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Abstract
We demonstrated here a facile and efficient synthesis of polyhedral oligomeric silsesquioxane-based amphiphilic polymer by thiol-ene click chemistry. The properties of polyhedral oligomeric silsesquioxane (POSS)–PEG amphiphilic polymers were studied in detail by a combination of 1H NMR, 13C NMR, 29Si NMR FT-IR, GPC, and TG analysis. The newly-designed thiol-ene protocol obtains only anti-Markovnikov addition POSS-based amphiphilic polymers when compared with platinum-catalysed hydrosilylation method. The critical micelle concentration (CMC) of the resulting polymers are in the range of 0.011 to 0.050 mg/mL, and dynamic light scattering (DLS) results revealed that the obtained amphiphilic polymers can self-assemble into nanoparticles in aqueous solutions with a bimodal (two peaks) distribution. Furthermore, the specific polymer showed obvious thermo-sensitive behaviour at 45.5 °C.
Highlights
In recent years, organic/inorganic hybrid nanomaterials have aroused widespread interest
The results showed that different morphology and thermodynamic properties of the amphiphilic telechelic polymers could be obtained through controlling the ratio of hydrophilic PEG homopolymer and hydrophobic
A series of eight polyethylene oxide functionalized polyhedral oligomeric silsesquioxane (POSS) amphiphilic polymers are synthesized through the metal-free thiol-ene click reaction, theirs self-assembly behaviour in aqueous solution, thermal stability, and thermo-responsive are systematically studied
Summary
Organic/inorganic hybrid nanomaterials have aroused widespread interest. POSS-based polymer is a kind of nanoscale silicate functional material with cage-like segments directly bound to the polymer chains Such newly-developed nanocomposite materials show synergistic properties of organic/inorganic materials, and present some new characteristics [22,23]. It is difficult to get rid of the residues in purification process, which affects the product performance, and limits its application in the field of biological medicine This reaction generally requires strict water-free and oxygen-free conditions. A series of eight polyethylene oxide functionalized POSS amphiphilic polymers are synthesized through the metal-free thiol-ene click reaction, theirs self-assembly behaviour in aqueous solution, thermal stability, and thermo-responsive are systematically studied
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