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Ionic Liquids Grafted Cellulose Nanocrystals for High-Strength and Toughness PVA Nanocomposite.
ACS Appl Mater Interfaces. 2020 Aug 26; 12(34):38796-38804.AA

Abstract

The surface functionalization of cellulose nanocrystals (CNCs) is of significant importance for promoting its diverse applications. However, the efficient strategy reported so far for cation functionalization of CNCs remains limited owing to the electrostatic attraction between cationic modifiers and electronegative CNCs. Herein, a cationized CNC (CNC-LA-IL) has been successfully prepared in aqueous media by grafting the [VBIm][BF4], a kind of ionic liquid (IL), on the surface of a sulfated CNC using lactic acid (LA) as a linker molecule. This surface functionalization not only converts the negative charge of CNC suspensions to a positive charge (zeta potential reversed from -35 to +40 mV) but also leads to enhanced thermal stability and redispersibility of the dried CNC. To examine the reinforcing effect of IL-modified CNCs, poly(vinyl alcohol) (PVA)/CNC-LA-IL nanocomposite films were further prepared by the solution casting method. To one's surprise, the as-prepared PVA/CNC-LA-IL films exhibit extraordinary improvement in both the tensile strength (92%) and the toughness (166%) with only a 0.3 wt % CNC loading. This study provides a green and facile method to achieve ionic liquids grafted CNCs for high-performance nanocomposites.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Analysis and Testing Center, Soochow University, Renai Road 199, Suzhou 215123, China.

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32805936

Citation

Wang, Li, et al. "Ionic Liquids Grafted Cellulose Nanocrystals for High-Strength and Toughness PVA Nanocomposite." ACS Applied Materials & Interfaces, vol. 12, no. 34, 2020, pp. 38796-38804.

Wang L, Hu J, Liu Y, et al. Ionic Liquids Grafted Cellulose Nanocrystals for High-Strength and Toughness PVA Nanocomposite. ACS Appl Mater Interfaces. 2020;12(34):38796-38804.

Wang, L., Hu, J., Liu, Y., Shu, J., Wu, H., Wang, Z., Pan, X., Zhang, N., Zhou, L., & Zhang, J. (2020). Ionic Liquids Grafted Cellulose Nanocrystals for High-Strength and Toughness PVA Nanocomposite. ACS Applied Materials & Interfaces, 12(34), 38796-38804. https://doi.org/10.1021/acsami.0c11217

Wang L, et al. Ionic Liquids Grafted Cellulose Nanocrystals for High-Strength and Toughness PVA Nanocomposite. ACS Appl Mater Interfaces. 2020 Aug 26;12(34):38796-38804. PubMed PMID: 32805936.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Ionic Liquids Grafted Cellulose Nanocrystals for High-Strength and Toughness PVA Nanocomposite. AU - Wang,Li, AU - Hu,Jie, AU - Liu,Yunxiao, AU - Shu,Jie, AU - Wu,Hao, AU - Wang,Zhaozhao, AU - Pan,Xiaolong, AU - Zhang,Ning, AU - Zhou,Lijuan, AU - Zhang,Jianming, Y1 - 2020/08/14/ PY - 2020/8/19/pubmed PY - 2020/8/19/medline PY - 2020/8/19/entrez KW - cellulose nanocrystals KW - ionic liquid KW - nanocomposite KW - poly(vinyl alcohol) KW - surface modification SP - 38796 EP - 38804 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 12 IS - 34 N2 - The surface functionalization of cellulose nanocrystals (CNCs) is of significant importance for promoting its diverse applications. However, the efficient strategy reported so far for cation functionalization of CNCs remains limited owing to the electrostatic attraction between cationic modifiers and electronegative CNCs. Herein, a cationized CNC (CNC-LA-IL) has been successfully prepared in aqueous media by grafting the [VBIm][BF4], a kind of ionic liquid (IL), on the surface of a sulfated CNC using lactic acid (LA) as a linker molecule. This surface functionalization not only converts the negative charge of CNC suspensions to a positive charge (zeta potential reversed from -35 to +40 mV) but also leads to enhanced thermal stability and redispersibility of the dried CNC. To examine the reinforcing effect of IL-modified CNCs, poly(vinyl alcohol) (PVA)/CNC-LA-IL nanocomposite films were further prepared by the solution casting method. To one's surprise, the as-prepared PVA/CNC-LA-IL films exhibit extraordinary improvement in both the tensile strength (92%) and the toughness (166%) with only a 0.3 wt % CNC loading. This study provides a green and facile method to achieve ionic liquids grafted CNCs for high-performance nanocomposites. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/32805936/Ionic_Liquids_Grafted_Cellulose_Nanocrystals_for_High_Strength_and_Toughness_PVA_Nanocomposite_ DB - PRIME DP - Unbound Medicine ER -