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  • Wiley  (9)
  • Zheng, Zhaohui  (9)
  • English  (9)
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  • Wiley  (9)
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  • English  (9)
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  • 1
    Online Resource
    Online Resource
    Reprocessable and Self‐Healing Shape Memory Epoxy Resin Based on Biphenyl Mesogen and Siloxane
    Wiley ; 2021
    In:  Macromolecular Chemistry and Physics Vol. 222, No. 23 ( 2021-12)
    Details
    In: Macromolecular Chemistry and Physics, Wiley, Vol. 222, No. 23 ( 2021-12)
    Abstract: Shape memory epoxy resin has a high potential for applications in various fields such as space deployable structures and actuators. In order to meet the requirements of application and extend the materials' service life, it is highly desirable to develop a shape memory epoxy resin with good properties of shape memory, reprocessing, and self‐healing. In this work, a shape memory epoxy resin based on the orientable biphenyl mesogen and the dynamic siloxane is fabricated successfully via anion ring‐opening polymerization. The resulting epoxy resin exhibits excellent shape memory performance, good reprocessing ability, good self‐healing property, and triple shape memory effect (triple‐SME).
    Type of Medium: Online Resource
    ISSN: 1022-1352 , 1521-3935
    URL: Issue
    URL: Article
    DOI: 10.1002/macp.v222.23
    DOI: 10.1002/macp.202100290
    RVK:
    VA 5810
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1176768-6
    detail.hit.zdb_id: 1475026-0
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  • 2
    Online Resource
    Online Resource
    Isoindigo‐Based Dual‐Acceptor Conjugated Polymers Incorporated Conjugation Length and Intramolecular Charge Transfer for High‐Efficient Photothermal Conversion
    Wiley ; 2023
    In:  Macromolecular Rapid Communications Vol. 44, No. 19 ( 2023-10)
    Details
    In: Macromolecular Rapid Communications, Wiley, Vol. 44, No. 19 ( 2023-10)
    Abstract: Photothermal tumor therapy (PTT) and photoacoustic imaging (PA) have emerged as promising noninvasive diagnostic and therapeutic approaches for cancer treatment. However, the development of efficient PTT agents with high photostability and strong near‐infrared (NIR) absorption remains challenging. This study synthesizes three isoindigo‐based dual‐acceptor conjugated polymers (CPs) (P‐IIG‐TPD, P‐IIG‐DPP, and P‐IIG‐EDOT‐BT) via a green and nontoxic direct arylation polymerization (DArP) method and characterizes their optical, electrochemical, and NIR photothermal conversion properties. By incorporating two acceptors into the backbone, the resulting polymers exhibit enhanced photothermal conversion efficiency (PCE) due to improved synergy among conjugation length, planarity, and intramolecular charge transfer (ICT). The nanoparticles (NPs) of P‐IIG‐EDOT‐BT and P‐IIG‐DPP have a uniform size distribution around 140 nm and exhibit remarkable NIR absorption at 808 nm. In addition, P‐IIG‐EDOT‐BT and P‐IIG‐DPP NPs exhibit high PCEs of 62% and 78%, respectively. This study promotes the molecular design of CPs as NIR photothermal conversion materials and provides guidance for the development of novel dual‐acceptor CPs for tumor diagnosis and treatment.
    Type of Medium: Online Resource
    ISSN: 1022-1336 , 1521-3927
    URL: Issue
    URL: Article
    DOI: 10.1002/marc.v44.19
    DOI: 10.1002/marc.202300244
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1475027-2
    detail.hit.zdb_id: 1176770-4
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  • 3
    Online Resource
    Online Resource
    A Facile and General Approach to Recoverable High‐Strain Multishape Shape Memory Polymers
    Wiley ; 2018
    In:  Macromolecular Rapid Communications Vol. 39, No. 6 ( 2018-03)
    Details
    In: Macromolecular Rapid Communications, Wiley, Vol. 39, No. 6 ( 2018-03)
    Abstract: Fabricating a single polymer network with no need to design complex structures to achieve an ideal combination of tunable high‐strain multiple‐shape memory effects and highly recoverable shape memory property is a great challenge for the real applications of advanced shape memory devices. Here, a facile and general approach to recoverable high‐strain multishape shape memory polymers is presented via a random copolymerization of acrylate monomers and a chain‐extended multiblock copolymer crosslinker. As‐prepared shape memory networks show a large width at the half‐peak height of the glass transition, far wider than current classical multishape shape memory polymers. A combination of tunable high‐strain multishape memory effect and as high as 1000% recoverable strain in a single chemical‐crosslinking network can be obtained. To the best of our knowledge, this is the first thermosetting material with a combination of highly recoverable strain and tunable high‐strain multiple‐shape memory effects.
    Type of Medium: Online Resource
    ISSN: 1022-1336 , 1521-3927
    URL: Issue
    URL: Article
    DOI: 10.1002/marc.v39.6
    DOI: 10.1002/marc.201700613
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1475027-2
    detail.hit.zdb_id: 1176770-4
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  • 4
    Online Resource
    Online Resource
    Thermadapt Shape Memory Polymers with Predictable and Arbitrary Shape Shifting
    Wiley ; 2019
    In:  Macromolecular Chemistry and Physics Vol. 220, No. 2 ( 2019-01)
    Details
    In: Macromolecular Chemistry and Physics, Wiley, Vol. 220, No. 2 ( 2019-01)
    Abstract: The development of shape memory polymers (SMPs) with a better linear relationship between the shape retention ratio ( R ret ) and the corresponding stress relaxation ( R σ ) can address scientific challenges, such that the arbitrary shape shifting can be realized and a desired and accurate strain can be obtained during the procedure of stress relaxation. This method is predictable, accurate, time‐saving, and can prevent the deterioration of materials. However, almost no attention is paid to the predictable and arbitrary shape‐shifting phenomenon. Here, a new phenomenon that the materials exhibit a relatively better linear relationship and the major factor behind the phenomenon—there is a better linear relationship with the decrease in the molecular weight between the cross‐linking points ( M c )—are found. Such a one shape memory network with combined catalyst‐free, arbitrary shape shifting, and reprocessability without sacrificing the outstanding shape memory performance, is expected to have a significant and positive impact on the medical device industry, and provides a new strategy for the design of thermadapt SMPs.
    Type of Medium: Online Resource
    ISSN: 1022-1352 , 1521-3935
    URL: Issue
    URL: Article
    DOI: 10.1002/macp.v220.2
    DOI: 10.1002/macp.201800390
    RVK:
    VA 5810
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1176768-6
    detail.hit.zdb_id: 1475026-0
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  • 5
    Online Resource
    Online Resource
    High modulus ratio shape‐memory polymers achieved by combining hydrogen bonding with controlled crosslinking
    Wiley ; 2011
    In:  Journal of Polymer Science Part B: Polymer Physics Vol. 49, No. 17 ( 2011-09), p. 1241-1245
    Details
    In: Journal of Polymer Science Part B: Polymer Physics, Wiley, Vol. 49, No. 17 ( 2011-09), p. 1241-1245
    Abstract: A new type of poly(methyl acrylate)‐ co ‐(acrylic acid) (PMA‐AA) networks obtained by combining hydrogen bonding with controlled crosslinking exhibit full and rapid shape‐memory recovery. The structure, thermal properties, dynamical mechanical properties and shape‐memory effects of these networks were presented. High modulus ratios were achieved for the series of PMA‐AA networks based on intense self‐complementary hydrogen bonding in poly(acrylic acid) (PAA) segments. This lead to excellent shape‐memory effects with strain‐recovery ratio above 99%. Meanwhile, faster recovery speed was achieved by the synergistic effect of hydrogen bonding and controlled crosslinking compared to the linear PMA‐AA copolymers. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 1241–1245, 2011
    Type of Medium: Online Resource
    ISSN: 0887-6266 , 1099-0488
    URL: Issue
    URL: Article
    DOI: 10.1002/polb.v49.17
    DOI: 10.1002/polb.22317
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 1473448-5
    detail.hit.zdb_id: 233082-9
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  • 6
    Online Resource
    Online Resource
    A Versatile Polymer Co‐Network with Broadened Glass Transition Showing Adjustable Multiple‐Shape Memory Effect
    Wiley ; 2012
    In:  Macromolecular Chemistry and Physics Vol. 213, No. 21 ( 2012-11-14), p. 2246-2252
    Details
    In: Macromolecular Chemistry and Physics, Wiley, Vol. 213, No. 21 ( 2012-11-14), p. 2246-2252
    Abstract: In this study, a versatile poly(methyl methacrylate)–poly( ϵ ‐caprolactone) covalently crosslinked polymer co‐network (PMMA–PCL CPN) tethering all polymeric chains between netpoints is designed and prepared to develop a novel type of adjustable multiple‐shape memory polymers. The CPN is demonstrated to produce a broadening of glass transition and memorize up to four different shapes based on a single thermal transition for the first time, as the whole energy stored in the broad transition can be distributed into several parts for multi‐step shape fixation and recovery in one‐shape memory cycle. Furthermore, the versatile multiple‐shape memory effects from dual to quadruple can be adjusted simply by shifting the corresponding deformation temperatures on demands, without variation of material chemistry.
    Type of Medium: Online Resource
    ISSN: 1022-1352 , 1521-3935
    URL: Issue
    URL: Article
    DOI: 10.1002/macp.v213.21
    DOI: 10.1002/macp.201200231
    RVK:
    VA 5810
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 1176768-6
    detail.hit.zdb_id: 1475026-0
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  • 7
    Online Resource
    Online Resource
    Reconfigurable and Reprocessable Thermoset Shape Memory Polymer with Synergetic Triple Dynamic Covalent Bonds
    Wiley ; 2018
    In:  Macromolecular Rapid Communications Vol. 39, No. 10 ( 2018-05)
    Details
    In: Macromolecular Rapid Communications, Wiley, Vol. 39, No. 10 ( 2018-05)
    Abstract: Degradable shape memory polymers (SMPs), especially for polyurethane‐based SMPs, have shown great potential for biomedical applications. How to reasonably fabricate SMPs with the ideal combination of degradability, shape reconfigurability, and reprocessability is a critical issue and remains a challenge for medical disposable materials. Herein, a shape memory poly(urethane‐urea) with synergetic triple dynamic covalent bonds is reported via embedding polycaprolactone unit into poly(urethane‐urea) with the hindered urea dynamic bond. The single polymer network is biodegradable, thermadapt, and reprocessable, without sacrificing the outstanding shape memory performance. Such a shape memory network with plasticity and reprocessability is expected to have significant and positive impact on the medical device industry.
    Type of Medium: Online Resource
    ISSN: 1022-1336 , 1521-3927
    URL: Issue
    URL: Article
    DOI: 10.1002/marc.v39.10
    DOI: 10.1002/marc.201800128
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1475027-2
    detail.hit.zdb_id: 1176770-4
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  • 8
    Online Resource
    Online Resource
    Reprocessable Shape Memory Epoxy Resin Based on Substituent Biphenyl Structure
    Wiley ; 2021
    In:  Macromolecular Chemistry and Physics Vol. 222, No. 10 ( 2021-05)
    Details
    In: Macromolecular Chemistry and Physics, Wiley, Vol. 222, No. 10 ( 2021-05)
    Abstract: Despite significant progress in realizing the reprocessability in epoxy resins, it is very meaningful to develop a reprocessable shape memory epoxy resins with excellent shape recovery properties and good repeatability. In this work, a reprocessable shape memory epoxy resin based on substituent diphenyl structure is synthesized successfully via solution polymerization, which possesses good shape memory performance both before and after reprocessing with shape fixity ratio ( R f ) over 95%, shape recovery ratio ( R r ) more than 99% and fine shape recovery ability. This work can provide a feasible approach to improve the shape memory performance of shape memory epoxy resin, a further understanding of shape memory mechanisms and the broadening field of application.
    Type of Medium: Online Resource
    ISSN: 1022-1352 , 1521-3935
    URL: Issue
    URL: Article
    DOI: 10.1002/macp.v222.10
    DOI: 10.1002/macp.202000401
    RVK:
    VA 5810
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1176768-6
    detail.hit.zdb_id: 1475026-0
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  • 9
    Online Resource
    Online Resource
    Reprocessable and Multiple Shape Memory Thermosets with Reconfigurability
    Wiley ; 2019
    In:  Macromolecular Rapid Communications Vol. 40, No. 11 ( 2019-06)
    Details
    In: Macromolecular Rapid Communications, Wiley, Vol. 40, No. 11 ( 2019-06)
    Abstract: Multiple shape memory thermosets for various engineering applications have been quickly developed in recent years, mainly due to their stable thermomechanical performance, environmental stability, excellent chemical, solvent resistance, etc. However, these thermosets are inherently non‐recyclable due to their chemically crosslinked properties, and it is difficult to make the permanent shapes of these thermosets sophisticated and geometrically complex, which significantly restricts a great variety of engineering applications in the industry and technology fields, mainly due to the economic inefficiency and environmental impact. Here, a thermoset with recyclability, multiple shape memory effect (multi‐SME), and permanent shape reconfiguration is reported. After recycling, it also exhibits excellent mechanical properties without sacrificing the excellent multi‐SME, combined elasticity (shape memory), and solid state plasticity, which can be easily scaled up and generalized to a variety of dynamic covalent networks.
    Type of Medium: Online Resource
    ISSN: 1022-1336 , 1521-3927
    URL: Issue
    URL: Article
    DOI: 10.1002/marc.v40.11
    DOI: 10.1002/marc.201900001
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1475027-2
    detail.hit.zdb_id: 1176770-4
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