Supramolecular polyurethane networks containing pyridine moieties for shape memory materials

Chen, Shaojun; Hu, Jinlian; Yuen, C.W.M.; Chan, Laikuen

doi:10.1016/j.matlet.2009.03.028

Cited by 59 publications

(42 citation statements)

References 8 publications

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“…Chan and co‐workers have shown the development and evolution of SPUs which have shape memory. Novel N , N ‐bis‐(2‐hydroxyethyl) isonicotinamide (BINA) reacted with hexamethylene diisocyanate and crosslinked with 1,4‐butanediol exhibited the phase separation demonstrated by similar supramolecular materials . T g is controlled by the BINA content, and this pyridine moiety acts as a molecular switch, turning hydrogen bonding on and off in response to temperature.…”

Section: Supramolecular Polyurethanesmentioning

confidence: 99%

Hydrogen-bonded supramolecular polyurethanes

Houton

Wilson

2014

Polym. Int.

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As a class of materials, supramolecular polymers represent an exciting area of advanced materials research. The combination of unique properties, easy synthesis and response to the environment or external and temporal stimuli makes them important as a focus for the next generation of materials. Understanding and manipulating the non-covalent interactions leading to polymer assembly allows control over properties by selecting specific building blocks with well-understood non-covalent chemistry from an established toolkit. This allows assembly of defined and easily manipulated architectures, where physical characteristics similar to conventional high-molecular-weight polymers can be realized. Herein, we describe recent studies of the self-assembly of polyurethane-based supramolecular materials.

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Section: Supramolecular Polyurethanesmentioning

confidence: 99%

Hydrogen-bonded supramolecular polyurethanes

Houton

Wilson

2014

Polym. Int.

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“…The figure included the absorption regions for N-H (3328 cm À 1 ), CQO (1733 cm À 1 ) [7], C-O (1166 and 1067 cm À 1 ) [8] and CO-NH (1539 cm À 1 ) [9]. They delegated the formation of urethane groups (-NHCOO-) [10] and urea groups (-NHCONH-). Moreover, in Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of TiO2–SiO2/waterborne polyurethane hybrid with amino-siloxane terminated via a sol–gel process

et al. 2012

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“…CLSMPU containing 75% soft segment content was synthesized by bulk polymerization in our lab according to the literature procedure [18,19]. The PySMPU containing various contents of pyridine moieties was synthesized by solution polymerization in our lab according to the literature procedure [15]. For comparison study, TPU based on polytetramethylene glycol with glass transition temperature of -30°C are selected in this study.…”

Section: Experimental Section 21 Materialsmentioning

confidence: 99%

“…Recently, antibacterial activity was reported in the SMPU ionomers by Zhu et al [14]. Most recently, Chen et al [15][16][17] had also synthesized one novel kind of supramolecular SMPUs containing pyridine moieties. Not only thermal-induced shape memory effect (SME) [17], but moisture-sensitive shape memory effect are also achieved in the pyridine containing SMPUs (PySMPUs) [16].…”

Section: Introductionmentioning

confidence: 99%

Coaxial electrospun polyurethane core-shell nanofibers for shape memory and antibacterial nanomaterials

Zhuo¹,

Hu²,

Chen³

2011

Express Polym. Lett.

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Abstract.A novel kind of shape memory polyurethane (SMPU) nanofibers with core-shell nanostructure is fabricated using coaxial electrospinning. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) results show that nanofibers with core-shell structure or bead-on-string structure can be electrospun successfully from the core solution of polycaprolactone based SMPU (CLSMPU) and shell solution of pyridine containing polyurethane (PySMPU). In addition to the excellent shape memory effect with good shape fixity, excellent antibacterial activity against both gramnegative bacteria and gram-positive bacteria are achieved in the CLSMPU-PySMPU core-shell nanofiber. Finally, it is proposed that the antibacterial mechanism should be resulted from the PySMPU shell materials containing amido group in ! position and the high surface area per unit mass of nanofibers. Thus, the CLSMPU-PySMPU core shell nanofibers can be used as both shape memory nanomaterials and antibacterial nanomaterials.

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Supramolecular polyurethane networks containing pyridine moieties for shape memory materials

Cited by 59 publications

References 8 publications

Hydrogen-bonded supramolecular polyurethanes

Hydrogen-bonded supramolecular polyurethanes

Synthesis of TiO2–SiO2/waterborne polyurethane hybrid with amino-siloxane terminated via a sol–gel process

Coaxial electrospun polyurethane core-shell nanofibers for shape memory and antibacterial nanomaterials

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