皮芯型复合储能调温聚酰胺6纤维的制备与表征

为获得高热稳定性的相变材料，首先以聚乙二醇为相变介质、多孔硅酸盐为载体，经纳米杂化制备了形态稳定的相变材料（PCMg）。然后以聚酰胺6（PA6）为皮层，PCMg/PA6 共混材料为芯层，按照皮芯质量比为 3：7 通过熔融纺丝制备了皮芯型复合储能调温聚酰胺 6 纤维。借助差示扫描量热仪、热重分析仪、K 型热电偶测温仪、场发射扫描电子显微镜、复丝强力仪等对纤维的结构和性能进行表征。结果表明：制备的储能调温纤维的断裂强度达到2.52 cN/dtex，断裂伸长率为30.5%，该纤维可在－10.71～22.87℃和 38.96～58.33℃范围内实现智能调温；PCMg的质量分数为10%时，储能调温纤维的相变焓约为9.02 J/g。

Preparation and characterization of sheath-core energy storage and thermo-regulated composite fibers of polyamide 6

In order to obtain change material with high thermal stability of the phase,the morphologically stable phase change materials (PCMg) were prepared by nano hybridization firstly with poly (ethylene glycol) as phase change material and porous nanomaterials as carrier. Then polyamide 6 (PA6) was used ascortex, and blending material of PCMg / PA6 was used ascore layer. The sheath-core mass composite energy storage and thermo-regulated fibers of polyamide 6 were prepared by melt spinning according to sheath-core ratio 3：7. The structure and properties of the fibers were characterized by means of differential scanning calorimetry, thermogravimetric analyzer, K-type thermocouple thermometer, field emission scanning electron microscope, multifilament strength tester and so on. The results show that strength of the energy storage andthermo-regulated fibers of polyamide 6 is 2.52 cN/dtex, and the elongation at break of fibers is 30.5%. The fiber can achieve intelligent thermostat in the temperature range of -10.71 - 22.87℃ and 38.96 - 58.33℃. When the addtion amount of PCMg is 10%, the enthalpy reached up to about 9.02 J/g