Sustainable and Versatile Superhydrophobic Cellulose Nanocrystals

被引：81

作者：

Xiang, Haosheng ^{[1
,2
,3
]}

Wang, Bochu ^{[4
]}

Zhong, Mengqiu ^{[1
,2
,3
]}

Liu, Wenguang ^{[1
,2
,3
]}

Yu, Dehai ^{[7
]}

Wang, Yilong ^{[5
]}

Tam, Kam C. ^{[8
]}

Zhou, Guofu ^{[1
,2
,3
,6
]}

Zhang, Zhen ^{[1
,2
,3
]}

机构：

[1] South China Normal Univ, SCNU TUE Joint Lab Device Integrated Respons Mat, Natl Ctr Int Res Green Optoelect, Guangzhou 510006, Peoples R China

[2] South China Normal Univ, Guangdong Prov Key Lab Optic Informat Mat & Techn, Guangzhou 510006, Peoples R China

[3] South China Normal Univ, South China Acad Adv Optoelect, Inst Elect Paper Displays, Guangzhou 510006, Peoples R China

[4] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

[5] Sci Ltd, Huzhou 313000, Peoples R China

[6] Shenzhen Guohua Optoelect Tech Co Ltd, Shenzhen 518110, Guangdong, Peoples R China

[7] Qilu Univ Technol, Key Lab Pulp & Paper Sci Technol, Shandong Acad Sci, Minist Educ, Jinan 250353, Peoples R China

[8] Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2022年 / 10卷 / 18期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

cellulose nanocrystal; superhydrophobic; tannic acid; paper-based packaging; sustainable; NANOFIBROUS MEMBRANES; ROBUST; WATERPROOF; POLYMERS; EFFICIENT; SURFACES; PAPER; ATRP;

D O I：

10.1021/acssuschemeng.2c00311

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Paper-based materials have been widely used in packaging replacing nonbiodegradable fossil-based polymers due to the increasing concerns on environmental pollution. However, paper is hygroscopic and its mechanical strength is dramatically reduced in the presence of moisture. The current hydrophobic modification of paper via nonbiodegradable polymer coating hinders the recycling of paper. A sustainable approach was proposed to prepare superhydrophobic cellulose nanocrystals (CNCs) by anchoring octadecylamine (ODA) on the surface of CNCs via the self-polymerization of tannic acid and Michael addition/Schiff base reaction between polytannic acid-coated CNCs (PTA@CNCs) and ODA. The obtained ODA-PTA@CNCs could be well dispersed in ethanol and sprayed onto different substrates to form superhydrophobic coatings, such as paper, cotton, and polyurethane. The outstanding superhydrophobicity of ODA-PTA@CNCs is attributed to the low surface energy of ODA and multiscale roughness of CNC nanorods. The promising applications of ODA-PTA@CNCs in waterproof paper-based packaging, antifouling and breathable textile, semipermeable membrane, oil-water separation, Janus paper, and actuators were demonstrated. Furthermore, the durability of superhydrophobic ODA-PTA@CNCs was confirmed by abrasion and washing tests. Overall, ODA-PTA@CNCs are promising sustainable and versatile hydrophobic coatings due to their facile preparation, biodegradability, convenience, and durability.

引用

页码：5939 / 5948

页数：10

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