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Preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material

A thermoplastic material, polycaprolactone technology, applied in the chemical industry to achieve the effect of increasing cost and improving performance

Inactive Publication Date: 2012-09-05
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After grafting modified starch, the compatibility with general plastics has been significantly improved, and the mechanical properties of the material have been improved, but the graft itself is non-biodegradable, which is contrary to the original intention of biodegradable materials.

Method used

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  • Preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material
  • Preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material, comprising the following steps:

[0023] The commercially available glutinous rice is puffed into glutinous rice sticks by a popping puffing machine, and then directly ground into puffed glutinous rice flour with a mortar, and dried in a vacuum drying oven for 48 hours to remove the adsorbed water on the surface, and stored in a desiccator for future use.

[0024] Add 6ml ε-caprolactone monomer, 2g puffed glutinous rice flour, and 2ml dry pyridine into a four-necked flask, stir to make it fully mixed, and put the four-necked flask into an oil bath at 120°C; Nitrogen is passed through the four-necked flask, degassed and dehydrated for 2 hours, and impurities such as moisture and oxygen in the flask are removed;

[0025] Weigh 0.5g of stannous octoate and put it into dry pyridine to form a 20% pyridine solution. Under the protection of nitrogen, add the 20% pyridine solution drop...

Embodiment 2

[0028] A preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material, comprising the following steps:

[0029] The commercially available glutinous rice is puffed into glutinous rice sticks by a popping puffing machine, and then directly ground into puffed glutinous rice flour with a mortar, and dried in a vacuum drying oven for 48 hours to remove the adsorbed water on the surface, and stored in a desiccator for future use.

[0030] Add 13ml ε-caprolactone monomer, 4g puffed glutinous rice flour, and 2ml dry pyridine into a four-necked flask, stir to make it fully mixed, and put the four-necked flask into an oil bath at 120°C; Nitrogen was passed through the four-neck flask, degassed and dehydrated for 2 hours, and impurities such as moisture and oxygen in the flask were removed.

[0031] Weigh 0.5g of stannous octoate and put it into dry pyridine to form a 20% pyridine solution. Under the protection of nitrogen, add the 20% pyridine solution dro...

Embodiment 3

[0034] A preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material, comprising the following steps:

[0035] The commercially available glutinous rice is puffed into glutinous rice sticks by a popping puffing machine, and then directly ground into puffed glutinous rice flour with a mortar, and dried in a vacuum drying oven for 48 hours to remove the adsorbed water on the surface, and stored in a desiccator for future use.

[0036] Add 10ml ε-caprolactone monomer, 3g puffed glutinous rice flour, and 2ml dry pyridine into a four-necked flask, stir to make it fully mixed, and put the four-necked flask into an oil bath at 120°C; Nitrogen was passed through the four-neck flask, degassed and dehydrated for 2 hours, and impurities such as moisture and oxygen in the flask were removed.

[0037] Weigh 0.5g of stannous octoate and put it into dry pyridine to form a 20% pyridine solution. Under the protection of nitrogen, add the 20% pyridine solution dro...

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Abstract

The invention relates to a preparation method of a glutinous rice flour grafted polycaprolactone thermoplastic material, which comprises the following steps: expanding glutinous rice into a glutinous rice rod, grinding, drying, and dewatering; dissolving the dry expanded glutinous rice flour in pyridine, pouring the solution into a four-neck flask, placing the four-neck flask in an oil bath, and adding an epsilon-caprolactone monomer; introducing nitrogen gas to the four-neck flask, degassing, and dewatering; preparing stannous octoate and pyridine into a pyridine solution, adding the pyridine solution into the four-neck flask under the protection of the nitrogen, stirring to perform a reaction, stopping heating, continuing to introduce nitrogen gas while stirring, and stopping the reaction when the reactant temperature is cooled to below 60 DEG C; and depositing the reaction product, filtering, extracting the obtained product with methyl benzene to obtain milk white flour, and carrying out vacuum drying to obtain the required expanded glutinous rice flour grafted polycaprolactone thermoplastic material. The method in the invention saves the cost by directly replacing glutinous rice starch with glutinous rice flour, and provides a preparation method for preparing a novel thermoplastic starch material in order to overcome the defects of the prior art.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing a thermoplastic material. Background technique [0002] Polymer materials are the most rapidly developed materials in the last century, but most polymers are derived from petroleum, a non-renewable energy source. Facing the global energy crisis and continuously increasing environmental pollution, the requirement to produce new biodegradable polymers is becoming more and more urgent. Biodegradable polymer materials are one of the research hotspots in the field of polymer materials today. Natural polymer materials, especially polysaccharide natural polymer materials, not only can be completely biodegraded, but also have abundant sources, can be regenerated, and are cheap. Therefore, compared with synthetic polymers, they have greater development potential. Using natural polymers as The development of fully biodegradable sheets, pellets and membrane material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/664C08B31/00
Inventor 李凤红朱海峰杨旭鹏李志军孙勇郭立颖马少君
Owner SHENYANG POLYTECHNIC UNIV
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