行走的“红绿灯”——拨水剂的制备

物体表面的润湿性能与其表面特殊的微观几何结构和理化性能相关,是固体表面一种重要的特征,可用接触角的量化值衡量。润湿性不仅影响自然界的动植物生命活动,在人类的日常生活中的应用也十分广泛。本科普实验通过展示自然界中荷叶、水黾等生物的超疏水表面,对超疏水原理进行阐述,以帮助人们了解生活中超疏水材料的由来和发展。然后,利用溶胶-凝胶法制备超疏水材料,并进行对比实验以展示疏水效果。最后,我们将基于靛蓝胭脂红变色的“红绿灯”实验在超疏水材料上进行绘画展示,让人们亲身感受化学之美、化学之趣,并以此激发其对化学的兴趣,引发人们对材料科学的探索和思考。

Research progress on supramolecular structures of asphalt

The properties of asphalt binder play an essential role in the design life of asphalt pavement.Analysis of asphalt mechanical behaviors based on the chemical structures provides the theoretical basis for the improvement of asphalt performance in service life.Intermolecular interactions have a significant impact on the macroscopic properties of asphalt,a colloidal material,resulting in the parameters characterizing asphalt molecular structures fail to directly connect with mechanical properties of asphalt.This paper introduces the supramolecular theory,presents a brief review of existing supramolecular models and research methods of asphalt,aiming to explore a new methodology for the investigation between asphalt microstructures and macroscopic properties.Results showed the supramolecular theory focuses on the intermolecular interactions,providing more accurate indicators for the investigation on the asphalt supramolecules.Supramolecular analysis of asphalt has proposed feasible methods and established favorable connections with asphalt properties,giving a new view of understanding asphalt microstructure and a new approach to capture mechanical behaviors of asphalt.