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首页> 外文期刊>RSC Advances >Design of melt-recyclable poly(epsilon-caprolactone)-based supramolecular shape-memory nanocomposites
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Design of melt-recyclable poly(epsilon-caprolactone)-based supramolecular shape-memory nanocomposites

机译：熔融可回收聚（ε-己内酯）的基于超分子形状记忆纳米复合材料的设计

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摘要

A novel poly(epsilon-caprolactone) (PCL) supramolecular network exhibiting shape-memory behavior was successfully constructed with pendant UPy units that are highly able to dimerize. The dynamic network was obtained by a simple and versatile strategy consisting of chain-extension reaction between alpha,omega-dihydroxyoligoPCL and hydroxylated UPy units in the presence of hexamethylene diisocyanate as a coupling agent and further intermolecular dimerization of the UPy along the polyurethane backbone. H-1 NMR analyses confirmed the dynamic features of the system, and DMTA in tensile mode was investigated to assess the SMP properties. Recyclability was also assessed by taking advantage of these supramolecular networks. Further addition of cellulose nanocrystals into the polymer network enabled adjustment of the extent of the net-points and therefore the SMP features. As confirmed by dispersion tests in solution and SEM observations, these bio-based nanofillers were homogeneously distributed in the network via supramolecular interaction between the hydroxyl groups present on their surface and UPy moieties along the polyurethane backbone. Thus, the here developed nanomaterials might reveal applicability in areas where a combination of SMP and biocompatibility is needed.
机译：具有表现出形状记忆行为的新型聚（ε-己内酯）（PCL）超分子网络，其具有能够倾向于二聚体的吊坠Upy单元。动态网络是通过在六亚甲基二异氰酸酯作为偶联剂存在下α，ω-二羟基羟基醇和羟基化的Umy单元之间的简单和通用的策略而获得的简单且通用的策略，以及沿着聚氨酯骨架的进一步分子分子分子分子化。 H-1 NMR分析确认了系统的动态特征，研究了拉伸模式下的DMTA以评估SMP性质。通过利用这些超分子网络，还评估了可回收性。进一步加入纤维素纳米晶体进入聚合物网络，使得能够调整网点的程度，因此是SMP特征。通过在溶液和SEM观察中的分散试验证实，这些生物基纳米填料通过在其表面和沿着聚氨酯骨架上的表面和Upy部分之间的羟基之间通过超分子相互作用均匀分布。因此，这里开发的纳米材料可能会揭示所需SMP和生物相容性组合的区域中的适用性。

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  • 来源
    《RSC Advances》 |2018年第48期|共12页
  • 作者

    Pilate Florence; Wen Zhi-Bin; Khelifa Farid; Hui Yan; Delpierre Sebastien; Dan Luo; Mincheva Rosica; Dubois Philippe; Yang Ke-Ke; Raquez Jean-Marie;

  • 作者单位

    Univ Mons UMONS Ctr Innovat &

    Res Mat &

    Polymers CIRMAP Lab Polymer &

    Composite Mat LPCM 23 Pl Parc B-7000 Mons Belgium;

    Sichuan Univ State Key Lab Polymer Mat Engn Natl Engn Lab Ecofriendly Polymer Mat Sichuan Ctr Degradable &

    Flame Retardant Polymer Mat ERCE Chengdu 610064 Sichuan Peoples R China;

    Univ Mons UMONS Ctr Innovat &

    Res Mat &

    Polymers CIRMAP Lab Polymer &

    Composite Mat LPCM 23 Pl Parc B-7000 Mons Belgium;

    Sichuan Univ State Key Lab Polymer Mat Engn Natl Engn Lab Ecofriendly Polymer Mat Sichuan Ctr Degradable &

    Flame Retardant Polymer Mat ERCE Chengdu 610064 Sichuan Peoples R China;

    Univ Mons UMONS Ctr Innovat &

    Res Mat &

    Polymers CIRMAP Lab Polymer &

    Composite Mat LPCM 23 Pl Parc B-7000 Mons Belgium;

    Sichuan Univ State Key Lab Polymer Mat Engn Natl Engn Lab Ecofriendly Polymer Mat Sichuan Ctr Degradable &

    Flame Retardant Polymer Mat ERCE Chengdu 610064 Sichuan Peoples R China;

    Univ Mons UMONS Ctr Innovat &

    Res Mat &

    Polymers CIRMAP Lab Polymer &

    Composite Mat LPCM 23 Pl Parc B-7000 Mons Belgium;

    Univ Mons UMONS Ctr Innovat &

    Res Mat &

    Polymers CIRMAP Lab Polymer &

    Composite Mat LPCM 23 Pl Parc B-7000 Mons Belgium;

    Sichuan Univ State Key Lab Polymer Mat Engn Natl Engn Lab Ecofriendly Polymer Mat Sichuan Ctr Degradable &

    Flame Retardant Polymer Mat ERCE Chengdu 610064 Sichuan Peoples R China;

    Univ Mons UMONS Ctr Innovat &

    Res Mat &

    Polymers CIRMAP Lab Polymer &

    Composite Mat LPCM 23 Pl Parc B-7000 Mons Belgium;

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