Light, Heat, and Force‐Responsive Polyolefins

Advanced Science, Journal Year: 2024, Volume and Issue: 11(11)

Published: Jan. 6, 2024

Abstract Stimuli‐responsive polymers have found applications as shape‐memory materials, optical switches, and sensors, but the installation of these responsive properties in non‐polar inert polyolefins is challenging. In this contribution, a series spiropyran (SP)‐based comonomers are synthesized copolymerized with ethylene or ethylene/cyclic monomers. addition to great mechanical surface properties, functionalized responded light, heat, force, which induced changes polymer structure transmit color signals. These interesting also installed commercial polyolefin materials through reactive extrusion, making scalable production possible.

Language: Английский

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Advanced Functional Spiropyran‐Based Smart Materials with Rapid and Reversible Photochromic Response for Optical Sensing Applications

Advanced Materials Technologies, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Abstract Stimuli‐responsive materials with optical adaptibility to external triggers are versatile for diverse applications. Among these, smart chromic molecular photoswitching enable real‐time absorption changes indications, crucial sensing, security, sensors, authentication, and anti‐counterfeiting This current study presents an intriguing approach develop spiropyran (SP)‐based switches rapid reversible photochromism. Three dual‐responsive functional SPs (f‐SPs) dyes varying SP moieties (1–3) synthesized using straightforward chemical method. The responsiveness of f‐SPs dual stimuli, such as organic solvents polarity light sources different wavelengths (365 530 nm), is investigated. increasing (non‐polar polar) facilitated stabilization merocyanine (MC) isomer. On contrary, upon irradiation sources, exhibited significant, real‐time, highly in color. photochromic reversibility within 20 s increased moieties. Furthermore, incorporated into Polydimethylsiloxane (PDMS) polymer matrix. resulting composite films displayed exceptional photostability, responses, reduced photo fatigue. Additionally, versatility sensing demonstrated by tailoring structural isomerization these photo‐patterning work paves way advanced cutting‐edge

Language: Английский

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Highly Water‐Dispersible Spiropyran‐Octapeptide Supramolecules: Efficient, Multi‐processable, and Versatile Photoswitches for Time‐Dependent Dual‐Mode Encryption

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 16, 2024

Abstract With exceptional photochromic and photoluminescent properties, spiropyrans have demonstrated significant potential for advanced information encryption anti‐counterfeiting applications. However, its inherent water insolubility leads to incompatibility with aqueous polymers, even more, ease of leaching from the matrix hinders formation stable stimuli‐responsive platforms through direct blending all polymers. Here, fabrication amphiphilic spiropyran‐octapeptide molecules is reported that can spontaneously self‐assemble into highly water‐dispersible supramolecular nanofibers in water. These assemblies exhibit universal polymer compatibility while retaining rapid photo‐responsiveness spiropyrans. The strong interactions between assembly chains ensures long‐term stability resultant materials environments. fully preserve base polymers’ processing silk fibroin as offering opportunities constructing photo‐responsive various forms (e.g., films, gels, fibers, coatings) multiple functionalities using diverse solution techniques. Integrating distinct responses within a single format without interference, combined environmental flexibility, enables creation dual‐mode, high‐security devices application scenarios. outlined strategy provides innovative concepts developing high‐performance, versatile intelligent systems utilizing stimulus‐responsive molecules.

Language: Английский

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Robust, Reprocessable and Scalable Ethylene Acrylic Acid Copolymer (EAA) Derived Vitrimer Based on Dual Cross-linked Networks

Journal of Polymers and the Environment, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Language: Английский

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Nickel Catalyst With Excellent Thermal Stability for Ethylene Polymerization and Copolymerization

Applied Organometallic Chemistry, Journal Year: 2025, Volume and Issue: 39(3)

Published: Feb. 12, 2025

ABSTRACT Recently, a series of inexpensive nickel‐based phosphine phenol catalysts have been synthesized for catalyzing the copolymerization ethylene and polar monomers to prepare functionalized polyolefins. However, it is still challenging achieve homogeneous nickel that catalyze polymerization or at high temperatures (up 150°C) with activity. This work bulky steric hindrance electron donating groups, which were used coordination temperatures. These exhibited activity excellent thermal stability 150°C, producing polyethylene molecular weight up 102.7 × 10 4 g mol −1 . More importantly, these can range 120°C, improving surface properties

Language: Английский

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Soft Matter 20th Anniversary Collection: invitation to submit Synergistic Effects of Azobenzene and Thiourea Backbones in Multiresponsive Copolymers for Sensing and Adhesive Technologies

Soft Matter, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Stimuli-responsive polymers have garnered significant attention for their ability to adapt environmental changes, offering applications in sensing, smart coatings, and adaptive devices. However, challenges remain developing multifunctional that combine dynamic responsiveness with robust mechanical properties. In this study, we design synthesize azobenzene-based copolymers, poly(thiourea triethylene glycol)-co-azobenzene (PTUEG3-co-Azo) through a controlled polycondensation process address these limitations. The flexible PTUEG3 backbone, its strong hydrogen-bonding networks, is combined azobenzene moieties impart thermal isomerization, acid-base responsiveness, enhanced adhesion performance. groups exhibited thermally induced cis-to-trans leading structural reorganization, increased molecular packing, elevated glass transition temperatures (Tg). Additionally, the demonstrated reversible undergoing distinct repeatable color changes upon protonation deprotonation. By balancing flexibility of backbone rigidity groups, PTUEG3-co-Azo copolymers achieved performance tunable 4 : 1 composition superior adhesive strength, attributed synergistic effects hydrogen bonding azobenzene-induced reorganization under activation. These results present as versatile material, bridging gap between robustness, potential adhesives, functional coatings.

Language: Английский

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A stable and high-contrast color/fluorescence dual-mode stimuli-responsive poly (imino sulfone) for anti-counterfeiting and encryption

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161511 - 161511

Published: March 1, 2025

Language: Английский

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Manipulating molecular conformation of charge-transfer cocrystal for NIR-II absorption and light/thermal-responsive imaging

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162795 - 162795

Published: April 1, 2025

Language: Английский

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Enhancing the Shape-Memory performance of biocompatible scaffolds based on Chain-Extended Poly(L-Lactide-co-Glycolide-co-Caprolactone) terpolymers

European Polymer Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113998 - 113998

Published: May 1, 2025

Language: Английский

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Mechanochromic Branched Polyethylenes Synthesized through Ring-opening Metathesis Terpolymerization

Chinese Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Language: Английский

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