Compared
with surfactants synthesized from petrochemicals, those synthesized
from vegetable oil have outstanding environmental friendliness and
superior surface activity. Dissymmetric gemini surfactants, a new
class of gemini surfactant, have superior properties. Dissymmetry
gemini sulfosuccinate surfactant (DGSS) was synthesized from vegetable
oil. The structure of the product was confirmed by Fourier transform
infrared (FT-IR) and nuclear magnetic resonance (NMR) analyses. The
properties tests of DGSS showed that the DGSS can significantly reduce
the surface tension and has good emulsification ability, good wetting
ability, and poor foaming performance. DGSS was applied as a fatliquoring
agent in leather for lubricating collagen fibers and improving physical
and mechanical properties of leather. Compared with leather treated
with 14 wt % commercial fatliquoring agent, leather treated with 8
wt % DGSS can reach the same fatliquor effect. The biochemical oxygen
demand (BOD5) per chemical oxygen demand (COD) of the bath
after fatliquoring was beyond 0.3. DGSS has a good fatliquoring effect
and was easily biodegradable. DGSS has the advantage of price in the
market. DGSS has good features for application in the leather industry
as a fatliquoring agent.
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