Effect Of Electrostatic Repulsion On Liquid Crystal Behavior Of Marine Biomass Polysaccharides

Liquid crystal is the fourth state among solids, liquids and gases, with the characteristics of continuity and highly order. It can be used to prepare high strength and modulus fibers and multi-functional composite films, because of having highly ordered features. The factors affecting the liquid crystal state to be formed mainly include three points: 1) molecular chains with an aspect ratio much greater than 1; 2) moleculars with an certain rigid; 3) liquid crystal solution containing a certain charge strength. The paper mainly researches the effect of electrostic repulsion on the liquid crystal properties of alginate and chitosan as well as two-dimensional graphene oxide. And further analysis on the biological universality of electrostic repulsion promoting liquid crystal formation.The paper researches the effect of electrostic repulsion on marine biomass polysaccharide liquid crystal solution from different molecular structure parameters and solution composition. Characterized by polarized light microscopy and find that low molecular weight sodium alginate and chitosan oligosaccharide was added to induce polysaccharide solution to produce a liquid crystal phase, and at a certain ratio, liquid crystal form is maximized. Using rotational rheometer, it is found similar results obtained so that it can get conclusion that electrostatic repulsion will promote biological polysaccharide liquid crystal state to be formed and enhanced. The study also found that gum arabic added to polysaccharide also have formed alginate solution with good results.It researches the influence of two-dimensional material graphene oxide on sodium alginate liquid crystallinity. Prepared by Hummers get GO solution of different sizes, and GO performance is analyzed by POM, IR, SEM and TGA and so on. By formulating different solutions consisting of graphene oxide / sodium alginate complex solution, the effects of different molecular structure parameters on the liquid crystal properties of the solution and the solution composition. Characterization using a rotational rheometer and a polarizing microscope draw an conclusion that graphene oxide addition can promote liquid crystalline properties of alginate.In summary, the electrostatic repulsion will promote the formation of the liquid crystal state for biological macromoleculars, and the finding will develop a very good supplement for liquid crystal theory.