PLA/PEG@SiO<sub>2</sub>超细纤维包装材料及其日间辐射降温性能

doi:10.11896/cldb.23070234

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Abstract Microfiber materials are widely used in the field of flexible packaging with both the printability and processability of paper, and the barrier and laminating properties of film, there is a key problem common to the field of flexible packaging materials and safety textiles: how to effectively reduce the internal temperature of the package to ensure the safety of materials. Based on this, this work proposes to introduce silicon dioxide (SiO₂) into poly lactic acid/poly ethylene glycol (PLA/PEG) blending system, then prepare PLA/PEG@SiO₂ microfiber material by melt blown, and test its physical structure, mechanical properties and radiative cooling properties. The results show that SiO₂ has a positive effect on the nucleation and crystallization of PLA, which can effectively improve the crystallization behavior of PLA; SiO₂ particles can be loaded on the fiber surface, which effectively improves the surface roughness (Sa) of the fibers; and as the mass ratio of SiO₂ is increased to 2.5%, the average diameter of the fibers increases to 7.11 μm, and the surface roughness increases to 12.7 μm. Benefit from the above microfiber structure characteristics of microfiber material samples emissivity and reflectivity up to 87.5% and 98.1%, the test temperature difference of up to 8.9 ℃, with excellent daytime radiation cooling performance. In addition, the PLA/PEG@SiO₂ microfiber material exhibits excellent shielding performance against liquids such as water, tea and coffee, exhibit good printability and shaped cutability, which is expected to provide a new flexible fiber material for daytime radiative cooling in the fields of flexible packaging and outdoor sports.

Key words： microfiber package polylactic acid (PLA) silicon dioxide (SiO₂) melt blown daytime radiation cooling nonwovens

Published: 25 October 2024 Online: 2024-11-05

CLC number:

TB484

Fund:Program for Science & Technology Innovation Talents in Universities of Henan Province (24HASTIT011), Major Science and Technology Projects in Henan Province (231100320200), Program for Science & Technology Innovation Talents of Zhongyuan University of Technology (K2023YXRC01), Program for Subject Backbone Teacher of Zhongyuan University of Technology (GG202422).

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	Articles by authors
	LI Han
	ZHANG Heng
	ZHAO Ke
	YANG Ziqiang
	GAN Yi
	QIN Zixuan
	ZHAI Qian
	ZHEN Qi

Cite this article:

LI Han,ZHANG Heng,ZHAO Ke, et al. PLA/PEG@SiO₂ Microfiber Packaging and Its Daytime Radiation Cooling Performance[J]. Materials Reports, 2024, 38(20): 23070234-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23070234 OR http://www.mater-rep.com/EN/Y2024/V38/I20/23070234

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