Acid and alkali resistant bio-based adhesive and preparation method thereof
A kind of anti-acid and alkali and biological technology, which is applied in the direction of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of adhesives that are not environmentally friendly, poor acid and alkali resistance, etc., and achieve easy promotion and high adhesion Strength, the effect of simple preparation method
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Embodiment 1
[0035] (1) Dissolve 10g of a hyperbranched polyester with a molecular weight of 600 and 6 terminal carboxyl groups in 20mL of water, then place it in a three-necked flask, and add 0.16 g1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC•HCl) (prepared as an aqueous solution with a mass percentage concentration of 10%) and 0.095g N-hydroxysuccinyl Amine (NHS) (made into an aqueous solution with a concentration of 10% by mass), after stirring for 10 minutes, add 18.96 g of dopamine hydrochloride dissolved in 10 mL of water at 20°C, and react for 3 hours;
[0036] (2) Add 17.01g of tannic acid to the reaction system of step (1) (the molar ratio of dopamine and dopamine is 10:1, and it is prepared as an aqueous solution with a concentration of 10% by mass), and react at 20°C for 20 minutes 10.8g of ferric chloride was dissolved in 6mL of water and then added. After 10min of reaction, 1mL of triethylamine (TEA) was added to adjust the reaction pH to 9. After 0.5h of r...
Embodiment 2
[0038] (1) Dissolve 10g of hyperbranched polyester with a molecular weight of 8000 and 48 terminal carboxyl groups in 100mL of water, then place it in a three-necked flask, and add 0.024 g1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC•HCl) (prepared as a 10% aqueous solution by mass percentage) and 0.014g N-hydroxysuccinyl Amine (NHS) (made into an aqueous solution with a concentration of 10% by mass), after stirring for 10 minutes, add 11.38 g of dopamine hydrochloride dissolved in 10 mL of water at 20°C, and react for 8 hours;
[0039] (2) Add 9.7g of tannic acid to the reaction system of step (1) (the molar ratio of dopamine to tannic acid is 20:1, and it is prepared into an aqueous solution with a concentration of 50% by mass), and react at 20°C After 20 minutes, dissolve 4.9g of ferric chloride in 6mL of water and add it. After 10 minutes of reaction, add 1mL of triethylamine (TEA) to adjust the reaction pH to 9. After 3 hours of reaction, an acid-base r...
Embodiment 3
[0041] (1) Dissolve 10g of hyperbranched polyester with a molecular weight of 4800 and 24 terminal carboxyl groups in 50mL of water, then place it in a three-necked flask, and add 0.399 g1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC•HCl) (prepared as a 10% aqueous solution by mass percentage) and 0.24g N-hydroxysuccinyl Amine (NHS) (made into an aqueous solution with a concentration of 10% by mass), after stirring for 10 minutes, add 9.48 g of dopamine hydrochloride dissolved in 10 mL of water at 20°C, and react for 5 hours;
[0042] (2) Add 2.83 g of tannic acid to the hyperbranched polyester solution with a catechol-terminated structure in step (1) (the molar ratio of dopamine to tannic acid is 30:1, and the mass percentage concentration is 10% After reacting for 20 minutes at 20°C, dissolve 0.45g of ferric chloride in 6mL of water and add it. After reacting for 10 minutes, add 1mL of triethylamine (TEA) to adjust the pH value of the reaction to 9. After r...
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