Synthesis of well-defined core–shell nanoparticles based on bifunctional poly(2-oxazoline) macromonomer surfactants and a microemulsion polymerization process

Abstract

Surface-functional nanoparticles have been fabricated by utilizing bifunctional poly(2-oxazoline) macromonomers as surfactants in a microemulsion process.

Chemoenzymatic one-pot reaction of noncompatible catalysts: combining enzymatic ester hydrolysis with Cu(i)/bipyridine catalyzed oxidation in aqueous medium

“…Therefore, we decided to use the microemulsion approach for the preparation of catalytically active nanoparticles. 36,37 These nanoparticles are composed of a crosslinked core to prevent any interaction between the catalyst and the enzyme and an amphiphilic polymer shell which is compatible with the aqueous phase and provides an hydrophobic layer that contains the Cu(I)/bipyridine catalyst (Scheme 2).…”

“…This is in good agreement with recent data. 36,37 Successful core-crosslinking and nanoparticle formation was Scheme 4 Synthesis of the amphiphilic, bipyridine-functionalized block copolymer P1. Table 2 Analytical data of the polymers P1 and P2…”

Enceladus: First Observed Primordial Soup Could Arbitrate Origin-of-Life Debate

“…Further, micelles of amphiphilic compounds help solubilize otherwise water-insoluble hydrophobic compounds, absorbing them into their lipophilic cores (Bissette et al, 2014). At higher absorption stoichiometry, structures with larger hydrophobic cores emerge, such as nano- and micro-emulsion droplets (Kronberg et al, 2014; Kampmann et al, 2016), thus increasing the aqueous concentrations of the water-insoluble compounds 1,000-fold (Uchegbu, 2013). In the same vein, it has been proposed that insoluble disordered organic compounds (tars) could be incorporated into ordered lipid bilayer structures (Yeom et al, 1995; Bywater, 2012).…”

Polyoxazoline associated with cardanol for bio‐based linear alkyl benzene surfactants

“…More recently, POx blocks have been linked to bio‐based blocks such as glycopolymers and fatty derivatives or to petro‐based blocks including polysiloxanes, aliphatic polyesters and fluorinated chains, giving various amphiphilic copolymers with surfactant or self‐assembling properties . Their use as a surfactant for instance for emulsion polymerization or solubilization of dyes has recently been reported …”

“…[40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] Their use as a surfactant for instance for emulsion polymerization or solubilization of dyes has recently been reported. 57,58 Here, in order to replace the toxic NPE surfactant, a peculiar phenolic lipid, cardanol, was associated with a hydrophilic poly(2-methyl-2-oxazoline) chain ( Fig. 1).…”