Novel amphiphilic cellulose nanocrystals for pH-responsive Pickering emulsions

被引：77

作者：

Li, Weixue ^{[1
]}

Ju, Benzhi ^{[1
]}

Zhang, Shufen ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2020年 / 229卷

基金：

中国国家自然科学基金;

关键词：

Cellulose nanocrystals; Polyethyleneimine; Benzaldehyde; pH-responsive; Pickering emulsion; Recycling; SILICA NANOPARTICLES; COMBINATION; PARTICLES;

D O I：

10.1016/j.carbpol.2019.115401

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Development of a green, recyclable emulsifier for pH-responsive Pickering emulsion would be of great importance to many industries. To this end, a novel emulsifier, benzyl-polyethyleneimine modified cellulose nanocrystals (Ben-PEI-CNCs), was developed via the periodate oxidation of cellulose nanocrystals and reductive amination. Ben-PEI-CNCs possess pH-responsive amphiphilicity due to the existence of hydrophilic amino and hydrophobic benzyl groups. The Pickering emulsions stabilized by Ben-PEI-CNC2 and Ben-PEI-CNC18 are very responsive to pH changes, and adjusting the pH from 3 to 7 effectively triggers oil-water separation and emulsification. Additionally, cyclic testing establishes the robustness of this process. Overall, this study demonstrates that Ben-PEI-CNCs can promote the transition from a stable emulsion to an unstable emulsion by adjusting the pH, allowing the recovery of oil and the recycling of the emulsifier.

引用

页数：10

共 34 条

[1] Emulsions stabilised solely by colloidal particles [J].

Aveyard, R ;

Binks, BP ;

Clint, JH .

ADVANCES IN COLLOID AND INTERFACE SCIENCE, 2003, 100 :503-546

[2] Oil-in-water Pickering emulsions via microfluidization with cellulose nanocrystals: 1. Formation and stability [J].

Bai, Long ;

Lv, Shanshan ;

Xiang, Wenchao ;

Huan, Siqi ;

McClements, David Julian ;

Rojas, Orlando J. .

FOOD HYDROCOLLOIDS, 2019, 96 :699-708

[3] OBSERVATIONS BY HIGH-RESOLUTION C-13 NUCLEAR MAGNETIC-RESONANCE OF CELLULOSE-I RELATED TO MORPHOLOGY AND CRYSTAL-STRUCTURE [J].

EARL, WL ;

VANDERHART, DL .

MACROMOLECULES, 1981, 14 (03) :570-574

[4] pH-responsible Pickering emulsion and its catalytic application for reaction at water-oil interface [J].

Fang, Zhihui ;

Yang, Duanguang ;

Gao, Yong ;

Li, Huaming .

COLLOID AND POLYMER SCIENCE, 2015, 293 (05) :1505-1513

[5] Syntheses of shell cross-linked micelles using acidic ABC triblock copolymers and their application as pH-responsive particulate emulsifiers [J].

Fujii, S ;

Cai, YL ;

Weaver, JVM ;

Armes, SP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (20) :7304-7305

[6] Cellulose Nanocrystals: Chemistry, Self-Assembly, and Applications [J].

Habibi, Youssef ;

Lucia, Lucian A. ;

Rojas, Orlando J. .

CHEMICAL REVIEWS, 2010, 110 (06) :3479-3500

[7] A pH-switched Pickering emulsion catalytic system: high reaction efficiency and facile catalyst recycling [J].

Huang, Jianping ;

Yang, Hengquan .

CHEMICAL COMMUNICATIONS, 2015, 51 (34) :7333-7336

[8] Acid-Catalyzed and Solvolytic Desulfation of H2SO4-Hydrolyzed Cellulose Nanocrystals [J].

Jiang, Feng ;

Esker, Alan R. ;

Roman, Maren .

LANGMUIR, 2010, 26 (23) :17919-17925

[9] Smart pH-Responsive Polymer-Tethered and Pd NP-Loaded NMOF as the Pickering Interfacial Catalyst for One-Pot Cascade Biphasic Reaction [J].

Jiang, Wei-Ling ;

Fu, Qi-Juan ;

Yao, Bing Jian ;

Ding, Luo-Gang ;

Liu, Cong-Xue ;

Dong, Yu-Bin .

ACS APPLIED MATERIALS & INTERFACES, 2017, 9 (41) :36438-36446

[10] Cellulosic nanorods of various aspect ratios for oil in water Pickering emulsions [J].

Kalashnikova, Irina ;

Bizot, Herve ;

Bertoncini, Patricia ;

Cathala, Bernard ;

Capron, Isabelle .

SOFT MATTER, 2013, 9 (03) :952-959

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