A kind of flame-retardant silk and its preparation method and application
A technology of silk and tannic acid, used in flame-retardant fibers, textiles and papermaking, animal fibers, etc., can solve the problems of high processing cost, high price, harm to the environment and human body, etc., and achieves excellent durability and obvious effect. , the effect of low price
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Embodiment 1
[0022]S1, 20% (relatively weight of silk) is dissolved in water, stirred at room temperature for 10 min, and the pH is adjusted to 4 using citric acid / phosphate buffer solution, and the silk is immersed in the above tannic acid solution. Medium, temperature rise to 90 ° C, heat insulation treatment 45min, remove silk, wash, dry.
[0023]S2, the silicate of the above tannic acid was immersed in 2 g / L of ferrous sulfate or ferrous sulfate solution, and treated 20 min, washed, dried to obtain a silky function of the flame retardant function of durability at 70 ° C.
[0024]The ultimate oxygen index of the silicone and sulfate joint treated silk is 27.5%, which is only 11.0 cm in length; the ultimate oxygen index of silk is 27.6%, which is only 27.6%, the length of damage is only 11.1cm. Silk-processed silk in combination of tanning acid and ferrous sulfate or iron sulfate is satisfied with my country's GB / T17591-2006 "flame retardant fabric" in the flame retardant performance requireme...
Embodiment 2
[0026]S1, 20% (relatively weight of silk) is dissolved in water, stirred at normal temperature for 10 min, using citric acid / phosphate bicycle buffer solution to adjust the pH of the above solution to 3; In the solution of acid solution, heated to 80 ° C, heat insulation for 75min, remove silk, washed, dried.
[0027]S2, the silk was immersed in a sulfate or titanium sulfate solution of the above tannin or titanium sulfate solution, washed, dried, and the silk of the flame retardant function of durability was obtained at 50 ° C.
[0028]The ultimate oxygen index of silk is 27.5%, which is only 12.3cm in length of the tannin, which is only 12.3 cm in length; the ultimate oxygen index of silk is 28.5%, which is only 10.0. CM. Silk silk-treated silicate and titanium sulfate or titanium sulfate meets the B1 level flame retardant performance requirements in my country GB / T17591-2006 "Flame Radades".
Embodiment 3
[0030]S1, respectively, 10%, 20%, and 30% (relatively weight of silk) is dissolved in water, stirred at room temperature for 10 min, using citric acid / phosphate bicycle buffer solution to adjust the pH of the above solution to 3 The silk is impiltrated into the above tannic acid solution, warmed to 90 ° C, heat insulation treatment for 60 min, remove silk, washed, dried.
[0031]S2, the silicate after the above tannic acid was immersed in 2 g / L of the ferrous sulfate solution, 30 min, washed, dried, and the silk of the durability of the flame retardant function was obtained.
[0032]As a comparative example, the ferrous sulfate treatment of ferrous sulfate is used alone: 30 min in a ferrous sulfate solution of 2 g / L in 2 g / L; alone use Single Ning Acid to treat silk: soil silk fabric in 20% (silkworm The relative weight of the tannic acid solution was treated at 90 ° C for 60 min.
[0033]Flame-retardant performance testing for unprocessed and treated silk fabrics, the results are ...
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