TY - JOUR
T1 - Matte waterborne polyurethane fabric nanocoating with versatility via mono-layered montmorillonite nanosheets
AU - Ding, Zhengmao
AU - Li, Jie
AU - Xin, Wei
AU - Zhu, Jun
AU - Luo, Yunjun
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10
Y1 - 2021/10
N2 - With the change of people's aesthetic concepts, low-gloss coatings are becoming a new hotspot of interest. However, the low-gloss waterborne polyurethane (WPU) coatings reported by others to our knowledge are all single-functional coatings, which are difficult to meet the requirements of complex application environments. Herein, a series of low-gloss WPU nanocoatings with versatility via mono-layered organic montmorillonite (OMt) nanosheets is reported, and then applied to polyester fabric. Ultraviolet-visible (UV–vis) examination indicated that the OMt nanosheets made the as-prepared nanocoatings have unique UV-shielding performance. Thermogravimetric analysis (TGA) curves showed that the OMt nanosheets increased the thermal stability of the nanocoatings. Moreover, Fourier transforms infrared (FTIR) spectroscopy confirmed the existence of hydrogen bonds between OMt nanosheets and WPU molecular chains, which is the essential reason why the nanocoating had a matte level of 60° gloss of 1.9 GU on the fabric. Rougher surface topography of the nanocoating compared with pristine WPU coating and fabric observed by scanning electron microscopy (SEM) is the direct reason for the decrease in gloss. In addition, the influence of the times of scraping on the gloss of the coatings was also studied. Thus, our research may provide new insights for the multifunctional matte WPU coatings.
AB - With the change of people's aesthetic concepts, low-gloss coatings are becoming a new hotspot of interest. However, the low-gloss waterborne polyurethane (WPU) coatings reported by others to our knowledge are all single-functional coatings, which are difficult to meet the requirements of complex application environments. Herein, a series of low-gloss WPU nanocoatings with versatility via mono-layered organic montmorillonite (OMt) nanosheets is reported, and then applied to polyester fabric. Ultraviolet-visible (UV–vis) examination indicated that the OMt nanosheets made the as-prepared nanocoatings have unique UV-shielding performance. Thermogravimetric analysis (TGA) curves showed that the OMt nanosheets increased the thermal stability of the nanocoatings. Moreover, Fourier transforms infrared (FTIR) spectroscopy confirmed the existence of hydrogen bonds between OMt nanosheets and WPU molecular chains, which is the essential reason why the nanocoating had a matte level of 60° gloss of 1.9 GU on the fabric. Rougher surface topography of the nanocoating compared with pristine WPU coating and fabric observed by scanning electron microscopy (SEM) is the direct reason for the decrease in gloss. In addition, the influence of the times of scraping on the gloss of the coatings was also studied. Thus, our research may provide new insights for the multifunctional matte WPU coatings.
KW - Exfoliation
KW - Matte
KW - Montmorillonite
KW - UV-shielding
KW - Waterborne polyurethane
UR - http://www.scopus.com/inward/record.url?scp=85111491153&partnerID=8YFLogxK
U2 - 10.1016/j.porgcoat.2021.106420
DO - 10.1016/j.porgcoat.2021.106420
M3 - Article
AN - SCOPUS:85111491153
SN - 0300-9440
VL - 159
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
M1 - 106420
ER -