A kind of xnbr vulcanizate containing bacterial cellulose whiskers and preparation method thereof
A technology of bacterial cellulose and vulcanizate, applied in the field of preparation of rubber-like polymer composite materials, can solve the problems of biocompatibility, poor biodegradability, low crystallinity, poor strength, etc., and achieve significant mechanical strength and improve mechanical strength. , the effect of high crystallinity
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Embodiment 1
[0033]Weigh 20g of bacterial cellulose and put it into the reactor, add 40% sulfuric acid solution, stir for 36h at a temperature of 60°C, centrifuge for 30min after the reaction, wash with deionized water to obtain bacterial cellulose whiskers, weigh 13g bacterial cellulose whiskers were dissolved in 1.3L deionized water, ultrasonic power was 125W, temperature was 20°C, and ultrasonic was 0.5h. Weigh 232g of 43% XNBR latex (equivalent to 100g of dry glue), add the dispersion of bacterial cellulose whiskers to the latex under magnetic stirring, ultrasonicate for 1h, and add 0.5g of anti-aging agent WL. The pH of the latex was adjusted to 2, and the latex was added to 5.5% KCl solution for flocculation, and then the flocculated gel was repeatedly washed with 100°C deionized water, and dried at 100°C for 2.5h. Add 4 grams of vulcanizing agent DCP and knead on an open mill. After the mixed rubber was parked for 24 hours, its positive vulcanization time at 160°C was measured by a...
Embodiment 2
[0035] Weigh 20g of bacterial cellulose and put it into the reactor, add 50% sulfuric acid solution, stir for 48h at a temperature of 50°C, centrifuge for 30min after the reaction, wash with deionized water to obtain bacterial cellulose whiskers, weigh Dissolve 5g of bacterial cellulose whiskers in 0.5L of deionized water, ultrasonic power is 125W, temperature is 20°C, and ultrasonic is 1h. Weigh 232g of 43% XNBR latex (equivalent to 100g of dry glue), add the dispersion of bacterial cellulose whiskers to the latex under magnetic stirring, ultrasonicate for 2 hours, and add 1 g of anti-aging agent RD. Adjust the pH value of the latex to 2, add the latex to 6.5% NaCl solution for flocculation, then use 100°C deionized water to repeatedly wash the flocculated gel, and dry it at 100°C for 2.5h. Add 3 grams of vulcanizing agent DTBP, and mix on an open mill. After the mixed rubber was parked for 24 hours, its positive vulcanization time at 160°C was measured by a vulcanizer, and ...
Embodiment 3
[0037] Weigh 20g of bacterial cellulose and put it into the reactor, add 60% sulfuric acid solution, stir for 36h at a temperature of 40°C, centrifuge for 30min after the reaction, wash with deionized water to obtain bacterial cellulose whiskers, weigh 3g of bacterial cellulose whiskers were dissolved in 0.3L of deionized water, ultrasonic power was 125W, temperature was 20°C, and ultrasonication was performed for 2h. Weigh 232g of 43% XNBR latex (equivalent to 100g of dry glue), add the dispersion of bacterial cellulose whiskers to the latex under magnetic stirring, ultrasonicate for 2 hours, and add 0.5g of anti-aging agent 4010NA. To adjust the pH of the latex to 3, add the latex to 6.5% CaCl 2 After flocculation in the solution, the flocculated gel was washed repeatedly with 100°C deionized water and dried at 100°C for 2.5 hours. Add 1 gram of vulcanizing agent BIPB and knead on an open mill. After the mixed rubber was parked for 24 hours, its positive vulcanization time...
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