Petković Gorana, Pasanec Preprotić Suzana, Vukoje Marina, Bolanča Mirković Ivana
University of Zagreb Faculty of Graphic Arts, Getaldićeva 2, 10000 Zagreb, Croatia.
Materials (Basel). 2024 Dec 5;17(23):5957. doi: 10.3390/ma17235957.
Adhesive modification with nanoparticles affects multiple adhesives properties, making it essential to evaluate and compare changes across all key characteristics-existing positive and limiting properties. This study investigates the impact of silica (SiO) and titanium dioxide (TiO) nanoparticles on the elasticity and aging resistance of PVAc adhesive. Tensile properties were determined according to ISO 527-3:2018, with Young's moduli of elasticity Ε, and stress-strain curves for neat PVAc, nano-SiO PVAc, and nano-TiO PVAc adhesive. Material toughness (UT), failure stresses σf, and failure strains εf were also calculated. After UV exposure (0, 48, and 96 h), according to ISO 9142:2003, samples were characterized by Fourier-transform infrared spectroscopy (FTIR). Analysis of variance (ANOVA) was performed to determine if there is a statistically significant difference in material toughness between neat PVAc and nano-modified PVAc adhesives, as well as changes in FTIR spectra of paper-adhesive samples before and after UV exposure. The Bonferroni post hoc test was used to identify specific group differences. The results showed that SiO nanoparticles improved PVAc elasticity by 9.15%, while TiO nanoparticles reduced elasticity by 44.47%. FTIR analysis revealed similar behavior in both nano-modified and neat PVAc adhesives after UV exposure, indicating that aging resistance was preserved with the addition of SiO or TiO.
用纳米颗粒进行粘合剂改性会影响多种粘合剂性能，因此有必要评估和比较所有关键特性（现有积极特性和限制特性）的变化。本研究调查了二氧化硅（SiO）和二氧化钛（TiO）纳米颗粒对聚醋酸乙烯酯（PVAc）粘合剂弹性和耐老化性的影响。根据ISO 527-3:2018测定拉伸性能，得到纯PVAc、纳米SiO-PVAc和纳米TiO-PVAc粘合剂的杨氏弹性模量E以及应力-应变曲线。还计算了材料韧性（UT）、破坏应力σf和破坏应变εf。根据ISO 9142:2003进行紫外线照射（0、48和96小时）后，用傅里叶变换红外光谱（FTIR）对样品进行表征。进行方差分析（ANOVA）以确定纯PVAc和纳米改性PVAc粘合剂之间在材料韧性上是否存在统计学上的显著差异，以及紫外线照射前后纸张-粘合剂样品的FTIR光谱变化。使用Bonferroni事后检验来识别特定组间差异。结果表明，SiO纳米颗粒使PVAc弹性提高了9.15%，而TiO纳米颗粒使弹性降低了44.47%。FTIR分析显示，紫外线照射后，纳米改性和纯PVAc粘合剂的行为相似，表明添加SiO或TiO后耐老化性得以保持。
