Visible light triggered controlled formation of rapidly self-healing hydrogels based on thiol-disulfide exchange

Wang, Linlin1,2; Cao, Qingchen2,3; Wang, Xing2,3; Wu, Decheng2,4

2022-03-01

10.1039/d1sm01698a

Soft Matter   影响因子和分区

1744-683X

1744-6848

The properties of stimuli-responsive hydrogels can be tailored under various external stimuli, but it is difficult to realize the customized adjustment of hydrogel properties since the crosslinking degree in the gelation process is intractable. Here, a visible light triggered thiol-disulfide exchange reaction was applied for constructing disulfide-crosslinked hydrogels from P(EMA-SS-PEG), a poly(ethylene glycol) grafted poly(ethyl methacrylate) derivative with a disulfide linkage as the grafting point. This photochemical method provides mild gelation conditions to handily regulate the morphology, mechanical properties, swelling ratio, and degradation rate of hydrogels by simply varying the irradiation time. Based on this strategy, these disulfide-crosslinked hydrogel coatings showed rapid self-healing in 10 min under ambient conditions, which was dependent on the width of the scratch, temperature, and humidity. Notably, spraying water on these coatings could significantly accelerate the self-healing process of large scratches (360 mu m) at room temperature with a self-healing time of 1 hour, enabling the practical application of hydrogel coatings in a natural environment.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[21935011,51973226,21725403] ; Youth Innovation Promotion Association CAS[2019031]

Chemistry ; Materials Science ; Physics ; Polymer Science

Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science

WOS:000776055600001

ROYAL SOC CHEMISTRY

20221611974559

Coatings ; Degradation ; Gelation ; Grafting (chemical) ; Light ; Polyethylene glycols ; Polyethylene oxides ; Self-healing materials ; Sulfur compounds

Metals, Plastics, Wood and Other Structural Materials:415 ; Light/Optics:741.1 ; Colloid Chemistry:801.3 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Coating Materials:813.2 ; Organic Polymers:815.1.1

Web of Science

1.Shandong Univ, Key Lab Special Funct Aggregated Mat, Sch Chem & Chem Engn, Minist Educ, Jinan 250100, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Southern Univ Sci & Technol, Dept Biomed Engn, Shenzhen 518055, Guangdong, Peoples R China

Wang, Linlin,Cao, Qingchen,Wang, Xing,et al. Visible light triggered controlled formation of rapidly self-healing hydrogels based on thiol-disulfide exchange[J]. Soft Matter,2022,18:3004-3012.

Wang, Linlin,Cao, Qingchen,Wang, Xing,&Wu, Decheng.(2022).Visible light triggered controlled formation of rapidly self-healing hydrogels based on thiol-disulfide exchange.Soft Matter,18,3004-3012.

Wang, Linlin,et al."Visible light triggered controlled formation of rapidly self-healing hydrogels based on thiol-disulfide exchange".Soft Matter 18(2022):3004-3012.