Polyester fiber modified with dihydric alcohol with main chain containing silicon and preparation method of polyester fiber
A technology for modifying polyester and diol, which is applied in the field of polyester fiber, can solve problems such as high cost, high energy consumption, and lack of active groups, and achieve the effects of increasing activity, reducing the amount of addition, and improving dyeing performance
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Embodiment 1
[0053] A kind of preparation method of main chain silicon-containing glycol modified polyester fiber, the steps are as follows:
[0054] (1) Preparation of doped modified Sb 2 o 3 ;
[0055] (1.1) Mg(NO 3 ) 2 aqueous solution with a concentration of 8 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, the Mg in the mixture 2+ with Sb 3+ The molar ratio is 2:100;
[0056] (1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 9 to obtain a precipitated product, and then wash and dry the precipitated product at a temperature of 105° C. for 2.5 hours;
[0057] (1.3) The dried product was first heated to 400°C and then kept for 2.5h, then heated to 900°C and kept for 1.5h, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.4 microns 2 o 3 Powder;
[0058](2) prepare modified polyester;
[0059] (2.1) Esterification r...
Embodiment 2
[0074] A kind of preparation method of main chain silicon-containing glycol modified polyester fiber, the steps are as follows:
[0075] (1) Preparation of doped modified Sb 2 o 3 ;
[0076] (1.1) The concentration of 0.5mol% Ca(NO 3 ) 2 Aqueous solution with a concentration of 5 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, the Ca in the mixture 2+ with Sb 3+ The molar ratio is 1:100;
[0077] (1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 10 to obtain a precipitated product, and then wash and dry the precipitated product at a temperature of 110° C. for 2 hours;
[0078] (1.3) The dried product was first heated to 400°C and then kept for 2h, then heated to 900°C and kept for 1h, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.4 microns 2 o 3 Powder;
[0079] (2) prepare modified polyester;
[008...
Embodiment 3
[0091] A kind of preparation method of main chain silicon-containing glycol modified polyester fiber, the steps are as follows:
[0092] (1) Preparation of doped modified Sb 2 o 3 ;
[0093] (1.1) Ba(NO 3 ) 2 Aqueous solution with a concentration of 10 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, Ba in the mixture 2+ with Sb 3+ The molar ratio is 3:100;
[0094] (1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH of the mixed solution is 9.5 to obtain a precipitated product, and then wash and dry the precipitated product at a temperature of 105° C. for 3 hours;
[0095] (1.3) The dried product was first heated to 400°C and kept for 3 hours, then heated to 900°C and kept for 2 hours, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.5 microns 2 o 3 Powder;
[0096] (2) prepare modified polyester;
[0097] (2.1) Esterification reaction...
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