Phase change materials (PCMs) can alleviate concerns about energy to a certain extent by reversibly storing a plenty of renewable and sustainable thermal energy. However, they do not have any flexibility due to their liquid leakage and solid rigidity, making them unsuitable for further practical wearable applications. Herein, a series of SEBS/n-alkane PCM composite films (PCMFs) were fabricated. SEBS is mainly used as the supporting substrate to prevent the leakage of liquid n-alkanes and endue the PCMFs with excellent mechanical properties. Where, the tensile strain and tensile strength of SEBS/n-HD-50% PCMF separately are 780% and 9.96 MPa, representing excellent stretchability and deformability, tailorability, and foldability. Particularly, the onset melting and crystallization temperatures (T_mo, T_co) of SEBS/n-ES-50% and SEBS/n-DS-50% PCMFs individually are 28.1 °C and 28.4 °C, 33.8 °C and 35.7 °C, which match the comfort zone for human skin and the ideal thermo-response temperature range of smart windows, and a range of experiments have verified their feasibility in the fields of thermal management, smart windows and infrared stealth. This study well solves the problems of liquid leakage and solid rigidity of PCMs themselves, endows them with excellent comprehensive performance, and greatly expanding the practical applications of PCMs.

相变材料（PCM）通过可逆地储存大量可再生和可持续的热能，可以在一定程度上缓解人们对能源的担忧。然而，由于它们的液体泄漏和固体刚性，它们不具有任何柔韧性，使得它们不适合进一步实际的可穿戴应用。在此，制造了一系列 SEBS/正烷烃 PCM 复合膜 (PCMF)。SEBS主要用作支撑基底以防止液体正烷烃的泄漏并赋予PCMF优异的机械性能。其中，SEBS/ n的拉伸应变和拉伸强度-HD-50% PCMF分别为780%和9.96 MPa，具有优异的拉伸变形性、裁剪性和折叠性。特别是SEBS/ n -ES-50% 和 SEBS/ n的起始熔化和结晶温度 ( T _mo , T _{co )}-DS-50% PCMF分别为28.1°C和28.4°C、33.8°C和35.7°C，符合人体皮肤的舒适区和智能窗的理想热响应温度范围，一系列实验表明验证了它们在热管理、智能窗和红外隐身等领域的可行性。该研究很好地解决了相变材料本身的漏液和固体刚性问题，赋予其优异的综合性能，大大拓展了相变材料的实际应用。