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通过自由基聚合方法成功制备的新型梳状相变聚合物—聚二乙二醇十六烷基醚单丙烯酸酯(PC16E2AC),其相变温度为35℃,十分接近人体温度。选取PC16E2AC为芯材,丙烯腈偏氯乙烯共聚物P(AN-co-VDC)为皮材,利用同轴湿法纺丝工艺制备了一系列热焓值不同的PC16E2AC-P(AN-co-VDC)复合调温纤维,并对其形貌、结构和热性能进行了表征。结果表明:制备的PC16E2AC-P(AN-co-VDC)复合调温纤维直径均一,表面光滑,具有明显的皮芯结构。并且随着皮芯挤出比(S:C)的增加,皮材直径逐渐增大,芯材直径逐渐减小,复合调温纤维的断裂强度逐渐增大,热焓值也从23J/g逐渐增加到57J/g。此外,PC16E2AC-P(AN-co-VDC)复合调温纤维在220℃以下具有良好的热稳定性。300次的冷/热循环测试和24小时的抽提实验表明,该复合调温纤维具有良好的耐热循环稳定性和抗渗透性。值得注意的是,PC16E2AC-P(AN-co-VDC)复合调温纤维的相变温度始终在35℃左右,表明其有望用于智能纺织品领域。
A novel comb-like phase change polymer, poly (ethylene glycol) cetyl ether monoacrylate (PC16E2AC), prepared by the free radical polymerization method, has a phase transition temperature of 35 ℃ and is very close to human body temperature. A series of PC16E2AC-P (AN-co-VDC) with different enthalpy values were prepared by co-axial wet spinning process using PC16E2AC as core material and acrylonitrile-vinylidene chloride copolymer P VDC) composite temperature control fiber, and its morphology, structure and thermal properties were characterized. The results showed that the PC12E2AC-P (AN-co-VDC) composite thermo-regulated fiber was uniform in diameter and smooth in surface, with a distinct core-sheath structure. And with the increase of core-sheath extrusion ratio (S: C), the diameter of the skin material gradually increased and the diameter of the core material gradually decreased. The breaking strength of the composite temperature-regulating fibers gradually increased, and the enthalpy gradually increased from 23 J / g Increase to 57J / g. In addition, PC16E2AC-P (AN-co-VDC) composite thermostat fiber has good thermal stability below 220 ℃. 300 cycles of cold / hot cycle test and 24 hours of extraction experiments show that the composite thermostat fiber has good thermal cycling stability and permeability. It is noteworthy that the phase transition temperature of PC16E2AC-P (AN-co-VDC) composite temperature control fiber is always around 35 ℃, indicating that it is expected to be used in the field of smart textiles.