Baffeta low-temperature neutral-approaching bleaching method
A cotton fabric, near-neutral technology, applied in the field of pre-processing of textiles, can solve the problems of fiber damage, heavy burden of wastewater treatment, high energy consumption, etc., and achieve the effect of high accuracy and strong reliability
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Embodiment 1
[0018] Example 1: TBCC / H 2 o 2 / NaHCO 3 Central combination design of system for cotton fabric bleaching experiment
[0019] Select the concentration of TBCC ([TBCC]), NaHCO 3 concentration ([NaHCO 3 ]), bleaching temperature (T), and bleaching time (t) are controllable variables. Each controllable variable is assigned five usage levels, and the usage levels of each variable are coded as: the lowest and highest level "±2", the high and low level "±1" and the center level "0", corresponding to the actual usage level As shown in Table 1:
[0020] Table 1 Controllable variables and dosage levels of the optimization model
[0021]
[0022] According to the four controllable variables and dosage levels shown in Table 1, the number of experiments (N) required to construct the optimization model can be calculated by the following formula:
[0023] N=2 n +2n+C
[0024] Among them: n is the number of controllable variables; 2 n is the number of factorial experimental point...
Embodiment 2
[0027] Example 2: TBCC / H 2 o 2 / NaHCO 3 Preparation of system and bleaching process of cotton fabric
[0028] According to the dosage levels of the variables in each experimental group shown in Table 2, a certain amount of TBCC and H 2 o 2 Add in a molar ratio of 1:1.2 to contain enough NaHCO 3 In the aqueous solution, prepare TBCC / H 2 o 2 / NaHCO 3 system; among them, NaHCO 3 Molarity higher than that of H 2 o 2 , and H 2 o 2 The molar mass of TBCC is higher than that of TBCC, the purpose is to ensure the complete reaction of TBCC; in addition, add 1g / L wetting agent and 1g / L oxygen bleaching stabilizer to the system. Put pure cotton fabric gray cloth in TBCC / H at a bath ratio of 15:1 2 o 2 / NaHCO 3 In the system, bleach at a specified temperature for a certain period of time. After the bleaching is finished, the bleached cotton fabric is washed and dried, and the whiteness value is tested (see Table 2). It should be noted that each group of experiments must b...
Embodiment 3
[0029] Embodiment 3: Construction of quadratic model
[0030] Select the quadratic model in response surface analysis as follows:
[0031] WI=A+P 1 x 1 +P 2 x 2 +P 3 x 3 +P 4 x 4 +P 12 x 1 x 2 +P 13 x 1 x 3 +P 14 x 1 x 4 +P 23 x 2 x 3 +P 24 x 2 x 4 +
[0032] P 34 x 3 x 4 +P 11 x 12 +P 22 x 2 2 +P 33 x 3 2 +P 44 x 4 2
[0033] Among them: A is a constant, X 1 …X 4 is the model variable, P 1 …P 44 is the model term coefficient.
[0034] The 30 groups of experimental data in Table 2 were used for regression operation and variance analysis on the above quadratic model, and the results are shown in Table 3.
[0035] Table 3 Response surface quadratic model variance analysis table
[0036] source of variation
sum of square
F value
p-value
Model
l381.61
14
27.26
18.48
<0.0001*
X 1
145.83
1
145.83
98.89
<0.0001*
X 2
0...
PUM
| Property | Measurement | Unit |
|---|---|---|
| whiteness | aaaaa | aaaaa |
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