在这项研究中,探讨了高长径比纳米钙矾石对光固化环氧丙烯酸酯树脂的影响。使用γ-氨基丙基三乙氧基硅烷(KH-550)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)对纳米钙矾石样品进行了改性。然后,3重量%或6重量%KH-550改性,KH-570改型,将未改性的纳米钙矾石样品通过超声处理和机械搅拌分散到树脂中。通过扫描电子显微镜(SEM)分析了纳米钙矾石在KH-550或KH-570上的接枝效果,傅里叶变换红外(FTIR)光谱,X射线衍射(XRD)和热重(TG)分析。结果表明,KH-550和KH-570已成功接枝到纳米钙矾石表面。此外,这项研究还侧重于复合材料的粘度变化,收缩,抗拉强度,和断裂伸长率。结果表明,未修饰的剂量增加,KH-550改型,和KH-570改性的纳米钙矾石导致复合材料的粘度增加,同时减少收缩。在相同的剂量下,含有KH-570改性的纳米钙矾石的可光固化树脂表现出较低的收缩率和较高的拉伸强度。从拉伸断裂表面的分析,据观察,与KH-550修饰和未修饰的变体相比,KH-570改性纳米钙矾石在光固化环氧丙烯酸酯树脂中具有优异的分散性。值得注意的是,当KH-570改性纳米钙矾石的量为3重量%时,复合材料的最高拉伸强度为64.61MPa,与空白样品相比,增加了72.57%。此外,KH-570改性纳米钙矾石作为填料的掺入为提高光固化环氧丙烯酸酯树脂复合材料的性能提供了新的视角。
In this study, the impact of the addition of high-aspect-ratio nano-ettringite to photocurable epoxy acrylate resin was explored. The nano-ettringite samples were modified using γ-Aminopropyltriethoxysilane (KH-550) and γ-methacryloxypropyl trimethoxy silane (KH-570). Then, 3 wt% or 6 wt% KH-550-modified, KH-570-modified, and unmodified nano-ettringite samples were dispersed into resin via ultrasonic treatment in conjunction with mechanical stirring. The grafting effects of nano-ettringite onto KH-550 or KH-570 were analyzed through scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and thermogravimetric (TG) analysis. The results demonstrate that KH-550 and KH-570 have been successfully grafted onto the surface of nano-ettringite. In addition, this study also focuses on the variations of composite materials in the viscosity,
shrinkage, tensile strength, and elongation at break. The results indicate that increased dosages of unmodified, KH-550-modified, and KH-570-modified nano-ettringite led to increased viscosity of the composite while reducing
shrinkage. At the same dosage, the photocurable resin containing KH-570-modified nano-ettringite demonstrated a lower
shrinkage and a higher tensile strength. From the analysis of tensile fracture surfaces, it was observed that compared to the KH-550 modified and unmodified variants, the KH-570 modified nano-ettringite exhibits superior dispersibility in photocurable epoxy acrylate resin. Notably, when the amount of KH-570-modified nano-ettringite was 3 wt%, the highest tensile strength of the composite was 64.61 MPa, representing a 72.57% increase compared to the blank sample. Furthermore, the incorporation of KH-570-modified nano-ettringite as a filler provides a new perspective for improving the performance of photocurable epoxy acrylate resin composites.