表面活性剂（surface active agent）.doc

表面活性剂（surface active agent） This article is contributed by gengyang123456 Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Chapter 1 surface chemistry and polymer chemistry Part 1 surface chemistry and surfactants School of chemistry and chemical engineering Interfacial phenomena Why is the water drop round rather than square? School of chemistry and chemical engineering Interfacial phenomena Why they can float on water Interface phenomenon is a ubiquitous phenomenon in nature. School of chemistry and chemical engineering Surface and interface (surface, and, interface) The uniform part of the physical and chemical properties of a system. Interface is the contact surface between phase and phase, which refers to the transition zone of about several molecular thicknesses in contact with two phases. If one of the phases is gas, this interface is often called the surface. Traditionally, the interface between liquid or solid and air is called a surface of liquid or solid. The common interfaces are gas-liquid interface, gas-solid interface, liquid-liquid interface, liquid-solid interface, and solid solid interface. School of chemistry and chemical engineering Surface and interface (surface, and, interface) Common interfacial gas-liquid interface School of chemistry and chemical engineering Surface and interface (surface, and, interface) Gas-solid interface School of chemistry and chemical engineering Surface and interface (surface, and, interface) Liquid-liquid interface School of chemistry and chemical engineering Surface and interface (surface, and, interface) Liquid-solid interface School of chemistry and chemical engineering Surface and interface (surface, and, interface) Solid solid interface School of chemistry and chemical engineering The essence of interfacial phenomena The surface layer molecules differ from the inner molecules in their environment. The simplest