Lignin-containing bio-based composite material and preparation method thereof
A composite material and lignin technology, which is applied in the field of bio-based composite materials containing lignin and its preparation, can solve the impact of the strength and rigidity of lignin composite materials, the dispersion and compatibility between matrices are not outstanding, and the wood Reduce the environmental protection performance of plain composite materials and other problems, achieve good anti-ultraviolet radiation performance, improve thermal stability, and excellent mechanical properties
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[0073] Example 1
[0074] Preparation of bio-based polyamide polymers
[0075] (1) Take 100 g of methyl undecenoate and 1 g of 1,3-diamino-propanol and add it to 4 ml of tetrahydrofuran; after passing argon for half an hour, place it in a 40°C oil bath, add 10 ml of sodium methoxide, React at 40°C for 20 hours, and then recrystallize to obtain a white powdery solid, which is the desired functional polyamide monomer 1;
[0076] (2) Take 54g of functional polyamide monomer 1, 12g of butyric anhydride and 40mg of dimethylaminopyridine and place them in a round-bottomed flask, add 3ml of tetrahydrofuran to mix, and react at 50°C for 10 hours to obtain a clear solution, and the functional polyamide obtained by purification amide monomer 2;
[0077] (3) 1350mg functional polyamide monomer 2, 150mg functional polyamide monomer 1, 200mg oxadithiol, 10mg azobisisobutyronitrile catalyst and 10ml tetrahydrofuran were added to the reaction vessel; minutes, and then the mixture was plac...
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[0079] Example 2
[0080] Preparation method of bio-based composite material containing lignin
[0081] (1) 50 parts by weight of unmodified lignin (the lignin is not modified by chemical groups) and 50 parts by weight of the polyamide obtained in Example 1 were dried in a vacuum oven at 60° C. for 8h, and used for later use. ;
[0082] (2) mixing the dried lignin and polyamide in step (1), adding it to an internal mixer, and blending for 10 minutes at 100° C. and a rotational speed of 100 r / min;
[0083] (3) The mixture kneaded in step (2) is placed in a vacuum tableting machine, and pressed and formed at 150° C. to obtain a bio-based composite material containing lignin.
[0084] Example 2
[0085] Preparation method of bio-based composite material containing lignin
[0086] (1) 60 parts by weight of unmodified lignin and 40 parts by weight of the polyamide obtained in Example 1 were dried in a vacuum oven at 60°C for 8h, for subsequent use;
[0087] (2) mixing the drie...
Example Embodiment
[0089] Example 3
[0090] Preparation method of bio-based composite material containing lignin
[0091] (1) 70 parts by weight of unmodified lignin and 30 parts by weight of the polyamide obtained in Example 1 were dried in a vacuum oven at 60°C for 8h, for subsequent use;
[0092] (2) mixing the dried lignin and polyamide in step (1), adding it to an internal mixer, and blending for 10 minutes at 100° C. and a rotational speed of 100 r / min;
[0093] (3) The mixture kneaded in step (2) is placed in a vacuum tableting machine, and pressed and formed at 150° C. to obtain a bio-based composite material containing lignin.
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