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In this study, self-assembled Ru-containing polymer-MWNTs hybrid thin films were synthesized using metal-ligand (terpyridine, (tpy)) interactions. The subsequent deposition of tpy and Ru-functionalized polymer (tpy-PVA-Ru) with metal ions such as Zn(II) or Cu(II) and tpy-functionalized MWNT resulted in photoactive polymer-MWNTs hybrid thin films. The photoinduced electron transfer from Ru complexes...
Telechelic (T) and end-functionalized (E) perfluorocarbon (RF = C7F15 and C13F27) polystyrene with molecular weights (MWs) of about 15 k and 30 k and the corresponding isobaric polybutylmethacrylate (PS/PBMA) were synthesized by a combination of ATRP and Cu (I) catalyzed click-coupling reactions. Blends (1/1 w/w) of the E− and T-type PS and PBMA having nearly identical MWs of 15 and 30 kDa and RF...
The aggregation behaviour in aqueous solution of hydrophobically modified polyacrylates, synthesized by Atomic Transfer Radical Copolymerisation (ATRP) of mixtures of alkyl acrylate and t-butyl acrylate and subsequent hydrolysis of the t-butyl acrylate, was investigated by a combination of static and dynamic light scattering with small-angle neutron scattering (SANS). The degree of amphiphilicity...
Both temperature and light stimuli-responsive 4-propoxyazobenzene-terminated poly(N-isopropylacrylamide)s (PNIPAMs) were successfully synthesized by the atom transfer radical polymerization (ATRP) of NIPAM. 1H NMR and UV–vis absorption spectra indicated rapid photoisomerization rate of 4-propoxyazobenzene moiety. Interestingly, the lower critical solution temperature (LCST) for PNIPAM aqueous solution...
The production of polymer nanocomposites from solution consists of the mixing of the polymer and nanoparticle in solution and subsequent evaporation of the solvent. We examine the formation of polyacrylonitrile and C60 fullerene nanocomposites, with a focus on monitoring these two steps. The results of this study indicate that the nanoparticles are individually dispersed with the polymer chains in...
We have previously reported the formation of polymer/fullerene core–shell composite nanofibers (NFs) through self-assembly of functionalized conjugated block copolymers and fullerene derivatives, by cooperation of orthogonal non-covalent interactions including block copolymer phase separation, fullerene aggregation, poly(3-hexylthiophene) (P3HT) crystallization and complementary hydrogen bonding....
Poly(ethylene oxide)-poly(2-methoxyethyl acrylate) diblock copolymers (PEO-b-PMEA) are synthesized by RAFT aqueous dispersion polymerization of MEA using poly(ethylene oxide) macromolecular chain transfer agent as a reactive steric stabilizer. Both segments are well-known to be bio- and blood-compatible polymers. This formulation enables the production of various particle morphologies such as spheres,...
In the following is described the combination of straight biochemical and organic routes to graft nucleotide sequences to a chitosan backbone. The resulting chitosan-g-ssDNA hybrid self-assembles into submicrometer size structures in dilute aqueous solution as assessed by atomic force and electron microscopy imaging. The hypothesis of self-assembly driven by chemical incompatibility between the amphiphilic...
The interaction of the diacid chloride (2) of N,N’-bis(5″-carboxypentyl)-4,4′bipyridnium bis(hexafluorophosphate) (1) with m-phenylene-5′-hydroxymethyl-1′,3′-phenylene-32-crown-10 (3) at −70 °C led to the in situ formation of a pseudorotaxane 4 as an AB2 monomer, which was allowed to polymerize by raising the temperature and adding a catalytic amount of pyridine. The resulting hyperbranched polymer...
An amphiphilic, heat-sensitive, elastin-like co-recombinamer that exhibits different self-assembled concentration-dependent morphologies in aqueous solution has been studied. The spherical micelles observed at low concentration turn into small cylindrical micelles as the concentration increases. Further increases in concentration give rise to a lyotropic hydrogel. This hydrogel is formed by organization...
Here we report a photo, temperature and pH responsive copolymer which was conveniently synthesized by quaternization between the spiropyran derivative (SPN–Cl) and dimethylaminoethyl units of poly(dimethylaminoethyl methacrylate) (PDMAEMA). In aqueous solution, the synthesized copolymer P(DMAEMA-SP) could self-assemble into polymeric nanoparticles. The spiropyran-quaternized segments endow the system...
Cholesterol self-assembles into weakly ordered aggregates when tethered to a crosslinked hydrogel network of poly(ethylene glycol) (PEG). PEG-diacrylate and cholesterol-PEG-acrylamide (PEG-chol) were co-polymerized in organic solvent and transferred to water for equilibrium swelling. Small-angle x-ray scattering revealed self-assembled cholesterol structures not present during network synthesis. At...
Ultrafiltration membranes composed of polyethersulfone (PES) and aminated PES (PES-NH2) were fabricated using a non-solvent-induced phase separation process, and then zinc oxide (ZnO) nanoparticles were assembled onto the membrane surface. To assemble ZnO nanoparticles onto the PES/PES-NH2 membrane surface, thionyl chloride-terminated ZnO nanoparticles were reacted with the amine groups in PES-NH2...
Linear and star-shaped polymers have been synthesized by the controlled ring-opening (ROP) polymerization of l- and d-lactide using 1-methyl-2-hydroxymethyl-3-butylimidazolium tetrafluoroborate and dipentaerythritol as initiators, respectively. To introduce carboxylic end-groups onto the star-shaped polylactides, the reaction of –OH end-groups with succinic anhydride was employed. Afterwards, the...
We report here the formation of polycarbodiimide-g-polystyrene copolymer secondary structures, i.e. nano-rings, “craters”, and spherical particles, resulted from dewetting phenomena that have been corroborated by combination of tapping mode AFM, SEM, DLS, and powder XRD techniques. These morphological findings represent certain interest in the area of novel functional materials. Well-defined ring-like...
Complexes were formed via the electrostatic interaction between 30–50 nm anionic liposomes and a star-shaped polyelectrolyte, poly{[2-(methacryloyloxy)ethyl]trimethyl ammonium iodide}, having cationic arms that radiate from a silicon-based central core. The complexation was investigated with attention given to assessing the capacity of the cationic stars for the anionic liposomes (both liquid and...
Design and synthesis of highly efficient branching agent (“inimer”) to prepare hyperbranched architectures with tunable physical and chemical properties is one of the most challenging and interesting topic to the polymer community. Here, we report the rational design of a new polyhedral oligomeric silsesquioxane (POSS) containing “inimer” and employed in reversible addition-fragmentation chain transfer...
This study reveals the critical importance of dipole–dipole interaction for homopolymers to form self-assembled microspheres in solutions. For the polymers with different side-groups, the self-assembly is induced by gradually adding deionized water into their solutions in N, N-dimethylformamide (DMF). Three of the polymers containing side-groups with the strong dipoles form uniform colloidal spheres...
Self-assembly methods are used for the production of photonic and nanoporous materials derived from block copolymers. In this context, bottle-brush copolymers have demonstrated a number of advantages over the respective linear copolymers, such as faster self-assembly kinetics and a richer morphology behavior. However, the effect of intrinsic molecular stiffness on the morphology of bottle-brush copolymers...
A novel reduction-responsive porphyrin monomer bearing a disulfide bond (TPPC6SAM) was synthesized, and then it was utilized to construct a series of POEGMA-b-PTPPC6SAM block copolymers via reversible addition–fragmentation transfer (RAFT) polymerization with water-soluble and biocompatible monomer, oligo(ethylene glycol) methyl ether methacrylate (OEGMA). POEGMA-b-PTPPC6SAM block copolymers could...
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