Lipase induced highly hydrophobic nanofibrillated cellulose film for strain sensor application

Yingchao Wang; Qiang Wang; Shanshan Liu; Xingxiang Ji; Guihua Yang; Jiachuan Chen

doi:10.1016/j.carbpol.2022.119193

Lipase induced highly hydrophobic nanofibrillated cellulose film for strain sensor application

Carbohydr Polym. 2022 May 15:284:119193. doi: 10.1016/j.carbpol.2022.119193. Epub 2022 Jan 31.

Authors

Yingchao Wang¹, Qiang Wang², Shanshan Liu³, Xingxiang Ji¹, Guihua Yang¹, Jiachuan Chen¹

Affiliations

¹ State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China.
² State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: wangqiang8303@163.com.
³ State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: liushanshan@qlu.edu.cn.

PMID: 35287910
DOI: 10.1016/j.carbpol.2022.119193

Abstract

An environmental-friendly lipase induced highly hydrophobic NFC film was fabricated through lipase induced dimethyl adipate (DA) esterification followed by silver nanowires (AgNWs) coating for strain sensor application. Due to the lipase activation, the substitution degree (DS_NMR) of 0.18 was achieved, which was three times higher than that of the control sample (without lipase treatment of NFC-DA). As a result, the water contact angle (WCA) of lipase induced adipated-NFC film was reached to 105 ± 3° from 50 ± 2.3° of NFC-DA. In addition, the cellulose structure and performance were well maintained after lipase induced esterification, confirmed by AFM, SEM, TG/DTG, and XRD analysis. After AgNWs coating and annealing, the hydrophobic NFC film-based strain sensor exhibited excellent sensitivity towards human motion, such as finger/wrist movement in real-time, even under wet conditions. Overall, a highly hydrophobic NFC film-based strain sensor was fabricated, which has promising application in wearable devices for human motion monitoring.

Keywords: Hydrophobic; Lipase; Nanofibrillated cellulose (NFC) film; Silver nanowires (AgNWs); Strain sensor.

MeSH terms

Cellulose* / chemistry
Humans
Lipase
Nanowires*
Silver / chemistry
Water / chemistry

Substances

Water
Silver
Cellulose
Lipase