Soliman Soliman Mehawed Abdellatif, Abdelhakim Mohab, Sabaa Magdy Wadid
Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
BMC Chem. 2024 Oct 28;18(1):211. doi: 10.1186/s13065-024-01319-8.
Epoxy is a widely used thermosetting resin recognized for its exceptional performance in adhesives, coatings, and various other applications, attributed to its high tensile strength, stiffness, electrical performance, and chemical resistance. Epoxy-clay nanocomposites are extensively employed across diverse industries. The physical and chemical properties of these nanocomposites are influenced by the processing methods, clay modifiers, and curing agents used during their preparation. In this study, epoxy/nanoclay composites based on Diglycidyl Ether Bisphenol-A (DGEBA) will be cross-linked using Isophorone Diamine (IPD), a cycloaliphatic amine, and Triethylenetetramine (TETA), a linear aliphatic amine. The initial phase of the research will assess the impact of different types of cross-linkers, both individually and in combination at various molar ratios (such as Isophorone Diamine: Triethylenetetramine (IPA: TETA) / 25:75 and 75:25), on the compressive strength of the epoxy mortar. In the subsequent phase, the epoxy formulation with an Isophorone Diamine: Triethylenetetramine (IPD: TETA / 75:25), which demonstrates the highest compressive strength, will be selected for further investigation. This formulation will be used to evaluate the effects of different weight percentages (3%, 5%, and 7%) of organically modified montmorillonite (OMMT). The prepared epoxy composites will be characterized using a range of techniques, including Fourier Transform Infrared Spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM). The epoxy/nanoclay composite with an IPD: TETA / 75:25 and 3 wt % OMMT is expected to show the highest compressive strength, which is 94 MPa.
环氧树脂是一种广泛使用的热固性树脂，因其在粘合剂、涂料及各种其他应用中具有卓越性能而闻名，这归因于其高拉伸强度、刚度、电气性能和耐化学性。环氧粘土纳米复合材料在各个行业中广泛应用。这些纳米复合材料的物理和化学性质受制备过程中使用的加工方法、粘土改性剂和固化剂影响。在本研究中，基于双酚A二缩水甘油醚（DGEBA）的环氧/纳米粘土复合材料将使用异佛尔酮二胺（IPD，一种脂环族胺）和三亚乙基四胺（TETA，一种直链脂肪族胺）进行交联。研究的初始阶段将评估不同类型交联剂单独使用以及以各种摩尔比（如异佛尔酮二胺：三亚乙基四胺（IPA：TETA）/ 25:75和75:25）组合使用时对环氧砂浆抗压强度的影响。在随后阶段，将选择具有最高抗压强度的异佛尔酮二胺：三亚乙基四胺（IPD：TETA / 75:25）的环氧配方进行进一步研究。该配方将用于评估不同重量百分比（3%、5%和7%）的有机改性蒙脱土（OMMT）的效果。制备的环氧复合材料将使用一系列技术进行表征，包括傅里叶变换红外光谱（FT-IR）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）。预计具有IPD：TETA / 75:25和3 wt% OMMT的环氧/纳米粘土复合材料将显示出最高抗压强度，即94 MPa。
