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Issue 28, 2019
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Nanonetwork photogrowth expansion: Tailoring nanoparticle networks’ chemical structure and local topology

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Abstract

The manipulation of covalent polymer networks in the bulk or in the nanoscale seeks to broaden material property variations from an existing parent structure with the possibility to make fundamental changes in nanoparticle compositions which is otherwise difficult to accomplish through bottom up approaches. In this contribution, a parent nanoparticle network prepared by an intermolecular chain cross-linking process containing trithiocarbonate photoactive cross-linking groups has been investigated in its ability to form various novel nanonetworks through a photogrowth expansion process using 10-phenylphenothiazine (PTH) as a photoredox catayst under violet light irradiation, incorporating statistical copolymers and block copolymers into the existing nanonetwork. Hydrophilic and hydrophobic homo-and statistical copolymer incorporation leads to custom designed, tailored nanonetworks and stimuli-responsive behavior. For example, particles expanded by incorporation of PNIPAAM collapse after thermoresponsive behavior above 32 °C and shrink to approximately half of their original size. Furthermore, ABA triblocks and ABABA pentablocks of MA, TFEA, NIPAAM and tBA are integrated with a high degree of control into a parent particle. In this work, we have demonstrated the feasibility of parent nanonetwork structures to expand their network architecture reaching up to the microscale range to give soluble soft matter networks, containing controlled compositions of homopolymers, statistical copolymers, or pentablock structures. The taught concept gives opportunities to further design and alter the network topology in confined structures to tailor properties and function.

Graphical abstract: Nanonetwork photogrowth expansion: Tailoring nanoparticle networks’ chemical structure and local topology

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Publication details

The article was received on 01 May 2019, accepted on 24 Jun 2019 and first published on 25 Jun 2019


Article type: Paper
DOI: 10.1039/C9PY00639G
Polym. Chem., 2019,10, 3841-3850

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    Nanonetwork photogrowth expansion: Tailoring nanoparticle networks’ chemical structure and local topology

    M. W. Lampley, E. Tsogtgerel and E. Harth, Polym. Chem., 2019, 10, 3841
    DOI: 10.1039/C9PY00639G

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