大学化学 >> 2022, Vol. 37 >> Issue (5): 2112004.doi: 10.3866/PKU.DXHX202112004

所属专题: 第2届全国大学生化学实验创新设计竞赛

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行走的“红绿灯”——拨水剂的制备

孙贝贝(), 王阳慧, 高申虹   

  • 收稿日期:2021-12-01 录用日期:2022-01-06 发布日期:2022-04-15
  • 通讯作者: 孙贝贝 E-mail:wangyanghui123@163.com
  • 作者简介:孙贝贝, Email: wangyanghui123@163.com

Walking "Traffic Light": Preparation of Superhydrophobic Materials

Beibei Sun(), Yanghui Wang, Shenhong Gao   

  • Received:2021-12-01 Accepted:2022-01-06 Published:2022-04-15
  • Contact: Beibei Sun E-mail:wangyanghui123@163.com

摘要:

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。

关键词: 表面润湿性, 超疏水材料, 靛蓝胭脂红, 科普实验, 趣味实验

Abstract:

The wettability of the solid surface is related to its microgeometry and physicochemical properties, which is determined by both the specific micro-geometry structure of the surface and the physicochemical properties of surface chemicals. The wettability is an important feature of the solid surface and can be measured quantitatively by the contact angle. It not only directly affects life activities of both animals and plants in nature, but also plays an important role in both human's daily life and industrial and agricultural production. The wettability of a solid surface can be measured by the contact angle of water. This popular science experiment discusses the superhydrophobic surface of lotus leaf, water strider and other living things, and expounds the principle of superhydrophobicity, so as to help people understand the origin and development of superhydrophobic materials in life. The superhydrophobic material was prepared by sol-gel method, and its superhydrophobic property was compared with the control surface. Finally, we carried out "traffic light" experiment by employing indigo carmine on the superhydrophobic material for people to feel the beauty and interest of chemistry, so as to stimulate their interest in chemistry, and further lead people to explore and think about the material science.

Key words: Surface wettability, Superhydrophobic material, Indigo carmine, Popular science experiment, Interesting experiment

MSC2000: 

  • G64