Method for preparing nano-silver antibacterial cotton fabric by self-reduction
A technology of antibacterial cotton and nano-silver, which is applied in the field of antibacterial cotton fabric preparation and self-reduction preparation of nano-silver antibacterial cotton fabric, which can solve the problems of low preparation rate, waste, and fast preparation speed, and achieve the effect of green technology
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[0023] Example 1:
[0024] The pretreated cotton fabric was immersed in 0.1mmol / L, 0.3mmol / L, 0.5mmol / L, 1mmol / L, 1.5mmol / L and 2mmol / L silver nitrate solution respectively, the bath ratio was 1:50, and then After being immersed for 60 minutes at a constant temperature of 85°C, take it out and place it in clean water for washing. Under normal temperature conditions, stir with an overhead stirrer at a speed of 300r / min for 5 minutes, repeat the stirring for 3 times, and then air dry.
[0025] Analysis of results:
[0026] Such as figure 1 Shown are the results of cold field emission scanning electron microscopy on the surface of antibacterial cotton fabric obtained by the self-reduction method. figure 1 a is unfinished cotton fiber, figure 1 b is the fiber treated with 0.5mmol / L silver nitrate solution, figure 1 c is the fiber treated with 2mmol / L silver nitrate solution. Unfinished cotton fabric, the fiber surface has the inherent longitudinal stripes of cotton fiber, and the surfac...
Example Embodiment
[0029] Example 2:
[0030] The pre-treated cotton fabric was immersed in a 1.5mmol / L silver nitrate solution with a bath ratio of 1:50, and then at 25℃, 50℃, 70℃, 75℃, 80℃ and 85℃. After being immersed at a constant temperature for 60 minutes, take it out and place it in clean water for washing. Under normal temperature conditions, use an overhead stirrer to stir for 5 minutes at a speed of 300r / min, repeat the stirring for 3 times, and then dry it naturally.
[0031] Analysis of results:
[0032] Such as figure 2 As shown in b, when the temperature is higher than 85℃, the increase in temperature does not increase the content of silver element much, indicating that when the temperature reaches 85℃, the reduction of nano-silver basically tends to be saturated. Therefore, it can be known that the self-reduction method is used to prepare nano-antibacterial For cotton fabrics, the best reaction temperature is 85°C.
Example Embodiment
[0033] Example 3:
[0034] The pretreated cotton fabric was immersed in a 1.5mmol / L silver nitrate solution under the conditions of bath ratios of 1:30, 1:50 and 1:70 respectively. After being immersed at a constant temperature of 85°C for 60 minutes, it was taken out and placed in clean water. For cleaning, under normal temperature conditions, use an overhead stirrer to stir for 5 minutes at a speed of 300r / min, repeat stirring for 3 times, and then dry naturally.
[0035] Analysis of results:
[0036] Such as figure 2 c shows that when the bath ratio is higher than 1:50, the increase of the bath ratio hardly increases the silver content, indicating that when the bath ratio is 1:50, the reduction of nano-silver basically tends to be saturated. Therefore, it can be known that When preparing nano antibacterial cotton fabric by reduction method, the best liquor ratio is 1:50.
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