论文标题
氧化铝的氨基酸驱动疏水性和在较宽的pH范围内的颗粒稳定泡沫的产生
Amino acid-driven hydrophobization of alumina and production of particle stabilised foams in a broader pH range
论文作者
论文摘要
研究了氨基酸（甘氨酸，L-谷氨酸，L-异亮氨酸和L-亮氨酸）与氧化铝表面的相互作用，以诱导部分疏水和超强的颗粒稳定泡沫的产生。通过机械量子模拟进行了这些氨基酸的评估，然后进行实验测试（泡沫性，Zeta电位，接触角和泡沫寿命测量值）。实验结果与模拟指出的趋势一致。所选的氨基酸与水性培养基中的氧化铝颗粒相互作用，在更广泛的pH范围内，导致表面疏水，这对于具有较高分子质量的氨基酸（异亮氨酸和亮氨酸）的氨基酸更为强烈。结果，产生了寿命更长（> 100小时）的超强泡沫，并从衰老现象中保留了泡沫微观结构。此外，所达到的泡沫在不同的pH值下是稳定的，开辟了开发大型多孔多陶瓷的新可能性，这可能会在高温下产生新颖的材料。
The interaction of amino acids (glycine, L-valine, L-isoleucine and L-leucine) with alumina surface was studied to induce partial hydrophobization and production of ultrastable particle-stabilised foams. The evaluation of these amino acids was carried out by mechano-quantum simulations followed by experimental tests (foamability, zeta potential, contact angle and foam lifetime measurements). The experimental results agreed with the trends pointed out by the simulations. The selected amino acids interact with alumina particles in aqueous media and in a broader pH range, leading to hydrophobization of surfaces, which was more intense for amino acids with higher molecular mass (isoleucine and leucine). As a consequence, ultrastable foams with a longer lifetime (> 100 hours) were produced and the foam microstructure was preserved from ageing phenomena. Moreover, the attained foams were stable at different pH, opening up new possibilities to develop macroporous multiphasic ceramics, which can result in novel materials for thermal insulation at high temperatures.
