Chitosan is by nature widespread presence of chitin (chitin) after deacetylation, the chemical name the polydextrose amine (1-4) -2 - amino-BD glucose, since 1859, the Frenchman Rouget first to get chitosan, bio-functional nature of this natural polymer, excellent performance and compatibility, blood compatibility, security, microbial degradability was all walks of life widespread concern in the pharmaceutical, food, chemical, cosmetics, water treatment and metal recovery and recycling, biochemical and biomedical engineering in many fields of applied research has made significant progress. For patients, chitosan, lowering blood pressure, blood sugar lowering effect has been reported.
Chitosan is a product of chitin N-deacetylation, In general, an N-acetyl take off more than 55 percent can be called chitosan, or, in 1% acetic acid or 1% hydrochloric acid dissolving 1% of the deacetylation of chitin, the deacetylation of chitin is called chitosan. "Alias chitosan, the deacetylation of chitin deacetylation of chitin, soluble chitin, soluble chitin, Chitosan and chitosan", "crustaceans sugar, The glycosaminoglycan crustaceans polysaccharides, chitosan polysaccharide "chemical called beta-(1 → 4) -2 - amino - 2 - deoxy-D-glucose, the structure shown in Figure. The degree of deacetylation (DD), determines the macromolecular chains of amino (NH2) content, and DD increase in amine protonated leaving charged groups of chitosan in dilute acid solution increased, the polyelectrolyte charge density increase, Xanthan Gum the result will inevitably lead to changes in its structure, properties and performance, since the nature of the chitosan in dilute solution studies have ignored the DD value equation. VANDUM, who studied the influence of ionic strength on the molecular size and viscosity of chitosan in dilute aqueous solution. Concluded that the ionic strength will change the degree of swelling of the random coil, thus changing the molecular size and intrinsic viscosity, the MARK the-HOUWINK equation constants of different DD chitosan results show that the K A value with changes in DD values . By MARK-HOUWINK equation constants K, A regular depends on the chitosan deacetylation degree, but at the same molecular weight, with the increase of degree of deacetylation of chitosan in dilute solutions of molecular size, intrinsic viscosity degree, and the expansion factor increases, the characteristic ratio and food additives steric factors decrease with the increase of the degree of deacetylation. Thus within the scope of any one chitosan samples through relatively simple intrinsic viscosity measurements, to calculate the average molecular weight, which could accumulate the basic data for further research.
Chitosan is a product of chitin N-deacetylation, In general, an N-acetyl take off more than 55 percent can be called chitosan, or, in 1% acetic acid or 1% hydrochloric acid dissolving 1% of the deacetylation of chitin, the deacetylation of chitin is called chitosan. "Alias chitosan, the deacetylation of chitin deacetylation of chitin, soluble chitin, soluble chitin, Chitosan and chitosan", "crustaceans sugar, The glycosaminoglycan crustaceans polysaccharides, chitosan polysaccharide "chemical called beta-(1 → 4) -2 - amino - 2 - deoxy-D-glucose, the structure shown in Figure. The degree of deacetylation (DD), determines the macromolecular chains of amino (NH2) content, and DD increase in amine protonated leaving charged groups of chitosan in dilute acid solution increased, the polyelectrolyte charge density increase, Xanthan Gum the result will inevitably lead to changes in its structure, properties and performance, since the nature of the chitosan in dilute solution studies have ignored the DD value equation. VANDUM, who studied the influence of ionic strength on the molecular size and viscosity of chitosan in dilute aqueous solution. Concluded that the ionic strength will change the degree of swelling of the random coil, thus changing the molecular size and intrinsic viscosity, the MARK the-HOUWINK equation constants of different DD chitosan results show that the K A value with changes in DD values . By MARK-HOUWINK equation constants K, A regular depends on the chitosan deacetylation degree, but at the same molecular weight, with the increase of degree of deacetylation of chitosan in dilute solutions of molecular size, intrinsic viscosity degree, and the expansion factor increases, the characteristic ratio and food additives steric factors decrease with the increase of the degree of deacetylation. Thus within the scope of any one chitosan samples through relatively simple intrinsic viscosity measurements, to calculate the average molecular weight, which could accumulate the basic data for further research.
