Advanced Intelligent Systems
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2021
·Vol. 3
·期 10
·2000232
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IF 0
Qianying Chen,Tian-Yun Huang,Pengyu Lv,Jianyong Huang,Huiling Duan
Intelligent micromachines that perform tasks in complex microenvironments by adjusting structural configurations and physical properties offer substantial potential for use in many fields, including precision medicine, microfluidic channels, micromanipulations, and bioengineering. Recent progress in smart materials and 4D microprinting provides a feasible strategy for fabricating compound micromachines by designing and assembling predictable 3D-to-3D shape-morphing components. However, shape transformations of these components can only be triggered simultaneously by external stimuli, and orderly triggering among them cannot be achieved yet for an intended purpose of performing more efficient actions. Herein, a novel sequentially triggered strategy is proposed for developing intelligent micromachines that consist of multiple reconfigurable components that work interactively with each other. Furthermore, self-locking micromachines with tunable coupling mechanisms that coordinate accurate time-sequence deformations among components are achieved. Three types of locking couplings are modulated based on finite-element analysis (FEA)-aided design. The proposed method provides an effective strategy to create next-generation intelligent micromachines that can change their shapes to adapt to complex situations and complete multiple tasks.
研究领域:
生物工程
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精密医学
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微流控技术
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产品关联
DOI
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zuxiang Xu,Jun Fu
Precise and programmable control of reversible deformations of hydrogels has important implications for bionics. This work reports on programmable three-dimensional (3D) deformations and thermoresponsive actuation of polymer hydrogels in a well-defined manner. Precise infiltration of Fe3+ with periodic patterns is additionally used to cross-link the local polymer network through ionoprinting with a patterned electrode array. The patterned Fe3+ cross-linking generates periodic undulations in cross-link density, stiffness, and thermoresponsiveness. The internal stress induces 3D helical structures with tunable chirality and dimensions. The differential thermoresponsiveness imbues a fourth dimension to the shape deformations. Moreover, sequential ionoprinting generates well-defined in-plane periodic distributions of differential modulus and responsiveness, leading to 3D/4D umbrella-like origami upon temperature triggers.
研究领域:
材料科学
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生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Ruofei Wang,Lin Cheng,Chengnan Qian,Huaping Wu,Aiping Liu
Smart hydrogel materials have demonstrated significant advantages in application fields, such as drug delivery, tissue engineering, and smart sensing. However, developing a stimuli-responsive hydrogel that is simple to prepare, programmable, and capable of rapid response remains a challenge. Herein, we employed a polyvinyl alcohol (PVA) polymer film to hydrolyze and diffuse in a hydrogel monomer precursor solution, thereby constructing a diffusion layer and preparing an anisotropic hydrogel with a multiphase gradient structure. The diffusion-generated gradient structure creates a significant structural difference between the diffused and nondiffused layers similar to that of a bilayer structure, which leads to a significant difference in internal stress between the two layers, thus providing the hydrogel with a fast response capability (bending deformation of 527.3° in 30 s) while avoiding the interfacial confinement caused by the bilayer structure. In addition, the abundant hydroxyl groups of PVA, forming hydrogen bonding interactions with the amide groups of Poly(N-isopropylacrylamide) (PNIPAM), significantly enhance the mechanical properties of the gradient hydrogel. This enhancement is evidenced by an increase in tensile stress from 32 to 176 kPa and an increase in Young’s modulus from 2.23 to 44.19 kPa. It is important to emphasize that by designing the shape of the PVA film, precise multidimensional programmable deformation can be achieved. This simple yet versatile diffusion-driven strategy offers a practical approach to the design of responsive hydrogels, potentially paving the way for future advancements in intelligent actuators, artificial muscles, and intelligent human-machine technologies.
研究领域:
材料科学
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生物医学工程
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智能材料
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 6
·2207209
·
IF 19.924
Lianzhen Li,Ziqiang Shang,Jianfu Tang,Jiameng Li,Zefang Xiao,Yanjun Xie,Jiuqing Liu,Zhenjie Li,Shilong Yang,Yiqi Liu,Wentao Gan
The development of environmentally-friendly stimuli-responsive materials is vital to green electronics, sensors, and biomedicine. However, fast responsiveness and precise locomotion control of biomass materials have not been accomplished. Herein, a magnetically responsive wood is reported that can achieve programmable locomotion in the rotating magnetic field. The magnetized wood is fabricated by removing lignin from the cell walls, which produces a porous microstructure, enabling facile and stable combination between NdFeB and wood. With the directional arrangement of magnetic moments after magnetization, the magnetized wood with obviously positive and negative magnetic poles is magnetic stability, and can complete various movements including spatial flipping, bypass obstacles, climb up, and down under the driven by magnetic torques. Meanwhile, the magnetized wood is lightweight (0.26 g cm −3 ), showing a fast walking speed of up to 11.3 mm s −1 under magnetic actuation (10 mT and 0.6 Hz), which is greater than those of petroleum-based polymeric materials. Benefitting from the unique porous structure, the magnetized wood can be used as the drug-carrier to deliver and release nano-cargoes effectively. This approach expands the range of stimuli-responsive materials beyond hydrogel, elastomers, and synthetic polymer, inspiring the creation of next-generation intelligent robots based on biocompatible and sustainable biomass materials.
研究领域:
材料科学
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生物医学工程
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绿色电子学
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2021
·Vol. 5
·期 1
·195-208
·
IF 5.693
Luo Xin,Lai Hua,Cheng Zhongjun,Liu Pengchang,Li Yufen,Liu Yuyan
Smart slippery surfaces with intelligent liquid droplet manipulation performance have aroused much attention. The lubricant and surface microstructure are two key factors that govern the droplet’s sliding performance. However, for almost all existing surfaces, only one factor can be regulated, which significantly limits their wetting performances and applications. Herein, by integrating the temperature-responsive lubricant and shape memory surface microstructure, we report a novel slippery surface. On this surface, the solid/liquid phase transition of the lubricant provides the surface with the ON/OFF control for droplet’s movement between the sliding state and pinning state, and the tunable surface microstructure based on material’s shape memory effect offers the programmable sliding directions. Due to the combined effect, diverse liquid transportation programs with random ON/OFF manner and arbitrary direction were further demonstrated on this surface. This work advances a new slippery surface with controllable lubricant and surface microstructure, which not only provides insights into the design for smart slippery surfaces but also provides a promising material for application in smart control of droplet motion. Graphical abstract
A novel shape memory slippery surface is prepared, on which both the lubricant and surface microstructure can be reversibly controlled.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Yiding Zhong,Wei Tang,Chao Zhang,Zhongdong Jiao,Dongming Wu,Weiting Liu,Huayong Yang,Jun Zou
Soft robots have unique advantages in the fields including human-machine interaction and bionics, yet there remain persistent challenges in developing multifunctional, programmable, and high-performance soft actuators. Here, we introduce a class of programmable thermochromic soft actuators (PTSAs) through liquid–vapor phase transitions, which can deform greatly through extreme volume change accompanying reversible liquid-vapor phase transition of embedded low boiling point fluid, and change several colors through reversible reactions of embedded thermochromic microcapsules. Using a "two dimensional" architecture, the initial shape and deformation type of the actuator with three different modes can be easily programmed. Respond to multiple stimuli, PTSAs have a variety of optional actuating methods including external heating, Joule heating, magnetic induction heating, and magnetic actuating. The suitable operating temperature and stretchability allows PTSAs to be used in wearable devices . Using PTSAs, a range of applications including color-shifting curly biomimetic maple leaves, color-shifting twisting biomimetic vines, zero-power holding and visually temperature sensing soft grippers, untethered magnetically actuated camouflage soft robots, and blood pressure sensing wristband are demonstrated, illustrating their broad prospects for applications in soft robotics, wearable devices, camouflage, and bionics.
研究领域:
软体机器人
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材料科学
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仿生学
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可穿戴设备
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
·
2020
·Vol. 6
·期 5
·
IF 13.117
Shuyun Zhuo,Ziguang Zhao,Zhexin Xie,Yufei Hao,Yichao Xu,Tianyi Zhao,Huanjun Li,Elias M. Knubben,Li Wen,Lei Jiang,Mingjie Liu
Many biological organisms can tune their mechanical properties to adapt to environments in multistable modes, but the current synthetic materials, with bistable states, have a limited ability to alter mechanical stiffness. Here, we constructed programmable organohydrogels with multistable mechanical states by an on-demand modular assembly of noneutectic phase transition components inside microrganogel inclusions. The resultant multiphase organohydrogel exhibits precisely controllable thermo-induced stepwise switching (i.e., triple, quadruple, and quintuple switching) mechanics and a self-healing property. The organohydrogel was introduced into the design of soft-matter machines, yielding a soft gripper with adaptive grasping through stiffness matching with various objects under pneumatic-thermal hybrid actuation. Meanwhile, a programmable adhesion of octopus-inspired robotic tentacles on a wide range of surface morphologies was realized. These results demonstrated the applicability of these organohydrogels in lifelike soft robotics in unconstructed and human body environments.
研究领域:
材料科学
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软体机器人
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高分子化学
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仿生学
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机械工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yan Jiang,Mengmeng Yang,Liyun Cheng,Lu Xiao,Xinyi Wang,Ruixuan Liu,Yiyan Wu,Shuangfei Wang,Xiuyu Liu
The integration of lignocellulosic nanomaterials into energy management applications possesses enormous technical appeals catering to high-tech and low-carbon era. Nature has designed hierarchical and heterogeneous lignocellulose microstructure, which can be harnessed for desirable dielectric behaviors towards specific applications. Here, we make the first attempt to boost the tribopositivity of 2D self-assembly (i.e., nanopaper) of cellulose nanofibrils by leveraging the inherent functionality of their hemicellulose phase. In comparison to conventional nanopapers assembled from TEMPO-oxidized/enzymatic cellulose nanofibrils with significantly lower hemicellulose content (4.6/12.2 vs. 20.3 wt%), the as-prepared hemicellulose-rich nanopaper exhibits ~2-fold higher electron-donating capability, which in turn generates ~1.5-fold higher triboelectric nanogenerator (TENG) output when paired with given tribonegative materials. We provide multiscale insights into the boosted tribopositivity of nanopaper by hemicellulose phase arising from its unique molecular structure and micro-distribution pattern. Furthermore, amorphous hemicellulose phase can be readily molecularly designed, e.g., aminosilanization, which further enhances the tribopositivity of nanopaper towards self-powered applications requiring high energy density. Besides, the hemicellulose-rich nanopaper is highly writable, mechanically strong, and optically transparent, serving as a desired structural material with favorable programmability for various TENG-based sensing, encryption and wearable devices.
研究领域:
材料科学
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生物基材料
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能源技术
✓ 已验证
DOI
高影响因子
Chem
·
2023
·
IF 23.5
Qiuyi Huang,Xiaoxian Chen,Wenlang Li,Zhiyong Yang,Yi Zhang,Juan Zhao,Zhenguo Chi
Flexible hydrogen-bonded organic frameworks (FHOFs) have attracted great attention due to their unique dynamics and versatile applications; however, designing FHOFs remains a challenge. Herein, we report the first example of a flexible HOF (named 8PZ) with local dynamics for adaptive guest accommodation through incorporating soft ethyl-ester chains. Single-crystal X-ray diffraction (SXRD) analyses reveal that, in response to various external stimuli, local motions of ethyl-ester chains occur with unaltered molecular assembling forms of 8PZ, which can efficiently regulate pore sizes but allow for stable luminescence performances. 8PZ can adapt to a series of 3-alkylthiophenes with large-scale alkyl-chain-length variation through its local dynamics. Host-guest cocrystals amenable to SXRD analyses are produced, which present programmable temperature-dependent luminescence behaviors and show potential for various crucial applications. This work provides a promising avenue to engineer future multifunctional HOFs, thus enriching the types and applications of existing porous materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ruyuan Dai,Guoqiang Li,Lin Xiao,Yaoxia Li,Zehang Cui,Long Jia,Maolin Zhou,Yuegan Song,Yi Yang,Yong Cai,Changfeng Chen,Kai Yin
Self-propelled autonomous devices have great significance in energy, environment, and biomedical engineering, and thus vast achievements have been made in recent years. However, conventional propulsion often requires special chemicals or external energy, limiting their practical applications due to environmental pollution and energy waste. In this work, inspired by the character of a water strider on the water surface, a novel droplet-driven micro-surfboard (DDMS) is developed via femtosecond laser micro/nano fabrication, which can be driven in a green and controllable way. The DDMS is composed of a superhydrophobic sheet with superhydrophilic wedgy grooves. The droplet is put on superhydrophilic wedgy grooves to enter the water and form a jet, which further facilitates the directional motion of the DDMS. Also, a type of actuator with three superhydrophilic wedgy grooves is designed successively to achieve turn direction, which completes the programable motion by adding droplets to the three channels. Finally, an actuator with circular water storage area and a symmetrical vane-like rotating device with two superhydrophilic channels are developed, realizing long-distance and rotational motions. This work provides new insights into pollution-free autonomous devices and shows the great potential of droplet-driven autonomous devices in the fields of micromechanics and intelligent systems.
研究领域:
微纳米技术
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生物医学工程
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ting Zhao,Yu Tan,Yitan Li,Xu Wang
Hypothesis Hydrogel actuators powered by chemical fuels are pivotal in autonomous soft robotics. Nevertheless, chemical waste accumulation caused by chemical fuels hampers the development of programmable and reusable hydrogel actuating systems. We propose the concept of ionic fuel-powered soft robotics which are constructed by programmable salt-responsive actuators and use waste-free ionic fuels. Experiments Herein, soft hydrogel actuators were developed by orchestrating the Janus bilayer hydrogels’ capacity for swelling and shrinking. Decomposable and easily removable ionic fuels were applied to power the actuators. Swelling tests were used to evaluate the deformability of the hydrogels. Tensile tests were performed to investigate the modulus of the hydrogels. The bonded interface composed of the interpenetrating polymer chains from both hydrogel layers bilayer was evidenced by the optical microscopy and scanning electron microscopy. The ionic conductivities of solutions were determined by a conductivity meter. Furthermore, a range of biomimetic soft robots with various shapes and asymmetrical structures have been designed and fabricated to execute complex functions. Findings The programmable actuators powered by ionic fuel exhibit adjustable bending orientations, amplitudes, and durations, along with consistent cyclic actuations enabled by replenishment of the fuel without noticeable loss in performance. Many life-like programmable soft robotic systems were designed, indicating spatiotemporally controllable functions.
研究领域:
材料科学
·
软体机器人学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xueqi Li,Ziqiang Shang,Yaoxing Wang,Jiuqing Liu,Yanjun Xie,Jian Li,Yiqi Liu,Wentao Gan
Magnetic soft robots composed of stimuli-responsive materials are promising for biomedical engineering applications; however, typical responsive materials are fabricated with nondegradable polymeric substrates. In this study, we report a flexible, biodegradable, and magnetically sensitive cellulose film (M-film) that can be utilized for magnetically controllable soft robots (M-robots) with programmable locomotion, cargo delivery, and remote wireless operation functions. The M-film with good foldability, origami, and magnetic properties is synthesized by a simple paper-making process using cellulose nanofibers, additive sodium alginate, and BaFe12O19 particles. Through the following origami–magnetization process, the M-robot with multimodal movements is designed: climbing over the obstacles in the walking environment; additionally, this process can complete various cargo transport tasks by clawing, rolling, and flipping. This approach expands the precise controllability and manipulability of environmentally friendly cellulose nanomaterials beyond the known applications and opens the prospects of their implementation in stimuli-responsive robots, wireless control electronics, and intelligent devices.
研究领域:
材料科学
·
生物医学工程
·
机器人学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）