Basalt fiber hybrid composite pipe and preparation method thereof
A basalt fiber, composite pipe technology, applied in the direction of pipes, rigid pipes, pipeline protection, etc., can solve the problems of poor corrosion resistance of composite pipes, and achieve the effects of low cost, excellent corrosion resistance and good corrosion resistance.
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[0041] The present invention also provides a method for preparing the basalt fiber hybrid composite pipe described in the above technical solution, comprising the following steps:
[0042] (1) Spraying the resin raw material on the surface of the tubular mold to obtain a resin layer;
[0043] (2) the outer surface of the resin layer obtained in the step (1) is sequentially first wet-wound basalt fiber, wet-wound glass fiber and second wet-wound basalt fiber to obtain a molded composite pipe;
[0044] (3) curing the formed composite pipe obtained in the step (2) to obtain a basalt fiber hybrid composite pipe.
[0045] In the invention, the resin raw material is sprayed on the surface of the tubular mold to obtain the resin layer. The present invention has no special limitation on the specific conditions of the spray coating, as long as the resin layer can be obtained. In the present invention, the diameter of the tube embryo is preferably 20-200 cm.
[0046] In the present inv...
Embodiment 1
[0058] figure 1 It is a structural schematic diagram of the basalt fiber hybrid composite pipe obtained in Example 1 of the present invention, wherein 1 is a resin layer (0.5mm), 2 is the first basalt fiber layer (2mm), 3 is a glass fiber layer (4mm), and 4 is The second basalt fiber layer (3 mm), the resin layer is an epoxy resin-basalt scale resin-rich layer.
[0059] The preparation process of the basalt fiber hybrid composite pipe in this embodiment is as follows:
[0060] Prepare the glue according to the lining resin layer raw materials, stir slowly and fully for 20 minutes, and spray the mixed resin layer raw materials on the surface of the tubular mold at an ambient temperature of 20°C to form a resin layer.
[0061] According to the structure of the epoxy resin system, the glue is mixed, and the mixer is continuously stirred at a speed of 300 rpm for 8 minutes to obtain a mixed glue, and the vacuum is placed in an environment of 20 ° C to remove air bubbles.
[0062...
Embodiment 2
[0067] Similar to the structure and preparation method of the basalt fiber hybrid composite pipe obtained in Example 1, the only difference is that the resin layer is a phenolic resin-basalt scale resin-rich layer, the resin layer is 0.5mm, the first basalt fiber layer is 2mm, and the glass fiber layer is 5mm, and the second basalt fiber layer is 2mm.
[0068] The relevant parameters of the basalt fiber hybrid composite pipe prepared in Example 2 were tested, and the results are as follows: the density is 2.19g / cm 3 , the resin content is 31.15%, the axial tensile strength is 121MPa, the hoop tensile strength is 278MPa, the bending strength is 328MPa, the maximum working internal pressure is 23Mpa, soaked in the following medium for 10 days, the above strength retention rate is as follows: distilled water : >99.9%, acetone: >99.7%, saturated sodium carbonate solution: >97.3%, 10% sodium hydroxide solution: >87.5%, 10% ammonia solution: >85.7%, 5% hydrochloric acid: >91.2%, 5% ...
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Abstract
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