A facile approach for preparing nanofibrillated cellulose from bleached corn stalk with tailored surface functions

Abstract

This study proposed a facile, e cient, and energy-saving one-pot strategy to produce nanofabricated cellulose (NFC) from bleached corn stalk along with concurrent modi cations of the surface. High-speed mechanical shearing and mechanochemical activation (urea/NaOH, oxalic acid, citric acid, and mercaptopropyl trimethoxysilane) were involved in the strategy. The effects of different surface functionalization on the morphological, crystalline, chemical, and thermal properties of the NFC were investigated. The results suggested that the bleached corn stalk bers were separated into micro brils associated with abundant branched and networked cellulose nano brils through intensive mechanical shearing. NFC showed an average diameter of 23 nm and an average length of 1530 nm, with an aspect ratio of 67. The hydroxyl groups on the NFC surface were functionalized and modi ed by forming amide (urea/NaOH), carboxyl (oxalic acid/citric acid), and hydrogen bond (mercaptopropyl trimethoxysilane), respectively. This novel one-pot strategy could open up new application areas for production and surface functionalization of nanocellulose.

A strategy to prepare high‐robust and ultra‐tough polylactic acid/polycaprolactone/talc composites with thermo‐resistance

“…This is explained by the fact that a drop in crystallinity often meant that the arrangement of polymer molecules was less organized and that there was less force holding molecules together 36 . The composites may become more susceptible to thermal disintegration or lose their thermal stability at high temperatures as a result 37 . The maximum thermal degradation temperature showed reduce in the PLA composites with an increase in talc loading.…”

“…36 The composites may become more susceptible to thermal disintegration or lose their thermal stability at high temperatures as a result. 37 The maximum thermal degradation temperature showed reduce in the PLA composites with an increase in talc loading. This is all related to the reduction of crystallinity after the addition of talc.…”

Development of eco-friendly biofilms by utilizing microcrystalline cellulose extract from banana pseudo-stem

“…It is made up of β-D-glucose and β-D glucopyranose 2-O-(carboxymethyl)-monosodium salt that are connected by β-1,4-glycosidic bonds. It is commonly used as a viscosity modifier or thickener , and to stabilize emulsions in various products, both food and non-food but not limited to the use in preparing nanostructured bio composites, hydrogels, paper and films [ 11 ]. Recent advancements have come to the light on plasticized poly bio composites embedded with nano fibrillated cellulose to emerge as an alternative to existing polyethene based packaging materials but are limited to use due to the unpredictable ductility and impact toughness [ 12 ].…”