Dynamic Covalent Bond Cross‐Linked Luminescent Silicone Elastomer with Self‐Healing and Recyclable Properties

Abstract

Two aldehyde-modified tetraphenylene derivatives with different functionality are synthesized and exhibit different fluorescence properties. By incorporating tetraphenylene derivatives into polydimethylsiloxane (PDMS) networks, two elastomers are prepared through dynamic covalent cross-linking. The elastomers show excellent fluorescence properties, mechanical properties, thermal stability as well as self-healing and recycle properties. At the same time, the mechanical properties of the elastomers are influenced by the functionality of the tetraphenylene derivatives and the molecular weight of the PDMS. The self-healing process takes place quickly and the recycling process can be carried out by solution processing and hot pressing. It shows the similar tensile properties between the pristine and healed samples.

Organosilicon Fluorescent Materials

“…Polysiloxane-based fluorescent materials with cross-linked structures have been also developed rapidly. Since cross-linking polysiloxanes have the advantages of thermal endurance, aging resistance, and good flexibility, a number of fluorescent cross-linking polysiloxanes-based products with high performance could be manufactured by introducing fluorescent units into cross-linked polysiloxanes, such as fluorescent film materials [ 60 ], fluorescent elastomers [ 61 , 62 , 63 ], fluorescent flexible devices [ 64 ], etc. Polysiloxane as a good matrix material can provide abundant chemical sites for the attachment of fluorescent units.…”

Unprecedented toughness in transparent, luminescent, self-healing polymers enabled via hierarchical rigid domain design

“…3c and Table S2, ESI †). [11][12][13][21][22][23][24][25][26][27] Even compared with the non-luminescent strong and tough selfhealing elastomers reported in the literature, the toughness of our materials is still unprecedented (Fig. 3d).…”

Polymeric Emissive Materials Based on Dynamic Covalent Bonds

“…In this work, the dynamic imine bonds play a key role in the visualized microscopic processes for the self-healing gels. Following this work, Wang et al utilized a similar method to construct a self-healing luminescent polymer gel, consisting of PDMS and a classic AIEgen (tetraphenylethene) [ 30 ]. Because of the efficient self-healing and emission of the two polymer gels, several blocks with different emission colors could be conglutinated together to fabricate the fluorescent codes with superior performance in anticounterfeiting.…”