TY - JOUR
T1 - Effect of surfactants on the interfacial behaviors of diacylglycerol-based solid lipid nanoparticles and physical stability of W/O emulsion
AU - Chen, Dechu
AU - Yu, Yasi
AU - Lee, Yee Ying
AU - Chen, Nannan
AU - Wang, Yong
AU - Qiu, Chaoying
N1 - Funding Information:
This research was funded by the Department of Science and Technology of Guangdong Province under grant ( 2022B0202010003 ) and the National Natural Science Foundation of China under grant ( 32101972 ).
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/10/20
Y1 - 2023/10/20
N2 - The influence of surfactants (Span 80, Span 60, PGPR and sodium caseinate) on the stability of W/O emulsions stabilized by diacylglycerol (DAG)-based solid Lipid nanoparticles (SLN) was investigated. DAG-based SLN showed phase separation at high NaCl concentration and acidic pH although the SLN-stabilized W/O emulsion was minimally affected. Span 80 increased the hydrophobicity whereas Span 60 increased the hydrophilicity of SLN. With concentration close to CMC, both Span surfactants caused detachment of SLN from interface and reduced emulsion stability. Nonetheless, addition of a small amount (0.1 wt%) of Span surfactants increased the interfacial modulus. The co-adsorption of SLN and PGPR at the oil-water interface promoted the formation of denser network structure and higher interfacial elasticity, which enhanced the emulsion rigidity and freeze-thaw stability. Sodium caseinate (NaCAS) showed intense competition with particles for adsorption at the interface and caused emulsion destabilization. Consequently, the NaCl release rate was directly influenced by the emulsion stability and the interaction between surfactants with SLN. The results have important implications for applying DAG nanoparticles as stabilizers in W/O emulsions with tailoring interfacial rigidity and water-soluble component release behaviors.
AB - The influence of surfactants (Span 80, Span 60, PGPR and sodium caseinate) on the stability of W/O emulsions stabilized by diacylglycerol (DAG)-based solid Lipid nanoparticles (SLN) was investigated. DAG-based SLN showed phase separation at high NaCl concentration and acidic pH although the SLN-stabilized W/O emulsion was minimally affected. Span 80 increased the hydrophobicity whereas Span 60 increased the hydrophilicity of SLN. With concentration close to CMC, both Span surfactants caused detachment of SLN from interface and reduced emulsion stability. Nonetheless, addition of a small amount (0.1 wt%) of Span surfactants increased the interfacial modulus. The co-adsorption of SLN and PGPR at the oil-water interface promoted the formation of denser network structure and higher interfacial elasticity, which enhanced the emulsion rigidity and freeze-thaw stability. Sodium caseinate (NaCAS) showed intense competition with particles for adsorption at the interface and caused emulsion destabilization. Consequently, the NaCl release rate was directly influenced by the emulsion stability and the interaction between surfactants with SLN. The results have important implications for applying DAG nanoparticles as stabilizers in W/O emulsions with tailoring interfacial rigidity and water-soluble component release behaviors.
KW - Interfacial properties
KW - NaCl release
KW - SLN
KW - Surfactants
KW - W/O emulsion stability
UR - http://www.scopus.com/inward/record.url?scp=85166627277&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2023.132070
DO - 10.1016/j.colsurfa.2023.132070
M3 - Article
AN - SCOPUS:85166627277
SN - 0927-7757
VL - 675
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 132070
ER -