Preparation of Degradable Wood Cellulose Films Using Ionic Liquids

Abstract

Biodegradable films prepared from cellulose have been developed in recent years. In this work, six kinds of wood cellulose films (WCFs) were successfully prepared using wood cellulose as raw materials and six ionic liquids (ILs) as solvents. The structure and properties of WCFs produced using six imidazole-based and 1,5-diazabicyclo[4.3.o]non-5-ene (DBN)-based ILs were investigated systematically. It indicated that the WCFs produced from 1-ethyl-3-methylimidazolium diethyl phosphate ([Emim]DEP) had a maximum transmittance of 90.1% and tensile strength of 124.5 MPa, which were much higher than the counterparts to 26.2% and 42.0 MPa of the WCFs produced using DBNbased ILs. Moreover, the structure and properties of WCFs and ILs had a little change after five recycles. Based on that, we used the screened [Emim]DEP as a solvent to prepare a highly efficient ultraviolet (UV)-to-red light conversion cellulose film (LCF) by doping rare-earth light-converting particles, CaAlSiN 3 :Eu 2+ (CASN). Results showed that the LCF emitted red light at 640 nm and had excellent light conversion ability, which was conducive to photosynthesis.

Fabrication of surface embedded silver cellulose-based flexible transparent electrodes by self-assembly

“…Another potential technique involves ionic liquids, which are solvents with low boiling points (Valderrama et al 2007) and high solubility (Rieland and Love 2020). Ionic liquids also can dissolve cellulose and regenerate the material in various forms (Xie et al 2022). Regenerated cellulose films prepared by ionic liquids generally have high optical transmittance and low surface roughness (Guo et al 2021), but there are only a few reports on flexible electrodes using regenerated cellulose.…”

Novel diacid–superbase ionic liquids for efficient dissolution of cellulose and simultaneous preparation of multifunctional cellulose materials

“…In addition, the currently prepared cellulose solution has a wide range of potential applications, which requires further research. 46,[52][53][54]58 In this work, eight superbase-derived ionic liquids (SILs) were prepared with superbases (DBN and DBU) and diacids (ethanedioic acid, malonic acid, succinic acid, and oxalic acid dihydrate), which could successfully dissolve microcrystalline cellulose and cotton wool. Analysing the solubility, it was clear that the molecular structures of the diacids and superbases were crucial for the solubility of cellulose.…”

“…In addition, the currently prepared cellulose solution has a wide range of potential applications, which requires further research. 46,52–54,58…”