RSC Advances
·
2024
·Vol. 14
·期 8
·5417-5424
·
IF 3.9
Jie Yi,Yajing Yang,Xi-ming Song,Yuxuan Zhang
Azobenzene-containing poly(aryl ether)s are a potential type of photoinduced deformable high-performance polymer. However, research on photoinduced deformation of azobenzene-containing poly(aryl ether)s focuses mainly on poly(aryl ether)s containing azobenzene groups in the main chain. In this paper, the photoinduced deformation of poly(aryl ether)s containing azobenzene groups in the side chain was studied for the first time. Two novel poly(aryl ether)s containing azobenzene groups in the side chain were synthesized, and their photoinduced isomerization behavior and photoinduced deformation behavior were studied. It could be seen that the match of the excitation luminescence to the maximum absorption peak of the azobenzene groups was more compatible, and the photoinduced motion of the polymers was faster. In addition, poly(aryl ether)s containing azobenzene groups in the side chain showed highly stable photoinduced deformation. The results of this work will be helpful for designing polymers which could be controlled by lasers of different wavelengths.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2022
·Vol. 43
·期 6
·2100717
·
IF 5.006
Zui Liu,Guangqiang Guo,Junqiu Liao,Yongjie Yuan,Hailiang Zhang
Photoresponsive liquid crystal elastomers (LCEs) have aroused much attention due to their unique structures, properties, and potential applications. However, many reported photoresponsive LCEs show small photoinduced deformation with a slow deformation speed, which limits their application to a certain extent. In this article, multiple hydrogen bond component and biphenyl component was introduced into photoresponsive LCEs bearing cyanostilbene by copolymerization, and prepared a series of LCEs CSm-BPn (CS and BP means cyanostilbene and biphenyl component, respectively; m, n means the content ratio of CS and BP). All uniaxially oriented CSm-BPn fibers show photoinduced deformation behavior under 365 nm UV light except for CS0-BP5. The introduction of hydrogen bond and the decrease of glass transition temperature realize large deformation and fast deformation speed. Besides, the properties of LCEs are successfully regulated by changing the content ratio of each component. What's more interesting is that the addition of appropriate amount of biphenyl can significantly improve and manipulate the deformation property of the CSm-BPn fibers. The maximum bending angle can reach 175 ° , and the whole photoinduced deformation process only takes 11 s. The photoresponsive LCEs with such large bending angle and fast deformation rate are rarely reported.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 40
·14139-14145
·
IF 7.393
Yuxuan Zhang,Xue Zhao,Jianhang Yuan,Xialei An,Xuefang Sun,Jie Yi,Xi-Ming Song
The research on the photomechanical effects of azobenzene-containing high performance polymer materials has received much attention due to their potential applications in high temperature environments. At present, there are few types of photoinduced deformable polymers based on azobenzene-containing high performance polymers, and their photoinduced deformation rates need to be improved. In this paper, a novel series of azobenzene-containing poly(arylene ether)s with various contents of binaphthalene groups were synthesized. Introducing binaphthalene groups into azobenzene-containing poly(arylene ether)s was a helpful strategy to increase the free volume, which could increase the photoinduced deformation rates of the polymers. Under 442 nm unpolarized laser irradiation, the photoinduced deformation rates increased with the contents of binaphthalene groups of the polymers. Under 442 nm polarized laser irradiation, the cantilevers of the azobenzene-containing poly(arylene ether)s have shown unusual photoinduced deformation behavior. When the polarization direction of the polarized laser was perpendicular to the long axis of the cantilevers of the polymers, the cantilevers bent away from the excitation laser at the beginning, then bent towards the excitation laser and could reach the initial position. The angles of the polymers bent away from the excitation laser increased with the contents of binaphthalene groups of the polymers. The photoinduced deformation behavior of the polymers could be adjusted by adjusting the polarization direction of the polarized laser, the laser power and the thickness of the cantilevers of the polymer. This interesting phenomenon has not been reported in previous research on the photoinduced deformation behavior of azobenzene-containing high performance polymers.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOID JOURNAL
·
2023
·Vol. 85
·期 2
·167-176
·
IF 1.1
Ai X. T.,Wang L. E.,Luo X.,Tang B.,Li S. L.,Zhu H. E.,Tang H. L.,Li Y. B.,Yang C. L.,Lv W. Y.
Abstract This study investigated the controllable fabrication of anisotropic particles with different sizes and morphologies via self-assembly and photoinduced deformation of azo colloidal microspheres, which were formed from a typical azo molecular material (IAC-4) that contains a 1,4,3,6-dianhydrosorbitol core and the cinnamate peripheral groups. Firstly, azo colloidal microspheres were obtained by self-assembly via gradually adding deionized water into IAC-4 solution of tetrahydrofuran. For precisely controlling the length of short axis of anisotropic particles, IAC-4 colloidal microspheres with different and uniform sizes were obtained by adjusting the IAC-4 concentration, adding rate of water and stirring rate. The size of colloidal microspheres becomes smaller with the increase in IAC-4 concentration, the adding rate of water and the stirring rate. Finally, IAC-4 colloidal microspheres in the solid state, perpendicularly irradiated by the linearly polarized laser beam (λ = 488 nm), were irreversibly and controllably stretched into anisotropic particles with the different morphologies, length of long axis and axial ratio via adjusting the irradiation time and the power of laser beam.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL EDUCATION
·
2024
·
IF 2.5
Miaomiao Lu,Yidan Jing,Tai Feng,Xiaomin Zhang
A comprehensive teaching experiment plan tailored for third-year undergraduates has been developed. Initially, instructors synthesize (E)-2-(4-((4-(2-hydroxyethoxy)-3-methylphenyl)diazenyl)phenoxy)-ethan-1-ol(M-Azo-2) monomer as part of the preclass preparation. Subsequently, students perform an acylation reaction experiment to prepare an azobenzene derivative containing cross-linking points on both sides. This derivative is then combined with poly(ethylene glycol) dimethacrylate in the absence of external solvent under conditions conducive to radical polymerization, resulting in a thin film that exhibits light-wet dual-stimulation responsiveness. This process enables students to comprehend both the chemical reactivity and photoisomerization propensity of azobenzene to effectively bridge elements of organic chemistry and polymer chemistry. The experiment demonstrates three vivid and novel biomimetic phenomena: “color-changing flowers”, “phototropic seedlings”, and “mimosa”, which display photochromic, light-induced deformation, and humidity-responsive behavior of the film, respectively. This experiment enhances students’ appreciation for the application potential of biomimetic materials and fosters innovative scientific thinking.
研究领域:
有机化学
·
聚合物化学
·
材料科学
·
仿生学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）