Six different sodium lignosulfonates with varying degrees of sulfonation (0.14–1.29 sulfonate groups per phenylpropane unit) and molecular weights (M_w = 6000–330,000 g/mol) were evaluated for their ability to disperse carbon black in aqueous media. Rheological and particle size measurements of carbon black dispersions indicated that lignosulfonates with low degree of sulfonation function as good carbon black dispersants. The dispersion efficiency did not correspond directly to the amount of lignosulfonate adsorbed on the surface of carbon black. The lignosulfonates have an ability to enhance the colloidal stability by electrostatic repulsion, and the likely mechanism of stabilization is a combination of electrostatic repulsion and steric hindrance.

Graphical abstract

中文翻译：

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木质素磺酸钠稳定的水性炭黑分散体

有不同程度的磺化的（每单位苯基丙烷磺酸0.14-1.29基团）和分子量（六个不同的木素磺酸钠中号_瓦特= 6000-330,000克/摩尔）为它们在水性介质中的能力，以分散炭黑进行了评价。炭黑分散体的流变学和粒度测量表明，磺化度低的木质素磺酸盐起着良好的炭黑分散剂的作用。分散效率不直接对应于吸附在炭黑表面上的木质素磺酸盐的量。木质素磺酸盐具有通过静电排斥增强胶体稳定性的能力，并且稳定的可能机理是静电排斥和空间位阻的组合。

图形概要