Light heat-preservation fiber and preparation method thereof
A thermal fiber, lightweight technology, applied in the field of polyester fiber, can solve the problems of long natural degradation time, limited chemical degradation recycling application, etc., to achieve the effect of increasing the natural degradation rate, shortening the dyeing time, and improving the dye uptake rate
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Embodiment 1
[0065] The preparation method of lightweight heat-retaining fiber, the steps are as follows:
[0066] (1) preparation of modified polyester;
[0067] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:
[0068] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;
[0069] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);
[0070] (1.2) Preparation of solid heteropolyacid powder SiO 2 -T...
Embodiment 2
[0088] The preparation method of lightweight heat-retaining fiber, the steps are as follows:
[0089] (1) preparation of modified polyester;
[0090] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:
[0091] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;
[0092] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);
[0093] (1.2) Preparation of solid heteropolyacid powder SiO 2 ...
Embodiment 3
[0104] The preparation method of lightweight heat-retaining fiber, the steps are as follows:
[0105] (1) preparation of modified polyester;
[0106] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:
[0107] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;
[0108] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);
[0109] (1.2) Preparation of solid heteropolyacid powder ...
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