Bài viết Nghiên cứu tách Pectin, Cellulose từ cùi bưởi và bước đầu tổng hợp Carboxymethyl Cellulose tập trung nghiên cứu tách thu hồi Pectin, Cellulose từ cùi bưởi, sau đó, bước đầu tổng hợp Carboxymetyl Cellulose (CMC) từ Cellulose tách được. | VNU Journal of Science Natural Sciences and Technology Vol. 39 No. 2 2023 49-58 Original Article Extraction of Pectin and Cellulose from Grapefruit Peels and Production of Carboxymethyl Cellulose Ngo Van An Nguyen Thi Khanh Chi Tran Quang Khanh Duong Xuan Quan Pham Quang Trung Ngo Hong Anh Thu VNU University of Science 334 Nguyen Trai Thanh Xuan Hanoi Vietnam Received 16 March 2023 Revised 24 March 2023 Accepted 28 March 2023 Abstract The peel of grapefruit is a rich source of Pectin and Cellulose. This study focuses on the extraction of Pectin and Cellulose from grapefruit peels and the production of Carboxymethyl Cellulose CMC from extracted products. Firstly the extraction conditions of Pectin from grapefruit peels were optimized to obtain a high yield of Pectins such as extraction time and citric acid concentration. The weight purity and esterification degree of Pectin were also determined. The highest yield of Pectin is in the extraction conditions with pH for 60 minutes at 80 oC. The Pectin product is of purity at 29 427 g mol of weight with esterification degree. For extraction of Cellulose from grapefruit peels the highest yield of Cellulose is in the conditions with a pH of nitric acid for 70 minutes at 90 oC. After that the extracted cellulose was converted to Carboxymethyl Cellulose by Monochloroacetic acid etherification. The characterization of Pectin Cellulose and CMC is determined through Scanning Electron Microscopy SEM images and Infrared spectrums. The experimental results also showed that Pectin and Cellulose were successfully extracted from grapefruit peels and Carboxymethyl Cellulose was successfully produced from the extracted Cellulose. Keywords Grapefruit peels Pectin Cellulose Carboxymethyl Cellulose highest yield SEM infrared spectrum. D _ Corresponding author. E-mail address anhthu@ https 2588-1140 49 50 N. V. An et al. VNU Journal of Science Natural Sciences and .
