Roll-position-controllable polypropylene super hydrophobic film or block material and their preparing method

Abstract

The present invention belongs to the field of polypropylene film or mass materials, especially relates to the rolling-angle controllable, super-hydrophobic, polypropylene film or mass and its preparation method. Solving polypropylene in solvent, and passing through processes of shearing, heat treatment, cooling, phase separation / crystallization, solidification, shaping, and drying at last, the films or masses with different morphological crystal networks are formed. With the minimum rolling ability on film or mass surface, water drops will roll, while the rolling angle is between 0 degree and1 degree, and with the maximum rolling ability, the drops will not roll, while the rolling angle is 90 degree or 180 degree. The contact angle between film or mass surface and water is larger than 150 degree. The present invention achieves the control of super-hydrophobic property and rolling angle of general polyolefin resin film, without any later modification by low-surface-energy materials (containing fluoride materials or silane, etc.), and has good surface-structure stability, wind and rain resistance, and chemical corrosion resistance.

Description

technical field The invention belongs to the field of polypropylene film or block materials, in particular to a superhydrophobic polypropylene film or block with controllable rolling angle and a preparation method thereof. Background technique Due to the broad prospects and technical significance in basic scientific research and industrial applications, research interest in superhydrophobic surfaces has continued (L.Jiang, R.Wang, B.Yang, T.J.Li, D.A.Tryk, A.Fujishima, K.Hashimoto , D.B.Zhu, Pure Appl.Chem.2000, 72, 73; P.Aussilous, D.QuLrL, Nature 2001, 411, 924; A.Nakajima, K.Hashimoto, T.Watanabe, Monatsh.Chem.2001, 132, 31.; R.N.Wenzel, Ind.Eng.Chem.1936, 28, 988; A.B.D.Cassie, Discuss.Faraday Soc.1948, 3, 11; A.B.D.Cassie, S.Baxter, Trans.Faraday Soc.1944, 40, 546- 551; G. Wolansky, A. Marmur, Langmuir 1998, 14, 5292; P.S. Swain, R. Lipowsky, Langmuir 1998, 14, 6772; S. Herminghaus, Europhys. Lett. 2000, 52, 165; W. Chen, Y .Fadeev, M.C.Heieh, D.Mner, J.Youngblood, T....

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Problems solved by technology

Such as some existing patents about building super-hydrophobic surfaces: the methods reported by Chinese Patent Publication No. 1415800 and Chinese Patent Publication No. 1379128 not only use silica gel or fluorine-containing reagents, but the method is complicated and difficult to control; the template reported by Chinese Patent Publication No. 1397668 The extrusion method uses an expensive and fragile template, which causes difficulties in application; the porous polyvinyl chloride film reported in Chinese Patent Publication No. 1621434A has to go through two scrapings, and the raw material price is relatively higher than that of polyolefin

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