Technology And Mechanism Of High Durability Insulating Paper

Transformer as the core component of the power system, its safe operation is extremely important practical significance for China’s economic development. Transformer oil-paper insulation is a major component in the transformer insulation system. Insulating paper due to various factors and aging occur. Insulating paper directly determine the lifetime operational safety and life of the transformer. Currently, the research on the insulating paper focuses on aging detection insulating paper. For improving the insulating paper is less resistance to aging research.Aging the sheet article 10 ℃ use empirical formulas will accelerate the aging temperature to 180 ℃. At this temperature, by measuring the tensile strength of paper, folding, paper aging evaluate the degree of polymerization conditions. Concluded that folding is more sensitive and comprehensive evaluation parameters. By folding the evaluation criteria used in this experiment as paper aging detection.This paper studies the mechanism of the process and its high durability insulating paper mainly analyzes acetylated cellulose, and cellulose additives added heat acrylonitrile cyanoethylation modification process can affect the durability of the insulating paper. Using different means of modern instrumentation and analytical characterization of the homemade anti-aging insulating paper structure, thus revealing the mechanism to improve the durability of various types of modified methods. Articles using SEM, FT-IR, TGA and other modern testing methods, the study found, because the hydroxyl groups are acetylated cellulose substituted carboxyl group, which add to the mechanical properties of the sheet has damaging effects. The initial folding drop over 50%, the aging post-folding is not obvious. Add 10% acetylated cellulose reduces the moisture content of the paper under the paper state help to improve the material life in insulating oil. DCD absorb heat decomposition temperature additives for fiber protection. DCD and hydrogen bonding between cellulose, adding pulp decreased resulting in the initial folding is too large, the latter increase ineffective. After spraying DCD paper into the paper process to make a high initial folding, folding late to improve significantly. Cellulose cyanoethylation modified cellulose, cerium ammonium nitrate as initiator modified fiber, acrylonitrile fibers evenly distributed along the fiber surface hydroxyl groups are replaced, resulting in the initial folding paper decreased significantly. Was not added after the initiator-modified, cyanoethylated occurs mainly in the fiber fibrillation after interleaving to produce fine fibers, which results in the connection of adjacent fibers to improve the elasticity of the sheet of paper to improve the durability.