In this contribution, we reported a novel synthesis of [4,4′-bi(1,3-dioxolane)]-2,2′-dione via the reaction of meso-erythritol, a bio-mass tetrahydric alcohol with carbon dioxide. This five-membered bicyclic carbonate was used as the precursor of polyhydroxyurethane (PHU). The PHU thermosets were obtained with a trifunctional polyetheramine (Jeffamine T-403) as the curing agent. The PHU thermoset was further modified with Fe₃O₄ nanoparticles (NPs) to afford the nanocomposites. To achieve the fine dispersion of Fe₃O₄ NPs, the Fe₃O₄ NPs were surface-functionalized with poly(2-oxo-1,3-dioxolane-4-yl)methyl methacrylate (PDOMA) via surface-initiated radical polymerization. Compared with plain PHU, the PHU-Fe₃O₄ nanocomposites displayed the improved mechanical properties. In the meantime, the nanocomposites had excellent shape memory and reprocessing properties. The shape memory properties can be triggered with laser irradiation by taking advantage of the photothermal effect of Fe₃O₄ NPs.

在这项贡献中，我们报道了一种通过内消旋赤藓糖醇（一种生物质四元醇）与二氧化碳反应合成 [4,4'-双（1,3-二氧戊环）]-2,2'-二酮的新方法。这种五元双环碳酸酯被用作聚羟基氨基甲酸酯 (PHU) 的前体。PHU 热固性树脂是用三官能聚醚胺 (Jeffamine T-403) 作为固化剂获得的。PHU 热固性材料进一步用 Fe ₃ O ₄纳米颗粒 (NPs)改性，以提供纳米复合材料。为了实现Fe的微细分散_3周ö _4周的NP的Fe _3个ö ₄纳米颗粒是表面官能化的聚（2-氧代-1,3-二氧戊环-4-基）甲基丙烯酸甲酯（PDOMA）通过表面引发的自由基聚合。与普通 PHU 相比，PHU-Fe ₃ O ₄纳米复合材料显示出改进的机械性能。同时，纳米复合材料具有优异的形状记忆和再加工性能。通过利用 Fe ₃ O ₄ NPs的光热效应，可以通过激光照射触发形状记忆特性。