title: Preparation of cellulose nanocrystals from asparagus (Asparagus officinalis L.) and their applications to palm oil/water Pickering emulsion.
abstract: Nano cellulosic materials as promising emulsion stabilizers have attracted great interest in food industry. In this paper, five different sized cellulose nanocrystals (CNC) samples were prepared from stem of Asparagus officinalis L. using the same sulfuric acid hydrolysis conditions but different times (1.5, 2, 2.5, 3.0, and 3.5h). The sizes of these CNC ranged from 178.2 to 261.8nm, with their crystallinity of 72.4-77.2%. The CNC aqueous dispersions showed a typical shear thinning behavior. In a palm oil/water (30/70, v/v) model solution, stable Pickering emulsions were formed with the addition of CNC, and their sizes are in the range of 1-10μm based on the optical and confocal laser scanning microscopy (CLSM) observation. The CNC sample prepared at 3h hydrolysis time, showed a relative efficient emulsion capacity for palm oil droplets, among these CNCs. Other parameters including the CNC, salt, and casein concentrations on the emulsion stability were studied.
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, China; Limerick Pulp & Paper Centre, and Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: wangwenhang@tust.edu.cn.
authors.forename: Wenhang
authors.initials: W
authors.lastname: Wang
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, China.
authors.forename: Guanhua
authors.initials: G
authors.lastname: Du
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Li
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, China; Limerick Pulp & Paper Centre, and Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
authors.forename: Hongjie
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Limerick Pulp & Paper Centre, and Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
authors.forename: Yunduo
authors.initials: Y
authors.lastname: Long
authors.affiliation: Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin 300457, China; Limerick Pulp & Paper Centre, and Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: yonghao@unb.ca.
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Ni
mesh_terms: D027761:Asparagus Plant; D002482:Cellulose / Q000737:chemistry*; D004655:Emulsions; D005511:Food Handling; D006868:Hydrolysis; D053758:Nanoparticles / Q000737:chemistry*; D000073878:Palm Oil / Q000737:chemistry*; D018547:Plant Stems; D013464:Sulfuric Acids / Q000737:chemistry; D014867:Water / Q000737:chemistry*
chemical_list: D004655:Emulsions; D013464:Sulfuric Acids; D014867:Water; D000073878:Palm Oil; D002482:Cellulose; C033158:sulfuric acid
keywords: Asparagus wastes; CNC; Palm oil; Pickering emulsion