A kind of preparation technology of chitosan oligosaccharide modified cotton fiber
A preparation process and a technology for modifying cellulose, which is applied in the field of chitosan oligosaccharide modified cotton fiber, can solve problems such as the decrease of breaking strength and elongation at break, the deterioration of mechanical properties of cotton fiber, and the decrease of half-life of fabric function, etc., to achieve antibacterial life extension, Low production cost and many antibacterial sites
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Embodiment 1
[0026] A kind of concrete steps of the preparation technology of chitosan oligosaccharide modified cotton fiber are as follows:
[0027] (1) Preparation of pretreated cotton fibers
[0028] First prepare the pretreatment liquid with a mass fraction of sodium hydroxide of 0.5% and pump it into the pretreatment tank, then disperse the cotton fibers according to the ratio of cotton fiber mass (kg) to pretreatment liquid volume (L) ratio of 1:8 In the pretreatment tank, heat up to 85°C and stir for 0.5h. Drain after the pretreatment is completed, collect respectively the waste liquid after the pretreated cotton fiber and the pretreated cotton fiber, to the collected cotton fiber through pretreatment, by cotton fiber mass (kg) and distilled water volume (L) ratio is 1:8 by adding distilled water to wash. Centrifugal separation is carried out after the cleaning is completed, and the rotational speed of the centrifuge is 500r / min. Collect the centrifugal sediment and the centrifug...
Embodiment 2
[0036] A kind of concrete steps of the preparation technology of chitosan oligosaccharide modified cotton fiber are as follows:
[0037] (1) Preparation of pretreated cotton fibers
[0038] With embodiment 1, feature is: prepare the pretreatment liquid that sodium hydroxide mass fraction is 0.1%, according to the ratio of cotton fiber mass (kg) and pretreatment liquid volume (L) ratio be 1: 10, be warming up to 90 ℃ , stirred for 1 h, added distilled water to wash according to the ratio of cotton fiber mass (kg) to distilled water volume (L) as 1:10, and the centrifuge speed was 1000r / min.
[0039] (2) Preparation of hydroxypropyl chitooligosaccharide solution
[0040] With embodiment 1, feature is: the control stirring speed is 100r / min, when distilled water is heated to 90 ℃, according to chitosan oligosaccharide quality (kg) and distilled water volume (L) ratio is the ratio of 1: 16, stirring and dissolving 45min, It is 0.0625kg / L oligochitosan solution to prepare oligoch...
Embodiment 3
[0046] A kind of concrete steps of the preparation technology of chitosan oligosaccharide modified cotton fiber are as follows:
[0047] (1) Preparation of pretreated cotton fibers
[0048] With embodiment 1, feature is: prepare the pretreatment liquid that the mass fraction of sodium hydroxide is 0.2%, be heated up to 100 ℃ according to the ratio of cotton fiber mass (kg) and pretreatment liquid volume (L) ratio of 1: 15 , stirred for 1.5h, added distilled water to wash according to the ratio of cotton fiber mass (kg) to distilled water volume (L) as 1:15, and the centrifuge speed was 1500r / min.
[0049] (2) Preparation of hydroxypropyl chitooligosaccharide solution
[0050] With embodiment 1, feature is: control stirring speed is 120r / min, when distilled water is heated to 100 ℃, according to chitosan oligosaccharide quality (kg) and distilled water volume (L) ratio is the ratio of 1: 10, stirring and dissolving 60min, It is 0.1kg / L oligochitosan solution to prepare oligoc...
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