Preparation method of chitosan tubular bracket
A technology of chitosan and chitosan solution, which is applied in the fields of biomedical materials and tissue engineering, can solve problems such as lack of research reports, unevenness, and difficulty in preparing chitosan tubes, and achieve firm suture connections, good elasticity and The effect of strength and simple process
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Embodiment 1
[0024] 1) Two 21-count chitosan yarns are plyed together, and the warp direction braiding method is used to adjust the appropriate tension and walking speed, and weave into a hollow network tube with an inner diameter of 3mm and a wall thickness of about 1.0mm;
[0025] 2) Take the hollow network pipe 300mm, and insert a stainless steel mandrel with a diameter of 3mm and a circular cross section into the hollow network pipe;
[0026] 3) Take 1 gram of chitosan with a deacetylation degree of 83% and dissolve it in 100 ml of 1% acetic acid solution, stir and dissolve, and prepare a 1% (w / v) chitosan solution. After the chitosan is completely dissolved, filter with 200-mesh nylon cloth, depressurize and pump air at room temperature to eliminate the bubbles in the solution;
[0027] 4) Immerse the chitosan tube supported by the mandrel into the chitosan solution from which air bubbles have been removed, rotate slowly, and take it out vertically.
[0028] 5) Place the chitosan tub...
Embodiment 2
[0033] 1) Two chitosan yarns of 21 counts are plyed, and the appropriate tension and walking speed are adjusted by the method of warp direction weaving, and a hollow network tube with an inner diameter of 6 mm and a wall thickness of about 1.0 mm is woven;
[0034] 2) Take 100 mm of the hollow network pipe, and insert a polytetrafluoroethylene mandrel with a diameter of 6 mm and a circular section into the hollow network pipe.
[0035] 3) Take 3 grams of chitosan with a deacetylation degree of 90% and dissolve it in 100 ml of 5% acetic acid solution, stir and dissolve, and prepare a 3% (w / v) chitosan solution. After the chitosan is completely dissolved, it is filtered with 200 mesh nylon cloth. Then prepare 100 ml of 20% (w / v) gelatin aqueous solution, mix the two, heat and stir at 50° C. until uniform, and pump air under reduced pressure at room temperature to eliminate air bubbles in the solution.
[0036] 4) Immerse the chitosan tube supported by the mandrel into the chito...
Embodiment 3
[0042] 1) With 21 pieces of chitosan yarn, 4 strands are plyed, and the appropriate tension and walking speed are adjusted by the method of warp direction weaving, and the hollow network tube with an inner diameter of 1 mm and a wall thickness of about 0.5 mm is woven;
[0043] 2) Take the hollow network pipe 200 mm, insert a rod-shaped mandrel with a diameter of 1 mm, a circular cross section, a stainless steel rod as the inner core, and a polytetrafluoroethylene tube as the outer layer, into the hollow network pipe;
[0044] 3) Take 2 grams of chitosan with a deacetylation degree of 93% and dissolve it in 100 ml of 1% acetic acid solution, stir and dissolve, and prepare a 2% (w / v) chitosan solution. After the chitosan is completely dissolved, filter with 200-mesh nylon cloth, and depressurize at room temperature to remove air bubbles in the solution.
[0045] 4) Immerse the chitosan tube supported by the mandrel into the chitosan solution from which air bubbles have been rem...
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