A kind of starch-based foaming material and preparation method thereof
A foaming material, starch-based technology, applied in the field of starch-based foaming material and its preparation, can solve the problems of poor resilience, not easy to rebound, poor stability of foam materials, etc., to achieve fine and uniform foam structure, not easy to deform Effect of collapse and high cell wall strength
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Embodiment 1
[0040] The preparation of starch-based foaming material, concrete steps are as follows:
[0041] (1) In parts by weight, stir and mix 100 parts of corn starch (80 mesh), 2 parts of hydrogen peroxide, 1 part of ferrous sulfate, 15 parts of water and 0.5 part of citric acid, and heat to 60°C for 4 hours of oxidation reaction , cooling down and discharging to obtain component A for subsequent use;
[0042] (2) In parts by weight, after stirring and mixing 100 parts of polyvinyl alcohol (PVA-2099), 5 parts of PPG-400 and 1 part of sodium bicarbonate, component B was obtained and set aside;
[0043] (3) In parts by weight, 100 parts of component A, 10 parts of component B, 3 parts of carbonamide, 2 parts of ethylene-acrylic acid copolymer (EAA, AA content is 32%) and talcum powder (8000 mesh) 1 After the parts are stirred and mixed evenly, they are extruded and foamed by a single-screw extruder with a high compression ratio (the compression ratio is 4.5, and the length-to-diameter...
Embodiment 2
[0047] The preparation of starch-based foaming material, concrete steps are as follows:
[0048] (1) In parts by weight, stir and mix 100 parts of tapioca starch (100 mesh), 4 parts of hydrogen peroxide, 2 parts of ferrous sulfate, 20 parts of water and 0.8 part of citric acid, and then heat to 80°C for oxidation reaction for 2 hours , cooling and discharging to obtain component A for subsequent use;
[0049] (2) In parts by weight, after stirring and mixing 100 parts of polyvinyl alcohol (PVA-1399), 15 parts of PPG-800 and 3 parts of sodium bicarbonate, component B was obtained and set aside;
[0050] (3) In parts by weight, 100 parts of A component, 20 parts of B component, 8 parts of sulfuramide, 5 parts of ethylene-acrylic acid copolymer (EAA, AA content is 40%) and 3 parts of talcum powder (5000 mesh) After the parts are stirred and mixed evenly, they are extruded and foamed by a single-screw extruder with a high compression ratio (the compression ratio is 6.0, and the l...
Embodiment 3
[0054] The preparation of starch-based foaming material, concrete steps are as follows:
[0055] (1) In parts by weight, stir and mix 100 parts of corn starch (120 mesh), 6 parts of hydrogen peroxide, 3 parts of ferrous sulfate, 30 parts of water and 1.0 part of citric acid, and heat to 75°C for 3 hours of oxidation reaction , cooling and discharging to obtain component A for subsequent use;
[0056] (2) In parts by weight, after stirring and mixing 100 parts of polyvinyl alcohol (PVA-1799), 10 parts of PPG-600 and 2 parts of sodium bicarbonate, component B was obtained and set aside;
[0057] (3) In parts by weight, 100 parts of component A, 15 parts of component B, 5 parts of dicyandiamide, 3 parts of ethylene-acrylic acid copolymer (EAA, AA content is 36%) and talcum powder (6000 mesh) After the 2 parts are stirred and mixed evenly, they are extruded and foamed by a single-screw extruder with a high compression ratio (compression ratio is 5.0, length-to-diameter ratio is 3...
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