Cationic RAFT and DT polymerization

Progress in Polymer Science, Год журнала: 2021, Номер 124, С. 101485 - 101485

Опубликована: Ноя. 14, 2021

Язык: Английский

---

A Photoinduced Dual‐Wavelength Approach for 3D Printing and Self‐Healing of Thermosetting Materials

Angewandte Chemie International Edition, Год журнала: 2021, Номер 61(11)

Опубликована: Дек. 3, 2021

Vat photopolymerization-based 3D printing techniques have been widely used to produce high-resolution thermosetting materials. However, the lack of repairability these thermosets leads production waste. In this study, reversible addition fragmentation chain transfer (RAFT) agents are incorporated into resin formulations allow visible light (405 nm) mediated materials with self-healing capabilities. The process is based on reactivation RAFT agent embedded in under UV (365 nm), which enables reformation polymeric network. can be performed at room temperature without prior deoxygenation. impact type and concentration polymer network healing efficiency explored. Resins containing enable properties, broadening scope future applications for various fields.

Язык: Английский

---

Enzyme Catalysis for Reversible Deactivation Radical Polymerization

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(26)

Опубликована: Фев. 25, 2022

Enzyme catalysis has been increasingly utilized in reversible deactivation radical polymerization (Enz-RDRP) on account of its mildness, efficiency, and sustainability. In this Minireview we discuss the key roles enzymes play RDRP, including their ATRPase, initiase, deoxygenation, photoenzyme activities. We use selected examples to highlight applications Enz-RDRP surface brush fabrication, sensing, polymerization-induced self-assembly, high-throughput synthesis. also give our reflections challenges future directions emerging area.

Язык: Английский

---

Polymer Grafting to Polydopamine Free Radicals for Universal Surface Functionalization

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(15), С. 6992 - 7000

Опубликована: Апрель 11, 2022

Modifying surfaces using free radical polymerization (FRP) offers a means to incorporate the diverse physicochemical properties of vinyl polymers onto new materials. Here, we harness universal surface attachment polydopamine (PDA) "prime" range different for polymer attachment, including glass, cotton, paper, sponge, and stainless steel. We show that intrinsic species present in PDA can serve as an anchor point subsequent propagating macroradicals through radical–radical coupling. Leveraging straightforward, twofold soak-wash protocol, FRP over PDA-functionalized results covalent on both porous nonporous substrates, imparting functionalized materials, enhanced hydrophobicity, fluorescence, or temperature responsiveness. Our strategy is then extended covalently nanoparticles into organo-/hydrogels via cross-linking, yielding tunable PDA–polymer composite networks. The propensity radicals quench studied situ 1H nuclear magnetic resonance electron paramagnetic spectroscopy, revealing area-dependent macroradical scavenging mechanism underpins conjugation. By combining arbitrary with broad polymers, our provides straightforward route unlimited functionality practically any surface.

Язык: Английский

---

Multiblock copolymer synthesisviaRAFT emulsion polymerization

Chemical Society Reviews, Год журнала: 2023, Номер 52(10), С. 3438 - 3469

Опубликована: Янв. 1, 2023

Emulsion polymerization mediated by RAFT confers a plenty of advantages for the synthesis multiblock copolymers, including but not limited to control over particle morphology, molecular weight, livingness, composition, and time.

Язык: Английский

---

Xanthate-Based Photoiniferter RAFT Polymerization toward Oxygen-Tolerant and Rapid Living 3D Printing

Macromolecules, Год журнала: 2022, Номер 55(5), С. 1620 - 1628

Опубликована: Фев. 15, 2022

Three-dimensional (3D) printing based on photoinduced reversible addition–fragmentation chain transfer (RAFT) polymerization is emerging as a versatile and powerful method to prepare "living" 3D objects, which can be postmodified with various functionalities. However, an additional photoinitiator or photocatalyst necessary in these systems, toxic will cause negative effects the properties of prepared materials. Here, we report oxygen-tolerant rapid living photoiniferter RAFT polymerization, does not need photoinitiators photocatalysts. A xanthate, O-ethyl-S-2-ethyl propionate, was chosen both agent this process. Various monomers agents were screened system. Materials different utilizing postfunctionalization printed objects. Furthermore, polymer welding proposed by painting fresh between two objects for post-photocuring. This polymerization-based also successfully applied commercial digital light processing technique-based printer, offering facile fabricate materials shapes.

Язык: Английский

---

Polymerization Induced Microphase Separation for the Fabrication of Nanostructured Materials

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(44)

Опубликована: Июль 11, 2023

Polymerization induced microphase separation (PIMS) is a strategy used to develop unique nanostructures with highly useful morphologies through the of emergent block copolymers during polymerization. In this process, are formed at least two chemically independent domains, where one domain composed robust crosslinked polymer. Crucially, synthetically simple method readily nanostructured materials coveted co-continuous morphology, which can also be converted into mesoporous by selective etching domain. As PIMS exploits copolymer mechanism, size each tightly controlled modifying precursors, thus providing unparalleled control over nanostructure and resultant mesopore sizes. Since its inception 11 years ago, has been vast inventory advanced for an extensive range applications including biomedical devices, ion exchange membranes, lithium-ion batteries, catalysis, 3D printing, fluorescence-based sensors, among many others. review, we provide comprehensive overview summarize latest developments in chemistry, discuss utility wide variety relevant applications.

Язык: Английский

---

Advances in the Synthesis of Chemically Recyclable Polymers

Chemistry - An Asian Journal, Год журнала: 2023, Номер 18(3)

Опубликована: Янв. 9, 2023

Abstract The development of modern society is closely related to polymer materials. However, the accumulation materials and their evolution in environment causes not only serious environmental problems, but also waste resources. Although physical processing can be used reuse polymers, properties resulting polymers are significantly degraded. Chemically recyclable a type that degrades into monomers, an effective solution degradation caused by recycling polymers. ideal chemical i. e., quantitative conversion monomers at low energy consumption repolymerization formed with comparable original, attractive research goal. In recent years, significant progress has been made design enabling regulation “polymerization‐depolymerization” equilibrium closed‐loop under mild conditions. This review will focus on following aspects poly(sulfur) esters, polycarbonates, polyacetals, polyolefins, poly(disulfide) polymer, illustrate challenges this area, provide outlook future directions.

Язык: Английский

---

Recent Advances in Antifouling Surface Polymer Brushes

ACS Applied Polymer Materials, Год журнала: 2023, Номер 6(1), С. 1 - 27

Опубликована: Ноя. 30, 2023

Biofouling caused by nonspecific adsorption of biomolecules and organisms such as proteins, cells, bacteria to material surfaces is a significant challenge for numerous important applications. An effective approach addressing this problem coat antifouling polymers on the impart demanded properties repel biological adhesion. In review, we summarized recent advances in surface polymer brushes which have emerged past decade, with focus origin brushes, approaches key factors that impact properties, common used construction applications variety fields.

Язык: Английский

---

Controlling Radical Polymerization with Biocatalysts

Macromolecules, Год журнала: 2023, Номер 56(3), С. 751 - 761

Опубликована: Фев. 3, 2023

Reversible deactivation radical polymerization (RDRP) is a set of powerful and versatile methods for the synthesis well-defined polymers. Over past two decades, engagement biocatalysts, namely, enzymes bacteria, has granted distinctive features to RDRP propelled toward more sustainable future. In this Perspective, we highlight green conditions, oxygen tolerance, function, ability access difficult polymers in conducted by biocatalysis (bio-RDRP), discuss major considerations when conducting bio-RDRP, point out drawbacks bottlenecks that limit its further development. The future bio-RDRP may benefit from expanding biocatalyst library, improving redox potential enhancing robustness, in-depth mechanistic studies.

Язык: Английский

---