Nghiên cứu này đánh giá ảnh hưởng của chất chống oxy hóa đến các thông số vật lý và hóa học của hỗn hợp dầu cám và dầu hạt cải để sử dụng làm dầu cách điện cho máy biến áp phân phối. Các chất chống oxy hóa như dibutylhydrotoluen (hoặc 2,6-di-tecbutyl-4-metylphenol), tecbutylhydroquinon (hoặc 2-tec-butylbenzen-1,4-diol) và propyl gallat đã được sử dụng. | VNU Journal of Science Natural Sciences and Technology Vol. 37 No. 2 2021 78-83 Original Article Influence of Antioxidants on Physio-Chemical Properties of the Mixture of Rice Bran Oil and Rapeseed Oil for Transformers Nguyen Van Dung Pham Thanh Liem Trinh Quoc Anh Cantho University 3 2 street Cantho Vietnam Received 9 October 2020 Revised 19 February 2021 Accepted 28 June 2021 Abstract This study evaluated the effect of antioxidants on the physical and chemical parameters of a mixture of rice oil and rape-seed oil for using as insulating transformer oil. Antioxidants such as butylated hydroxytoluene tertiary butyl hydroquinone and propyl gallate were used. Experimental results showed that these three additives increased the oxidation stability index of the oil mixture but tertiary butyl hydroquinone had the greatest effect and increased the oxidation stability index by 4 times. However tertiary butyl hydroquinone insignificantly changes the physical and chemical parameters of the oil mixture except for the breakdown strength. This parameter of the oil mixture was increased by about 24 when tertiary butyl hydroquinone 0 3 wt was added. In addition it was observed that tertiary butyl hydroquinone inhibited the aging process of the oil mixture at high temperatures. With the presence of tertiary butyl hydroquinone the viscosity of the aged oil mixture only increased by 16 instead of up to 36 in case of without addition of the antioxidant under without oxygen or low concentration of oxygen. Keywords Rice oil Rape-seed Oil Transformers Ageing Antioxidants. _ Corresponding author. Email address nvdung@ https 2588-1140 78 . Dung et al. VNU Journal of Science Natural Sciences and Technology Vol. 37 No. 2 2021 78-83 79 Ảnh hưởng của chất chống oxy hóa đến đặc tính vật lý và hóa học của hỗn hợp dầu cám và dầu hạt cải dùng cho máy biến áp Nguyễn Văn Dũng Phạm Thanh Liêm Trịnh Quốc Anh Trường Đại học Cần Thơ Đường 3 2 Cần Thơ Việt Nam
