Abstract: Broadly speaking, a nanomaterial is one with one of the three dimensions of the grains or particles, which may take the form of crystal, amorphous material, quasi-crystal or interface layer structure, smaller than 100nm. So, special volume effects, surface effects, quantum size effects and macroscopic quantum tunnel effects are evident, by which the nano-materials are used widely in many fields. As early as 20 years ago, the nano-particles started to be introduced into the wet end retention system in papermaking, with a good effect. In recent years, the nano-particle retention system in wet end becomes a focus of the paper retention technology, with the following advances: it suits to the high-speed paper machine and neutral papermaking, as the trend of the development of papermaking; it can improve the production efficiency and product quality, and reduce production costs. So, it can be said that the nano-particle retention system is the trend of development in wet retention technology. In this paper, the mechanism of wet retention and the advantages of the nano-particle retention technology are introduced first, and then, the achievements of the nano-particle retention system and the new products used in industry are discussed. At last, the current methods in the nano-particle retention system field and its future are reviewed.
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Received: 13 August 2010
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Corresponding Authors:
Xiao-Lei SONG
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