Length is proportional to the size of the line MN with F's surface tension meter. Can be written as F = σL or σ = F / L. The ratio σ instrument called surface tension coefficient, its unit commonly dyn / cm. Numerically equal to the coefficient of surface tension of liquid instrument looks somewhat adjacent to each other between the two traction unit length. Liquid surface tension meter coefficient = film appearance can / film surface tension meter area = F / (2 * segment length taken). Liquid surface tension coefficient and the nature of the instrument, the size has nothing to do with the surface. Beautiful lotus lightness finds the angle of water droplets surface tension meter can, down the hill from the lotus leaf drops can remove dirt and bacteria on adsorption, scientists call this phenomenon the leaves of the "self-cleaning effect." or "lotus effect." 1997 German botanist Professor William Bass Lott inspiration from the successful production of easy-to-clean surface buildings and transportation coatings. Recently, researchers at the University of Michigan through the development of theoretical models, the first successful nano hairy structure and chemical composition and microstructure separated, the essence of the principle of self-cleaning lotus effect research. When water droplets fall on a lotus leaf surface free energy tension test, the leaves with water drops formed between a height of the contact angle (greater than 90 degrees), so as to gather pearls without diffusion. Typically, human skin has a slight hydrophobicity, the contact angle is about 90 degrees, and the contact angle approaches 170 degrees lotus leaf, leaf surface extremely hydrophobic. But scientists have found that, despite the rain actually touching the leaves little tension meter, water droplets fall is not without friction, water droplets away dirt and bacteria on the leaves, and act as a "self-cleaning" function. Scientists for the first time the hairy leaves of the nano-structure and micro-structure and chemical composition separated. They found that, in addition to containing lotus leaf surface wax component, two structures "lotus effect" and the leaves of the related, one is raised micron, one is hairy nanoscale structures. The contact angle of the two structures containing lotus 142 degrees, the leaves contain only the structure of the contact angle of 126 microns of the surface tension of the surface energy tester, the contact angle alone waxy surface containing only 74 degrees. Scientists believe that hairy nanoscale structure increases the contact angle of 16 degrees, the two structures are the main causes of "lotus effect". "Lotus effect" as a good model that can be used to study many areas, such as lotus effect on the production of coatings can be easy to clean the surface of the house or building, the future lotus effect will have a more broad prospects for development The contact angle tension meter test _ _ ShengDing tension meter instrument provided by the Dongguan Sheng Ding Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) strong, credible, in Dongguan, Guangdong specialized instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead ShengDing instrument and you hand into the brilliant, for a better future!