Necolau Mădălina Ioana, Bălănucă Brînduşa, Frone Adriana Nicoleta, Radu Iulia Nicoleta, Grădişteanu-Pîrcălăbioru Graţiela, Damian Celina Maria
Advanced Polymer Materials Group, National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania.
Department of Organic Chemistry "C. Nenitescu", National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania.
ACS Omega. 2024 Feb 9;9(7):8297-8307. doi: 10.1021/acsomega.3c09059. eCollection 2024 Feb 20.
Epoxy nanocomposites derived from linseed oil, reinforced with graphene oxide (GO) and montmorillonite (MMT) nanostructures, were synthesized. The nanohybrids were developed by enriching the structure of MMT and GO with primary amines through a common and simplified method, which implies physical interactions promoted by ultrasonic processing energy. The influence of the new nanoreinforcing agents along with neat ones on the overall properties of the biobased epoxy materials for coating applications was assessed. Interface formation through surface compatibility was contained by the lower values of activation energy calculated from differential scanning calorimetry (DSC) curves, along with a consistent 70% increase in the cross-linking density when amine-modified MMT was used. Thermomechanical characteristics of the biobased epoxy nanocomposites were explained through the interaction of the functional groups over the curing process of epoxidized linseed oil (ELO), giving a 15 °C higher value increase. Furthermore, the low surface energy values suggested an intrinsic antibacterial activity, as proved by a significant decrease of CFU against bacterial strains on the 0.25% reinforced coatings.
合成了由亚麻籽油衍生的、用氧化石墨烯（GO）和蒙脱石（MMT）纳米结构增强的环氧纳米复合材料。通过一种常见且简化的方法，用伯胺富集MMT和GO的结构来制备纳米杂化物，这意味着由超声处理能量促进的物理相互作用。评估了新型纳米增强剂以及纯纳米增强剂对用于涂料应用的生物基环氧材料整体性能的影响。通过差示扫描量热法（DSC）曲线计算出的较低活化能值，以及使用胺改性MMT时交联密度一致提高70%，表明通过表面相容性形成了界面。通过环氧亚麻籽油（ELO）固化过程中官能团的相互作用，解释了生物基环氧纳米复合材料的热机械特性，其值提高了15℃。此外，低表面能值表明具有内在抗菌活性，这在0.25%增强涂层上对细菌菌株的CFU显著降低得到了证明。
