ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jingliu Wang,Yue Wu,Kewei Zhao,Gaozheng Liu,Rongyan Wang,Yanyan Zhao,Yong Liu,Yaqing Ge,Xubao Jiang,Xiangling Gu
Poly(N-isopropylacrylamide) (PNIPAM)-based hydrogels are widely used in the preparation of Janus actuators due to their remarkable temperature-responsive properties. However, preparing PNIPAM-based hydrogel actuators with excellent mechanical properties, mass transfer ability, and programmable deformation, as well as gaining a profound and systematic understanding of their driving mechanisms, remains a challenge to date. To address these challenges, an efficient PNIPAM-hydroxypropylmethyl cellulose/polyacrylamide-Graphene oxide (PNIPAM-HPMC/PAM-GO) Janus hydrogel actuator with strong interfacial stability was constructed based on the self-generation method; PNIPAM-HPMC was used as the active layer, and PAM-GO was used as the passive layer. The introduction of HPMC makes the active layer have excellent tensile strength (7.55–28.3 kPa) and mass transfer ability (39.07–73.03%), thereby improving the deformation ability of the actuator (239–360°). It can still achieve a 360° deformation after being actuated repeatedly 5 times. The deformation dynamics of the Janus hydrogel actuator under thermal response conditions were quantitatively analyzed by real-time tracking of the response behavior, and the important role of mechanical moduli in the deformation process of the Janus hydrogel actuator was revealed for the first time. Therein, the effect of the elastic modulus difference on the deformation of the actuator is 48 times that of the compression modulus difference. Finally, the Janus hydrogel actuator with high interface stability, mechanical robustness, time-programmable, and double-layer integration prepared in this work shows potential application in the fields of bionics, intelligent switches, and display systems.
研究领域:
材料科学
·
生物工程
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
Additive Manufacturing
·
2024
·
IF 10.3
Jingang Wang,Yuzhao Zhang,Jianchen Zheng,Hongji Guo,Ye Qiu,Xiaoduo Wang,Lianqing Liu,Haibo Yu
It has been widely reported that untethered micro-robots can access hard-to-reach regions within the body to perform a range of medical procedures. However, the narrow operating space limits the ability of such micro-robots to interact with the external environment. Here, inspired by chameleons, we propose a prehensile micro-tentacle with wide-spectral deformability using the micro four-dimensional (4D)-printing technology. The design procedure includes programmable design material distribution and the integration of pH-responsive hydrogels and photoresists via the two-photon polymerization (TPP) process to build pH-responsive actuated joints . The resulting micro-tentacles were able to wrap objects located within a range of >12 times their own volume, wherein the theoretical size range of these entangled objects was found to range from 6.5 to 40 µm. Furthermore, we demonstrate the cell-capturing characteristics of micro-tentacles and confirm their ability to anchor onto specific objects. Such micro-tentacles with a large graspable space and an excellent shape adaptability could be easily integrated into untethered micro-robots in the future, paving the way for their medical application in complex biological environments.
研究领域:
生物医学工程
·
材料科学
·
微纳米技术
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 17
·e202200561
·
IF 4.839
Zhanxiang Zhang,Haocheng Wang,Hua Yang,Wenping Song,Lizhou Dai,Shimin Yu,Xuejia Liu,Tianlong Li
Graphical In this article, a reconfigurable and mobile magnetic microswarm as MRI contrast enhancer was investigated experimentally and numerically. By changing motion mode, it could adaptively navigate multiple terrains. Furthermore, we demonstrated this microswarm performed great enhancement of MRI imaging. This microswarm held great promise for highly sensitive and accurate intestinal MRI in the clinic. Highly effective contrast enhancer that processes targeting ability and maneuverability is in great demand in clinics for accurate diagnosis. Here a new strategy using deformable and manipulatable magnetic microswarm as MRI contrast enhancer is developed. Magnetic microswarm aggregated from nanoparticles is inherently deformable and they can be controlled with multiple programmable deform abilities. It is demonstrated that spatiotemporal programming magnetic field enables the magnetic microswarm not only to exhibit both ribbon-like and round-like behaviours but also to adaptively navigate multiple terrains. Intestinal model is conducted to explore the effect of magnetic microswarm as MRI enhancer, indicating the obvious enhancement of T 2 -weighted MRI sequences. This magnetic microswarm holds great promise for highly sensitive and accurate intestinal MRI in the clinic.
研究领域:
医学影像学
·
纳米医学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2019
·
IF 4.978
Hongbin Yang,Shuo Shao,Tongyu Zhu,Chao Chen,Shuren Liu,Bobo Zhou,Xiaoyu Hou,Yang Zhang,Wanli Kang
Low elastic polymer microsphere (L-EPM) has been proposed as a functional polymer microsphere these years. L-EMP has the excellent deformation ability in the porous medium due to the low storage modulus. Herein, one kind of L-EPM with storage modulus (G′) of 23.6 Pa was prepared by inverse suspension polymerization . The shear resistance of L-EPM was researched by using core flooding experiment and high shear rate emulsifier. The conformance control behavior of L-EPM was investigated by using double parallel sandpack flooding experiment. The results showed that L-EPM was a kind of swollen particle gel with three-dimensional net structure and contained amide, carboxyl, and sulfonate groups. The mechanism of water swelling property was mainly due to the formation of hydrogen bonds, hydrolysis of hydrophilic groups and the diffusion caused by osmotic pressure difference. Compared with high elastic polymer microspheres (H-EPM) and low elastic preformed particle gel (L-PPG), L-EPM had better shear resistance in the porous medium and the well casing perforation. In addition, the critical shear points of L-EPM was proposed in this work. Due to the better shear resistance and deformation ability, the conformance control behavior of L-EPM showed that L-EPM was a promising conformance control agent in the heterogeneous reservoirs.
研究领域:
石油工程
·
材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Xiaoyu Du,Fenghua Zhang,Likai Hu,Lan Luo,Zhengxian Liu,Yanju Liu,Jinsong Leng
Smart molds based on shape memory polymers (SMPs) with active deformation characteristics enable demolding of complex structures in response to external stimuli. However, for large-cavity components, smart molds made of common SMPs often have problems such as limited deformation and being prone to blowing during molding. Based on free radical polymerization, a rigid-flexible cross-linked network structure was constructed, achieving a large deformation up to 370 % for thermosetting shape memory styrene. On this basis, composites with nylon-spandex elastic fiber was prepared. The introduction of ± 45° laid elastic fibers hinders the crack propagation in the matrix and can improve the deformation capacity of the composites. Further, the programmable composites were applied to reusable shape memory smart molds, accomplishing shape convertion from 2D planes to 3D structures and 3D mandrels to 4D deformable components with variable cross-sections, curvatures, and structures, which is expected to pave a new way for smart molds.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
Smart Materials and Structures
·
2023
·Vol. 32
·期 6
·065014
·
IF 4.1
Tianjie Hou,Shufen Wang,Jianmin Li,Yu Wang,Yang Zhang,Lei Cao,Shixian Xiong,Lanlan Fan,Feng Gu
Intelligent actuators offer a lot of potential for use in soft robots, artificial muscles, sensors since it can alter shape in response to external stimuli. However, the stiffness of the material and the constrained specific surface area brought on by the dense stacking of materials restrict the response of the conventional humidity-responsive actuators. Herein, optimal humidity-responsive actuators of MXene were developed by designing topologies of heterostructured membrane of stacked nanosheets and 3D wrinkled MXene (3D-MXene). In this configuration, the stacked MXene nanosheets sustain the device's overall strength, while the 3D-MXene layer significantly improves the device's moisture absorption and decreases its stiffness. Importantly, the actuators have been strengthened due to the van der Waals forces at the interface of the stacked nanosheets and 3D-MXene. The fabricated MXene/3D-MXene actuator has exhibited remarkable response speed and deformation ability, obviously superior to any previously reported humidity-responsive actuators. By combining excellent electrical conductivity, the developed actuators demonstrated rapid response for electrical switches. This work highlights the significant potential for developing high performance responsive actuators by designing heterostructured configurations for applications in intelligent switches, soft robotics and synthetic muscles.
研究领域:
材料科学
·
智能设备
·
软机器人技术
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 12
·8454-8464
·
IF 5.2
Wei Qin,Yushan You,Yu Song,Jinrong Yin,Yang Zhou,Zhenyong Li,Zhen Zeng,Min Xu,Wenjiao Chen,Xianyan Ren
The polymer ultra-low-density proppants are critical to the development of slick-water fracture technology, but which were prone to obvious deformation under high pressure in the fractures. To increase the stiffness of the styrene-divinylbenzene copolymer (SDB) and obtain desired ultra-low-density (ULD) proppants, carbon dots (CDs) were introduced in-situ considering their characteristics as the zero-dimensional carbon nanomaterial. Taking the compressive strength and axial deflection, and so forth into consideration, the synthesis conditions of CDs modified SDB microspheres (CDs-SDBs) were optimized. Taking the graphite modified SDBs (MG-SDBs) as a reference, the density of CDs-SDBs did keep almost constant at about 1.1800 ~ 1.1899 g·cm −3 with the increase of CDs amount. The CDs-SDBs not only possess high-peak pressure (41.5 N) but also minute axial deflection (0.090 mm). The advantages of CDs-SDBs over MG-SDBs become even more pronounced under higher pressure, which can withstand closure pressure of 80 MPa with a small crush ratio of 4.47%. CDs-SDBs exhibit significant photoluminescence performances with maximum excitation and emission wavelengths of 634 nm and 554 nm. Highlights CDs-SDBs as ULD proppants with high strength and anti-deformation were developed. Advantages of CDs-SDBs become more pronounced under high-closure pressure. With increasing of CDs amount, apparent density of CDs-SDBs keep almost constant. Axial deflection of CDs-SDBs is only 0.09 mm under 41.5 N. The crush ratio is only 4.47% under 80 MPa closure pressure.
研究领域:
材料科学
·
石油工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Zhiwen Zheng,Shuaihua Zhang,Yiming Liu,Ziyu Han,Hang Qi,Xuexin Duan,Zhihong Zhang
The deformability and uptake capability of cells are critical indicators of their biomechanical properties and functional behaviors, particularly in tumor heterogeneity and cancer research. Here, we introduce a microfluidic flow cytometry platform integrated with a laterally adjustable squeezing structure for the characterization of bladder tumor cells (including 5637 and EJ cell lines) and uroepithelial cells (SV-HUC-1 cell line). The deformability of these cell types under varying channel width conditions was clearly assessed using this platform. The results demonstrated that tumor cells exhibited higher deformability compared to uroepithelial cells, with the EJ cell line exhibiting the greatest difference. Furthermore, the relationship between the malignancy, deformability, and uptake capability of bladder cells was explored through co-cultivation experiments with 2 μm particles. As the malignancy increased, the cells became more deformable and exhibited stronger phagocytic capability with particles. Subsequently, the heterogeneity of tumor cells was investigated by analyzing the deformability of phagocytic and non-phagocytic subpopulations within EJ cells. The developed microfluidic platform offers a promising high-throughput method to assess the biomechanical and phagocytic characteristics of cells, providing valuable insights into tumor cell biology, and potentially improving clinical status of urinary cytology examinations for bladder cancer.
CAS / MDL:
研究领域:
生物医学工程
·
癌症研究
·
细胞生物学
·
微流控技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2022
·Vol. 8
·期 13
·
IF 14.957
Shaolei Wang,Yuanyuan Nie,Hangyu Zhu,Yurui Xu,Shitai Cao,Jiaxue Zhang,Yanyan Li,Jianhui Wang,Xinghai Ning,Desheng Kong
Intrinsically stretchable electronics represent an attractive platform for next-generation implantable devices by reducing the mechanical mismatch and the immune responses with biological tissues. Despite extensive efforts, soft implantable electronic devices often exhibit an obvious trade-off between electronic performances and mechanical deformability because of limitations of commonly used compliant electronic materials. Here, we introduce a scalable approach to create intrinsically stretchable and implantable electronic devices featuring the deployment of liquid metal components for ultrahigh stretchability up to 400% tensile strain and excellent durability against repetitive deformations. The device architecture further shows long-term stability under physiological conditions, conformal attachments to internal organs, and low interfacial impedance. Successful electrophysiological mapping on rapidly beating hearts demonstrates the potential of intrinsically stretchable electronics for widespread applications in health monitoring, disease diagnosis, and medical therapies.
研究领域:
生物医学工程
·
材料科学
·
电子器件
·
生物电子学
·
医学诊断
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xingchao Li,Kai Hou,Yue Long,Kai Song
Liquid metal (LM)-based polymers have received growing interest for wearable health monitoring, electronic skins, and soft robotics. However, fabricating multifunctional LM-based polymers, in particular, featuring a convenient shaping ability while offering excellent deformability and conductivity remains a challenge. To overcome this obstacle, here, we propose a strategy to prepare LM-Gel “plasticine” (LGP) with great deformability, which is composed of a PVA (poly(vinyl alcohol)) soft network and an LM conductive phase. LGP can be easily constructed into different shapes such as plasticine and can be applied to different conditions (such as building a 3D circuit, circuit repair, and switch). Meanwhile, LGP has great conductivity (2.3 × 104 S/m) after surface annealing. Besides, LGP has a good electric heating performance, which shows the potential for application in wearable heating devices. Thus, this approach not only provides a way to prepare LM-polymer plasticine but also provides a novel perspective toward extending the applied range of LM-polymer composites.
研究领域:
材料科学
·
可穿戴技术
·
软体机器人
·
导电聚合物
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Jialin Zhuang,Lingchao Wang,Yingmo Hu,Yechen Wang,Liping Lin,Jiaying Xiao,Yunfan Chen,Xiaowei Li,Huiqiang Liu,Qian Zhang,Qi An
Photopiezocatalysts can take advantage of both solar light and environmental mechanical energy, holding high significance in building a sustainable society. However, designing high potent photopiezocatalysts remains challenging. In this study, we propose the asymmetric ternary heterojunction as an efficient strategy for achieving effective photopiezocatalysts. The BTO/PPy/TiO2 catalyst composed of BaTiO3 (BTO) and TiO2 nanosheets and polypyrrole (PPy) nanoparticles present both enhanced asymmetric interfacial charge separation as well as deformability under mechanical stimuli, leading to appealing photopiezocatalytic capabilities. The d33 of the ternary BTO/PPy/TiO2 heterojunction is 3.1 times that of the binary BTO/TiO2 counterparts. In-situ synchrotron-radiation-IR measurements indicates that electric fields excite electrons to higher energy levels and lead to larger electron densities in the heterojunction. The piezoelectric fields also enhance charge separations. Using cycled assembly, the ternary BTO/PPy/TiO2 heterojunctions are facilely constructed on a copper mesh substrate, and its application in effective photopiezocatalytic degradation reactions are demonstrated. We expect the study elucidate the mechanism underlining efficient energy conversion and application in the photopiezocatalytically active asymmetric heterojunction and inspire the design of efficient catalysts.
研究领域:
材料科学
·
催化
·
能量转换
·
纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 36
·2103989
·
IF 18.808
Xiao Wang,Yuanyuan Zhang,Yun Zhao,Guang Li,Jianhua Yan,Jianyong Yu,Bin Ding
Inorganic materials assembled with rigid elements such as crystals or graphitized carbon generally show brittleness and hardness. However, it is found that both TiO 2 ceramic crystal nanofibers (NFs) and carbon NFs show superior flexibility, in which the former are surprisingly knottable and the latter exhibit excellent bending-resilience property. The different flexure mechanisms are revealed by fabricating composite NFs of these two constituents and find that the carbon NFs can be recovered to the original states after releasing the external force, while the bending-resilience is weakened and the softness of the composite NFs is enhanced upon increasing the TiO 2 content. The graphitized carbon can store mechanical deformation energy that enables the NFs with bending-resilience, while both the homogeneous interfaces between TiO 2 crystals and the heterogeneous interfaces between TiO 2 and carbon can alleviate stress concentration, which reduce the flexural modulus of the composite NFs. By filling different contents of elastic carbon into TiO 2 NFs, a series of flexible NFs that exhibit gradient bending-resilience properties are fabricated. This study provides a deeper understanding of the mechanical properties of inorganic materials.
研究领域:
材料科学
·
纳米技术
·
陶瓷学
·
材料力学性能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）