CO₂-responsive diethylaminoethyl-modified lignin nanoparticles and their application as surfactants for CO₂/N₂-switchable Pickering emulsions

Abstract

CO2/N2-triggered water-dispersible/collectable lignin-g-DEAEMA nanoparticles were successfully synthesized and were used to prepare emulsified/demulsified switchable Pickering emulsions by gas processing under nearly neutral conditions.

CO2-responsive polymeric materials: synthesis, self-assembly, and functional applications

“…108 The synthesized surfactant, lignin-g-DEAEMA, is dispersible in water upon bubbling CO 2 and coagulates upon removal of CO 2 by N 2 bubbling. Lignin, as the only biomass that contains aromatic structures, has been used in the synthesis of a CO 2 -switchable surfactant.…”

Lignosulfonic Acid: A Renewable and Effective Biomass-Based Catalyst for Multicomponent Reactions

“…As a waste product from paper industry, LS is also an amphiphilic biopolymer, which has been widely used as a surfactant, effective adsorbent to remove heavy metal from industrial wastewater, and supporting material for noble metal for catalysis, etc. [24][25][26] The sulfonic group of LS is usually introduced into the a-position of the phenylpropane structure of lignin by cleavage of the side chain, and can be obtained from LS by a simple proton-exchanged process (Fig. 1).…”

Use of Lignins from Sugarcane Bagasse for Assembling Microparticles Loaded withAzadirachta indicaExtracts for Use as Neem-Based Organic Insecticides

“…29 FTIR analyses are useful in confirming the success of acetylation and oxidation reactions in promoting structural modifications. 26,30 The FTIR spectra (Figure 2) showed the different profiles among alkaline, acetylated and oxidized lignin samples. As expected, the intensity of the O-H stretching around 3400 cm -1 was increased in oxidized lignin as a result of the formation of new oxygenated functional groups; it was lowered in the acetylated samples as a result of esterification.…”

“…However, it is also possible to chemically modify the polar hydroxyl groups to tune the hydrophobicity, depending on the application. 25,26 The phenolic acid moieties present in lignin structures are known for their antioxidant properties and may also provide photo and thermal stability, properties that are of great interest regarding to prolonged and controlled release. 27,28 Using the alkaline method described, the total yield of precipitated lignin (Lig-Alk) was 7.2% (m/m) according to sugarcane bagasse weight.…”