Preparation and characterisation of graphene oxide containing block copolymer worm gels

Abstract

This paper reports a generic method for preparing re-enforced nanocomposite worm-gels. Aqueous poly(glycerol monomethacrylate)-b-poly(2-hydroxypropyl methacrylate) (PGMA-PHPMA) and methanolic poly(glycerol monomethacrylate)-b-poly(benzyl methacrylate) (PGMA-PBzMA) worm gels were prepared by RAFT-mediated polymerisation-induced self-assembly...

3D printable, thermo-responsive, self-healing, graphene oxide containing self-assembled hydrogels formed from block copolymer wormlike micelles

“…PGMA-PHPMA-x% GO nanocomposite worm gels prepared via physical mixing copolymer at low temperature in the presence of different sized GO flakes In our previous work, 27 GMA 58 -PHPMA 170 -x% GO (G 58 -H 170 -x% GO) nanocomposite gels were prepared by initially synthesising a PGMA-PHPMA (G-H) block copolymer worm gel and subsequently mixing an aqueous dispersion of GO with the freeflowing copolymer at low temperature. On re-heating to room temperature, nanocomposite worm gels with improved mechanical properties were obtained.…”

“…In previous work, our group investigated the preparation of GO-containing block copolymer worm-like micelle (worm) gels prepared by polymerisation-induced self-assembly (PISA) by exploiting thermal worm-to-sphere morphological transitions. 27 GO was mixed with pre-formed co-polymer and the gel was allowed to reform on heating or cooling, depending on the formulation. Specifically, the diblock copolymer worm hydrogel composition which allowed nanocomposite preparation at low temperature was based on poly(glycerol monomethacrylate)- b -poly(2-hydroxypropyl methacrylate) (PGMA-PHPMA) prepared via RAFT aqueous dispersion polymerisation.…”

Preparation of polymer nanoparticle-based complex coacervate hydrogels using polymerisation-induced self-assembly derived nanogels

“…24,25 Furthermore, the surface chemistry of PISA-derived NPs can be readily modified by selecting macro-CTA(s) with the desired distribution of functional groups, which enables the precise design of NPs exhibiting e.g. , non-ionic, 26,27 anionic 28–30 or cationic coronas. 31,32 For example, Wen et al 28 prepared poly(potassium 3-sulfopropyl methacrylate)-poly(benzyl methacrylate) (PKSPMA-PBzMA) spherical diblock copolymer NPs with tuneable diameters (20–200 nm) in alcohol/water mixtures by varying the copolymer composition, and/or by altering the co-solvent composition.…”

3D Interlayer Slidable Multilayer Nano-Graphene Oxide Acrylate Crosslinked Tough Hydrogel

“…Hydrogels have excellent potential for biomedical and bioengineering applications, but the lack of mechanical properties leads to their limitations in practical applications . The methods of strength enhancement mainly focus on the following two kinds: (1) enhancing the mechanical energy dissipation − and (2) enhancing the uniformity of polymer network distribution. , …”

“…2 The methods of strength enhancement mainly focus on the following two kinds: (1) enhancing the mechanical energy dissipation 3−5 and (2) enhancing the uniformity of polymer network distribution. 6,7 For the former, a "sacrifice bond" was proposed in the structural design of double network hydrogels, 8,9 which can dissipate mechanical energy through the fracture of the rigid network or short chains. 10 In subsequent studies, hydrogels prepared from dynamic covalent networks, such as the alginate−Ca 2+ network, 11−13 showed high mechanical energy dissipation efficiency and self-healing ability.…”