Macromolecular Rapid Communications

Wiley Online Library : Macromolecular Rapid Communications

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Influence of Chemical and Physical Change of Pollen Microgels on Swelling/De‐Swelling Behavior

Sunflower pollen grains are transformed into soft materials, pollen microgels, for high processability by the soapmaking method. The physical and chemical properties of the sunflower pollen microgel are investigated for different potassium hydroxide concentrations and incubation times. Abstract Pollen, the male microgametophyte of seed plants,...

Native Structure of the Plant Cell Wall Utilized for Top‐Down Assembly of Aligned Cellulose Nanocrystals into Micrometer‐Sized Nanoporous Particles

Covalent crosslinking of hydrolyzed cellulosic fibers preserves the morphology of the fiber cell wall, resulting in micrometer‐sized, nanoporous particles that consist of aligned, end‐to‐end connected cellulose nanocrystals. Abstract Despite their sustainable appeal, biomass components are currently undervalued in nanotechnology because means...

pH‐Controlled Hierarchical Assembly/Disassembly of Multicompartment Micelles in Water

An ABC triblock terpolymer is synthesized by reversible addition‐fragmentation chain‐transfer polymerization that assembles into pH‐responsive multicompartment micelles (MCMs) in aqueous solution via a hierarchical self‐assembly process. Tuning the pH allows for a transition between MCMs and unimolecular polymer chains. MCMs are further labeled with...

Fabrication of 2D Block Copolymer Brushes via a Polymer‐Single‐Crystal‐Assisted‐Grafting‐to Method

A recently developed “polymer‐single‐crystal‐assisted‐grafting‐to” method is applied for the preparation of block copolymer brushes on flat glass surfaces. Poly(ethylene oxide)‐b‐poly(l ‐lactide) diblock copolymer brushes are obtained by chemical grafting of triblock copolymer poly(ethylene oxide)‐b‐poly(l ‐lactide)‐b‐poly(3‐(triethoxysilyl)propyl methacrylate)...

Nano–Micro Dimensional Structures of Fiber‐Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

Fiber‐shaped halide perovskite composites offer excellent luminescent properties with color tunability and emission efficiency for optoelectronic and photonic applications. In addition, composite fibers possess high ambient and mechanical stability, promoting their applications in stretchable/flexible devices. This review highlights the fabrication,...

On Demand Light‐Degradable Polymers Based on 9,10‐Dialkoxyanthracenes

Light stability and the possibility of degradation in the presence of singlet oxygen and visible light is realized by a novel class of backbone‐degradable polymers containing 9,10‐dialkoxyanthracene units in the polymer backbone. The degradation can be observed with confocal microscopy on fibers fabricated from this polymer and is confirmed by NMR and...

Development of A Thermo‐Responsive Conjugated Polymer with Photobleaching‐Resistance Property and Tunable Photosensitizing Performance

A conjugated polymer grafted with poly(N‐isopropylacrylamide) (PNIPAAm) is achieved by atom transfer radical polymerization from the side chains of a polyfluorene derivative. The polymer exhibits a reversible thermal‐responsive phase transition. The polymer shows high photostability under UV light irradiation especially above lower critical solution...

Electromechanically Active As‐Electrospun Polystyrene Fiber Mat: Significantly High Quasistatic/Dynamic Electromechanical Response and Theoretical Modeling

A large electromechanical response of as‐electrospun fiber mats composed of a commodity polymer, atactic polystyrene, is demonstrated. The fiber mat apparently shows a high effective converse piezoelectric constant of >30 000 pm V−1 under static measurement conditions and ≈13 000 pm V−1 at 1 kHz. A theoretical model is constructed to explain the...

Design Rationale for Stimuli‐Responsive, Semi‐interpenetrating Polymer Network Hydrogels–A Quantitative Approach

Based on a model semi‐interpenetrating polymer network hydrogel system, a systematic and quantitative study on linear polymer retention within a thermally responsive crosslinked polymeric network is explored. The study provides insight on the affecting design parameters, both structural and synthetic. By the determination of kinetic swelling/deswelling...

Dynamic Covalent Chemistry Enables Reconfigurable All‐Polysaccharide Nanogels

The design of the first dynamic nanogels made entirely of polysaccharides (PS) is reported. Based on reversible covalent cross‐linking between chemical partners grafted on different PS chains, these reconfigurable nanogels are easily prepared, stable for a long time, pH responsive, and efficiently internalized by cancer cells. Abstract Dynamic...

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