Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 18
·4400-4407
·
IF 5.256
Mingtong Li,Hui Zhang,Mei Liu,Bin Dong
In this paper, we report a fish-like enzymeless motor, which consists of a phenylboronic acid modified poly(N-isopropylacrylamide) hydrogel and a surfactant, i.e. sodium dodecyl sulfate. The motor is capable of moving autonomously upon exposure to the glucose molecule. This phenomenon originates from the complexation between glucose and phenylboronic acid, which leads to the swelling of the hydrogel and the release of the surfactant, thus propelling the whole structure based on the Marangoni effect. Interestingly, the motor's moving velocity is directly proportional to the glucose concentration. Through the introduction of a magnetically responsive material, the motion direction of the motor can be manipulated. More interestingly, the combination of the glucose-dependent motion and magnetically steerable motion allows us to directly visualize the glucose concentration in human serum or urine. We thus believe that the motor reported in the current study may have potential for application in the field of glucose sensing for the detection and monitoring of diabetes.
研究领域:
生物医学工程
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 38
·16537-16545
·
IF 3.288
Zhaohui Huang,Mengjiao Yi,Yihan Liu,Ping Qi,Aixin Song,Jingcheng Hao
Two polymerizable surfactants with different numbers of double bonds, 3-undecylene-1-vinylimidazolium bromide (C11VIMBr) and 3-dodecyl-1-vinylimidazolium bromide (C12VIMBr), were chosen to prepare magnetic surfactant monomers by introducing Mn2+, Gd3+ and Ho3+. All the surfactant monomers exhibited paramagnetism except for C12VIMMn that exhibited ferromagnetism. The surface activity results indicated that the magnetic counterions tended to reduce the critical micelle concentration (cmc) and increase the dissociation constant of the surfactants, which was attributed to the stronger hydrophobicity of the magnetic anions than that of Br−. Compared with the surfactant monomers with Br− as counterions, these magnetic surfmers showed thermotropic liquid crystal (LC) behaviors within a certain range of temperature. C11VIMMn, C12VIMMn and C12VIMHo could form smectic A (SmA) LC phases whereas C11VIMGd, C11VIMHo and C12VIMGd produced cubic phases with higher viscosity. The magnetic LC films with ordered nanostructures were directly obtained by in situ polymerization of the magnetic surfmers without a significant change of magnetic strength. The magnetic LC films obtained could be attracted and removed by an external magnet, providing a possibility for the development of magnetically responsive solid electrolytes and efficient adsorbents.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Dingpeng Peng,Zean lin,Dhandapani Kuzhandaivel,Xiaowen Pu,Lixin Wu,Zixiang Weng
Shape Memory Polymers (SMPs) have emerged as a promising class of intelligent materials because of their unique ability to respond to external stimuli. The proposed method for fabricating magnetic shape-memory polymer composites (DLP-M-SMPs) using digital light processing (DLP) 3D printing technology represents a significant advancement in this field. By combining the shape memory properties of SMPs with their magnetic responsiveness, these composites can overcome the limitations of traditional thermally driven SMPs, such as their narrow operating temperature ranges and poor adaptability to harsh environments. The DLP-M-SMPs developed in this study demonstrated remarkable mechanical properties and shape-memory performance. With a high elongation at break of 760 % at room temperature, these materials exhibit exceptional flexibility and durability. Shape fixation rates exceeding 96 % and shape recovery rates exceeding 99 % indicate their ability to reliably maintain and recover programmed shapes. Furthermore, the successful 3D printing of complex structures capable of shape recovery under magnetic actuation demonstrated the versatility and potential of these materials for various applications. This innovative approach for fabricating high-resolution, high-performance magnetic shape-memory materials opens up new possibilities in fields such as flexible robotics and biomedical engineering, where precise control and adaptability are crucial.
研究领域:
材料科学
·
高分子科学
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增材制造
·
智能材料与结构
·
生物医学工程
·
柔性机器人
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Meng Xianghe,Li Shishi,Shen Xingjian,Tian Chenyao,Mao Liyang,Xie Hui
Soft machines respond to external magnetic stimuli with targeted shape changes and motions due to anisotropic magnetization, showing great potential in biomimetic applications. However, mimicking biological functionalities, particularly the complex hollow structures of organs and their dynamic behaviors, remains challenging. Here, we develop a printing method based on three-dimensional uniform magnetic field-assisted stereolithography to fabricate thin-walled soft machines with internal cavities and programmable magnetization. This printing technique employs Halbach arrays and an electromagnetic solenoid to generate an adjustable uniform magnetic field (up to 80 millitesla), efficiently orienting ferromagnetic particles, followed by solidification with patterned ultraviolet light. A support strategy and optimized material composition enhance printing stability and success rates. Our developed method enables fabrication of magnetic-driven soft machines capable of peristaltic propulsion, unidirectional fluid transport, periodic pumping action, and intake-expulsion deformation. These structures, achieving hollow ratios as high as 0.92 and enabling parallel manufacturing, highlight this technique’s considerable potential for biomedical applications by emulating complex biological behaviors and functions.
研究领域:
生物医学工程
·
软体机器人
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功能材料
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增材制造
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仿生学
·
磁响应材料
·
微纳制造
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）