CELLULOSE
·
2024
·Vol. 31
·期 6
·3805-3819
·
IF 4.9
Cao Hui,Cheng Zhenyu,Liu Jianan,Zhao Zhenzhen,Zhang Jincheng,Dai Manman,Cheng Lu,Wang Ying,Xia Xin,Ke Huizhen,Zhou Huimin
Flexible intelligent response devices are fabricated using several matrix materials. Among these, bacterial cellulose (BC) exhibits higher crystalline characteristics along with a higher degree of polymerization, elastic modulus, tensile strength, and water absorption. In this study, to further increase the response of fiber-based materials and expand their wearable applications, BC-based Janus fibers are prepared via wet spinning and used as fibrous intelligent response materials driven under photothermal stimulation. The BC-based Janus fibers exhibited excellent photothermal response with hydrophilic graphene oxide (GO)/BC as the actuation layer and hydrophobic graphene/BC as the supporting layer. When an infrared light was used to stimulate the GO side, the resulting dehydration and contraction of the GO side drove deformation. When the infrared stimulus was removed, the BC and GO quickly absorbed water and expanded owing to their favorable water-absorption properties. The material recovered its original straight shape, achieving reversible deformation. The experiment showed that the fibers prepared with 35 wt% GO and 100 wt% graphene exhibited a superior photothermal actuation performance compared to the BC fibers, GO/BC fibers, and graphene/BC fibers. When the actuation layer was exposed to infrared light for 27 s, the fibers started to bend upward along the illuminated section. After 55 s of exposure, the bending angle reached 135°. After the infrared light was turned off, the bent fibers returned to their original straight shape.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Soft Robotics
·
2025
·
IF 6.1
Chenlong Tang,Hui Ma,Shiyu Wu,Hui Zhang,Wenquan Chen,Yang Zhou,Kun Wei,Xiaojian Li,Fuzhou Niu,Ping Liu,Yuping Duan,Guangli Liu,Tingting Luo,Runhuai Yang
Programmable deformation hydrogel robots have garnered significant attention in biomedical fields due to their ability to undergo large-scale reversible deformation. As clinical demand rises, there is a need for hydrogel robots that are easy to process and operate, and can undergo programmable deformation. Here, we propose a method to fabricate single-layer programmable deformation hydrogel robots in one step using a high-precision digital light processing 3D printing system. Two kinds of deformable elements with different structure distribution on the top and bottom sides are produced by using two kinds of focused light with varying intensities. By combining these deformable elements, we create four basic modules with different and fixed deformable shapes. The desired shape deformation in hydrogel robots can be achieved by programming the combination of these four basic modules. The hydrogel robots exhibit reversible repeat deformation under near-infrared light stimulation. We validate our approach by fabricating several scaffolds using combinations of the four basic modules, demonstrating the feasibility of programming deformation and the potential application of these scaffolds in pipeline movement. This research provides the feasibility for the simple programming deformation of hydrogel robots and offers a novel approach for fabricating programmable deformation hydrogel robots in biomedical fields.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Kai Gou,Lei Wang,Minghui Wei,Jingtao Jiang,Gengsheng Weng
Morphing a two-dimensional (2D) plate into customized three-dimensional (3D) structures with complex curvatures is of great importance for developing the next generation of soft robotics, flexible devices, and sensors. Yet, the practical application of shape-morphing materials remains challenging due to the material’s inhomogeneous or discontinuous design. Herein, we demonstrate a biomorphogenesis-inspired paradigm that utilizes the ultraviolet mapping-based thickness gradient (UVM-TG) design for the shape transformation of bilayer-structured polymer sheets composed of a hydrogel layer and a hydrophobic polymer layer. The hydrophobic polymer layer as the passive layer is laser-engraved to create the thickness gradient distribution, which programs the dehydrative-shrinking-driven 3D shape transformation of the bilayer polymer sheets to deform into 3D structures with complex Gaussian curvatures, e.g., gourd and roadster. These 3D structures without uncontrollable surface buckling and wrinkles during those nonzero Gaussian curvature shape transformations exhibit reversible shaping/flattening switchability. Our UVM-TG design strategy, which does not require the inhomogeneous or discontinuous design of shape-morphing materials, establishes a facile strategy for fabricating shape-morphing materials.
研究领域:
材料科学
·
生物启发工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fan Bu,Zhengyan Zhang,Hanbin Xiao,E Cheng,Feng Zhu
Intelligent artificial muscle systems that adapt to changing environments and load demands can be used in a wide range of smart soft robots, muscle function restoration, and human–machine interactions. However, it is still a challenge for artificial muscle fiber to satisfy large reversible deformations and high load capacity. Here, a bioinspired novel artificial muscle system based on GLC fiber (graphene@liquid crystal elastomer/carbonyl iron particle) is designed that allows for large reversible deformation, continuously adjustable stiffness and dynamic self-adaption. The system exhibits multidimensional modulus enhancement (axial tension, axial compression and shear modulus) under an adjustable magnetic field, which significantly enhances the stability and load capacity (2000 times its own weight). While the system also demonstrated large deformation (41.5 %) and high reliability (1000 cycles) without magnetic field. Furthermore, a self-sensing mechanism based on surface-warped graphene is established, and the dynamic self-adaptive ability of perception-judge-drive of artificial muscle system is realized. Finally, as a proof-of-concept, the self-adaptive robotic arm and self-adaptive linear motor are prepared to exhibit the stability and accuracy of artificial muscle system.
研究领域:
生物医学工程
·
材料科学
·
机器人学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Junping Lv,Lin Zhu,Meng Zhang,Zexu Zhao,Shu-Wei Chen,Jinyi Wang
Actuators with controllable and reversible morphing towards environment stimuli have great potential applications in diverse fields. In spite of good progress made over the past decades, simple and efficient preparation of multi-response actuators is still a challenge. Here, we report a strategy to prepare humidity and near infrared (NIR) dual-response actuators with controllable and reversible bending or twisting deformation. The actuators were made up of two layers, one was polyvinyl butyral (PVB) layer with humidity and NIR inertness, and the other was chlorine-modified polypyrrole (PPy-Cl) doped poly(N-isopropylacrylamide-co-benzophenone) (PNIPAM-ABP) composite layer, taking advantage of the NIR photothermal conversion capability of PPy-Cl, along with the thermal-responsive PNIPAM-ABP. Upon NIR light irradiation , PPy-Cl converted light energy into heat, which subsequently induced the shrinkage of poly(N-isopropylacrylamide) (PNIPAM) chains; upon a high-humidity environment, PPy-Cl absorbed water molecular and transferred it into PNIPAM polymer , which further caused the bilayer to shrink or swell in an asymmetric manner, consequently leading to reversible bending or unbending behaviors. Interestingly, upon ultraviolet (UV) light irradiation with a grid photomask, the bilayer actuators showed bending or twist behaviors along with a special direction. The bionic flowers made from the actuators could imitate sunflower's opening and closing behaviors in response to NIR or humidity. The dual-response actuator could also imitate the lifting weight behaviors of forklifts. As an interesting example for potential utilization, a smart four-wheel vehicle was constructed using the bilayer actuator, showed excellent fast-moving performance.
研究领域:
材料科学
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 44
·18800-18807
·
IF 7.76
Zhouyue Lei,Wencheng Zhu,Shengtong Sun,Peiyi Wu
A facile approach has been developed to prepare well-designed MoS2-based flexible anisotropic actuators with tunable thermo- and photo-responses, in which MoS2 nanosheets act as the photothermal transduction agents and enable remote and precise control of the actuator locomotion. Taking advantage of the dual-responsive behaviors, programmable locomotion, reversible deformation, good mechanical properties and biocompatibility, the MoS2-based flexible anisotropic actuators are very promising in soft robotics for future intelligent applications.
研究领域:
材料科学
·
机器人技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Tianjiao Wang,Jun Zhao,Chuanxin Weng,Tong Wang,Yayun Liu,Zhipeng Han,Zhong Zhang
In this work, a simple method is proposed for the preparation of bidirectionally reversible light-responsive shape memory polyurethane (SMPU) bilayer. This SMPU bilayer consists of a 4,4-azodibenzoic acid (Azoa) containing SMPU (SMPU-Azoa) layer and a carbon black (CB) containing SMPU (SMPU-CB) layer. A reversible deformation is realized when the two sides are exposed to ultraviolet (UV) and infrared (IR) lights, respectively. The working mechanism is the trans – cis isomerization of SMPU-Azoa layer and the photo-thermal effect of SMPU-CB layer. The effect of the filler content and the thickness ratio of bilayer is systematically studied. The reversible bending angle of the SMPU bilayer can exceed 30° in 16 s for one cycle when the Azoa and CB contents are 5 wt% and 0.5 wt%, respectively, and the thickness ratio of SMPU-Azoa layer to SMPU-CB layer is 1/1.3. Furthermore, a micro-robot based on such LSMP bilayer is demonstrated.
研究领域:
材料科学
·
高分子科学
·
光电技术
·
机器人技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 34
·2204039
·
IF 32.086
Chao Li,Xiangxiang Zhang,Boyu Yang,Feng Wei,Yongshuo Ren,Wei Mu,Xiaojun Han
The use of artificial cells to mimic living tissues is beneficial for understanding the mechanism of interaction among cells. Artificial cells hold immense potential in the field of tissue engineering. Self-powered artificial cells capable of reversible deformation are developed by encapsulating living mitochondria, actins, and methylcellulose. Upon addition of pyruvate molecules, the mitochondria produce adenosine triphosphate (ATP), which acts as an energy source to trigger actin polymerization. The reversible deformation of artificial cells occurs with a spindle shape resulting from the polymerization of actins to form filaments adjacent to the lipid bilayer that subsequently returns to a spherical shape resulting from the depolymerization of actin filaments upon laser irradiation. The linear colonies composed of these artificial cells exhibit collective contraction and relaxation to mimic muscle tissues. At maximum contraction, the long axis of each giant unilamellar vesicle (GUV) is parallel to each other. All the colonies are synchronized in the contraction phase. The deformation of each GUV in the colonies is influenced by its adjacent GUVs. The muscle-like artificial cell colonies described here pave the way to develop sustainably self-powered artificial tissues.
研究领域:
生物物理学
·
组织工程
·
细胞生物学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
iScience
·
2023
·
IF 5.8
Xu Dong,Xiaoshuang Zhou,Lvzhou Li,Xiaoting Cao,Jiawei Xu,Shengping Dai,Yaoyao Jiang,Qingyue Li,Ningyi Yuan,Jianning Ding
Monodomain liquid crystal elastomers (m-LCEs) exhibit large reversible deformations when subjected to light and heat stimuli. Herein, we developed a new method for the large-scale continuous preparation of m-LCE fibers. These m-LCE fibers exhibit a reversible contraction ratio of 55.6%, breaking strength of 162 MPa (withstanding a load of 1 million times its weight), and maximum output power density of 1250 J/kg, surpassing those of previously reported m-LCEs. These excellent mechanical properties are mainly attributed to the formation of a homogeneous molecular network. Furthermore, the fabrication of m-LCEs with permanent plasticity using m-LCEs with impermanent instability without external intervention was realized by the synergistic effects of the self-restraint of mesogens and the prolonged relaxation process of LCEs. The designed LCE fibers, which are similar to biological muscle fibers and can be easily integrated, exhibit broad application prospects in artificial muscles, soft robots, and micromechanical systems.
研究领域:
材料科学
·
机械工程
·
仿生学
✓ 已验证
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2024
·
IF 14.4
Boyu Yang,Chao Li,Yongshuo Ren,Weichen Wang,Xiangxiang Zhang,Xiaojun Han
The bottom-up construction of artificial cells is beneficial for understanding cell working mechanisms. The glycolysis metabolism mimicry inside artificial cells is challenging. Herein, the glycolytic pathway (Entner–Doudoroff pathway in archaea) is reconstituted inside artificial cells. The glycolytic pathway comprising glucose dehydrogenase (GDH), gluconate dehydratase (GAD), and 2-keto-3-deoxygluconate aldolase (KDGA) converts glucose molecules to pyruvate molecules. Inside artificial cells, pyruvate molecules are further converted into alanine with the help of alanine dehydrogenase (AlaDH) to build a metabolic pathway for synthesizing amino acid. On the other hand, the pyruvate molecules from glycolysis stimulate the living mitochondria to produce ATP inside artificial cells, which further trigger actin monomers to polymerize to form actin filaments. With the addition of methylcellulose inside the artificial cell, the actin filaments form adjacent to the inner lipid bilayer, deforming the artificial cell from a spherical shape to a spindle shape. The spindle-shaped artificial cell reverses to a spherical shape by depolymerizing the actin filament upon laser irradiation. The glycolytic pathway and its further extension to produce amino acids (or ATP) inside artificial cells pave the path to build functional artificial cells with more complicated metabolic pathways.
研究领域:
合成生物学
·
代谢工程
·
细胞生物学
·
生物物理学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
·
2023
·
IF 4.7
Zizhuo Zhai,Xipeng Dong,Hongxia Qi,Ranting Tao,Pudun Zhang
The fluorescence of carbon quantum dots (CQDs) has been paid a lot of attention, but its photothermal performance attracts less attention since preparing CQDs with high photothermal conversion efficiency (PCE) is a big challenge. In this work, CQDs with an average size of 2.3 nm and a PCE of up to 59.4% under 650 nm laser irradiation were synthesized by a simple one-pot microwave-assisted solvothermal method using citric acid (CA) and urea (UR) as the precursors and N,N-dimethylformamide as the solvent under an optimized condition (CA/UR = 1/7, 150 °C, and 1 h). The as-prepared CQDs were demonstrated to have unique surface chemical states; i.e., abundant pyrrole, amide, carboxyl, and hydroxyl groups were found on the surfaces of CQDs, which ensure a high PCE. These CQDs were introduced into a thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) to form a CQDs@PNIPAM nanocomposite, and then, a bilayer hydrogel composed of CQDs@PNIPAM and polyacrylamide (PAM) was fabricated. The bilayer hydrogel can be reversibly deformed just by a light switching on/off operation. Based on the excellent photothermal performance, the developed CQDs are expected to be used in photothermal therapy, photoacoustic imaging, and other biomedical fields, and the CQDs@PNIPAM hydrogel nanocomposite is promising to be applied in intelligent device systems as a light-driven smart flexible material.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
智能材料
✓ 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）