Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-05T04:23:46.171Z Has data issue: false hasContentIssue false
  • English
  • Français

Double-layer hydrogel with photoresponsive shape memory features for controllable catalysis

Published online by Cambridge University Press:  29 April 2019

Jinghang Leng ,
Shujing Li ,
Mingxin Yang  and
Jie Hu
Jinghang Leng
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, People’s Republic of China
Shujing Li*
Affiliation:
Key Laboratory of Cosmetic, China National Light Industry, Beijing Technology and Business University, Beijing 100048, People’s Republic of China
Mingxin Yang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, People’s Republic of China
Jie Hu*
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, People’s Republic of China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
Get access

Abstract

A photoresponsive double-layer hydrogel has been developed, in which light-sensitive cinnamic moieties are grafted onto a polyacrylamide network to produce a photoresponsive layer and pure polyacrylamide formed the supporting layer. Ag nanoparticles were dispersed using in situ reduction on the photoresponsive layer to act as the catalyst. The as-fabricated hydrogel exhibits a shape memory effect and controllable catalytic behavior under an external light stimulus. When exposed to ultraviolet (UV) light at λ > 260 nm, the resulting cycloaddition of cinnamic moieties not only fix the hydrogel’s temporary shape, but also greatly slow down the catalytic reaction rate. After irradiated with UV light at λ < 260 nm, however, the newly formed crosslinking points are reversibly cleaved. This results in the shape recovery of the hydrogel to its permanent shape. At the same time, the catalytic reaction was greatly accelerated because of the facile diffusion of the reactants into the hydrogel.

Keywords

compositecatalyticpolymer
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 10 , 28 May 2019 , pp. 1795 - 1804
Copyright
Copyright © Materials Research Society 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Löwenberg, C., Balk, M., Wischke, C., Behl, M., and Lendlein, A.: Shape-memory hydrogels: Evolution of structural principles to enable shape switching of hydrophilic polymer networks. Acc. Chem. Res. 50, 723–732 (2017).CrossRefGoogle ScholarPubMed
Lu, W., Le, X.X., Zhang, J.W., Huang, Y.J., and Chen, T.: Supramolecular shape memory hydrogels: A new bridge between stimuli-responsive polymers and supramolecular chemistry. Chem. Soc. Rev. 46, 1284–1294 (2017).CrossRefGoogle ScholarPubMed
Huang, W.M., Zhao, Y., Wang, C.C., Ding, Z., Purnawali, H., Tang, C., and Zhang, J.L.: Thermo/chemo-responsive shape memory effect in polymers: A sketch of working mechanisms, fundamentals and optimization. J. Polym. Res. 19, 9952 (2012).CrossRefGoogle Scholar
Saatchi, M., Behl, M., Nöchel, U., and Lendlein, A.: Copolymer networks from oligo(ε-caprolactone) and n-butyl acrylate enable a reversible bidirectional shape-memory effect at human body temperature. Macromol. Rapid Commun. 36, 880–884 (2015).CrossRefGoogle ScholarPubMed
Nöchel, U., Behl, M., Balk, M., and Lendlein, A.: Thermally-induced triple-shape hydrogels: Soft materials enabling complex movements. ACS Appl. Mater. Interfaces 8, 28068–28076 (2016).CrossRefGoogle ScholarPubMed
Salvekar, A.V., Huang, W.M., Xiao, R., Wong, Y.S., Venkatrarnan, S.S., Tay, K.H., and Shen, Z.X.: Water-responsive shape recovery induced buckling in biodegradable photo-cross-linked poly(ethylene glycol) (PEG) hydrogel. Acc. Chem. Res. 50, 141–150 (2017).CrossRefGoogle ScholarPubMed
Xu, H., Yu, C., Wang, S., Malyarchuk, V., Xie, T., and Rogers, J.A.: Deformable, programmable, and shape-memorizing micro-optics. Adv. Funct. Mater. 3, 3299–3306 (2013).CrossRefGoogle Scholar
Hines, L., Petersen, K., Lum, G.Z., and Sitti, M.: Soft actuators for small-scale robotics. Adv. Mater. 29, 1603483 (2017).CrossRefGoogle ScholarPubMed
Lendlein, A., Jiang, H.Y., Jünger, O., and Langer, R.: Light-induced shape-memory polymers. Nature 434, 879–882 (2005).CrossRefGoogle ScholarPubMed
Yu, Y.L., Nakano, M., and Ikeda, T.: Directed bending of a polymer film by light—Miniaturizing a simple photomechanical system could expand its range of applications. Nature 425, 145 (2003).CrossRefGoogle Scholar
Yu, H.F. and Ikeda, T.: Photocontrollable liquid-crystalline actuators. Adv. Mater. 23, 2149–2180 (2011).CrossRefGoogle ScholarPubMed
Wu, W., Yao, L.M., Yang, T.S., Yin, R.Y., Li, F.Y., and Yu, Y.L.: NIR-light-induced deformation of cross-linked liquid-crystal polymers using upconversion nanophosphors. J. Am. Chem. Soc. 133, 15810–15813 (2011).CrossRefGoogle ScholarPubMed
Kumpfer, J.R. and Rowan, S.J.: Thermo-, photo-, and chemo-responsive shape-memory properties from photo-cross-linked metallo-supramolecular polymers. J. Am. Chem. Soc. 133, 12866–12874 (2011).CrossRefGoogle ScholarPubMed
Kozlovskaya, V., Kharlampieva, E., Mansfield, M.L., and Sukhishvili, S.A.: Poly(methacrylic acid) hydrogel films and capsules: Response to pH and ionic strength, and encapsulation of macromolecules. Chem. Mater. 18, 328–336 (2006).CrossRefGoogle Scholar
Xu, B., Li, Y., Gao, F., Zhai, X., Sun, M., Lu, W., Cao, Z., and Liu, W.: High strength multifunctional multiwalled hydrogel tubes: Ion-triggered shape memory, antibacterial, and anti-inflammatory efficacies. ACS Appl. Mater. Interfaces 7, 16865–16872 (2015).CrossRefGoogle ScholarPubMed
Zhao, R., Hu, J., Niu, C.N., Li, Y.F., Hu, M.T., Liu, R.J., and Li, S.J.: A smart nanoreactor with photo-responsive molecular switches for controlling catalytic reactions. J. Mater. Chem. C 4, 4748–4755 (2016).CrossRefGoogle Scholar
Wu, X.L., Huang, W.M., and Lu, H.B.: Characterization of polymeric shape memory materials. J. Polym. Eng. 37, 1–20 (2017).CrossRefGoogle Scholar
Supplementary material: File

Leng et al. supplementary material

Leng et al. supplementary material 1

Download Leng et al. supplementary material(File)
File 921.8 KB