Photoinduced Free Radical Promoted Cationic RAFT Polymerization toward “Living” 3D Printing

Published on Oct 19, 2021in ACS Macro Letters6.903
· DOI :10.1021/ACSMACROLETT.1C00555
Bowen Zhao (Soochow University (Suzhou)), Jiajia Li6
Estimated H-index: 6
(Soochow University (Suzhou))
+ 3 AuthorsJian Zhu40
Estimated H-index: 40
(Soochow University (Suzhou))
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Abstract
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References34
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#1Yi Zhu (Jiangnan University)H-Index: 2
#2Dandan Xu (Jiangnan University)H-Index: 2
Last. Ren Liu (Jiangnan University)H-Index: 25
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A novel broad-wavelength-absorbing photoinitiator based on phenacyl phenothiazinium hexafluroantimonate (P-PTh) possessing both phenacyl and phenothiazine chromophoric groups was reported. P-PTh absorbs light at UV, Visible and Near-IR region. Photophysical, photochemical, and computational investigations revealed that P-PTh in solution decomposes at all wavelengths by homolytic and heterolytic cleavages and generates cationic and radical species, which could efficiently initiate cationic and fr...
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#1Ali Bagheri (UNE: University of New England (Australia))H-Index: 15
#2Honglei Ling (University of Auckland)H-Index: 1
Last. Jianyong Jin (University of Auckland)H-Index: 26
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#1Masamichi Inoue (Osaka University)H-Index: 1
#2Arihiro Kanazawa (Osaka University)H-Index: 16
Last. Sadahito Aoshima (Osaka University)H-Index: 40
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#1Jiajia LiH-Index: 6
#2Andrew KerrH-Index: 6
Last. Sébastien PerrierH-Index: 69
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We present a robust manganese-catalyzed cationic reversible addition–fragmentation chain transfer (RAFT) polymerization induced by visible light. Well-defined poly(vinyl ether)s with controlled mol...
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#1Yulian PangH-Index: 5
#2Atsushi ShiraishiH-Index: 4
Last. Bernd StrehmelH-Index: 26
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NIR-sensitized cationic polymerization proceeded with good efficiency, as was demonstrated with epoxides, vinyl ether, and oxetane. A heptacyanine functioned as sensitizer while iodonium salt served as coinitiator. The anion adopts a special function in a series selected from fluorinated phosphates (a: [PF6 ]- , b: [PF3 (C2 F5 )3 ]- , c: [PF3 (n-C4 F9 )3 ]- ), aluminates (d: [Al(O-t-C4 F9 )4 ]- , e: [Al(O(C3 F6 )CH3 )4 ]- ), and methide [C(O-SO2 CF3 )3 ]- (f). Vinyl ether showed the best cationi...
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#5Wei Zhang (Soochow University (Suzhou))H-Index: 55
A near-infrared (NIR) light induced controlled cationic polymerization is presented here. The halide abstraction reaction between the cyclopentadienyl iron dicarbonyl dimer (Fe2(Cp)2(CO)4) and an o...
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#1Daisuke Hotta (Osaka University)H-Index: 2
#2Arihiro Kanazawa (Osaka University)H-Index: 16
Last. Sadahito Aoshima (Osaka University)H-Index: 40
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tert-Butyl esters are demonstrated to function as chain transfer agents (CTAs) in the cationic copolymerization of vinyl ether (VE) and oxirane via concurrent vinyl-addition and ring-opening mechanisms. In the copolymerization of isopropyl VE and isobutylene oxide (IBO), the IBO-derived propagating species reacts with tert-butyl acetate to generate a copolymer chain with an acetoxy group at the ω-end. This reaction liberates a tert-butyl cation; hence, a polymer chain with a tert-butyl group at ...
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#1Chris William Anderson Bainbridge (University of Auckland)H-Index: 4
#2Kyle Edward Engel (University of Auckland)H-Index: 3
Last. Jianyong Jin (University of Auckland)H-Index: 26
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4D printing has steadily become an emerging area of advanced manufacturing research and has produced some truly fantastic innovations. Previously we have demonstrated the 3D printing process based on PET-RAFT polymerization, and its subsequent capability in the post-production modification of surface properties. In this work, (1) we further optimized the PET-RAFT 3D printing formulation by replacing RAFT agent CDTPA with BTPA and adjusting the monomer composition; (2) we also observed the photod...
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#1Claire Yu (UCSD: University of California, San Diego)H-Index: 15
#2Jacob Schimelman (UCSD: University of California, San Diego)H-Index: 6
Last. Shaochen ChenH-Index: 62
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Since the advent of additive manufacturing, known commonly as 3D printing, this technology has revolutionized the biofabrication landscape and driven numerous pivotal advancements in tissue enginee...
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#1Jiajia Li (Soochow University (Suzhou))H-Index: 6
#2Andrew Kerr (Warw.: University of Warwick)H-Index: 6
Last. Jian Zhu (Soochow University (Suzhou))H-Index: 40
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The manganese carbonyl induced cationic reversible addition-fragmentation chain transfer (C-RAFT) polymerization under mild conditions such as visible light, room temperature and even in the presence of small quantities of water is reported. In this method, halide abstraction reaction between organic halide and manganese carbonyl is used to generate the oxidant and initiate radicals. The C-RAFT agents are generated in-situ from radical transfer reactions between vinyl ethers and three traditiona...
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