Abstract: A water-soluble and biodegradable antimicrobial agent is provided, comprising a polymer composed of a segment A and a segment B, in which, the segment A has the following formula I: the segment B has the following formula II: wherein the segment A and the segment B in the polymer have a molar ratio of 1:0.007-1.2, and n is 0 or 1, m is an integer of 0-2, m+n?0, X is H, Na, K, NH4, ½Ca, or ½Mg, and Y is Cl, Br, or I.

Abstract: A method for preparing a polyglutamic acid (?-PGA) fiber having antibacterial and water absorption properties is provided. The method includes providing a ?-PGA fiber and immersing it in a sodium hypochlorite solution. A relation exists between an immersing time T of the ?-PGA fiber and a concentration X of the sodium hypochlorite solution as shown in the formula below: 10.2?(T?64.55X2+50X)?15.2, wherein X is 0.006-0.4 wt %.

Abstract: A method of preparing a water-soluble and biodegradable antimicrobial agent is provided. The method includes treating a polypeptide compound with sodium hypochlorite for at least 1 min, such that the polypeptide compound has at least one N-halamine group and has good antimicrobial effect. By using the method of the present invention, a chemical synthesis process is not required and an organic solvent is not required either, and thus, an antimicrobial agent having high water solubility, biodegradability, non-toxicity, good sterilization effect, and regeneration can be prepared with reduced harms to the environment.

Abstract: A method of preparing a water-soluble and biodegradable antimicrobial agent is provided. The method includes treating a polypeptide compound with sodium hypochlorite for at least 1 min, such that the polypeptide compound has at least one N-halamine group and has good antimicrobial effect. By using the method of the present invention, a chemical synthesis process is not required and an organic solvent is not required either, and thus, an antimicrobial agent having high water solubility, biodegradability, non-toxicity, good sterilization effect, and regeneration can be prepared with reduced harms to the environment.

Abstract: A method for preparing a polyglutamic acid (?-PGA) fiber having antibacterial and water absorption properties is provided. The method includes providing a ?-PGA fiber and immersing it in a sodium hypochlorite solution. A relation exists between an immersing time T of the ?-PGA fiber and a concentration X of the sodium hypochlorite solution as shown in the formula below: 10.2?(T?64.55X2+50X)?15.2, wherein X is 0.006-0.4 wt %.

Abstract: A water-soluble and biodegradable antimicrobial agent is provided, comprising a polymer composed of a segment A and a segment B, in which, the segment A has the following formula I: the segment B has the following formula II: wherein the segment A and the segment B in the polymer have a molar ratio of 1:0.007-1.2, and n is 0 or 1, m is an integer of 0-2, m+n?0, X is H, Na, K, NH4, ½Ca, or ½Mg, and Y is Cl, Br, or I.

Abstract: A platelet adhesion-resistant material is provided, which includes polytriuret-urethane consisting essentially of repeating structural units of formulae (I) to (III) in a random order, in which when the total number of the three repeating structural units in the polytriuret-urethane is 100, the number of the repeating structural units (I) is about 5 to about 50: in which each R independently represents a C2-C16 alkylene group, a C6-C30 aromatic group, a C6-C30 alicyclic group; n is an integer of 2 to 16; and R1 represents —(OCmH2m)p, in which m is an integer of 2 to 5, and p is an integer of 3 to 150.