1 research outputs found
Formation of Uniform Colloidal Spheres Based on Lignosulfonate, a Renewable Biomass Resource Recovered from Pulping Spent Liquor
Effects of mass ratios on the sodium
lignosulfoante (NaLS) and
cetyltrimethylammonium bromide (CTAB) mixing system were first investigated
by zeta potential and surface tension measurements. Uniform colloidal
spheres from the NaLS/CTAB complex were then fabricated via electrostatic
and hydrophobic self-assembly and characterized by DLS, TEM, contact
angle, elemental analysis, XPS, and FTIR measurements. Results showed
the stoichiometric mass ratio (SMR) of the NaLS/CTAB system was 1:2.82,
where the hydrophobicity was strongest and preparing colloidal spheres
was feasible. Colloidal spheres were formed through gradual aggregation
of NaLS/CTAB molecules at SMR, which was induced by continuously adding
water into NaLS/CTAB/EtOH solutions. NaLS/CTAB molecules started to
form spheres at a critical water content of 58 vol %, and the formation
process was completed at a water content of 84 vol % when the initial
concentration of NaLS/CTAB in EtOH was 1.0 mg mL<sup>–1</sup>. The sizes of NaLS/CTAB colloidal spheres could be well controlled
by adjusting water-adding rates. This preparation of lignosulfonate-based
nanoparticles is very simple, safe, and low-cost, and these obtained
nanoparticles have advantages of biodegradability and ultraviolet
resistance. This study provides a green and valuable approach to value-added
applications of lignosulfonate biomass recovered from pulping spent
liquor and is of great significance for both economic and environmental
benefits