Lignin-based multifunctional rubber additive as well as preparation method and application thereof
A rubber additive and lignin-based technology, applied in the field of rubber additives, can solve the problems of lignin's insignificant anti-aging effect and low anti-aging effect, achieve good chemical heat shielding effect, slow down the internal pyrolysis process, and lose weight Significant speed reduction effect
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Embodiment 1
[0036] (1) Dissolve 9g of p-aminodiphenylamine in 390g of toluene, add 9g of KH560 while stirring, and stir at 80°C for 4h to obtain solution A.
[0037] (2) Dissolve 30g of biochemical lignin in 100g of 0.1% sodium hydroxide solution, adjust the pH to 11, and obtain solution B;
[0038] (3) Add solution A to solution B, react at 100°C for 48 hours to obtain solution C;
[0039] (4) Add 1000ml of deionized water to solution C to dilute, add 20% sulfuric acid solution, until the brown product A is precipitated.
[0040] (5) Centrifuge at 8000 r / min for 8 min to remove unreacted p-aminodiphenylamine to obtain product B;
[0041] (6) Put the product B in a vacuum oven at 70°C and dry for 24 hours to obtain the lignin-based multifunctional rubber additive A.
Embodiment 2
[0043] (1) Dissolve 10g of p-phenylenediamine in 300g of toluene, add 10g of KH560 while stirring, and stir at 70°C for 6h to obtain solution A.
[0044] (2) Dissolve 5g of alkali lignin in 100g of 0.1% potassium hydroxide solution, adjust the pH to 10, and obtain solution B;
[0045] (3) Add solution A to solution B, react at 90°C for 60 hours to obtain solution C;
[0046] (4) Add 500ml of deionized water to solution C to dilute, add 10% nitric acid solution, until the brown product A is precipitated.
[0047] (5) Centrifuge at 6000 r / min for 10 min to remove unreacted p-aminodiphenylamine to obtain product B;
[0048] (6) Put the product B in a vacuum oven at 60°C and dry for 36 hours to obtain the lignin-based multifunctional rubber additive B.
Embodiment 3
[0050] (1) Dissolve 10g of p-aminodiphenylamine and p-phenylenediamine in a 1:1 mixture in 500g of toluene, add 10g of KH560 while stirring, and stir at 70°C for 2h to obtain solution A.
[0051] (2) Dissolve 20g of enzymatic lignin in 100g of 1% calcium hydroxide solution, adjust the pH to 10, and obtain solution B;
[0052] (3) Add solution A to solution B, react at 110°C for 36 hours to obtain solution C;
[0053] (4) Add 1500ml of deionized water to solution C to dilute, add 30% hydrochloric acid solution, until the brown product A is precipitated.
[0054] (5) Centrifuge at 10000 r / min for 6 min to remove unreacted p-aminodiphenylamine to obtain product B;
[0055] (6) Put the product B in a vacuum oven at 80°C and dry for 12 hours to obtain the lignin-based multifunctional rubber additive C.
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