Adhesive dipping glue for preparing CF/UHMWPEF composite material

Abstract

The invention relates to an adhesive dipping glue for preparing a CF / UHMWPEF composite material. The adhesive dipping glue is suitable for a CF / UHMWPEF composite material used for repairing and reinforcing external damage defects of a metal pipeline. A component A and a component B are mixed according to the weight ratio of 3: 1. The component A of the adhesive dipping glue comprises: (A) 80%-90% (by weight) of bisphenol A epoxy resin; and (B) 10%-20% (by weight) of polypropylene oxide ether glycol. The component B comprises: (C) 90%-95% (by weight) of aliphatic amine; and (D) 5%-10% (by weight) of fumed silica. The prepared composite material has the advantages that interlayer combination is tight, the specific strength and the specific modulus are close to those of a metal pipe body material, and the composite material is used for reinforcing outer defects of a metal pipeline and can be integrated with the pipeline to jointly bear pressure in the pipeline. Under the condition that the number of layers is the same, the tensile and shear performance of the prepared CF / UHMWPEF composite material is equivalent to the performance of a pure carbon fiber cloth layer composite material, but the cost is relatively low.

Description

technical field [0001] The invention relates to a sticking and dipping glue for preparing a CF / UHMWPEF hybrid composite material, in particular to a sticking and dipping glue suitable for the CF / UHMWPEF composite material used for repairing and reinforcing external damage defects of metal pipes. The CF in the present invention is a unidirectional carbon fiber cloth, and the UHMWPEF is an ultra-high molecular weight polyethylene fiber woven cloth. Background technique [0002] As an efficient and fast new repair technology, fiber composite material repair and reinforcement technology has been applied in the maintenance and overhaul of oil and gas pipelines. Compared with repair techniques such as welding, pipe replacement, and fixtures, its advantage is that it does not require welding and does not fire, which greatly reduces the risk of operation, and it can be repaired under pressure when the maintenance period is not over and the transmission cannot be stopped. This appro...

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Problems solved by technology

[0005] Although the use of glass fiber and carbon fiber composite materials at home and abroad has achieved good results in the repair of oil and gas pipeline defects, due to the advantages and disadvantages of different fiber properties, the application of fiber composite repair and reinforcement technology is limited to a certain extent, such as glass Although the fiber is cheap and has good adhesion to the resin matrix, its specific strength and specific modulus are low, and its matching with metal pipes is poor; although carbon fiber has high specific strength and specific modulus, its elongation low, and most of them need to be imported, and the price is relatively expensive; while the UHMWPE fiber matches the metal matrix in terms of specific strength, specific modulus, and elongation at break, and its price is relatively low

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