Among the rubber sealing materials for power equipment, nitrile rubber has poor resistance to vegetable insulating oil. In this paper, the effects of the changes of raw rubber system, vulcanizing system, reinforcing s...Among the rubber sealing materials for power equipment, nitrile rubber has poor resistance to vegetable insulating oil. In this paper, the effects of the changes of raw rubber system, vulcanizing system, reinforcing system, plasticizing system and anti-aging system of NBR on the properties of several vegetable insulating oils are systematically studied, and the key points of blending system of NBR with vegetable insulating oil are analyzed.展开更多
Traditional mineral insulating oils have problems such as environmental pollution and low fire resistance.Vegetable insulating oils are prepared from vegetable oils through refining and modification processes and have...Traditional mineral insulating oils have problems such as environmental pollution and low fire resistance.Vegetable insulating oils are prepared from vegetable oils through refining and modification processes and have high fire resistance and renewability.However,vegetable insulating oils have high viscosity and poor heat dissipation performance.Hybrid insulating oils can complement single insulating oils by mixing mineral and vegetable insulating oils.This paper investigates the compatibility between palm oil and mineral oil.COSMO calculations of triglyceride and mineral oil alkane molecules were performed using molecular simulations and the COSMO-RS model.We have carried out separate calculations of the molecular surface charge densities(σ-spectra)for four major triglycerides within the palm oil as well as for three major carbon 20 alkane molecules within the naphthenic mineral oil.We illustrate the polarity relationship between the glyceride molecules and alkane molecules of mineral oils and derive the principle of similar intercalation of the glyceride molecules with the alkane molecules of mineral oils from the microscopic point of view of the molecules.The findings suggest that palm oil and the mineral oil possess comparable forces between the molecules,which allows for stable blending.展开更多
文摘Among the rubber sealing materials for power equipment, nitrile rubber has poor resistance to vegetable insulating oil. In this paper, the effects of the changes of raw rubber system, vulcanizing system, reinforcing system, plasticizing system and anti-aging system of NBR on the properties of several vegetable insulating oils are systematically studied, and the key points of blending system of NBR with vegetable insulating oil are analyzed.
基金supported in part by the National Natural Science Foundation of China under Grant 52277139 and 52367014in part by the Specific Research Project of Guangxi for Research Bases and Talents under Grant 2020AC19010.
文摘Traditional mineral insulating oils have problems such as environmental pollution and low fire resistance.Vegetable insulating oils are prepared from vegetable oils through refining and modification processes and have high fire resistance and renewability.However,vegetable insulating oils have high viscosity and poor heat dissipation performance.Hybrid insulating oils can complement single insulating oils by mixing mineral and vegetable insulating oils.This paper investigates the compatibility between palm oil and mineral oil.COSMO calculations of triglyceride and mineral oil alkane molecules were performed using molecular simulations and the COSMO-RS model.We have carried out separate calculations of the molecular surface charge densities(σ-spectra)for four major triglycerides within the palm oil as well as for three major carbon 20 alkane molecules within the naphthenic mineral oil.We illustrate the polarity relationship between the glyceride molecules and alkane molecules of mineral oils and derive the principle of similar intercalation of the glyceride molecules with the alkane molecules of mineral oils from the microscopic point of view of the molecules.The findings suggest that palm oil and the mineral oil possess comparable forces between the molecules,which allows for stable blending.
