Article (Scientific journals)
Preparation of cellulose nanocrystals from purple sweet potato peels by ultrasound-assisted maleic acid hydrolysis
Zhu, Shunshun; Sun, Hongnan; Mu, Taihua et al.
2023In Food Chemistry, 403, p. 134496
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Keywords :
Cellulose nanocrystals; Ultrasound-assisted maleic acid hydrolysis; Zeta potential; Chemical structure; Thermal stability; Crystallinity
Abstract :
[en] This study aimed at realizing high value utilization of purple sweet potato (PSP) peels. Firstly, ultrasonic assisted ethanol method was used to extract anthocyanins from PSP peels, and the individual anthocyanin composition and antioxidant activity were analyzed. Then the technological parameters of preparing cellulose nanocrystals (CNCs) by ultrasonic-assisted maleic acid hydrolysis were optimized, and Zeta-potential, chemical structure, thermal stability and crystallinity of CNCs were analyzed. Results showed the optimal technological parameters were as follows: the ratio between PSP peel residues and 75 wt% maleic acid was 1:10 (g/mL, W/W), and ultrasonic-assisted hydrolysis was carried out at 60℃ for 1 h, followed by 120℃ for 2.5 h. The yield and Zeta-potential of CNCs were 8.17 % and −57.7 mV, respectively. The chemical structure and physical properties of CNCs were similar to those of commercial CNCs. In conclusion, ultrasound-assisted maleic acid hydrolysis has great potential to realize the industrialization of CNCs.
Disciplines :
Chemistry
Author, co-author :
Zhu, Shunshun
Sun, Hongnan
Mu, Taihua
Li, Qiang
Richel, Aurore  ;  Université de Liège - ULiège > TERRA Research Centre > Smart Technologies for Food and Biobased Products (SMARTECH)
Language :
English
Title :
Preparation of cellulose nanocrystals from purple sweet potato peels by ultrasound-assisted maleic acid hydrolysis
Publication date :
March 2023
Journal title :
Food Chemistry
ISSN :
0308-8146
eISSN :
1873-7072
Publisher :
Elsevier BV
Volume :
403
Pages :
134496
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 October 2022

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