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Preparation method and application of starch and poly(butylene succinate) thermoplastic blend

A polybutylene succinate and thermoplastic technology, which is applied in the field of environmental protection, can solve the problems that natural starch does not have thermoplastic processing properties, etc., to overcome the difficulty of controlling the dosage of carbon sources, reduce the cost of denitrification, and strong adaptability effect of ability

Inactive Publication Date: 2011-10-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The glass transition temperature and melting point of starch are higher than its thermal decomposition temperature, so native starch does not have thermoplastic processing properties

Method used

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  • Preparation method and application of starch and poly(butylene succinate) thermoplastic blend
  • Preparation method and application of starch and poly(butylene succinate) thermoplastic blend
  • Preparation method and application of starch and poly(butylene succinate) thermoplastic blend

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of thermoplastic blend of starch and polybutylene succinate, after stirring 50g cornstarch, 30gPBS (molecular weight 90000), 15g water and 5g wood powder, in a twin-screw extruder at 140~180 ℃ extrusion granulation.

Embodiment 2

[0021] The preparation method of starch and polybutylene succinate thermoplastic blend, after stirring 52g cornstarch, 30gPBS (molecular weight 90000), 13g water and 5g wood powder, extrude at 160 ℃ in twin-screw extruder out of granulation.

Embodiment 3

[0023] The preparation method of starch and polybutylene succinate thermoplastic blend, after 55g tapioca starch, 33gPBS (molecular weight 100000), 10g water and 2g KH-560 silane coupling agent are stirred, in twin-screw extruder Extrude and granulate at 140-180°C.

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PUM

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Abstract

The present invention discloses a preparation method and an application of a starch and poly(butylene succinate) thermoplastic blend, belonging to the technical field of environmental protection. The preparation method comprises the following steps of: adding a plasticizer and other additives to starch and poly(butylene succinate) serving as the raw materials, uniformly mixing under stirring, completely extruding with a twin-screw extruder and granulating to obtain a product. The obtained starch and poly(butylene succinate) thermoplastic blend is simultaneously used as a denitrification microbial carbon source and a biofilm carrier for water treatment, thus avoiding the defects that the carbon source adding amount is difficult to control in the conventional denitrification processes usingthe liquid carbon sources, and has strong adaptability to the DO (dissolved oxygen) content and pH value of inflow water.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of a thermoplastic blend of starch and polybutylene succinate and its application as a solid carbon source in removing nitrate in low C / N water. Background technique [0002] Nitrate nitrogen in water mainly comes from domestic sewage, agricultural waste and some industrial wastewater. At present, there are two types of nitrate nitrogen removal methods in water: physical chemical method and biological denitrification method. From two aspects of completely eliminating nitrate pollution and reducing the cost of denitrification, the heterotrophic biological denitrification method is the best practical method at present. When the concentration of organic matter in the water cannot meet the needs of biological denitrification, adding carbon sources becomes an inevitable choice. The conventional biological denitrification process adds...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L67/02C08L97/02C08K5/54B29B9/06B29C47/92C02F3/28C02F101/16B29C48/92
CPCB29C48/04B29C48/40B29C2948/92704B29C2948/92895
Inventor 王建龙沈志强
Owner TSINGHUA UNIV
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