Interaction and formation mechanism of binary complex between zein and propylene glycol alginate

被引：118
作者：
Sun, Cuixia [1 ]
Dai, Lei [1 ]
Gao, Yanxiang [1 ]
机构：
[1] China Agr Univ, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing Key Lab Funct Food Plant Resources, Beijing Lab Food Qual & Safety,Coll Food Sci & Nu, Beijing 100083, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2017年 / 157卷
基金：
中国国家自然科学基金;
关键词：
Zein; Propylene glycol alginate; Interaction; Binary complex; Mechanism; BETA-LACTOGLOBULIN; BIOPOLYMER PARTICLES; MORPHOLOGICAL-CHARACTERISTICS; SECONDARY STRUCTURE; THERMAL-STABILITY; HEAT-TREATMENT; WHEY-PROTEIN; PART; CHITOSAN; ENCAPSULATION;
D O I：
10.1016/j.carbpol.2016.11.046
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The anti-solvent co-precipitation method was used to fabricate the zein-propylene glycol alginate (PGA) binary complex with different mass ratios of zein to PGA (20:1, 10:1, 5:1, 2:1 and 1:1) at pH 4.0. Results showed that attractive electrostatic interaction between zein and PGA occurred and negatively charged binary complex with large size and high turbidity was formed due to the charge neutralization. Hydrogen bonding and hydrophobic effects were involved in the interactions between zein and PGA, leading to the changed secondary structure and improved thermal stability of zein. Aggregates in the irregular shape with large size were obviously observed in the AFM images. PGA alone exhibited a fine filamentous network structure, while zein-PGA binary complex showed a rough branch-like pattern and the surface of "branch" was closely adsorbed by lots of spherical zein particles. Qin zein-PGA binary complex dispersions presented the improved photochemical and thermal stability. The potential mechanism of a two-step process was proposed to explain the formation of zein-PGA binary complexes. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1638 / 1649
页数：12
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