Preparation method and application of a low temperature resistant shear thickening liquid
A low-temperature-resistant, liquid-resistant technology, applied in the field of low-temperature-resistant materials, can solve problems such as limiting the use range of shear thickening liquids and failure of shear thickening behavior, and achieves the effects of large flexibility, stable solution, and good low-temperature performance
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Embodiment 1
[0022] A kind of preparation method of low temperature resistance type shear thickening liquid, described preparation method comprises the following steps:
[0023] (1) Add 80 parts of a mixture of polyether polyol 8000 and 20 parts of silicone oil containing 0.01% of anionic surfactant AS-1, and 2 parts of polytetrafluoroethylene into a three-necked flask, mix well, and prepare a mixed dispersion medium;
[0024] (2) 300 parts of SiO with a particle size of 20nm 2 Put the particles in a 1000mL four-neck flask, add 250mL anhydrous toluene and 5mL 3-aminopropyltrimethoxysilane and mix ultrasonically for 30min, reflux at 110°C, and magnetically stir for 24h; Repeated washing with ethanol and acetone; then vacuum drying at 50°C to obtain positively charged micro-nano spherical silica particles;
[0025] (3) Add the positively charged micro-nano spherical silica particles prepared in step (2) into the mixed dispersion medium prepared in step (1), and use a ribbon stirrer at 800r...
Embodiment 2
[0028] A kind of preparation method of low temperature resistance type shear thickening liquid, described preparation method comprises the following steps:
[0029] (1) Add 60 parts of a mixture of polyether polyol 8000 and 40 parts of silicone oil containing 0.01% of anionic surfactant AS-1, and 2 parts of polytetrafluoroethylene into a three-necked flask, mix well, and prepare a mixed dispersion medium;
[0030] (2) 400 parts of SiO with a particle size of 20nm 2 Put the particles in a 1000mL four-neck flask, add 250mL anhydrous toluene and 5mL 3-aminopropyltrimethoxysilane and mix ultrasonically for 30min, reflux at 110°C, and magnetically stir for 24h; Repeated washing with ethanol and acetone; then vacuum drying at 50°C to obtain positively charged micro-nano spherical silica particles;
[0031] (3) Add the positively charged micro-nano spherical silica particles prepared in step (2) into the mixed dispersion medium prepared in step (1), and use a ribbon stirrer at 800r...
Embodiment 3
[0034] A kind of preparation method of low temperature resistance type shear thickening liquid, described preparation method comprises the following steps:
[0035] (1) Add 50 parts of a mixture of polyether polyol 8000 and 50 parts of silicone oil containing 0.01% of anionic surfactant AS-1, and 2 parts of polytetrafluoroethylene into a three-necked flask, mix well, and prepare a mixed dispersion medium;
[0036] (2) 480 parts of SiO with a particle size of 20nm 2 Put the particles in a 1000mL four-neck flask, add 250mL anhydrous toluene and 5mL 3-aminopropyltrimethoxysilane and mix ultrasonically for 30min, reflux at 110°C, and magnetically stir for 24h; Repeated washing with ethanol and acetone; then vacuum drying at 50°C to obtain positively charged micro-nano spherical silica particles;
[0037] (3) Add the positively charged micro-nano spherical silica particles prepared in step (2) into the mixed dispersion medium prepared in step (1), and use a ribbon stirrer at 800r...
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