High-property polyurethane nanometer composite flexible pipe and preparation method thereof

Abstract

The invention provides a high-property polyurethane nanometer composite flexible pipe and a preparation method thereof. The high-property polyurethane nanometer composite flexible pipe is prepared by the following steps of using a composite fiber strip with diameter of 40 to 60cm as a reinforcing layer, using a thermoplastic polyurethane monomer, a modified silicon and cerium nanometer material, rosin resin and epoxy resin as an inner layer and an outer layer, and performing the primary extrusion and forming. The high-property polyurethane nanometer composite flexible pipe has the advantages that a sandwich structure is formed; the composite fiber strip blank is weaved and modified by a circular weaving machine through using aramid fiber as warp yarns, and using aramid fiber and carbon fiber as weft yarns, the modified silicon and cerium nanometer material is prepared by using gamma-glycidoxy propyl trimethoxy silane to activate the surface of the silicon and cerium nanometer material, the silicon and cerium nanometer material has a three-layer core and shell structure, the inner core is of nanometer silicon dioxide, the middle layer is of nanometer cerium dioxide, and the outermost shell is of nanometer titanium dioxide; the compressive strength is 5.2 to 6.4MPa, the stripping strength is 130 to 155N / 25mm, and the change rate of stripping strength is 2% to 5%; the compressive strength is high, the anti-aging property is excellent, the stripping strength is high, and the like; the processing technology is simple and convenient; the composite flexible pipe is mainly used for the transportation of marine petroleum, natural gas and industrial water and the supply of ocean oil.

Description

technical field [0001] The invention relates to a high-performance polyurethane nanocomposite hose, which is mainly used to prepare a polyurethane nanocomposite hose with high compressive strength, excellent aging resistance and high peel strength, and is mainly used for offshore oil, natural gas, industrial water transportation and ocean oil. Supplies belong to the field of new material manufacturing. Background technique [0002] In recent years, my country's hose industry has made great progress. Polyurethane composite hoses used for offshore oil, natural gas, industrial water transportation and offshore oil supply are used in harsh environments for a long time, requiring high compressive strength, excellent aging resistance, and high peel strength. [0003] At present, the composite hose produced in China includes an outer protective layer, a middle reinforcement layer, and an inner leak-proof layer. The braided single fiber tape is used as the reinforcement layer, and...

AI Technical Summary

Problems solved by technology

The hose produced in this way has low compressive strength, is easy to age, and has poor peel strength between the hose blank and the inner and outer layers.

[0004] Chinese patent 201410137891.5 discloses a high-strength fiber double-layer interwoven composite hose and its production method. The hose blank is braided by double-layer fibers, and then the inner and outer surfaces of the double-layer blank are formed and coated with a polymer adhesive compound. Although the patent has the advantages of good flexibility and high compressive strength of the tube blank, it has disadvantages such as poor aging resistance and low peel strength, which reduce the service life of the hose; Chinese patent 200910229472.3 discloses wear-resistant rubber polyurethane composite hose, hose The steel ring is used as the pressure-bearing layer, and a nylon fiber protective layer is added outside the pressure-bearing layer. The inner wall of the pipe is cast from rubber polyurethane material through a mold, and finally the hose is vulcanized for 24 hours. The processing technology of the polyurethane composite hose is complex, and the polyurethane composite hose produced The quality of the hose is heavy, and it is not easy to transport and install; Chinese patent 201010271207.4 discloses a manufacturing method for a large-length high-pressure wear-resistant rubber-plastic hose, using fiber tape blanks as the middle layer of the hose, mixing polyurethane and inorganic materials evenly through co-extrusion compounding The polyurethane hose is prepared by one-time extrusion molding of the machine. Although this invention solves the shortcomings of the hose, such as complicated process flow, low production efficiency, and poor aging resistance, the compressive strength and peel strength of the hose are not high.