Amphiphilic hyperbranched polymers: synthesis, characterization and self-assembly performance

Abstract

A series of amphiphilic hyperbranched polymers (AHP-s, the "s" refers to the algebra of AHP) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP-s, the "s" refers to the algebra of HBP) and palmitoyl chloride. FTIR, NMR and GPC were used to determine the structure of AHP-s, the results showed that AHP-s exhibits core-shell structure. The thermal properties of polymers were investigated by DSC and TGA. It was found that AHP-2, AHP-3 and AHP-4 display higher thermal stability than AHP-1 (AHP-1, AHP-2, AHP-3 and AHP-4 represent the first, second, third and fourth generation AHP, respectively). Furthermore, the self-assembly performance of AHP-s in THF solvent was investigated by TEM and SEM. Finally, the encapsulation capacity of the AHP-s for methyl orange (MO) was explored at different concentrations of AHP-s and pH conditions. It was found that AHP-s is capable of accommodating hydrophilic guest MO. Moreover, the higher generation of AHP-s, the stronger encapsulation capacity obtained. And the encapsulation capacity closely associated with the pH of encapsulation system.

Micro‐interfacial polymerization of porous PEDOT for printable electronic devices

“…FeCl 3 ·6H 2 O is a readily available oxidant that can initiate the polymerization of EDOT and is also an ideal hydrogen bond acceptor for DES 25 . Through theoretical analysis and experimental verification, we found that substances such as organic acids (oxalic acid and lactic acid), alcohols (ethylene glycol), and amides (urea 26 and acetamide) can act as hydrogen bond donors with FeCl 3 ·6H 2 O to construct a liquid DES system for EDOT polymerization (Figure S1, Supporting Information). Comparing these DES systems in terms of reaction rate, yield, and structural morphology of PEDOT, we find that the DES system composed of FeCl 3 ·6H 2 O and acetamide is the best for the polymerization of EDOT into PEDOT with a longer molecular chain and better crystallization (Figure S1).…”

“…FeCl 3 Á6H 2 O is a readily available oxidant that can initiate the polymerization of EDOT and is also an ideal hydrogen bond acceptor for DES. 25 Through theoretical analysis and experimental verification, we found that substances such as organic acids (oxalic acid and lactic acid), alcohols (ethylene glycol), and amides (urea 26 and acetamide) can act as hydrogen bond donors with FeCl 3 Á6H 2 O to construct a liquid DES system for EDOT polymerization (Figure S1, Supporting Information).…”

The Synthesis of Nonionic Hyperbranched Organosilicone Surfactant and Characterization of Its Wetting Ability

“…The peaks at 340.5 and 372.7 were the main peaks, also some small peak appeared, too. So, some reactants were in the samples [23]. The Mn of HBP-OH were 340.5 and 372.7.…”

Controllable and Reversible Assembly of Nanofiber from Natural Macromolecules via Protonation and Deprotonation

“…Supramolecular assembly is a powerful tool and delicate technique to access a great variety of nano structures for functional materials. Supramolecular assembly into highly organized soft architectures through noncovalent interactions (e.g., hydrogen bonding, electrostatic interaction, 𝜋-𝜋 interaction, host-guest interaction, and metal ligand coordination) is the most common phenomenon for various biological functions in living systems like nanofibers or fibrils, [1][2][3][4][5] DNA, [6] cellular membranes, [7] and enzymes, [8] etc. The functions of these structures are often realized by reversible or dynamical assembly among components in response to condition change, [9][10][11] such as the deformation of macrophages for phagocytosis, [12] the division of DNAbased cytoskeleton, [13,14] and dynamically morphological regulate of organelles.…”