Kapok fiber, an agricultural product, is a typical cellulosic fiber with the features of thin cell wall and large lumen. Herein, a microtubule-based composite with high porosity of 98.03 % was prepared using kapok fibers and hollow PET. The kapok fiber-based composite successfully encapsulated a phase change material (PCM), that is a fatty acid ester of myristic acid and tetradecyl alcohol (MA-TD), in the microtubules by vacuum impregnation. The SEM showed that the PCM was encapsulated in the lumens of the fibers with a calculated percentage of 40.5 %. This condition provided the composite a basic thermal insulation from air pockets in the composite and a dynamic thermal insulation from the PCM. The kapok/PET/MA-TD could absorb 76.8 J/g latent heat in the comfort temperature range of 24 °C – 42.3 °C or release 77.4 J/g latent heat in the comfort temperature range of 29.7 °C – 10.5 °C. It withstood repeated laundry and exhibited robust leakage resistance to continuous heating/cooling under pressure. In addition, the composite was successfully used to dynamically regulate the temperature with obvious thermal regulating capacity in the simulated cooling/hot environments. Such material will be a robust candidate for dynamic heat regulating and thermal insulating applications.

木棉纤维是一种农产品，是典型的纤维素纤维，具有薄的细胞壁和大的内腔特征。在此，使用木棉纤维和中空PET制备具有98.03％的高孔隙率的微管基复合材料。木棉纤维基复合材料通过真空浸渍成功地将相变材料（PCM）封装在微管中，该相变材料是肉豆蔻酸和十四烷基醇的脂肪酸酯（MA-TD）。SEM表明，PCM被包封在纤维的内腔中，计算出的百分比为40.5％。这种情况为复合材料提供了与复合材料中的气穴的基本绝热，以及与PCM形成的动态绝热。木棉/ PET / MA-TD在舒适温度范围为24°C – 42.3°C时可以吸收76.8 J / g潜热或释放77。在29.7°C – 10.5°C的舒适温度范围内，潜热为4 J / g。它可以承受反复的洗衣，并且在压力下对连续加热/冷却表现出强大的防漏性能。此外，该复合材料已成功用于在模拟的冷却/高温环境中以明显的热调节能力动态调节温度。这种材料将是动态热调节和隔热应用的可靠选择。