COMPOSITES SCIENCE AND TECHNOLOGY
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2022
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IF 9.879
Song Qi,Haojie Yao,Jie Fu,Yuanpeng Xie,Yaping Li,Ruixue Tian,Miao Yu,Hengyu Guo
Interest in creating soft active matter that can repeatedly undergo shape morphing and self-sensing in response to external stimuli is growing. Magneto-active soft matter (MASM) with untethered, fast, and reversible shape reconfiguration is highly desirable for diverse applications in biomedical devices , wearable devices , soft robotics. In this work, we develop a heat-assisted magnetic reprogramming strategy for fabricating MASMs capable of reprogrammable shape-morphing and self-sensing functions. The magnetic reprogramming strategy is based on heating thermoplastic matrix above its melting point and reorienting soft-magnetic particle chains by applying magnetic fields during cooling. By reprogramming magnetization profiles through particle chain reconstruction of printed architecture, we demonstrate multiple deformation modes with distinct shape-morphing. This magnetic reprogramming approach enabled multiscale and reprogrammable soft machines with the tunable actuation response, such as adaptive grasping of a soft gripper. In addition, in combining with the unique sensing mechanism of triboelectric skin (tribo-skin), the self-sensing performance of MASMs is realized by using electrical signals to identify the deformation and contact behaviors. We anticipate that the magnetic reprogramming strategy and multimaterial 3D printing-assisted technique can open new avenues for the fabrication of multifunctional MASMs.
研究领域:
软物质物理
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生物医学工程
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智能材料科学
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产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200339
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IF 8.856
Sijia Ren,Jiachun Feng
Shape-morphing materials that can exhibit various shape deformations are highly desirable. In this work, shape-morphing materials with diverse deformation modes are prepared via a facile approach of constructing bilayer structures of SEBS/paraffin blends with different melting temperatures. The bilayer films are prepared using a simple solvent-coating adhesion method, either by adhering two single-layers together and stretching or by adhering two pre-stretched single-layers. These bilayer films show strong interfacial adhesion due to the similar chemical composition of the two layers. By adjusting the programming method, stretching strain, and thickness ratio, the shape deformation behaviors of the resultant bilayer films can be flexibly tuned. To demonstrate the wide applicability of this approach, several 2D sheets with hinge structures as well as a smart dressing are prepared, in which the former can be transformed into 3D configurations and the latter can automatically fit to the human body and peel off. Owing to the advantages of low cost, easy and large-scale preparation, recyclability, and high designability, the approach for preparing shape-morphing bilayer films proposed by this work is versatile and the obtained bilayer films have the potential to satisfy the demands of divergent application fields.
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
Materials Today
·
2019
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IF 24.372
Dongdong Jin,Qianying Chen,Tian-Yun Huang,Jianyong Huang,Li Zhang,Huiling Duan
Reconfigurable micromachines that are highly conscious of changing environments have significant potential for use in biomedical applications, such as minimally invasive surgery, cell manipulation, and tissue engineering. Current nanofabrication approaches with sophisticated designs appear to enhance the controllability of shape transformations, such as bending, folding, and twisting, while minimizing the response time. However, the construction of three-dimensional (3D) structures at a small scale with a high shape-morphing freedom poses challenges because of the lack of applicable materials and effective fabrication techniques. Here, we develop an advanced four-dimensional microprinting strategy for constructing 3D-to-3D shape-morphing micromachines in a single-material-single-step mode. Using direct laser writing, heterogeneous stimulus-responsive hydrogels can be distributed spatially into arbitrary 3D shapes with sub-micrometer features. The material crosslinking densities, stiffnesses, and swelling/shrinking degrees can be modulated by programming the exposure dosage of femtosecond laser pulses and characterized to predict the shape-morphing behaviors via finite-element methods. With our proposed approach, complex 3D reconfigurable compound micromachines with mechanical advantages, which exhibit an excellent deformation-amplifying effectiveness, can be constructed to achieve a rapid, precise, and reversible 3D-to-3D shape transformation in response to multiple external stimuli, and they emerge as promising smart and multifunctional micromachine candidates for various engineering applications.
研究领域:
生物医学工程
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纳米制造
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智能材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2023
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IF 5
Jingyi Zhang,Yu Wang,Yuxi Sun,Shuaishuai Sun,Zhenbang Xu,Jun Li,Ji Li,Xinglong Gong
The soft actuators capable of responding to multiple stimuli and adapting to changing environments have attracted growing interest in the flexible multifunctional materials. However, how to achieve high degree of freedom (DoF), precise control, and complex shape transformation of the multi-stimuli responsive soft actuator, still remains challenging. Here, we report a multi-responsive soft actuator with various controllable sophisticated deformations by integrating a magnetically sensitive elastomer (MSE) with a liquid crystal elastomer (LCE). Through regulating the stimuli strength and the geometrical dimensions and material parameters of elastomers, the bending angle and curling curvature of the actuator are accurately controlled ranging from 0 to 58.9° and from 0.23 to 1.29 cm–1, respectively. The facile material-structural synergistic design drives the complex 3D shape deformations (e.g., bidirectional bending, shrinkage/bending, rolling/bending, and twisting/bending) of the actuator. More importantly, due to its photosensitive characteristics, the shape-morphing of the actuator can be manipulated locally and sequentially, which markedly enriches the DoFs. The flower-shaped actuator displays multiple deformation modes, and the hand-shaped actuator transforms between 8 gestures under the control of laser and magnetic field, proving that the multi-responsive soft actuators have great application potentials in future bioengineering, soft manipulators, and flexible electronics.
研究领域:
材料科学
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机器人技术
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生物医学工程
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机械工程
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软物质物理
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
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2023
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IF 4.6
Xuefeng Li,Yuxin Zhao,Danni Xu,Dapeng Li,Wei Wang,Dezheng Hu,Yiwan Huang,Shijun Long
Thermoresponsive hydrogel-based actuators have shown great potential in tissue engineering, biosensors and soft robots, while the preparation of temperature-driven bilayer hydrogel actuators with rapid responseness and recovery properties remains a challenge. Inspired by the layered heterostructure of human skin, we developed a Janus bilayer structure actuator consisting of thermoresponsive double network (TDN) hydrogel and polydimethylsiloxane (PDMS) elastomer with tough interface adhesion. Specifically, PNaAMPS/P(NIPAM- co -AAm) TDN hydrogel via photocopolymerization of N-isopropyl acrylamide (NIPAM) and acrylamide (AAm) and reinforced by microgel poly(2-acrylamide-2-methylpropane sulfonate sodium salt) (PNaAMPS) was in situ grafted onto benzophenone-activated PDMS surface, exhibiting strong interface adhesion (628 Jm -2 adhesion energy). The thermoresponsive shape deformations of the double-layer structure actuator were controllable by adjusting hydrogel/elastomer thickness ratio and introduction of metal ions , taking advantage of the different swelling and shrinkage characteristics of the hydrogel layer and the elastomer layer. The TDN/PDMS bilayer structure actuator, which integrates the "Janus" structure, thermal responsiveness and photothermal conversion, provides new ideas for the application and remote control of soft robots and soft actuators.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Mengyuan Yin,Yaxing Zhang,Hanxue Liang,Chang Liu,Yanhui Bi,Juanjuan Sun,Weiwei Guo
Stimuli-responsive DNA hydrogels have shown great potential in sensing applications due to their attractive properties such as programmable target responsiveness, excellent biocompatibility, and biodegradability. In contrast to the extensively developed DNA hydrogel sensing systems based on the stimuli-responsive hydrogel-to-solution phase transition of the hydrogel matrix, the quantitative sensing application of DNA hydrogels exhibiting smart shape deformations has rarely been explored. Moreover, bulk DNA hydrogel-based sensing systems also suffer from high material cost and slow response. Herein, free-standing bilayer polyacrylamide/DNA hybrid hydrogel films with programmable responsive properties directed by the sequence of functional DNA units have been constructed. Compared with bulk DNA hydrogels, these DNA hydrogel films with a thickness at the micrometer scale not only greatly reduce the consumption of DNA materials but also facilitate the mass transfer of biomacromolecular substances within the hydrogel network, thus favoring their sensing applications. Therefore, a target-responsive smart DNA hydrogel film-based sensor system is further demonstrated based on the large amplitude macroscopic shape deformation of the film as a visual signal readout. As a proof of concept, Pb2+ or UO22+ ion-responsive DNA units were introduced into the active layer of the bilayer hydrogel films. In the presence of Pb2+ or UO22+ ions, the occurrence of a cleavage reaction within the DNA units leads to the release of DNA segments from the hydrogel film, inducing a dramatic shape deformation of the film, and thus sensing of Pb2+ or UO22+ ions with high specificity is achieved based on measuring the bending angle changes of these smart free-standing films. These smart DNA hydrogel film sensors with target-programmable responsiveness, simple operation, and ease of storage may hold promise for future rapid on-site testing applications.
研究领域:
生物化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2025
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IF 5.1
Yao Li,Yong Ye,Ju Guo,Yi Liu,Songlun Liu,Yong Chen,Bing Du,Liang Chang
Fluorescent hydrogels were considered a superior platform for developing functional materials in multiple application areas to date. The design and application of aggregation-caused quenching (ACQ) based fluorophores in fluorescent hydrogels are fundamentally constrained by their inherent aggregation-caused quenching behavior. Herein, we report the first fluorescent hydrogel utilizing a perylene diimide (PDIC) as a covalent crosslinker, overcoming inherent ACQ limitations to enable multidimensional information encryption. The hydrogel exhibited reversible Fe 3+ -responsive fluorescence switching and pronounced differential swelling/deformation responses to pH 8 stimulation. Fe 3+ was used for the first information encryption input. Subsequently, exposure to Ca 2+ or alkaline conditions (pH 8) induces a shape deformation that enables secondary information encryption. This strategy establishes a new paradigm for utilizing ACQ fluorophores in functional hydrogels, promoting the development of more ACQ-based fluorescent hydrogels for anti-counterfeiting and secure data storage applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
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2018
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IF 2.701
Xue-Qin Zhang,Sheng-Xian Li,Zeng-Ping Chen,Yao Chen,Ru-Qin Yu
Due to the practical impossibility in controlling the number and distribution of "hot spots" on or close to the surfaces of enhancing substrates, internal standards are generally used to improve the accuracy and precision of quantitative surface-enhanced Raman spectroscopy (SERS). Traditional internal standard methods based on either univariate ratiometric models or conventional multivariate calibration models can use the information of only one characteristic SERS peak of only one internal standard, which weakens the efficiency of traditional internal standard methods in improving the quantitative results of SERS assays. In this contribution, the concept of using multiple internal standards was introduced for the first time to quantitative SERS assays by incorporating a unique spectral shape deformation (SSD) quantitative theory with multiple-internal-standard embedded core-shell nanoparticles . The quantification of phosmet residues on apple skins by SERS technique with Au-core/Ag-shell nanoparticles embedded with both 2-MB and PATP as enhancing substrate was used to illustrate the applicability of the proposed strategy. Experimental results demonstrated that the proposed multiple-internal-standard strategy based on SSD achieved much more accurate and precise concentration predictions for phosmet residues on apple skin than traditional single-internal-standard methods based on either univariate ratiometric calibration models or conventional multivariate calibration models. The SERS quantitative results of the multiple-internal-standard strategy were comparable to those obtained by LC-MS/MS. The average relative deviation between the quantitative results of the proposed method and those of ICP-MS was about 8%. The good accuracy of the proposed method makes it a promising alternative for quantitative SERS assays.
研究领域:
分析化学
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食品科学
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纳米技术
✓ 已验证
DOI
高影响因子
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
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2025
·
IF 0
Jiayu Tian,Chenzhe Li,Ying Zhao
Three-dimensional (3D) soft actuators capable of 3D-to-3D shape morphing have garnered significant research interest. However, realizing multifunctional capabilities remains challenging, as most existing designs are limited to transformations between geometrically similar 3D shapes. To address this limitation, this article presents the design and fabrication of a 3D soft actuator capable of morphing between geometrically dissimilar 3D shapes. The actuator features a bilayer structure fabricated by bonding a liquid crystal elastomer (LCE) layer onto a pre-stretched elastomer substrate. Independent control over the substrate’s pre-stretch direction and the LCE’s alignment direction enables programmable 3D-to-3D shape transformations between dissimilar modes, such as bending-to-twisting or twisting-to-bending. The practical utility of morphing between dissimilar shapes is demonstrated via two applications: a multifunctional 3D gripper performing both grasping and winding, and a soft actuator facilitating directional object manipulation. This work overcomes the restriction of similar deformation modes inherent in many existing actuators, offering enhanced design flexibility for tailoring initial and actuated configurations to specific application requirements.
研究领域:
软体机器人
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智能材料
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执行器技术
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形状变形
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材料科学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Shan Ye,Wenjing Ma,Guodong Fu
Stimulus-responsive anisotropic hydrogels have attracted tremendous attention in the fields of actuators, soft robots, and artificial muscles due to their ability to perform complex programmable motions. However, it is still challenging to construct anisotropic hydrogels via a simple way without the assistance of external fields. Inspired by gradient dissolved oxygen in seawater, we proposed a novel simple structure programming strategy to prepare anisotropic hydrogels using low-cost natural oxygen as the driving force. Encouragingly, this strategy, which relied on the asymmetric inhibitory behavior of natural gradient dissolved oxygen toward radical polymerization and electrostatic attraction between polyelectrolyte chains, enabled the obtained anisotropic hydrogels with both gradient structure and phase-separated structure. It is found that this complex asymmetric structure allowed anisotropic hydrogels be capable of complex deformations under different environmental conditions (temperature, pH), such as blooming and wilting flower shapes. Additionally, a humidity alarm and a four-armed hydrogel gripper were successfully constructed based on the designed anisotropic hydrogel, which indicated that our work provides a new strategy for the field of smart actuator fabrication.
研究领域:
材料科学
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软体机器人学
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执行器工程
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聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Zhiming Hou,Xinyu Ren,Zhuangzhuang Sun,Ruoqi An,Mingzhi Huang,Cen Gao,Mengying Yin,Guangxiu Liu,Dengqi He,Hongliang Du,Rongbing Tang
Bacteria-derived hydrogen sulfide (H 2 S) often contributes to the emergence of antibiotic-recalcitrant bacteria, especially persister (a sub-population of dormant bacteria), thus causing the treatment failure of Catheter-associated urinary tract infection (CAUTI). Here, an H 2 S harvester nanosystem to prevent the generation of persister bacteria and disrupt the dense biofilm matrix by the self-adaptive ability of shape-morphing is prepared. The nanosystem possesses a core-shell structure that is composed of liquid metal nanoparticle (LM NP), AgNPs, and immobilized urease. The nanosystem decomposes urea contained in urine to generate ammonia for eliminating bacteria-derived H 2 S. Depending on the oxidative layer of liquid metal, the nanosystem also constitutes a long-lasting reservoir for temporarily storing bacteria-derived H 2 S, when urease transiently overloads or in the absence of urine in a catheter. Depriving H 2 S can prevent the emergence of persistent bacteria, enhancing the bacteria-killing efficiency of Ga 3+ and Ag + ions. Even when the biofilm has formed, the urine flow provides heat to trigger shape morphing of the LM NP, tearing the biofilm matrix. Collectively, this strategy can turn trash (urea) into treasure (H 2 S scavengers and biofilm rippers), and provides a new direction for the antibacterial materials application in the medical field.
研究领域:
纳米技术
·
生物医学工程
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材料科学
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微生物学
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传染病学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Yi Wu,Ying Han,Zhuxuan Wei,Yu Xie,Jun Yin,Jin Qian
The rational design of mechanical metamaterials endows them with unusual properties inaccessible by conventional materials. In this study, compression–twist coupling building blocks with embedded chirality are fabricated by multimaterial 4D printing of shape memory polymers. Each chiral unit can be programmed individually by mechanical compression at a selected high temperature, whose temporary shape is self-maintained at the reduced temperature when the load is removed. With these building blocks, lattice-like architectures can be constructed in planar and layer-to-layer assemblies. Such modular design overcomes the limitation of conventional material arrangement by allowing on-demand re-programmability of chirality-defined structural heterogeneity. Using this strategy, metamaterials with tunable Poisson's ratio and shape-morphing metastructures are developed by harnessing the cooperative deformation of spatially heterogenous tessellation that undergoes local shrinkage or expansion, depending on the encoded Poisson response. An untethered multimodal soft gripper is assembled by chiral metastructures with distinct morphing modes, capable of unscrewing up a bottle cap attributed by the programmed functionality at module-level. The present modular chiral metamaterials with embedded chirality and flexible deployability may promote the applications of mechanical metamaterials in active shape-morphing structures and functional soft machines.
研究领域:
材料科学
·
机械工程
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增材制造
·
智能材料
✓ 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）