Polymer-based form-stable phase change materials (FPCMs) have attracted much attention due to their excellent shape stability and facileness, low-energy-consumption preparation. However, bio-based recyclable phase change energy storage materials (PCMs), crucial for reducing pollution and sustainable energy storage, have not yet been prepared. Herein, we prepared a novel bio-based recyclable PCM (DGEM-18/FA/MA/xBW), in which a novel epoxy resin (DGEM) was synthesized by using bio-based magnolol and epichlorohydrin, bio-based 2-Furanmethanamine (FA) and C36-alkylenediamines bismaleimide (MA) were used to construct a reversible crosslinked network based on epoxy-amine ring opening and Diels-Alder (D-A) reactions as the supporting frame. And 1-Octadecanethiol (ODT) and bio-based beeswax (BW) with phase change property were introduced into this supporting frame by grafting on the C=C of Magnolol via “thiol-ene” click reaction and physical blending, respectively. The D-A and rD-A reactions proceed at the temperature below 80℃ and above 120°C, respectively, which provides recyclability of the crosslinked network. The ODT and beeswax provide phase change latent heat up to 119.1 J/g for the sample DGEM-18/FA/MA/1.1BW. Furthermore, taking DGEM-18/FA/MA/0.4BW as an example, its shape memory performance has been explored, as well as its potential applications in recyclable thermal management coatings. To the best of our knowledge, this is the first report on the preparation of bio-based recyclable FPCMs.

聚合物基形态稳定相变材料（FPCMs）由于其优异的形状稳定性和易制备性、低能耗制备而备受关注。然而，对于减少污染和可持续储能至关重要的生物基可回收相变储能材料（PCM）尚未制备。在此，我们制备了一种新型的生物基可回收 PCM（DGEM-18/FA/MA/xBW），其中使用生物基厚朴酚和环氧氯丙烷合成了一种新型环氧树脂（DGEM），生物基 2-呋喃甲胺（ FA) 和 C36-亚烷基二胺双马来酰亚胺 (MA) 用于构建基于环氧胺开环和 Diels-Alder (DA) 反应作为支撑框架的可逆交联网络。并将具有相变特性的1-十八烷硫醇（ODT）和生物基蜂蜡（BW）分别通过“硫醇-烯”点击反应和物理共混接枝到厚朴酚的C=C上，引入该支撑框架。DA 和 rD-A 反应分别在低于 80°C 和高于 120°C 的温度下进行，这提供了交联网络的可回收性。ODT 和蜂蜡为样品 DGEM-18/FA/MA/1.1BW 提供高达 119.1 J/g 的相变潜热。此外，以DGEM-18/FA/MA/0.4BW为例，探索了其形状记忆性能，以及其在可回收热管理涂料中的潜在应用。据我们所知，这是第一份关于制备生物基可回收 FPCM 的报告。