Scope of application
(1) cement, concrete water reducing agent: lignosulfonate used as water reducing agent is one of the most widely used. In 1935, the American E.W. SeriPture successfully developed a water-reducing agent with lignosulfonate as the main component. Since then, human beings have begun to study lignosulfonate water-reducing agent. Lignosulfonate used as cement, concrete water reducing agent can not only greatly improve its fluidity and plasticity, but also can greatly reduce the harmful pores, significantly enhance the compressive strength.
(2) Dispersants, flocculants and corrosion and scale inhibitors: Lignosulfonate is an anionic surfactant with excellent performance, which can be used as dispersants, flocculants, etc.
(3) Oilfield chemicals: Lignosulfonate has a special molecular structure and is widely used in oilfield chemicals. It is often used as a surfactant for tertiary oil recovery, a drilling fluid treatment agent and a water plugging agent.
(4) Synthetic resins: Since the 1990 s, lignin has often been used as a basic renewable material for synthetic polymers, resins and adhesives.
(5) Polymer materials: Lignin and its derivatives can be blended with polyvinyl chloride (PVC), polyethylene (PE), polyvinyl alcohol (PVA) and other olefin polymer materials to improve the stability, strength and resistance to photolysis. Liu Chunfang and others added lignosulfonate to rubber as a rubber reinforcing agent, which can improve the mechanical properties of rubber. Li Haijiang et al. compounded hydrolyzed lignin with natural rubber to form an interpenetrating network structure, and then obtained a lignin-natural rubber compound by co-precipitation.
(6) Agricultural additives: sodium lignosulfonate can not only be used as a pesticide dispersant, but also as a wetting agent, complexing agent and fertilizer, widely used in all aspects of agriculture.
