A kind of rare earth modified fiber reinforced polylactic acid and its preparation method
A technology of fiber reinforcement and rare earth modification, which is applied in the field of rare earth modified fiber reinforced polylactic acid and its preparation, can solve the problem that the mechanical properties of polylactic acid need to be improved, the mechanical properties of polylactic acid are deteriorated, and it is difficult to obtain ultra-high tensile strength and tensile modulus. The amount of polylactic acid and other issues
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[0023] The invention provides a preparation method of rare earth modified fiber reinforced polylactic acid, comprising the following steps:
[0024] Mix the rare earth compound, cellulose fiber and water to obtain A solution;
[0025] dissolving polylactic acid in an organic solvent to obtain solution B;
[0026] Blending the A solution and the B solution to obtain the C solution;
[0027] Mixing the C solution and the flocculant to obtain the D solution;
[0028] Remove the water and organic solvent in the D solution to obtain solid E;
[0029] The solid E is hot-pressed to obtain rare earth modified fiber reinforced polylactic acid.
[0030] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.
[0031] The invention mixes rare earth compound, cellulose fiber and water to obtain A solution. In the present invention, the mass ratio of the rare earth compound to the cel...
Embodiment 1
[0050] In parts by weight, 5 parts of Ce(C 8 h 15 o 2 ) 3 , 50 parts of nanocellulose and 1100 parts of water were ultrasonically mixed at 30°C for 12 hours to obtain A solution;
[0051] 40 parts of PLLA were dissolved in 800 parts of dichloromethane to obtain B solution;
[0052] The A solution and the B solution were blended for 60 minutes and stirred to obtain the C solution;
[0053] Add 8 parts of polyacrylamide into the C solution, blend and stir at 30°C for 3 hours to obtain D solution;
[0054] The D solution was heated and concentrated on a rotary evaporator to obtain a colloid; the colloid was filtered and dried to obtain a solid E;
[0055] The solid E was placed between two stainless steel plates, and hot-pressed at 180° C. and 20 MPa for 2 minutes to obtain rare earth-modified fiber-reinforced polylactic acid.
[0056] The rare earth modified fiber reinforced polylactic acid prepared in this example has a tensile strength of 105 MPa and a tensile modulus of...
Embodiment 2
[0058] In parts by weight, 3 parts of La(ClO) 3 , 20 parts of softwood fiber and 460 parts of water were ultrasonically mixed at 50°C for 6 hours to obtain solution A;
[0059] 50 parts of PDLA and 27 parts of PLDLLA were dissolved in 1500 parts of toluene to obtain B solution;
[0060] The A solution and the B solution were blended for 90 minutes and stirred to obtain the C solution;
[0061] Add 5 parts of polyacrylamide and 5 parts of polyaluminum ferric silicate into the C solution, blend at 40°C for 2 hours and stir to obtain D solution;
[0062] The D solution was heated and concentrated on a rotary evaporator to obtain a colloid; the colloid was filtered and dried to obtain a solid E;
[0063] The solid E was placed between two stainless steel plates, and hot-pressed at 190° C. and 20 MPa for 3 minutes to obtain rare earth-modified fiber-reinforced polylactic acid.
[0064] The rare earth modified fiber reinforced polylactic acid prepared in this example has a tensil...
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Abstract
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