Cei Noemi, Canesi Ilaria, Nejrotti Stefano, Montalbano Giorgia, Darjazi Hamideh, Piovano Alessandro, Bonomo Matteo, Fina Alberto, Yecora Beatriz, Perez Angelica, Barolo Claudia, Gerbaldi Claudio, Spinelli Daniele
Next Technology Tecnotessile, Via del Gelso 13, 59100 Prato, Italy.
Department of Chemistry, NIS Interdepartmental Center and INSTM Ref. Centre, University of Torino, 10125 Turin, Italy.
Polymers (Basel). 2024 Dec 7;16(23):3439. doi: 10.3390/polym16233439.
Polyvinyl butyral (PVB) is a high-performance thermoplastic polymer, commonly used as an interlayer material in laminated safety glass for the automotive and architectural sectors. Currently, there is no end-of-life cycle program for a substantial amount of PVB film, which mainly ends up in landfills. According to a circular approach, PVB can be revalorized after efficient separation and recovery from glass. Thus, the aim of this work was to develop functional coatings for textile applications using recycled PVB (re-PVB), also in combination with an organic UV absorber, to enable the production of UV-protective final coated fabrics. The re-PVB-coated fabrics were obtained through an industrially scalable spraying process (leading to an average weight increase of 20 ± 3 wt.%), and the effectiveness of the application was evaluated according to different characterization techniques, such as FT-IR (Fourier transform-infrared) spectroscopy, SEM (scanning electron microscope), a washing test, a mechanical test, a thermo-physiological test, and the ultraviolet protection factor (UPF). Based on the results, the re-PVB-coated fabrics appeared stable upon washing (with a negligible weight loss compared to the average amount of coating) and effective in UV protection (with a final UPF being four times higher and a reduced UVA transmittance from 2.0% to 0.6%).
聚乙烯醇缩丁醛（PVB）是一种高性能热塑性聚合物，通常用作汽车和建筑领域夹层安全玻璃的中间层材料。目前，大量的PVB薄膜没有生命周期结束计划，这些薄膜主要最终被填埋。根据循环利用方法，PVB在从玻璃中有效分离和回收后可以实现再利用。因此，这项工作的目的是开发用于纺织品应用的功能性涂层，使用回收的PVB（re-PVB），还结合有机紫外线吸收剂，以生产具有紫外线防护功能的最终涂层织物。通过工业规模的喷涂工艺获得了re-PVB涂层织物（平均重量增加20±3 wt.%），并根据不同的表征技术评估了应用效果，如傅里叶变换红外（FT-IR）光谱、扫描电子显微镜（SEM）、洗涤试验、机械试验、热生理试验和紫外线防护系数（UPF）。根据结果，re-PVB涂层织物在洗涤后表现稳定（与平均涂层量相比重量损失可忽略不计），并且在紫外线防护方面有效（最终UPF提高了四倍，UVA透过率从2.0%降至0.6%）。
