Full-biodegradable starch foaming material and preparation method thereof

A starch-degrading, all-biological technology, applied in the field of bioplastics, can solve problems such as difficulty in obtaining supportive, tough foaming materials, lack of molding support, etc., and achieve uniform and fine foaming, good elasticity, and excellent film-forming properties Effect

Pending Publication Date: 2022-03-01
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Obviously, limited by technology, if only starch and plant fiber are used, it is difficult to obtain a foaming material that meets the requirements of support and toughness due to the lack of molding support for thermoplastic processing.

Method used

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  • Full-biodegradable starch foaming material and preparation method thereof
  • Full-biodegradable starch foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add tapioca starch, rice husk passing through a 20-mesh sieve, sorbitol, water, and hydroxypropyl cellulose into the high-speed mixer at a mass ratio of 100:8:2:20:1.5, and control the high-speed mixer The temperature is 85°C, the high-speed mixer is closed, the rotation speed is controlled at 500rpm, and the low-speed stirring is carried out for 20min to gelatinize the surface of the starch granules and obtain the pre-increased plastic;

[0034] (2) Add gluten, wheat bran, glyceryl monostearate, calcium dihydrogen phosphate, and fine talcum powder with a particle size of less than 2 μm to step (1) to obtain pre-increased plastics, and the amounts added are the mass of pre-increased plastics 2.5%, 4%, 0.4%, 0.8%, 0.02% of 2.5%, 4%, 0.4%, 0.8%, 0.02%; in the high-speed mixing mixer, keep the temperature at 85°C, close the high-speed mixer, control the speed at 1250rpm, stir at high speed for 8min, and discharge the material after mixing evenly;

[0035] (3) Put the m...

Embodiment 2

[0037](1) Add cornstarch, rice hulls passed through a 20-mesh sieve, sorbitol, water, and hydroxypropyl cellulose into the high-speed mixer at a mass ratio of 100:8:2:20:1.5, and control the high-speed mixer The temperature is 85°C, the high-speed mixer is closed, the rotation speed is controlled at 300rpm, and the low-speed stirring is carried out for 20min to gelatinize the surface of the starch granules and obtain the pre-increased plastic;

[0038] (2) Add gluten, wheat bran, glyceryl monostearate, calcium dihydrogen phosphate, and fine talcum powder with a particle size of less than 2 μm to step (1) to obtain pre-increased plastics, and the amounts added are the mass of pre-increased plastics 2.5%, 4%, 0.4%, 0.8%, 0.02% of 2.5%, 4%, 0.4%, 0.8%, 0.02%; in the high-speed mixing mixer, keep the temperature at 85°C, close the high-speed mixer, control the speed at 1250rpm, stir at high speed for 8min, and discharge the material after mixing evenly;

[0039] (3) Put the materi...

Embodiment 3

[0041] (1) Add tapioca starch, wheat straw passing through a 20-mesh sieve, sorbitol, water, and hydroxypropyl cellulose into the high-speed mixer at a mass ratio of 100:10:3:25:2, and control the high-speed mixer The temperature is 90°C, the high-speed mixer is closed, the rotation speed is controlled at 500rpm, and the low-speed stirring is carried out for 15 minutes to gelatinize the surface of the starch granules and obtain the pre-increased plastic;

[0042] (2) Add gluten, wheat bran, glyceryl monostearate, calcium dihydrogen phosphate, and fine talcum powder with a particle size of less than 2 μm to step (1) to obtain pre-increased plastics, and the amounts added are the mass of pre-increased plastics 3%, 5%, 0.5%, 1.0%, 0.03% of 3%, 5%, 0.5%, 1.0%, 0.03%; in the high-speed mixing mixer, keep the temperature at 90°C, close the high-speed mixer, control the speed at 1500rpm, stir at high speed for 10min, and discharge after mixing evenly;

[0043] (3) Put the material ob...

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Abstract

The invention relates to the field of bioplastics, and discloses a full-biodegradable starch foaming material and a preparation method thereof.The preparation method comprises the steps that firstly, native starch, plant fibers, sorbitol, water and hydroxy propyl cellulose are added into a high-speed mixer, the temperature is controlled to be 80-90 DEG C, low-speed stirring is conducted, the surfaces of starch particles are gelatinized, and pre-added plastics are obtained; then, wheat gluten, wheat bran, glyceryl monostearate, monocalcium phosphate and talcum powder are added into the pre-added plastic, and the mixture is stirred to be uniform at a high speed; and finally, adding the uniformly stirred material into a single-screw extruder, carrying out handless pressure extrusion at 115-120 DEG C, cooling the extruded material, crushing, sealing and packaging to obtain the full-biodegradable starch foaming material. Through comprehensive consideration of raw material selection and process, the foaming material prepared from the starch and the plant fibers meets extrusion foaming, and the foaming body is uniform, fine, closed and elastic, is suitable for being used as a feed or a fertilizer after being used, and can be reutilized.

Description

technical field [0001] The invention relates to the field of biological plastics, in particular to a fully biodegradable starch foaming material and a preparation method thereof. Background technique [0002] With the tightening of plastic restrictions and bans in countries around the world, especially the promulgation of China's strictest ban on plastics, the growth of global demand for biodegradable plastics has exceeded the original forecasts of various agencies. It is expected that global biodegradable plastics will usher in a period of rapid development. According to the current demand and proportion of biodegradable plastics in the Chinese market, it is predicted that the global demand for biodegradable plastics will reach 4.26 million tons by 2025. [0003] With the rapid development of the logistics and transportation industry, the demand for packaging materials has increased dramatically. All kinds of high-end fragile products such as handicrafts, cosmetics, electr...

Claims

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Application Information

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IPC IPC(8): C08J9/08C08L3/02C08L97/02C08L1/28C08L89/00C08K13/02C08K3/34C08K5/103C08K3/32C08K5/053
CPCC08J9/08C08J9/0061C08J9/0066C08J9/0023C08J9/0095C08J2203/02C08J2303/02C08J2497/02C08J2401/28C08J2489/00C08J2205/052
Inventor 曾军堂陈庆霍庆城司文彬李钧
Owner CHENDU NEW KELI CHEM SCI CO LTD
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