Reconstructable Gradient Structures and Reprogrammable 3D Deformations of Hydrogels with Coumarin Units as the Photolabile Crosslinks

Zhu，Chao Nan1; Li，Chen Yu1; Wang，Hu2; Hong，Wei3; Huang，Feihe2; Zheng，Qiang1; Wu，Zi Liang1

2021

10.1002/adma.202008057

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Morphing hydrogels have versatile applications in soft robotics, flexible electronics, and biomedical devices. Controlling component distribution and internal stress within a hydrogel is crucial for shape-changing. However, existing gradient structures of hydrogels are usually non-reconstructable, once encoded by chemical reactions and covalent bonds. Fabricating hydrogels with distinct gradient structures is inevitable for every new configuration, resulting in poor reusability, adaptability, and sustainability that are disadvantageous for diverse applications. Herein, a hydrogel containing reversible photo-crosslinks that enable reprogramming of the gradient structures and 3D deformations into various configurations is reported. The hydrogel is prepared by micellar polymerization of hydrophobic coumarin monomer and hydrophilic acrylic acid. The presence of hexadecyltrimethylammonium chloride micelles increases the local concentration of coumarin units and also improves the mechanical properties of the hydrogel by forming robust polyelectrolyte/surfactant complexes that serve as the physical crosslinks. High-efficiency photodimerization and photocleavage reactions of coumarins are realized under 365 and 254 nm light irradiation, respectively, affording reversible tuning of the network structure of the hydrogel. Through photolithography, different gradient structures are sequentially patterned in one hydrogel that direct the deformations into distinct configurations. Such a strategy should be applicable for other photolabile hydrogels toward reprogrammable control of network structures and versatile functions.

coumarins dynamic covalent bonds morphing hydrogel polyelectrolyte/surfactant complex reconstructable network

SCI ; EI

英语

NI期刊

其他

National Natural Science Foundation of China[51773179,51973189] ; Natural Science Foundation of Zhejiang Province of China[LR19E030002]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000635132700001

WILEY-V C H VERLAG GMBH

20211410163789

Acrylic monomers ; Chlorine compounds ; Crosslinking ; Deformation ; Flexible electronics ; Image reconstruction ; Micelles ; Polyelectrolytes ; Reusability

Electronic Equipment, General Purpose and Industrial:715 ; Colloid Chemistry:801.3 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1

MATERIALS SCIENCE

2-s2.0-85103404340

Scopus

1.Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou,310027,China
2.State Key Laboratory of Chemical Engineering,Center for Chemistry of High-Performance and Novel Materials,Department of Chemistry,Zhejiang University,Hangzhou,310027,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Zhu，Chao Nan,Li，Chen Yu,Wang，Hu,et al. Reconstructable Gradient Structures and Reprogrammable 3D Deformations of Hydrogels with Coumarin Units as the Photolabile Crosslinks[J]. ADVANCED MATERIALS,2021,33.

Zhu，Chao Nan.,Li，Chen Yu.,Wang，Hu.,Hong，Wei.,Huang，Feihe.,...&Wu，Zi Liang.(2021).Reconstructable Gradient Structures and Reprogrammable 3D Deformations of Hydrogels with Coumarin Units as the Photolabile Crosslinks.ADVANCED MATERIALS,33.

Zhu，Chao Nan,et al."Reconstructable Gradient Structures and Reprogrammable 3D Deformations of Hydrogels with Coumarin Units as the Photolabile Crosslinks".ADVANCED MATERIALS 33(2021).