How does sodium alginate gel?

Sodium alginate is derived frombrown algagenerickelporsea grapeMiddle extractioniodineandmannitolSubsequentby-productIts molecule consists of β -D- mannuronic acid (β -D-mannuronic, m) and α -L- guluronic acid (α -l -L-guluronic, g) press (1→ 4) key connection. The aqueous solution of sodium alginate has high viscosity and has been used as food.Thickener、stabilizing agent、emulgatorWait. Sodium alginate is a non-toxic food, which was included in the United States Pharmacopoeia as early as 1938. Sodium alginate contains a lot of — COO－-,which can show polyanionic behavior in aqueous solution and has certain adhesion, can be used as a drug carrier for treating mucosal tissue. Under acidic conditions, — COO－-into — COOH，ionization degreeWhen decreasing, the hydrophilicity of sodium alginate decreases, the molecular chain shrinks and the pH value increases, — COOH group dissociates constantly, and the hydrophilicity of sodium alginate increases and the molecular chain stretches. Therefore, sodium alginate has obvious pH sensitivity. Sodium alginate can quickly form gel under extremely mild conditions, when Ca2+, Sr2+ and so on are present.cationWhen it exists, Na+ on G units reacts with divalent cations, and G units pile up to form cross-linked network structure, thus forming hydrogel. Sodium alginate formationgelMild conditions, which can avoid sensitive drugs, protein,cellandenzymeInactivation of such active substances. Because of these excellent characteristics, sodium alginate has been widely used in food industry and medicine.
sodium alginateAs an additive, calcium sodium alginate gel is widely used in people's daily life. So what is calcium sodium alginate gel? Today, let Hongjie seaweed Xiaobian explain to everyone:

　　The calcium alginate gel made by the principle of "bean curd with brine" is an irreversible gel with heat, which can be mixed cold, fried and rinsed, and can supplement calcium. It is a rare healthy food. Calcium alginate gel food has controllable calories, nutrition, taste and shape, and can develop thousands of healthy foods. Molecular cuisine with calcium alginate gel as the main raw material has been popular in many big cities around the world, and molecular cuisine restaurants have become a fashionable and healthy new choice for cities. [Note: Artificial jellyfish skin made of sodium alginate and calcium can also be regarded as calcium alginate gel food, but because it contains alum (containing aluminum ions), excessive intake of aluminum ions may lead to an increase in the incidence of Alzheimer's disease]