Kinetic topology‐selective encapsulation and mixture separation by a nanocapsule with hyperbranched polyethylenimine as core and polystyrene as shell

Jin, Ming; Liu, Honghai; Pu, Hongting; Wan, Decheng

doi:10.1002/polb.23329

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…With diameter ranging from 1 to 100 nm, nanocarriers can be utilized to transport a variety of guest molecules, including dyes, , imaging agents, drugs, and catalysts . There are basically two strategies for the formation of nanocarriers from the macromolecules: (1) the self-assembly of the amphiphilic block copolymers and (2) the direct synthesis of the amphiphilic dendritic polymers with core–shell structures. ,, The synthesis of amphiphilic dendritic polymers is usually started with the functionalization of dendrimers or hyperbranched polymers via covalent bond formation followed by several purification steps . The amphiphilic SDMPs from the self-assembly of dendritic polymer and linear polymers, which can be easily prepared, have also been reported for nanocarrier applications .…”

Section: Resultsmentioning

confidence: 99%

A Supramolecular Polyethylenimine-Cored Carbazole Dendritic Polymer with Dual Applications

et al. 2015

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A series of supramolecular dendritic multiarm polymers (SDMPs) are fabricated by simply mixing the hyperbranched polyethylenimine (PEI, 10K) and carboxylic acid-terminated carbazolecontaining dendrons. Carbazole-containing dendrons with different generations, i.e. generation zero (G0), generation one (G1), and generation two (G2), are employed for the formation of the nanocomplexes. The formation of SDMPs is demonstrated by the use of dynamic light scattering (DLS) and water contact angle (WCA) measurement. The ionic bonding between the PEIs and the surrounding carbazole-containing dendrons is also confirmed by the 1 H nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectra. The encapsulation capability of SDMPs is tested by monitoring the phase transfer process of anionic guests by UV−vis spectroscopy. The effect of the dendron generation on the encapsulation capability of SDMPs is evaluated as well. Without any additional reducing agent, the SDMPs are also utilized as the nanoreactors for the formation of the noble metal nanoparticle (NMNPs) while cross-linking the periphery carbazole shells simultaneously. The electrochemically active SDMPs, with the simple fabrication method and their utilization as the nanocarriers to encapsulate anionic guests and nanoreactors to generate conjugated polymer shells surrounded NMNPs, are expected to be ideal building blocks for the optoelectronic devices and intelligent materials. ■ INTRODUCTIONBy analogue with biomolecules that self-organize into the welldefined 3-D hierarchical structures with unique properties and functionalities, the synthesized polymers can also be programmed to self-assemble into functional supramolecular nanoobjects, i.e., supramolecular polymers (SPs). 1−4 The SPs have attracted broad interest in both academic and industrial fields due to their broad applications in catalysis, 5 drug delivery, 2,6 nanopattern fabrication, 7 information storage, 8 actuators, 9 liquid crystals, 10,11 self-healing material, 12,13 and optoelectronic devices. 14 Compared with the covalently bonded polymers, they enjoyed several advantages, such as simple preparation and purification, tunable structure and morphology, and stimulus response. 15 With a three-dimensional global architecture, supramolecular dendritic polymers (SDPs) exhibit good solubility, lower solution viscosity, and higher degree of functionality than their linear analogues. 15 With one multifunctional dendritic polymer as core and numerous linear polymers or dendrons with one complementary unit as shells, supramolecular dendritic multiarm copolymers (SDMPs) usually possess two chemically distinct components. As a unique class of SDPs, SDMPs exhibit great potentials in drug delivery, 2,16 templated polymerization, 17 nanoparticle formation, 18,19 and catalysis. 5 The dendritic polymer and surrounding linear polymers or dendrons are held together by the secondary interactions, such as hydrogen bonding, 14 electrostatic interactions, 18,20 and host−guest complexation. 21 The ionic bond...

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Section: Resultsmentioning

confidence: 99%

A Supramolecular Polyethylenimine-Cored Carbazole Dendritic Polymer with Dual Applications

et al. 2015

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“…Molecular transport by a polymeric micelle (PM) has received much attention because of potential applications in molecular delivery and controlled release . Recently, this technique has found applications in mixture separation . Generally speaking, a PM can entrap a wide spectrum of guest species but the guest selectivity is relatively poor.…”

Section: Introductionmentioning

confidence: 99%

Charge‐selective separation and recovery of organic ions by polymeric micelles

Wan

Jin

2014

J Polym Sci B Polym Phys

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Charge-selective separation and recovery of organic ionic dyes by polymeric micelles (PMs) are reported. Branched polyethylenimine (PEI) functionalized with 4-cetyloxybenzaldehyde (CBA) via Schiff-base bonds (PEI@CBA) can extract an anionic dye from cationic contaminants, and transfer it from an aqueous phase into an apolar oil phase, and thus leading to separation. While a physical micelle of PAA@PS, with polyacrylic acid (PAA) as core and polystyrene (PS) as shell, can selectively extract a cationic dye from anionic contaminants. When polar, yet nonionic groups are eliminated from the core of a PM, charge selectivity can be significantly enhanced. Although many anionic-cationic dyes can form a poorly water-soluble complex or precipitate, separation is still feasible with a reasonably designed PM. Finally, entrapment of a guest by a PM is found easy but release may be difficult; in this case, PEI@CBA with an acid-sheddable shell, can recover the entrapped guest. It is also found the encapsulation of a dye is usually accompanied with dye stacking, resulting in a changed UV/vis spectrum.

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