Lacruz Amado, Salvador Mireia, Blanco Miren, Vidal Karmele, Goitandia Amaia M, Martinková Lenka, Kyselka Martin, de Ilarduya Antxon Martínez
Color Center, S.A. Ptge. Marie Curie 3, Nau 6, 08223 Terrassa, Spain.
Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, ETSEIB, Diagonal 647, 08028 Barcelona, Spain.
Polymers (Basel). 2021 Oct 13;13(20):3526. doi: 10.3390/polym13203526.
Waterborne polyurethane-urea dispersions (WPUD), which are based on fully biobased amorphous polyester polyol and isophorone diisocyanate (IPDI), have been successfully synthesized obtaining a finishing agent that provides textiles with an enhanced hydrophobicity and water column. Grafting of trans-cyclohexanediol isobutyl POSS (POSS-OH) to the biobased polymer backbone has also been investigated for the first time and its properties compared to a standard chain extender, 1,3-propanediol (PDO). The chemical structure of WPUD has been characterized by Fourier-transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). The thermal properties have been evaluated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Mechanical properties have been studied by tensile stress-strain analysis. Moreover, the particle size, particle size distribution (PSD), and stability of developed waterborne dispersions have been assessed by dynamic light scattering (DLS), Z-potential, storage aging tests, and accelerated aging tests by analytical centrifuge (LUM). Subsequently, selected fabrics have been face-coated by the WPUD using the knife coating method and their properties have been assessed by measuring the water contact angle (WCA), oil contact angle (OCA), water column, fabric stiffness, air permeability, and water vapor resistance (breathability). Finally, the surface morphology and elemental composition of uncoated and coated fabrics have been studied by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. All of the synthesized polyurethane-ureas provided the coated substrates with a remarkable hydrophobicity and water column, resulting in a more sustainable alternative to waterproof coatings based on fluoropolymers, such as PTFE. Grafting POSS-OH to the polymeric backbone has led to textile coatings with enhanced hydrophobicity, maintaining thermal, mechanical, and water column properties, giving rise to multifunctional coatings that are highly demanded in protective workwear and technical textiles.
基于完全生物基无定形聚酯多元醇和异佛尔酮二异氰酸酯（IPDI）的水性聚氨酯 - 脲分散体（WPUD）已成功合成，得到一种能赋予纺织品增强疏水性和水柱性能的整理剂。首次研究了将反式环己二醇异丁基倍半硅氧烷（POSS - OH）接枝到生物基聚合物主链上，并将其性能与标准扩链剂1,3 - 丙二醇（PDO）进行比较。通过傅里叶变换红外光谱（FTIR）和核磁共振（NMR）对WPUD的化学结构进行了表征。通过差示扫描量热法（DSC）和热重分析（TGA）评估了热性能。通过拉伸应力 - 应变分析研究了力学性能。此外，通过动态光散射（DLS）、Z - 电位、储存老化试验以及分析离心机（LUM）的加速老化试验评估了所制备水性分散体的粒径、粒径分布（PSD）和稳定性。随后，使用刮刀涂布法用WPUD对面料进行表面涂布，并通过测量水接触角（WCA）、油接触角（OCA）、水柱、织物硬度、透气率和耐水蒸气性（透气性）来评估其性能。最后，分别通过扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）研究了未涂布和涂布织物的表面形态和元素组成。所有合成的聚氨酯 - 脲都赋予涂层基材显著的疏水性和水柱性能，从而成为基于氟聚合物（如PTFE）的防水涂层更可持续的替代品。将POSS - OH接枝到聚合物主链上产生了具有增强疏水性的纺织涂层，同时保持了热性能、力学性能和水柱性能，产生了防护工作服和工业用纺织品中高度需求的多功能涂层。
