Preparation method of polylactic acid/nano-cellulose composite material
A nanocellulose and composite material technology is applied in the field of preparation of polylactic acid/nanocellulose composite materials to achieve the effects of improving interfacial adhesion, convenient and quick preparation, and solving the problem of uniform dispersion.
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Embodiment 1
[0018] A kind of preparation method of polylactic acid / nanocellulose composite material, described polylactic acid / nanocellulose composite material comprises each component of following percentage by weight: polylactic acid 84%, nanocellulose 6%, polyethylene glycol 10% , the preparation method comprises the following steps:
[0019] (1) Preparation of nanocellulose suspension by acid hydrolysis: Prepare an aqueous solution of microcrystalline cellulose (5 g of microcrystalline cellulose) with a mass percentage of 10%, and then add it dropwise to the aqueous solution of microcrystalline cellulose while stirring in an ice-water bath Concentrated sulfuric acid until the concentration of sulfuric acid reaches 50%, stir and react at 40°C for 1.5h, centrifuge the resulting suspension at 12000rpm for 10min, remove the supernatant, repeat five times, and ultrasonicate the centrifuged sample 3 times in an ice-water bath, each time Sonicate for 10 minutes, and then adjust the pH value ...
Embodiment 2
[0023] A preparation method of polylactic acid / nanocellulose composite material, said polylactic acid / nanocellulose composite material comprises the following components in weight percentage: polylactic acid 88%, nanocellulose 2%, polyethylene glycol 10% , the preparation method comprises the following steps:
[0024] (1) Preparation of nanocellulose suspension by acid hydrolysis: Prepare an aqueous solution of microcrystalline cellulose (5 g of microcrystalline cellulose) with a mass percentage of 10%, and then add it dropwise to the aqueous solution of microcrystalline cellulose while stirring in an ice-water bath Concentrated sulfuric acid until the concentration of sulfuric acid reaches 50%, stir and react at 40°C for 1.5h, centrifuge the resulting suspension at 12000rpm for 10min, remove the supernatant, repeat five times, and ultrasonicate the centrifuged sample 3 times in an ice-water bath, each time Sonicate for 10 minutes, and then adjust the pH value to neutral with ...
Embodiment 3
[0028] A kind of preparation method of polylactic acid / nanocellulose composite material, described polylactic acid / nanocellulose composite material comprises each component of following percentage by weight: polylactic acid 88%, nanocellulose 6%, polyethylene glycol 6% , the preparation method comprises the following steps:
[0029] (1) Preparation of nanocellulose suspension by acid hydrolysis: Prepare an aqueous solution of microcrystalline cellulose (10 g of microcrystalline cellulose) with a mass percentage of 10%, and then add it dropwise to the aqueous solution of microcrystalline cellulose while stirring in an ice-water bath Concentrated sulfuric acid until the concentration of sulfuric acid reaches 50%, stir and react at 40°C for 1.5h, centrifuge the resulting suspension at 12000rpm for 10min, remove the supernatant, repeat five times, and ultrasonicate the centrifuged sample 3 times in an ice-water bath, each time Sonicate for 10 minutes, and then adjust the pH value ...
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