<sub id="5rfnl"><var id="5rfnl"><ins id="5rfnl"></ins></var></sub><sub id="5rfnl"><dfn id="5rfnl"><mark id="5rfnl"></mark></dfn></sub>
    <address id="5rfnl"><listing id="5rfnl"></listing></address>
      <sub id="5rfnl"><var id="5rfnl"><ins id="5rfnl"></ins></var></sub>
      <sub id="5rfnl"><var id="5rfnl"><ins id="5rfnl"></ins></var></sub>

          <address id="5rfnl"><listing id="5rfnl"></listing></address>

            <sub id="5rfnl"><var id="5rfnl"><ins id="5rfnl"></ins></var></sub>

            <thead id="5rfnl"><var id="5rfnl"><output id="5rfnl"></output></var></thead>

            <address id="5rfnl"></address>

            Developing an autonomous room temperature self-healing supramolecular
            polyurethane (PU) with toughness and stiffness remains a great challenge.
            Herein, a novel concept that utilizes a T-shaped chain extender with double
            amide hydrogen bonds in a side chain to extend PU prepolymers to construct
            highly stiff and tough supramolecular PU with integrated functions is
            reported. Mobile side-chain H-bonds afford a large flexibility to modulate
            the stiffness of the PUs ranging from highly stiff and tough elastomer
            (105.87 MPa Young’s modulus, 27 kJ m?2 tearing energy), to solvent-free
            hot-melt adhesive, and coating. The dynamic side-chain multiple H-bonds
            afford an autonomous self-healability at room temperature (25 °C). Due to
            the rapid reconstruction of hydrogen bonds, this PU adhesive demonstrates
            a high adhesion strength, fast curing, reusability, long-term adhesion, and
            excellent low-temperature resistance. Intriguingly, the PU emits intrinsic
            blue fluorescence presumably owing to the aggregation-induced emission of
            tertiary amine domains induced by side-chain H-bonds. The PU is explored
            as a counterfeit ink coated on the predesigned pattern, which is visiblelight
            invisible and UV-light visible. This work represents a universal and
            facile approach to fabricate supertough supramolecular PU with tailorable
            functions by chain extension of PU prepolymers with multiple H-bonding
            chain extenders.


            Yuan Yao,Ziyang Xu,Bo Liu,Meng Xiao,Jianhai Yang,Wenguang Liu.


            Advanced Functional Materials,31:4,2006944(2020)

            开云全站登录官网app_app下载-官网下载 <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <文本链> <文本链> <文本链> <文本链> <文本链> <文本链>