Synthesis of A Novel Photoluminescence Self-healing Hydrogel

doi:10.7503/cjcu20210606

Abstract

Abstract:

Self-healing hydrogels with photoluminescence properties were prepared by free radical polymerization， which solved the fluorescence quenching problem of photoluminescence complexes in water phase. The oil-soluble Eu-containing rare earth complex is introduced into the hydrogel system by designing a covalent bond， and the complex is stable and non-diffusion in the hydrogel system. The Eu-containing rare earth complex has the characteristics of ultraviolet photoluminescence， which endows the hydrogel with good recognizability. At the same time， the hydrogel contains dynamic borate ester bonds， and its fast-healing properties enable the hydrogel to repair the damage in a short time when it is damaged， which provides a new idea for the preparation of luminescent hydrogel and identifiable biomedical materials.

Key words: Hydrogel, Photoluminescence, Borate ester linkage, Self-healing, Rare earth complex

CLC Number:

O631

TrendMD:

ZHOU Yonghui, LI Yao, WU Yuxuan, TIAN Jing, XU Longquan, FEI Xu. Synthesis of A Novel Photoluminescence Self-healing Hydrogel[J]. Chem. J. Chinese Universities, 2022, 43(2): 20210606.

Figures/Tables 15

Scheme 1 Synthetic route for the organic complex EDPM

Scheme 2 Synthesis mechanism of VNE hydrogel

Fig.1 Photographs of VNE?0(A) and VNE?4(B) hydrogels without and with UV?light irradiation

Fig.2 1H NMR spectrum of EDPM

Fig.3 FTIR spectra of the Eu?containing organic complex EDPM and VNE hydrogels

Fig.4 SEM image of the VNE?4 hydrogel(A) and statistics on pore diameter sizes of VNE?4 freeze?dried hydrogel after swelling(B)

Fig.5 Elemental content of VNE?4 hydrogel

Fig.6 Photos of VNE?4 hydrogel before(left) and after(right) stretching(A) and irradiated with UV during stretching(B)

Fig.7 Strain curves of VNE?4 hydrogel before(a) and after(b) healing

Fig.8 Photos of self?healing process of dyed VNE?4 hydrogel

Fig.9 Photos of self?healing process of VNE?4 hydrogel under microscope in 0(A) 20(B), 40(C) and 60 min(D)

Fig.10 Self healing conditions of VNE?4 hydrogels soaking in deionized water with different pH values

Fig.11 Emission spectra of Eu?containing polymers EDPM and VNE hydrogels

Fig.12 Photos of VNE hydrogel covered with chicken skin under UV irradiation

Fig.13 Cell viability(A) and optical image(B) of L929 mouse fibroblasts cultured with VNE?4 hydrogel under microscope

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