Bio-based composite material and preparation method and application thereof
A composite material and bio-based technology, applied in the field of bio-based composite materials, can solve the problems of reduced bending strength, hardness and wear resistance, reduced material toughness of hemicellulose, poor heat resistance of hemicellulose, etc., to achieve hardness and Enhanced wear resistance, poor heat resistance, and improved toughness
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Embodiment 1
[0037] Take 1 kg of barley straw produced in Jiangsu in 2008 (the cellulose content is 39.85 parts, the hemicellulose content is 37.50 parts, and the lignin content is 19.20 parts). , blasting under 1.0MPa for 8min, to remove hemicellulose, the mass ratio of the treated material is 0.61 kg, and the mass ratio of hemicellulose is 2.02 parts, the remaining solid components are taken out, washed and dried; Add 0.068 kg of polylactic acid binder (accounting for 8 parts of the total weight), then add antioxidant diaryl secondary amines, and melt and mix all the mixtures at 150 ° C; finally put the mixed materials into the press Press to make a plate, the mass ratio of each component in the plate and the performance test of the static bending strength, impact strength, tensile strength, bending strength and water absorption of the plate are shown in Table 2.
Embodiment 2
[0039] Take 1 kg of bagasse produced in Guangxi in 2008 (the content of cellulose is 45.24 parts, the content of hemicellulose is 19.27 parts, and the content of lignin is 32.65 parts). Soak for 10 minutes with 0.8% dilute sulfuric acid down, to remove hemicellulose, the material quality after treatment is 0.77 kilogram, and the mass ratio of hemicellulose is 1.18 parts, and remaining solid component is taken out, washes, and dries; Add 0.77 kilograms of chitosan binders (accounting for 28 parts of total weight) in the material handled well, add plasticizer phthalates again, and all mixtures melt and mix at 150 ℃; The material was put into a press and pressed into a plate. The mass ratio of each component in the plate and the static bending strength, impact strength, tensile strength, bending strength and water absorption performance tests of the plate are shown in Table 2.
Embodiment 3
[0041] Take 1 kg of rice straw produced in Hebei in 2008 (the cellulose content is 45.23 parts, the hemicellulose content is 19.80 parts, and the lignin content is 25.93 parts). Ca(OH) 2 Soak for 30 minutes to remove hemicellulose. The mass of the treated material is 0.74 kg, and the mass ratio of hemicellulose is 1.2 parts. The remaining solid components are taken out, washed and dried; then cellulose acetate is added to the pretreated material 0.25 kilograms of plain binder (accounting for 21 parts of total weight), then add stabilizer salicylate, and all mixtures are melted and mixed at 150°C; finally, the mixed material is put into a press and pressed into a plate, The mass ratio of each component in the sheet and the static bending strength, impact strength, tensile strength, bending strength and water absorption performance tests of the sheet are shown in Table 2.
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