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Kim D, Kim H, Jeon W, Kim HJ, Choi J, Kim Y, Kwon MS. Ultraviolet Light Debondable Optically Clear Adhesives for Flexible Displays through Efficient Visible-Light Curing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309891. [PMID: 38146993 DOI: 10.1002/adma.202309891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 12/19/2023] [Indexed: 12/27/2023]
Abstract
With growing sustainability concerns, the need for products that facilitate easy disassembly and reuse has increased. Adhesives, initially designed for bonding, now face demands for selective removal, enabling rapid assembly-disassembly and efficient maintenance across industries. This need is particularly evident in the display industry, with the rise of foldable devices necessitating specialized adhesives. A novel optically clear adhesive (OCA) is presented for foldable display, featuring a unique UV-stimulated selective removal feature. This approach incorporates benzophenone derivatives into the polymer network, facilitating rapid debonding under UV irradiation. A key feature of this method is the adept use of visible-light-driven radical polymerization for OCA film fabrication. This method shows remarkable compatibility with various monomers and exhibits orthogonal reactivity to benzophenone, rendering it ideal for large-scale production. The resultant OCA not only has high transparency and balanced elasticity, along with excellent resistance to repeated folding, but it also exhibits significantly reduced adhesion when exposed to UV irradiation. By merging this customized formulation with strategically integrated UV-responsive elements, an effective solution is offered that enhances manufacturing efficiency and product reliability in the rapidly evolving field of sustainable electronics and displays. This research additionally contributes to eco-friendly device fabrication, aligning with emerging technology demands.
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Affiliation(s)
- Daewhan Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hongdeok Kim
- Department of Mechanical Design Engineering, Hanyang University, Seoul, 04763, Republic of Korea
- Department of Mechanical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan, 15588, Republic of Korea
| | - Woojin Jeon
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyun-Joong Kim
- Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul, 08826, Republic of Korea
| | - Joonmyung Choi
- Department of Mechanical Design Engineering, Hanyang University, Seoul, 04763, Republic of Korea
- Department of Mechanical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan, 15588, Republic of Korea
| | - Youngdo Kim
- Mobile Display Module Development Team, Samsung Display Co., Ltd., Cheonan, 31086, Republic of Korea
| | - Min Sang Kwon
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
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2
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Hu N, Shu L, Zheng X, Deng Z, Cang X. A review of modification methods, joints and self-healing methods of adhesive for aerospace. Sci Prog 2024; 107:368504241242271. [PMID: 38651334 PMCID: PMC11036934 DOI: 10.1177/00368504241242271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
In recent years, the adhesive technology has been widely used in the production of high-strength joins and precise positioning of various materials, such as metals, glass and composite materials. The adhesive technology has become a promising assembly process in the aerospace field due to its versatility, low creep and high damage tolerance. However, the reliability and predictability of adhesive bonding still require further development due to the complex operating conditions involved. Therefore, this article reviews and discusses the latest advances in aerospace adhesive technology, such as methods for improving bonding performance, bonding techniques (including joints structure and failure modes) and self-healing adhesive layers. Additionally, the current research results are summarised, and possible development trends and research directions in the field of adhesive bonding are prospected.
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Affiliation(s)
- Ning Hu
- School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Linsen Shu
- School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Xiangke Zheng
- Chinese Academy of Sciences, Xi’an Institute of Optics and Fine Mechanics, Xi’an, People’s Republic of China
| | - Zhifeng Deng
- School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong, People’s Republic of China
| | - Xinyu Cang
- School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, People’s Republic of China
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3
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Wang J, Dong Z, Chen J, Chen S. Preparation of UV Debonding Acrylate Adhesives by a Postgrafting Reaction. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5911. [PMID: 37687603 PMCID: PMC10488351 DOI: 10.3390/ma16175911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/18/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023]
Abstract
UV debonding acrylate adhesive (UDAA) plays a crucial role in the semiconductor industry, where its excellent adhesion is required to ensure the stability of silicon wafers and leave no residue on the surface after UV irradiation. The necessary UV debonding is achieved through the formation of rigid networks by the reactions of all the vinyl groups in the system. Acrylate copolymers with vinyl groups are typically obtained by the grafting reaction of isocyanate with a side-chain hydroxyl comonomer. However, these grafting reactions easily fail due to early cross-link formation. In this study, we illustrate a straightforward method for preparing UDAA by conducting a postgrafting reaction after one-step mixing of isocyanate functional monomer (IPDI-H) and hydroxyl acrylate copolymers (BA-H), thereby skipping the abovementioned vinyl grafting process. The chemical structures of the synthesized IPDI-H and BA-H were confirmed using Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H-NMR) analysis. Gel permeation chromatography (GPC) was employed to determine their molecular weights, while differential scanning calorimetry (DSC) was used to determine their glass transition temperatures. The postgrafting reactions successfully introduced vinyl groups onto the polyacrylate copolymer chains, resulting in high bonding strength during use and a significant decrease in peeling strength after UV irradiation. Rheological methods, including the three-interval thixotropy test (3ITT) and tack test modes, were employed to characterize a series of acrylate UV debonding adhesives. The recovery percentage of the storage modulus in the 3ITT mode indicated that a 0.6 wt% isocyanate curing agent made the UV debonding adhesives resistant to deformation. From the maximum normal force in the tack test mode, it was found that UDAA with 10 wt% PETA monomer and 30 wt% C5 tackifying resin exhibited excellent combined adhesion and debonding properties, which were further confirmed by peel strength tests. Microscope images of the wafer surfaces after removing the adhesive tapes demonstrated the excellent UV debonding properties achieved after 40 s of UV irradiation through the postgrafting reaction. The prepared UDAA has excellent properties; the peel strength can reach 15 N/25 mm before UV irradiation and can be reduced to 0.5 N/25 mm after ultraviolet irradiation. This research establishes a comprehensive method for understanding and applying UDAA in various applications.
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Affiliation(s)
- Juan Wang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Zhikai Dong
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Jingwen Chen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Shuangjun Chen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
- Suqian Advanced Materials Institute, Nanjing Tech University, Suqian 223800, China
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4
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Dynamic cross-linked polyurethane hot-melt adhesive with high biomass content and high adhesive strength simultaneously. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Synthesis and Evaluation of a Silver Nanoparticle/Polyurethane Composite That Exhibits Antiviral Activity against SARS-CoV-2. Polymers (Basel) 2022; 14:polym14194172. [PMID: 36236120 PMCID: PMC9571720 DOI: 10.3390/polym14194172] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/15/2022] [Accepted: 09/21/2022] [Indexed: 11/13/2022] Open
Abstract
In this proof-of-concept study, we aim to produce a polyurethane (PU)-based composite that can reduce the amount of viable SARS-CoV-2 virus in contact with the surface of the polymeric film without further interventions such as manual cleaning. Current protocols for maintaining the hygiene of commonly used touchpoints (door handles, light switches, shop counters) typically rely on repeated washing with antimicrobial products. Since the start of the SARS-CoV-2 pandemic, frequent and costly surface sanitization by workers has become standard procedure in many public areas. Therefore, materials that can be retrofitted to touchpoints, yet inhibit pathogen growth for extended time periods are an important target. Herein, we design and synthesise the PU using a one-pot synthetic procedure on a multigram scale from commercial starting materials. The PU forms a robust composite thin film when loaded with 10 wt% silver nanoparticles (AgNPs). The addition of AgNPs increases the ultimate tensile strength, modules of toughness and modulus of elasticity at the cost of a reduced elongation at break when compared to the pristine PU. Comparative biological testing was carried out by the addition of pseudotyped virus (PV) bearing the SARS-CoV-2 beta (B.1.351) VOC spike protein onto the film surfaces of either the pristine PU or the PU nanocomposite. After 24 h without further human intervention the nanocomposite reduced the amount of viable virus by 67% (p = 0.0012) compared to the pristine PU treated under the same conditions. The significance of this reduction in viable virus load caused by our nanocomposite is that PUs form the basis of many commercial paints and coatings. Therefore, we envisage that this work will provide the basis for further progress towards producing a retrofittable surface that can be applied to a wide variety of common touchpoints.
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Sutyak K, Iezzi EB, Daniels GC, Camerino E. Hydrolytically Stable and Thermo-Mechanically Tunable Poly(Urethane) Thermoset Networks that Selectively Degrade and Generate Reusable Molecules. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22407-22417. [PMID: 35503369 PMCID: PMC9242536 DOI: 10.1021/acsami.2c00485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 04/18/2022] [Indexed: 06/14/2023]
Abstract
Cross-linked polymeric networks that possess tunable properties and degrade on-demand have broad applications in today's society. Herein, we report on silyl-containing poly(urethane) (silyl-PU) thermoset networks, which are highly cross-linked stimuli-responsive materials with hydrolytic stability at 37.7 °C and 95% relative humidity, thermal stability of 280-311.2 °C, tensile properties of 0.38-51.7 MPa strength and 73.7-256.4% elongation, including storage modulus of 2268-3499 MPa (in the glassy state). However, unlike traditional (i.e., nondegradable) PU thermosets, these silyl-PUs selectively activate with fluoride ion under mild and static conditions to completely degrade, via cascading bond cleavages, and generate recoverable and reusable molecules. Silyl-PUs, as thin films, also demonstrated complete removal (within 30 min) from a strongly adhered epoxy thermoset network without altering the structure of the latter. Silyl-PU thermosets have potential applications in composite parts, vehicle and industrial coatings, and rigid plastics for personal devices, and may reduce environmental waste compared to nondegradable, single-use materials.
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Affiliation(s)
- Keith
B. Sutyak
- ASEE
Post-Doctoral Fellow, U.S. Naval Research
Laboratory, Chemistry Division, Washington, DC 20375, United States
| | - Erick B. Iezzi
- U.S.
Naval Research Laboratory, Chemistry Division, Washington, DC 20375, United States
| | - Grant C. Daniels
- U.S.
Naval Research Laboratory, Chemistry Division, Washington, DC 20375, United States
| | - Eugene Camerino
- U.S.
Naval Research Laboratory, Chemistry Division, Washington, DC 20375, United States
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7
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O'Donnell A, Salimi S, Hart L, Babra T, Greenland B, Hayes W. Applications of supramolecular polymer networks. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Gavriel A, Sambrook M, Russell AT, Hayes W. Recent advances in self-immolative linkers and their applications in polymeric reporting systems. Polym Chem 2022. [DOI: 10.1039/d2py00414c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interest in self-immolative chemistry has grown over the past decade with more research groups harnessing the versatility to control the release of a compound from a larger chemical entity, given...
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9
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Kim M, Lee H, Krecker MC, Bukharina D, Nepal D, Bunning TJ, Tsukruk VV. Switchable Photonic Bio-Adhesive Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2103674. [PMID: 34476859 DOI: 10.1002/adma.202103674] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/25/2021] [Indexed: 06/13/2023]
Abstract
A soft photonic bio-adhesive material is designed with real-time colorimetrical monitoring of switchable adhesion by integrating a responsive bio-photonic matrix with mobile hydrogen-binding networking. Synergetic materials sequencing creates a unique iridescent appearance directly coupled with both adhesive ability and shearing strength, in a highly reversible manner. The responsive photonic materials, having a physically hydrogen-bonded chiral nematic organization, vary their adhesion strength due to a transition in cohesive and interfacial failure mechanism in humid surroundings. The bright color appearance shifts from blue to red to transparent and back due to a change in pitch length of the chiral helicoidal organization that also triggers coupled changes in both mechanical strength and interfacial adhesion. Such reversible strength-adhesion-iridescence triple-coupling phenomenon is further explored for design of super-strong switchable bio-adhesives for synthetic/biological surfaces with quick remotely triggered sticky-to-nonsticky transitions, removable conformal soft stickers, and wound dressings with visual monitoring of the healing process, to colorimetric stickers for contaminated respiratory masks.
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Affiliation(s)
- Minkyu Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Hansol Lee
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Michelle C Krecker
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Daria Bukharina
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Dhriti Nepal
- Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, 45433, USA
| | - Timothy J Bunning
- Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, 45433, USA
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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10
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Gavriel AG, Leroux F, Khurana GS, Lewis VG, Chippindale AM, Sambrook MR, Hayes W, Russell AT. Self-Immolative System for Disclosure of Reactive Electrophilic Alkylating Agents: Understanding the Role of the Reporter Group. J Org Chem 2021; 86:10263-10279. [PMID: 34292742 PMCID: PMC8389931 DOI: 10.1021/acs.joc.1c00996] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The development of
stable, efficient chemoselective self-immolative
systems, for use in applications such as sensors, requires the optimization
of the reactivity and degradation characteristics of the self-immolative
unit. In this paper, we describe the effect that the structure of
the reporter group has upon the self-immolative efficacy of a prototype
system designed for the disclosure of electrophilic alkylating agents.
The amine of the reporter group (a nitroaniline unit) was a constituent
part of a carbamate that functioned as the self-immolative unit. The
number and position of substituents on the nitroaniline unit were
found to play a key role in the rate of self-immolative degradation
and release of the reporter group. The position of the nitro substituent
(meta- vs para-) and the methyl
groups in the ortho-position relative to the carbamate
exhibited an influence on the rate of elimination and stability of
the self-immolative system. The ortho-methyl substituents
imparted a twist on the N–C (aromatic) bond leading to increased
resonance of the amine nitrogen’s lone pair into the carbonyl
moiety and a decrease of the leaving character of the carbamate group;
concomitantly, this may also make it a less electron-withdrawing group
and lead to less acidification of the eliminated β-hydrogen.
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Affiliation(s)
- Alexander G Gavriel
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Flavien Leroux
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Gurjeet S Khurana
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Viliyana G Lewis
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Ann M Chippindale
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Mark R Sambrook
- CBR Division, Defence Science & Technology Laboratory (Dstl), Porton Down, Salisbury, Wiltshire SP4 0JQ, U.K
| | - Wayne Hayes
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Andrew T Russell
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
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11
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Dong F, Qian Y, Xu X, Shaghaleh H, Guo L, Liu H, Wang S. Preparation and characterization of UV-curable waterborne polyurethane using isobornyl acrylate modified via copolymerization. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2020.109474] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Cao W, Gao C. A hydrogel adhesive fabricated from poly(ethylene glycol) diacrylate and poly(allylamine hydrochloride) with fast and spontaneous degradability and anti-bacterial property. POLYMER 2020. [DOI: 10.1016/j.polymer.2019.122082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Synthesis and properties of degradable gels and porous polymers including acetal group in the network structure by addition reaction of multi-functional phenols and divinyl ether compounds. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-03033-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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14
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Composite polyurethane adhesives that debond-on-demand by hysteresis heating in an oscillating magnetic field. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109264] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Kato R, Kanazawa A, Aoshima S. Desilylation-Triggered Degradable Silylacetal Polymers Synthesized via Controlled Cationic Copolymerization of Trimethylsilyl Vinyl Ether and Cyclic Acetals. ACS Macro Lett 2019; 8:1498-1503. [PMID: 35651183 DOI: 10.1021/acsmacrolett.9b00745] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Silylacetal was demonstrated to function as a promising cleavable moiety for preparing polymers degradable via desilylation under diverse, mild conditions. The silylacetal moieties were installed in the main chain of the polymers via the controlled cationic copolymerization of trimethylsilyl vinyl ether (TMSVE) and a cyclic acetal under appropriately designed conditions. Importantly, desilylation reactions of the silylacetal units occurred under weak acid, base, or fluoride ion conditions, which triggered the degradation of the polymer via the spontaneous cleavage of the unstable hemiacetal moieties generated by the desilylation. Moreover, silylacetal moieties were successfully incorporated at the desired positions in the main chain via the addition of a small portion of TMSVE during the controlled cationic copolymerization of a vinyl ether and cyclic acetal. The strategy devised in this study will allow the design of elaborate polymers that undergo degradation triggered by various stimuli.
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Affiliation(s)
- Ryusei Kato
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Arihiro Kanazawa
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Sadahito Aoshima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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16
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Babra TS, Wood M, Godleman JS, Salimi S, Warriner C, Bazin N, Siviour CR, Hamley IW, Hayes W, Greenland BW. Fluoride-responsive debond on demand adhesives: Manipulating polymer crystallinity and hydrogen bonding to optimise adhesion strength at low bonding temperatures. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.07.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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17
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Ito S, Akiyama H, Mori M, Yoshida M, Kihara H. Azobenzene‐Containing Triblock Copolymer Adhesive Based on Light‐Induced Solid–Liquid Phase Transition: Application to Bonding for Various Substrates. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900105] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shotaro Ito
- Research Institute for Sustainable ChemistryNational Institute of Advanced Industrial Science and Technology 3‐11‐32, Kagamiyama Higashihiroshima, Hiroshima 739‐0046 Japan
| | - Haruhisa Akiyama
- Research Institute for Sustainable ChemistryNational Institute of Advanced Industrial Science and Technology Tsukuba Central 5, 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 Japan
| | - Miyuki Mori
- Research Institute for Sustainable ChemistryNational Institute of Advanced Industrial Science and Technology 3‐11‐32, Kagamiyama Higashihiroshima, Hiroshima 739‐0046 Japan
| | - Masaru Yoshida
- Research Institute for Sustainable ChemistryNational Institute of Advanced Industrial Science and Technology Tsukuba Central 5, 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 Japan
| | - Hideyuki Kihara
- Research Institute for Sustainable ChemistryNational Institute of Advanced Industrial Science and Technology 3‐11‐32, Kagamiyama Higashihiroshima, Hiroshima 739‐0046 Japan
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18
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Ito S, Akiyama H, Sekizawa R, Mori M, Fukata T, Yoshida M, Kihara H. Azobenzene-Containing Block Copolymers as Light-Induced Reworkable Adhesives: Effects of Molecular Weight, Composition, and Block Copolymer Architectures on the Adhesive Properties. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/pola.29331] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shotaro Ito
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST Chugoku); 3-11-32, Kagamiyama, Higashihiroshima, Hiroshima 739-0024 Japan
| | - Haruhisa Akiyama
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
| | - Reiko Sekizawa
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST Chugoku); 3-11-32, Kagamiyama, Higashihiroshima, Hiroshima 739-0024 Japan
| | - Miyuki Mori
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST Chugoku); 3-11-32, Kagamiyama, Higashihiroshima, Hiroshima 739-0024 Japan
| | - Tamaki Fukata
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
| | - Masaru Yoshida
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
| | - Hideyuki Kihara
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST Chugoku); 3-11-32, Kagamiyama, Higashihiroshima, Hiroshima 739-0024 Japan
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19
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Fang Y, Du X, Yang S, Wang H, Cheng X, Du Z. Sustainable and tough polyurethane films with self-healability and flame retardance enabled by reversible chemistry and cyclotriphosphazene. Polym Chem 2019. [DOI: 10.1039/c9py00680j] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-healable, flame-retardant, recyclable, and robust polyurethane films were enabled by thermally driven Diels–Alder chemistry and cyclotriphosphazene.
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Affiliation(s)
- Yuanlai Fang
- College of Biomass Science and Engineering; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- PR China
| | - Xiaosheng Du
- College of Biomass Science and Engineering; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- PR China
| | - Shiwen Yang
- College of Biomass Science and Engineering; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- PR China
| | - Haibo Wang
- College of Biomass Science and Engineering; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- PR China
| | - Xu Cheng
- College of Biomass Science and Engineering; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- PR China
| | - Zongliang Du
- College of Biomass Science and Engineering; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- PR China
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20
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Ito S, Akiyama H, Sekizawa R, Mori M, Yoshida M, Kihara H. Light-Induced Reworkable Adhesives Based on ABA-type Triblock Copolymers with Azopolymer Termini. ACS APPLIED MATERIALS & INTERFACES 2018; 10:32649-32658. [PMID: 30152226 DOI: 10.1021/acsami.8b09319] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Photocurable adhesives based on polymers and resins are an integral part of different production processes because of their fast curing and local area bonding ability. Recently, dismantlable adhesives have attracted a lot of attention for recycling adherends or replacement of adhesion defects. However, adhesives that allow repeatable bonding and debonding solely by light irradiation, i.e., without heat activation, are lacking. Here, ABA-type triblock copolymers consisting of poly(meth)acrylates bearing an azobenzene moiety (A block) and 2-ethylhexyl (B block) side chains were synthesized and utilized as photocurable adhesives. In contrast to the azo homopolymers, the block copolymer structure and incorporation of the soft middle block actualized a low concentration of the azobenzene moiety and consequently, higher flexibility of the resultant copolymers. This enabled film formation of the azobenzene-based adhesives and light-induced bonding for the first time. On the basis of the photoisomerization of the azobenzene moiety, changes in their viscoelastic property, i.e., softening and hardening, were induced by UV irradiation at 365 nm (50-100 mW cm-2) and green light irradiation at 520 nm (40 mW cm-2), respectively. In fact, two glass substrates were bonded with the self-standing polymer film, which was sequentially softened and hardened upon UV and green light irradiations. They exhibited shear strengths of 1.5-2.0 MPa, and UV irradiation lowered the adhesion strength to 0.5-0.1 MPa. Interestingly, the repeatable bonding and debonding abilities of the polymers were accomplished without loss of the adhesion strength.
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Affiliation(s)
- Shotaro Ito
- Research Institute for Sustainable Chemistry , National Institute of Advanced Industrial Science and Technology (AIST Chugoku) , 3-11-32 Kagamiyama , Higashihiroshima , Hiroshima 739-0024 , Japan
| | - Haruhisa Akiyama
- Research Institute for Sustainable Chemistry , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba Central 5, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8565 , Japan
| | - Reiko Sekizawa
- Research Institute for Sustainable Chemistry , National Institute of Advanced Industrial Science and Technology (AIST Chugoku) , 3-11-32 Kagamiyama , Higashihiroshima , Hiroshima 739-0024 , Japan
| | - Miyuki Mori
- Research Institute for Sustainable Chemistry , National Institute of Advanced Industrial Science and Technology (AIST Chugoku) , 3-11-32 Kagamiyama , Higashihiroshima , Hiroshima 739-0024 , Japan
| | - Masaru Yoshida
- Research Institute for Sustainable Chemistry , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba Central 5, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8565 , Japan
| | - Hideyuki Kihara
- Research Institute for Sustainable Chemistry , National Institute of Advanced Industrial Science and Technology (AIST Chugoku) , 3-11-32 Kagamiyama , Higashihiroshima , Hiroshima 739-0024 , Japan
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