Recently, the increasing demands of energy saving and various human thermoregulation equipment give rise to the resurgence of functional fabrics. Therefore, the fibers/microfibrilar bundles with thermal management ability, which can be woven into various functional fabrics, have aroused much attention. Unfortunately, reported techniques to fabricate such functional fibers/microfibrilar bundles often suffer from the low fabrication efficiency and high cost. Herein, a highly efficient, continuous but facile approach was employed to fabricate high density polyethylene microfibrilar bundles (PMBs) containing oriented microchannels. The as-prepared PMBs can be woven into fabrics with outstanding performances (e.g., thermal insulation, breathability, hydrophobicity, etc.), showing promising application in large-area personal thermal management. That is, it can not only prevent heat loss of human body to realize passive heating in indoor circumstance, but also can insulate the sunlight radiation to avoid the excessive rise of skin temperature in outdoor circumstance. This work proposes a promising strategy to fabricate multifunctional polymer microfibrilar bundles for wearable personal thermal management fabric by using common melt processing method.

近来，对节能和各种人类温度调节设备的日益增长的需求使功能性织物重新流行。因此，具有热管理能力的纤维/微纤维束可以被编织成各种功能性织物，引起了极大的关注。不幸的是，报道的制造这种功能性纤维/微纤维束的技术经常遭受制造效率低和成本高的困扰。在本文中，采用高效，连续但容易的方法来制造包含定向微通道的高密度聚乙烯微纤维束（PMB）。所制备的PMB可以织成具有出色性能（例如，隔热性，透气性，疏水性等）的织物，在大面积个人热管理中显示出广阔的应用前景。那是，它不仅可以防止人体热量散失，在室内实现被动取暖，而且可以隔离阳光辐射，避免在室外使用时皮肤温度过度升高。这项工作提出了一种有前途的策略，可以通过使用常见的熔融加工方法来制造用于可穿戴个人热管理织物的多功能聚合物微纤维束。