Polymer‐Grafted Nanoparticles (PGNs) with Adjustable Graft‐Density and Interparticle Hydrogen Bonding Interaction. Issue 12 (17th November 2021)

• Record Type: Journal Article
• Authors: Yuan, Chenyun; Käfer, Florian; Ober, Christopher K.
• Other Names: Barz Matthias guestEditor.; Nuhn Lutz guestEditor.; Theato Patrick guestEditor.
• Is Part Of: Macromolecular rapid communications. Volume 43:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-11-17
• Subjects: ARGET‐ATRP -- core‐shell particles -- emulsion polymerization -- hydrogen bonding -- polymer‐grafted nanoparticles; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.202100629
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: Polymer‐grafted nanoparticles (PGNs) receive great attention because they possess the advantages of both the grafted polymer and inorganic cores, and thus demonstrate superior optical, electronic, and mechanical properties. Thus, PGNs with tailorable interparticle interactions are indispensable for the formation of a superlattice with a defined and ordered structure. In this work, the synthesis of PGNs is reported which can form interparticle hydrogen‐bonding to enhance the formation of well‐defined 2D nanoparticle arrays. Various polymers, including poly(4‐vinyl pyridine) (P4VP), poly(dimethyl aminoethyl acrylate) (PDMAEMA), and poly(4‐acetoxy styrene) (PAcS), are attached to silica cores by a "grafting from" in a mini emulsion‐like synthesis approach. SiO2 ‐PAcS brushes are deprotected by hydrazinolysis and converted into poly(4‐vinyl phenol) (PVP), containing hydroxyl groups as potential hydrogen‐bonding donor sites. Understanding and controlling interparticle interactions by varying grafting density in the range of 10 −2 –10 −3 chain nm −2, and the formation of interparticle hydrogen bonding relevant for self‐assembly of PGNs and potential formation of PGN superlattice structures are the motivations for this study. Abstract : In this work, the synthesis of well‐defined SiO2 ‐PDMAEMA, SiO2 ‐P4VP, and SiO2 ‐PAcS polymer‐grafted silica nanoparticles (PGNs) prepared using activators regenerated by electron transfer (ARGET‐ATRP) is demonstrated in a mini emulsion like synthesis approach. Interparticle hydrogen‐bonding interactions between SiO2 ‐PDMAEMA and SiO2 ‐PVP are chosen to support the formation of 2D superlattice PGNs structures.