Preparation process for novel chitosan antibacterial fiber

Abstract

The invention relates to a preparation process for novel chitosan antibacterial fiber, which comprises the following steps: A. preparation of raw materials, B. preparation of a silane coupling agent kh560 grafted fiber, C. preparation of the novel chitosan antibacterial fiber. The preparation process adopts grafting technique, chitosan and cellulose fiber are effectively connected, the grafted chitosan fiber has acid and base resistance, and can ensure that the fiber has good antibacterial performance after treatment including dyeing, washing, drying, etc. The grafting rate of chitosan and cellulose is high, waste of raw materials is less, and production cost is low.

Description

technical field

[0001] The invention relates to the field of antibacterial fibers, in particular to a preparation process of a novel chitosan antibacterial fiber. Background technique

[0002] Chitin, also known as chitin, has a chemical structure similar to that of fiber and exists in large quantities in the shells of shrimp, crabs, insects and other animals. Chitosan is a product with a degree of deacetylation of chitin over 70%. The chitosan molecular chain structure has a large number of amino groups, which are positively charged and have good antibacterial properties. At present, the main preparation methods of chitin or chitosan antibacterial fibers are as follows: 1. Chitin / chitosan is directly spun, the method is to first dissolve chitin / chitosan in a solvent to prepare a spinning dope, and spin the spinning solution. , coagulation, stretching, washing, drying and other steps to make fibers; 2. Coating method, after dipping ordinary fibers in chitin / chitosan solu...

Examples

Embodiment 1

[0025] A preparation process of a novel chitosan antibacterial fiber, comprising the following steps:

[0026] (1) Preparation of raw materials

[0027] A. In the reaction tank, add cellulose fibers to a sodium hydroxide solution with a concentration of 1-5% to remove surface impurities by soaking for 12-18 hours, wash with clean water to neutrality, dehydrate, and dry to obtain pretreated fibers fiber;

[0028] B. Configure a 4% silane coupling agent kh560 solution, add acetic acid, mix evenly, and adjust the pH to 3-5;

[0029] C. Chitosan solution with a concentration of 2-5%, add sodium hydroxide, mix evenly, and adjust the pH to 9-11; (2) Preparation of silane coupling agent kh560 grafted fibers

[0030] In the reaction tank, soak the cellulose fibers pretreated in step (1)A in the silane coupling agent kh560 solution in step (1)B at a liquor ratio of 1:20, stir evenly, and heat to 60-70°C , kept for 2-6h, washed with water, dehydrated, and dried to obtain silane coupl...

Embodiment 2

[0034] A preparation process of a novel chitosan antibacterial fiber, characterized in that it comprises the following steps:

[0035] (1) Preparation of raw materials

[0036] A. In the reaction tank, the cellulose fibers are added to a sodium hydroxide solution with a concentration of 1% to remove surface impurities by soaking for 12 hours, washed with clean water to neutrality, dehydrated, and dried to obtain pretreated cellulose fibers;

[0037] B. Configure a 4% silane coupling agent kh560 solution, add acetic acid, mix well, and adjust the pH to 3;

[0038] C. Chitosan solution with a concentration of 2%, add sodium hydroxide, mix evenly, and adjust the pH to 9; (2) Preparation of silane coupling agent kh560 grafted fibers

[0039] In the reaction tank, soak the cellulose fibers pretreated in step (1)A in the silane coupling agent kh560 solution in step (1)B at a liquor ratio of 1:20, stir evenly, heat to 60°C, and keep warm 2h, washed with water, dehydrated, and dried...

Embodiment 3

[0043] A preparation process of a novel chitosan antibacterial fiber, characterized in that it comprises the following steps:

[0044] (1) Preparation of raw materials

[0045] A. In the reaction tank, the cellulose fibers are added to a sodium hydroxide solution with a concentration of 5% to remove surface impurities by soaking for 18 hours, washed with clean water to neutrality, dehydrated, and dried to obtain pretreated cellulose fibers;

[0046] B. Configure a 4% silane coupling agent kh560 solution, add acetic acid, mix evenly, and adjust the pH to 5;

[0047]C. Chitosan solution with a concentration of 2-5%, add sodium hydroxide, mix evenly, and adjust the pH to 11; (2) Preparation of silane coupling agent kh560 grafted fibers

[0048] In the reaction tank, soak the cellulose fibers pretreated in step (1)A in the silane coupling agent kh560 solution in step (1)B at a liquor ratio of 1:20, stir evenly, heat to 70°C, and keep warm 6h, washed with clean water, dehydrated,...

technical field

[0001] The invention relates to the field of antibacterial fibers, in particular to a preparation process of a novel chitosan antibacterial fiber. Background technique

[0002] Chitin, also known as chitin, has a chemical structure similar to that of fiber and exists in large quantities in the shells of shrimp, crabs, insects and other animals. Chitosan is a product with a degree of deacetylation of chitin over 70%. The chitosan molecular chain structure has a large number of amino groups, which are positively charged and have good antibacterial properties. At present, the main preparation methods of chitin or chitosan antibacterial fibers are as follows: 1. Chitin / chitosan is directly spun, the method is to first dissolve chitin / chitosan in a solvent to prepare a spinning dope, and spin the spinning solution. , coagulation, stretching, washing, drying and other steps to make fibers; 2. Coating method, after dipping ordinary fibers in chitin / chitosan solu...

Examples

Embodiment 1

[0025] A preparation process of a novel chitosan antibacterial fiber, comprising the following steps:

[0026] (1) Preparation of raw materials

[0027] A. In the reaction tank, add cellulose fibers to a sodium hydroxide solution with a concentration of 1-5% to remove surface impurities by soaking for 12-18 hours, wash with clean water to neutrality, dehydrate, and dry to obtain pretreated fibers fiber;

[0028] B. Configure a 4% silane coupling agent kh560 solution, add acetic acid, mix evenly, and adjust the pH to 3-5;

[0029] C. Chitosan solution with a concentration of 2-5%, add sodium hydroxide, mix evenly, and adjust the pH to 9-11; (2) Preparation of silane coupling agent kh560 grafted fibers

[0030] In the reaction tank, soak the cellulose fibers pretreated in step (1)A in the silane coupling agent kh560 solution in step (1)B at a liquor ratio of 1:20, stir evenly, and heat to 60-70°C , kept for 2-6h, washed with water, dehydrated, and dried to obtain silane coupl...

Embodiment 2

[0034] A preparation process of a novel chitosan antibacterial fiber, characterized in that it comprises the following steps:

[0035] (1) Preparation of raw materials

[0036] A. In the reaction tank, the cellulose fibers are added to a sodium hydroxide solution with a concentration of 1% to remove surface impurities by soaking for 12 hours, washed with clean water to neutrality, dehydrated, and dried to obtain pretreated cellulose fibers;

[0037] B. Configure a 4% silane coupling agent kh560 solution, add acetic acid, mix well, and adjust the pH to 3;

[0038] C. Chitosan solution with a concentration of 2%, add sodium hydroxide, mix evenly, and adjust the pH to 9; (2) Preparation of silane coupling agent kh560 grafted fibers

[0039] In the reaction tank, soak the cellulose fibers pretreated in step (1)A in the silane coupling agent kh560 solution in step (1)B at a liquor ratio of 1:20, stir evenly, heat to 60°C, and keep warm 2h, washed with water, dehydrated, and dried...

Embodiment 3

[0043] A preparation process of a novel chitosan antibacterial fiber, characterized in that it comprises the following steps:

[0044] (1) Preparation of raw materials

[0045] A. In the reaction tank, the cellulose fibers are added to a sodium hydroxide solution with a concentration of 5% to remove surface impurities by soaking for 18 hours, washed with clean water to neutrality, dehydrated, and dried to obtain pretreated cellulose fibers;

[0046] B. Configure a 4% silane coupling agent kh560 solution, add acetic acid, mix evenly, and adjust the pH to 5;

[0047]C. Chitosan solution with a concentration of 2-5%, add sodium hydroxide, mix evenly, and adjust the pH to 11; (2) Preparation of silane coupling agent kh560 grafted fibers

[0048] In the reaction tank, soak the cellulose fibers pretreated in step (1)A in the silane coupling agent kh560 solution in step (1)B at a liquor ratio of 1:20, stir evenly, heat to 70°C, and keep warm 6h, washed with clean water, dehydrated,...

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