Designing Nanostructured 3D Printed Materials by Controlling Macromolecular Architecture DOI
Xiaobing Shi, Valentin A. Bobrin,

Yin Yao

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(35)

Published: June 23, 2022

Abstract Nanostructured polymeric materials play important roles in many advanced applications, however, controlling the morphologies of thermosets remains a challenge. This work uses multi‐arm macroCTAs to mediate polymerization‐induced microphase separation (PIMS) and prepare nanostructured via photoinduced 3D printing. The characteristic length scale microphase‐separated domains is determined by macroCTA arm length, while nanoscale are controlled architecture. Specifically, using 2‐ 4‐ provides with different compared analogous monofunctional linear at similar compositions. mechanical properties these can also be tuned maintaining desired morphologies. Using thus broaden scope accessible nanostructures for extended including fabrication actuators potential drug delivery devices.

Language: Английский

Rational Design of Photocatalysts for Controlled Polymerization: Effect of Structures on Photocatalytic Activities DOI
Chenyu Wu, Nathaniel Corrigan, Chern‐Hooi Lim

et al.

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(6), P. 5476 - 5518

Published: Jan. 4, 2022

Over the past decade, use of photocatalysts (PCs) in controlled polymerization has brought new opportunities sophisticated macromolecular synthesis. However, selection PCs these systems been typically based on laborious trial-and-error strategies. To tackle this limitation, computer-guided rational design knowledge structure-property-performance relationships emerged. These strategies provide rapid and economic methodologies for tuning performance functionality a system, thus providing further polymer science. This review provides an overview employed photocontrolled summarizes their progression from early to current state-of-the-art. Background theories electronic transitions are also introduced establish perspective quantum chemistry. Typical examples each type structure-property then presented enlighten future polymerization.

Language: Английский

Citations

178
Photocontrolled RAFT polymerization: past, present, and future DOI Creative Commons

Yungyeong Lee,

Cyrille Boyer, Min Sang Kwon

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(9), P. 3035 - 3097

Published: Jan. 1, 2023

In this review, we provide a brief history, progress, and applications, discuss the remaining challenges of photocontrolled reversible addition-fragmentation chain transfer (RAFT) polymerization (i.e., photoinduced electron/energy transfer-RAFT (PET-RAFT), photoiniferter, photomediated cationic RAFT polymerization). Among these, visible-light-driven has attracted particular attention in recent years due to its benefits, including low energy consumption safe reaction procedure. Moreover, incorporation visible-light photocatalysis conferred attractive features, such as spatiotemporal control oxygen tolerance; however, clear understanding mechanism not been completely provided. We also present research efforts elucidate mechanisms with aid quantum chemical calculations combined experimental evidence. This review offers an insight into better design systems for desired applications helps realize full potential both academic- industrial-scale applications.

Language: Английский

Citations

140
Recent advances in 3D printing for catalytic applications DOI
Jie Zhu, Peiwen Wu, Yanhong Chao

et al.

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 433, P. 134341 - 134341

Published: Dec. 27, 2021

Language: Английский

Citations

135
Recent Trends in Advanced Photoinitiators for Vat Photopolymerization 3D Printing DOI Creative Commons
Yinyin Bao

Macromolecular Rapid Communications, Journal Year: 2022, Volume and Issue: 43(14)

Published: May 17, 2022

3D printing has revolutionized the way of manufacturing with a huge impact on various fields, in particular biomedicine. Vat photopolymerization-based techniques such as stereolithography (SLA) and digital light processing (DLP) attract considerable attention owing to their superior print resolution, relatively high speed, low cost, flexibility resin material design. As one key element SLA/DLP resin, photoinitiators or photoinitiating systems have experienced significant development recent years, parallel exploration (macro)monomers. The design new cannot only offer faster speed enable low-energy visible fabrication, but also can bring functions printed products even generate methods combination advanced optics. This review evaluates trends application for vat photopolymerization printing, wide range small molecules, polymers, nanoassemblies involved. Personal perspectives current limitations future directions are eventually provided.

Language: Английский

Citations

105
Ultrafast Visible-Light-Induced ATRP in Aqueous Media with Carbon Quantum Dots as the Catalyst and Its Application for 3D Printing DOI
Liang Qiao, Ziqi Zhou, Ge Shi

et al.

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(22), P. 9817 - 9826

Published: May 26, 2022

Photoinduced atom transfer radical polymerization (ATRP) has been proved to be a versatile technique for polymer network formation. However, the slow rates of typical ATRP limited its application in field additive manufacturing (3D printing). In this work, we introduced carbon quantum dots (CQDs) first time aqueous media and developed an ultrafast visible-light-induced system. After optimization, could achieve high monomer conversion (>90%) within 1 min, polydispersity index (PDI) was lower than 1.25. This system then applied as example 3D printing hydrogel through digital light processing (DLP), printed object exhibited good dimensional accuracy. Additionally, excellent stable optical properties CQDs also provided interesting photoluminescence capabilities objects. We deduce mediated process would provide new platform preparation functional stimuli-responsive materials.

Language: Английский

Citations

81
3D-printed liquid metal polymer composites as NIR-responsive 4D printing soft robot DOI Creative Commons
Liwen Zhang, Xumin Huang, Tim Cole

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Nov. 28, 2023

Abstract 4D printing combines 3D with nanomaterials to create shape-morphing materials that exhibit stimuli-responsive functionalities. In this study, reversible addition-fragmentation chain transfer polymerization agents grafted onto liquid metal nanoparticles are successfully employed in ultraviolet light-mediated stereolithographic and near-infrared light-responsive printing. Spherical directly prepared 3D-printed resins via a one-pot approach, providing simple efficient strategy for fabricating metal-polymer composites. Unlike rigid nanoparticles, the soft nature of reduces glass transition temperature, tensile stress, modulus materials. This approach enables photothermal-induced composites, as demonstrated by programmed shape memory composites rapidly recovering their original 60 s under light irradiation. work provides perspective on use printing, showcasing potential application field robots.

Language: Английский

Citations

49
Tunable afterglow for mechanical self-monitoring 3D printing structures DOI Creative Commons
Rongjuan Huang,

Yunfei He,

Juan Wang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 21, 2024

Abstract Self-monitoring materials have promising applications in structural health monitoring. However, developing organic afterglow for self-monitoring is a highly intriguing yet challenging task. Herein, we design two molecules with twisted donor-acceptor-acceptor’ configuration and achieve dual-emissive tunable lifetimes (86.1–287.7 ms) by doping into various matrices. Based on photosensitive resin, series of complex structures are prepared using 3D printing technology. They exhibit lifetime Young’s Modulus manipulating the photocuring time humidity level. With sufficient or dry conditions, long-lived bright green without apparent deformation under external loading realized. We demonstrate that mechanical properties can be well monitored controlling humidity, quantitively manifested lifetimes. This work casts opportunities constructing flexible devices sensing real-time detection.

Language: Английский

Citations

19
2D Porphyrinic Metal–Organic Framework Nanosheets as Multidimensional Photocatalysts for Functional Materials DOI
Liwen Zhang,

Gervase Ng,

Natasha Kapoor‐Kaushik

et al.

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(42), P. 22664 - 22671

Published: July 29, 2021

Abstract Ultrathin porphyrinic 2D MOFs, ZnTCPP nanosheets (TCPP: 5,10,15,20‐(tetra‐4‐carboxyphenyl) porphyrin) were employed as heterogeneous photocatalysts to activate PET‐RAFT polymerization under various wavelengths ranging from violet orange light. High rates, oxygen tolerance, and precise temporal control achieved. The polymers showed narrow molecular weight distributions good chain‐end fidelity. applied in stereolithographic 3D printing an open‐air environment blue light yield well‐defined printed objects. Apart providing efficient catalytic system, reinforced the mechanical properties of materials. presence embedded materials conferred effective antimicrobial activity visible by production singlet oxygen, affording 98 % 93 anti‐bacterial efficiency against Gram‐positive Gram‐negative bacteria, respectively.

Language: Английский

Citations

78
Efficient 3D printing via photooxidation of ketocoumarin based photopolymerization DOI Creative Commons
Xiaoyu Zhao, Ye Zhao, Ming‐De Li

et al.

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: May 17, 2021

Abstract Photopolymerization-based three-dimensional (3D) printing can enable customized manufacturing that is difficult to achieve through other traditional means. Nevertheless, it remains challenging efficient 3D due the compromise between print speed and resolution. Herein, we report an approach based on photooxidation of ketocoumarin functions as photosensitizer during photopolymerization, which simultaneously deliver high (5.1 cm h −1 ) resolution (23 μm) a common printer. Mechanistically, initiating radical deethylated are both generated upon visible light exposure, with former giving rise rapid photopolymerization while latter ensuring by confining penetration. By comparison, printed feature hard identify when encounters photoreduction increased lateral photopolymerization. The proposed here provides viable solution towards additive controlling photoreaction photosensitizers

Language: Английский

Citations

71
Nanostructure Control in 3D Printed Materials DOI Creative Commons
Valentin A. Bobrin,

Kenny Lee,

Jin Zhang

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(4)

Published: Nov. 6, 2021

Currently, there are no straightforward methods to 3D print materials with nanoscale control over morphological and functional properties. Here, a novel approach for the fabrication of controlled morphologies using rapid commercially available Digital Light Processing printing technique is demonstrated. This process exploits reversible deactivation radical polymerization in-situ-polymerization-induced microphase separation resins, which provides complex architectures controllable from macro- nanoscale, resulting in preparation enhanced mechanical method does not require specialized equipment or conditions thus represents an important development production advanced via additive manufacturing.

Language: Английский

Citations

69