxyl groups in PAA chains and amino groups on chitosan (CS) to form ionic crosslink points. The formed hydrogel exhibited excellent anti-swelling characteristics, superior tensile properties (≈3000%), and rapid self-healing performance. Due to the complementary effects of electrostatic interactions and dynamic chemical bond formation, the hydrogel efficiently and repeatably adhered to various biological tissues, such as hogskin and shrimp, in aquatic environments. Moreover, the hydrogel-based strain sensor showed high sensitivity (GF = 2.04) over a wide sensing range from 0 to 1000% strain with high stability in air and water. The prepared materials' unique performance further expands their application prospects in flexible wearable devices , anti-counterfeiting recognition, and other fields in environmental conditions.
研究领域:
材料科学
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生物医学工程
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可穿戴技术
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传感技术
✓ 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）