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

A polypropylene film and rolling angle technology, applied in the field of super-hydrophobic polypropylene film or block and its preparation, can solve the problems of high raw material price, difficult application, high price, etc., and achieve simple equipment, low cost and easy operation. Effect

Inactive Publication Date: 2007-11-14
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] After the isotactic polypropylene pellets are cleaned, add decahydronaphthalene to prepare a solution with a concentration of 3 wt%, place it in a sealed glass tube, heat it to about 160°C, and stir it magnetically until it completely dissolves into a transparent and uniform solution. In order to accurately study the shear dependence of contact angle and rolling angle, the solution was introduced into the quartz shear cell of CSS-450 high temperature shear heat station (Linkam Scientific Instruments Ltd., UK), so that the shear and temperature conditions can be precisely controlled . The quartz parallel plate is set up, the plate spacing is 30 microns, the solution is placed on the parallel plate, and the temperature is raised to 110°C; the solution is cooled from 110°C to 40°C at a rate of 15°C / min, and then the application rate is 5s -1 The shearing time is 20s, and it is kept at 40°C until the structure is completely formed. Under such conditions, the polypropylene p...

Embodiment 2

[0039] Use the solution configuration method, experimental equipment and sample drying method of Example 1. Put the 5wt% solution on the parallel plate and raise the temperature to 120°C; -1 While shearing, the temperature is lowered from 120°C to 65°C at a rate of 10°C / min, and then the shear is stopped and kept at 65°C until the structure is completely formed. Under such conditions, the polypropylene phase is separated from the solution, and at the same time The polypropylene in the propylene phase crystallizes to form a crystalline network structure with different morphology of the polypropylene film. The contact angle between the obtained polypropylene film and water is 161° (as shown in Figure 4), and the rolling angle is that the inclination angle of the substrate is less than 1°, and water droplets will roll off (as shown in Figure 5). The polypropylene film is composed of leaf-shaped polypropylene microcrystals as the basic unit to form a network structure, with holes...

Embodiment 3

[0041] With the solution configuration method, experimental equipment and sample drying method of embodiment 1, the solvent used is changed into a mixed solvent (volume ratio of 3: 2) of xylene and decahydronaphthalene, and the 10wt% solution is placed on a parallel plate, and the temperature rises to 100°C; the treatment process is to cool the solution from 100°C to 70°C at a rate of 15°C / min, and then apply at a rate of 2s -1 The shearing time is 10s, and then the temperature is lowered to 40°C at a rate of 15°C / min. Propylene crystallized to form a crystalline network structure with different morphology of the polypropylene film. The contact angle of the obtained polypropylene film with water is 155°, and the rolling angle is 32°. The polypropylene film is composed of crystallized microspheres and leaf-shaped polypropylene microcrystals as basic units to form a network structure, with pores of 2 to 40 microns. , wherein the crystallized polypropylene microspheres have a di...

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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 and 1 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 [0001] 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 [0002] 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08J5/18
Inventor 韩志超姚咏华董侠洪崧
Owner INST OF CHEM CHINESE ACAD OF SCI
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