High temperature resistant starch composite and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant starch composite material and a preparation method thereof, which comprises the following raw materials in parts by weight: 2-5 parts of nano-aluminum hydroxide, 1.2-2.0 parts of a modifier, and 20-35 parts of polystyrene Vinyl fluoride, 55-75 parts of starch, 0.3-0.8 parts of coupling agent, 2-5 parts of cross-linking agent, 5-10 parts of triallyl isocyanurate, 0.1-0.3 parts of stearin Zinc acid; the present invention composites nano-aluminum hydroxide and starch after targeted modification, and disperses nano-aluminum hydroxide evenly in the starch system. applications in many fields.

Description

technical field

[0001] The invention relates to the field of modified materials, in particular to a high-temperature-resistant starch composite material and a preparation method thereof. Background technique

[0002] Starch is a natural high-molecular polymer with a large number of hydroxyl groups in its molecule, so the interaction between starch macromolecules is very strong, which makes it difficult for the original starch to be melt-processed. Compatibility is also poor. However, these hydroxyl groups can undergo chemical reactions such as esterification, etherification, grafting, and crosslinking. These chemical reactions are used to chemically modify the starch, reduce the hydroxyl groups of the starch, change its original structure, thereby changing the corresponding properties of the starch, and turning the original starch into a thermoplastic starch. Cross-linked starch uses starch as raw material, phosphorus oxychloride, sodium trimetaphosphate, adipic acid, and ...

Examples

Embodiment 1

[0031] (1) Treat 3 parts of nano aluminum hydroxide with 0.6 part of aluminate;

[0032] (2) Coating the nano-aluminum hydroxide treated with the coupling agent with 0.8 parts of isocyanate and 0.8 parts of trimethyl phosphate;

[0033] (3) Mix the coated nano-aluminum hydroxide with 65 parts of starch with a degree of polymerization of 800, and then extrude in a parallel electric field with an electric field strength of 1.2kv / m and a constant electric field direction to obtain a mixture;

[0034] (4) Combine the mixture obtained in step 3 with 28 parts of polytetrafluoroethylene with a degree of polymerization of 280, 4 parts of ethylene glycol dimethacrylate, 8 parts of triallyl isocyanurate, 0.2 parts The zinc stearate is uniformly mixed and then extruded to obtain a high temperature resistant starch composite material.

Embodiment 2

[0036] (1) Treat 2 parts of nano aluminum hydroxide with 0.3 part of aluminate;

[0037] (2) Coating the nano-aluminum hydroxide treated with the coupling agent with 0.6 parts of isocyanate and 0.6 parts of trimethyl phosphate;

[0038] (3) Mix the coated nano-aluminum hydroxide with 55 parts of starch with a degree of polymerization of 1000, and then extrude in an electric field with an electric field strength of 2.0kv / m to obtain a mixture;

[0039](4) Combine the mixture obtained in step 3 with 20 parts of polytetrafluoroethylene with a degree of polymerization of 180, 2 parts of ethylene glycol dimethacrylate, 5 parts of triallyl isocyanurate, 0.3 parts The zinc stearate is uniformly mixed and then extruded to obtain a high temperature resistant starch composite material.

Embodiment 3

[0041] (1) Treat 5 parts of nano aluminum hydroxide with 0.8 part of aluminate;

[0042] (2) Coating the nano aluminum hydroxide treated with the coupling agent with 1 part of isocyanate and 1 part of trimethyl phosphate;

[0043] (3) Mix the coated nano-aluminum hydroxide with 75 parts of starch with a degree of polymerization of 600, and then extrude in a parallel electric field with an electric field strength of 0.5kv / m and a constant electric field direction to obtain a mixture ;

[0044] (4) Combine the mixture obtained in step 3 with 35 parts of polytetrafluoroethylene with a degree of polymerization of 380, 5 parts of ethylene glycol dimethacrylate, 10 parts of triallyl isocyanurate, 0.1 parts The zinc stearate is uniformly mixed and then extruded to obtain a high temperature resistant starch composite material.

technical field

[0001] The invention relates to the field of modified materials, in particular to a high-temperature-resistant starch composite material and a preparation method thereof. Background technique

[0002] Starch is a natural high-molecular polymer with a large number of hydroxyl groups in its molecule, so the interaction between starch macromolecules is very strong, which makes it difficult for the original starch to be melt-processed. Compatibility is also poor. However, these hydroxyl groups can undergo chemical reactions such as esterification, etherification, grafting, and crosslinking. These chemical reactions are used to chemically modify the starch, reduce the hydroxyl groups of the starch, change its original structure, thereby changing the corresponding properties of the starch, and turning the original starch into a thermoplastic starch. Cross-linked starch uses starch as raw material, phosphorus oxychloride, sodium trimetaphosphate, adipic acid, and ...

Examples

Embodiment 1

[0031] (1) Treat 3 parts of nano aluminum hydroxide with 0.6 part of aluminate;

[0032] (2) Coating the nano-aluminum hydroxide treated with the coupling agent with 0.8 parts of isocyanate and 0.8 parts of trimethyl phosphate;

[0033] (3) Mix the coated nano-aluminum hydroxide with 65 parts of starch with a degree of polymerization of 800, and then extrude in a parallel electric field with an electric field strength of 1.2kv / m and a constant electric field direction to obtain a mixture;

[0034] (4) Combine the mixture obtained in step 3 with 28 parts of polytetrafluoroethylene with a degree of polymerization of 280, 4 parts of ethylene glycol dimethacrylate, 8 parts of triallyl isocyanurate, 0.2 parts The zinc stearate is uniformly mixed and then extruded to obtain a high temperature resistant starch composite material.

Embodiment 2

[0036] (1) Treat 2 parts of nano aluminum hydroxide with 0.3 part of aluminate;

[0037] (2) Coating the nano-aluminum hydroxide treated with the coupling agent with 0.6 parts of isocyanate and 0.6 parts of trimethyl phosphate;

[0038] (3) Mix the coated nano-aluminum hydroxide with 55 parts of starch with a degree of polymerization of 1000, and then extrude in an electric field with an electric field strength of 2.0kv / m to obtain a mixture;

[0039](4) Combine the mixture obtained in step 3 with 20 parts of polytetrafluoroethylene with a degree of polymerization of 180, 2 parts of ethylene glycol dimethacrylate, 5 parts of triallyl isocyanurate, 0.3 parts The zinc stearate is uniformly mixed and then extruded to obtain a high temperature resistant starch composite material.

Embodiment 3

[0041] (1) Treat 5 parts of nano aluminum hydroxide with 0.8 part of aluminate;

[0042] (2) Coating the nano aluminum hydroxide treated with the coupling agent with 1 part of isocyanate and 1 part of trimethyl phosphate;

[0043] (3) Mix the coated nano-aluminum hydroxide with 75 parts of starch with a degree of polymerization of 600, and then extrude in a parallel electric field with an electric field strength of 0.5kv / m and a constant electric field direction to obtain a mixture ;

[0044] (4) Combine the mixture obtained in step 3 with 35 parts of polytetrafluoroethylene with a degree of polymerization of 380, 5 parts of ethylene glycol dimethacrylate, 10 parts of triallyl isocyanurate, 0.1 parts The zinc stearate is uniformly mixed and then extruded to obtain a high temperature resistant starch composite material.

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