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Preparation method of mixture of polyester and thermoplastic starch rich in starch and application thereof

A thermoplastic starch and high-starch technology, which is applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve problems such as inability to maintain solid state, decline in material mechanical properties, and weak interface interaction, etc., to achieve effective Conducive to popularization and utilization, improved hydrophobicity, and shortened film-hanging time

Active Publication Date: 2013-07-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current problem is that the start-up speed of the reactor using biodegradable polymers as solid carbon sources is slow, and the denitrification effects of PHB, PCL and PLA are still limited compared with traditional carbon sources (methanol and ethanol). gap
After this material is put into the sewage, on the one hand, due to the weak interfacial interaction, the starch is hydrolyzed in the water body, causing the content of organic carbon in the water body to rise rapidly, and the release of organic carbon is uncontrolled. This has been obtained in the research of some scholars. On the other hand, the mechanical properties of the material decrease, making the material unable to maintain a stable solid state in water

Method used

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  • Preparation method of mixture of polyester and thermoplastic starch rich in starch and application thereof
  • Preparation method of mixture of polyester and thermoplastic starch rich in starch and application thereof
  • Preparation method of mixture of polyester and thermoplastic starch rich in starch and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of high starch content thermoplastic starch, polyester blend, carry out according to following steps:

[0029](1) Preparation of thermoplastic starch with high starch content: add 3.3g urea, 7.7g formamide and 5g glycerol to a 100ml beaker, stir with a glass rod in a 90°C water bath until the mixture is colorless and transparent, and quickly Transfer the colorless and transparent composite plasticizer to a 250ml beaker, add 85g of cornstarch, put it in a water bath at 90°C, and stir it with an electric stirrer at the gear 2 until the starch turns waxy yellow Solid state, then, this sallow solid matter is sealed for 24 hours, so that the plasticizer is fully mixed in the starch, and after 24 hours, the sealed solid is kneaded in the internal mixer of the torque rheometer , take out the kneaded material, and crush it into granules by a high-speed pulverizer to obtain thermoplastic starch (TPS) with high starch content.

[0030] (2) Preparatio...

Embodiment 2

[0032] A kind of preparation method of high starch content thermoplastic starch, polyester blend, carry out according to following steps:

[0033] (1) Preparation of thermoplastic starch with high starch content: add 3.3g urea, 7.7g formamide and 5g glycerol to a 100ml beaker, stir with a glass rod in a 90°C water bath until the mixture is colorless and transparent, and quickly Transfer the colorless and transparent composite plasticizer to a 250ml beaker, add 85g of cornstarch, put it in a water bath at 90°C, and stir it with an electric stirrer at the gear 2 until the starch turns waxy yellow Solid state, then, this sallow solid matter is sealed for 24 hours, so that the plasticizer is fully mixed in the starch, and after 24 hours, the sealed solid is kneaded in the internal mixer of the torque rheometer , take out the kneaded material, and crush it into granules by a high-speed pulverizer to obtain thermoplastic starch (TPS) with high starch content.

[0034] (2) Preparati...

Embodiment 3

[0036] A kind of preparation method of high starch content thermoplastic starch, polyester blend, carry out according to following steps:

[0037] (1) Preparation of thermoplastic starch with high starch content: add 3.3g urea, 7.7g formamide and 5g glycerol to a 100ml beaker, stir with a glass rod in a 90°C water bath until the mixture is colorless and transparent, and quickly Transfer the colorless and transparent composite plasticizer to a 250ml beaker, add 85g of cornstarch, put it in a water bath at 90°C, and stir it with an electric stirrer at the gear 2 until the starch turns waxy yellow Solid state, then, this sallow solid matter is sealed for 24 hours, so that the plasticizer is fully mixed in the starch, and after 24 hours, the sealed solid is kneaded in the internal mixer of the torque rheometer , take out the kneaded material, and crush it into granules by a high-speed pulverizer to obtain thermoplastic starch (TPS) with high starch content.

[0038] (2) Preparati...

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Abstract

The invention discloses a preparation method of a mixture of polyester and thermoplastic starch rich in starch and an application thereof, belonging to the technical field of environment protection. According to the method, the polyester and the thermoplastic starch rich in starch are taken as the raw materials, and addition agents such as aluminic acid ester coupling reagent and the like are added, thermoplastic starch / polyester blending material is prepared through banburying by a torque rheometer, and then a product is prepared through smashing, extrusion and pelleting. The thermoplastic starch base mixture rich in starch can be used as both a carbon source and a biofilm carrier for denitrification in the water treatment deep denitrification technology, so that the defect that the carbon source dosage is not easy to control in a conventional denitrification technology is overcome, the defects that the microorganism is difficult to form a membrane, the cost is high and the staring time is long when only biodegradable polymer is taken as a solid carbon source are overcome, and the thermoplastic starch base mixture rich in starch has strong adaptability to both water dissolved oxygen concentration and pH.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method and application of a thermoplastic starch with high starch content and a polyester blend. Background technique [0002] By the end of 2007, there were 1,178 urban sewage treatment plants in operation in China, with a sewage treatment capacity of about 72.06 million tons per day, and about 90% of the urban sewage treatment plants were designed to meet the first-class B standard. Urban sewage treatment plants collect and treat most of the urban domestic sewage, so the discharge volume is very large. At the same time, with the acceleration of industrialization and urbanization, the displacement of this part is growing rapidly. This causes a lot of pressure on the environment in a certain area. If the urban sewage treatment plant is still designed and operated according to the old Class B discharge standard, the nitrogen and phosphor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/02C08K5/21C08K5/20C08K5/053C08K5/10C08K5/54C02F3/00C02F101/16
Inventor 吉芳英张千徐璇姜宁周卫威周碧邹秋林明浩
Owner CHONGQING UNIV
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