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Lignocellulose nanocrystals from pineapple peel: Preparation, characterization and application as efficient Pickering
Yuan Chen1, Huan Zhang1, Xin Feng1
1College of Food Science, Southwest University, Chongqing 400715, China.
Food Research International (Ottawa, Ont.)
|December 6, 2021
Summary
Pineapple peel waste was processed into lignocellulose nanocrystals (LCNC) by controlling delignification. This method tunes LCNC properties like size and crystallinity, enabling high-value utilization of agricultural waste.
Area of Science:
- Materials Science
- Biotechnology
- Sustainable Chemistry
Background:
- Agricultural waste, such as pineapple peel, presents a significant disposal challenge.
- Lignocellulose nanocrystals (LCNC) offer potential for high-value applications.
- Controlling the properties of LCNC is crucial for their effective utilization.
Purpose of the Study:
- To investigate the isolation of LCNC from pineapple peel.
- To explore the impact of varying delignification degrees on LCNC properties.
- To assess the potential for high-value utilization of pineapple peel waste.
Main Methods:
- Pineapple peel was subjected to sulfuric acid hydrolysis for LCNC isolation.
- Different degrees of delignification were applied to the pineapple peel.
- Characterization of LCNC using Atomic Force Microscopy (AFM), Confocal Laser Scanning Microscopy (CLSM), UV/Vis spectroscopy, and X-ray Photoelectron Spectroscopy (XPS).
Main Results:
- Lignin presence in LCNC was confirmed, with a rod-like structure observed.
- Delignification control adjusted LCNC length (310–460 nm), diameter (19–38 nm), crystallinity (61%–71%), and hydrophobicity (contact angle 84°–60°).
- The properties of LCNC influenced the performance of stabilized Pickering emulsions.
Conclusions:
- The degree of delignification is a key factor in controlling LCNC properties.
- Tailored LCNC from pineapple peel show promise for advanced material applications.
- This research highlights a sustainable pathway for valorizing lignocellulosic agricultural waste.
