Issue 13, 2018

Thermoresponsive double network cryogels from dendronized copolymers showing tunable encapsulation and release of proteins

Abstract

A series of double-network cryogels (DNCs) were prepared from oligoethylene glycol (OEG)-based dendronized copolymers as the first network and polyvinyl alcohol (PVA) as the second network. The dendronized copolymers were composed of dendritic OEG units, as well as triethoxysilyl, amine or carboxyl groups. The dendritic OEGs ensured characteristic thermoresponsiveness and triethoxysilyl groups were for crosslinking, while amino and carboxyl groups were designed to provide charged species for specifically interacting with proteins. PVA behaves as a mutual support which ensures the stability and mechanical properties of the cryogels. These DNCs exhibited good thermoresponsiveness and biocompatibility. Upon increasing the temperature above their cloud points (Tcps), the cryogels became dehydrated with enhanced hydrophobicity, and thus their porous structures shrank. This property was utilized to mediate encapsulation and release of proteins. The loading and release efficiencies of different proteins were found to be dominated by hydrophilic to hydrophobic transitions of the first network, and at the same time, by the properties of proteins. At room temperature, the cryogel could efficiently capture model proteins, while above Tcps, more than 80% of lysozyme could be released in 24 h with enzyme activity remaining unchanged. These series of smart cryogels based on thermoresponsive dendronized copolymers may provide promising applications for the reversible capture of enzymes or proteins.

Graphical abstract: Thermoresponsive double network cryogels from dendronized copolymers showing tunable encapsulation and release of proteins

Supplementary files

Article information

Article type
Paper
Submitted
31 Ker. 2017
Accepted
17 Cʼhwe. 2018
First published
19 Cʼhwe. 2018

J. Mater. Chem. B, 2018,6, 1903-1911

Thermoresponsive double network cryogels from dendronized copolymers showing tunable encapsulation and release of proteins

X. Feng, J. Liu, G. Xu, X. Zhang, X. Su, W. Li and A. Zhang, J. Mater. Chem. B, 2018, 6, 1903 DOI: 10.1039/C7TB03352D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements