Preparation method of thermoplastic konjac glucomannan nanocomposite material

A technology of konjac glucomannan and nanocomposite materials, which is applied in the field of preparation of thermoplastic konjac glucomannan nanocomposite materials, can solve the problems of not yet large-scale production and insufficient mechanical strength, and achieve high strength, excellent hydrophobicity, The effect of performance improvement

Active Publication Date: 2017-05-10
SICHUAN BIOTECH FORCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained thermoplastic modified KGM has good hydrophobicity and thermoplasticity, but there are still pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of thermoplastic konjac glucomannan nanocomposite material, comprising the following steps:

[0032] Step 1: Get 15g of konjac glucomannan and add it to 100g of an alkaline solution with a concentration of 10wt%, then place it in a sealed container with stirring, feed nitrogen into it to make the solution saturated with nitrogen, and then place the sealed container Place in an electron accelerator for irradiation and stirring treatment for 1 hour, centrifuge, and dry to obtain pretreated konjac glucomannan;

[0033] Step 2: Add 20 g of pretreated konjac glucomannan, 5 g of inulin, 20 g of methyl acrylate, 5 g of styrene, 0.02 g of ammonium persulfate, 100 g of water, and 30 g of acetone into the supercritical reaction device, stir evenly, and then mix the system Seal it, feed carbon dioxide to 20MPa, and react under the conditions of 50°C for 1 hour, then release the pressure of carbon dioxide, add 0.02g of ammonium persulfate, 5g of vinyl acetate, ...

Embodiment 2

[0038] A preparation method of thermoplastic konjac glucomannan nanocomposite material, comprising the following steps:

[0039] Step 1: Get 20 g of konjac glucomannan and add it to 120 g of an alkaline solution with a concentration of 10 wt %, then place it in a sealed container with stirring, feed nitrogen into it to make the solution saturated with nitrogen, and then place the sealed container Place in an electron accelerator for irradiation and stirring treatment for 3 hours, centrifuge, and dry to obtain pretreated konjac glucomannan;

[0040] Step 2: Add 30 g of pretreated konjac glucomannan, 8 g of inulin, 25 g of methyl acrylate, 10 g of styrene, 0.08 g of ammonium persulfate, 150 g of water, and 50 g of acetone in a supercritical reaction device, and stir evenly , then seal the system, feed carbon dioxide to 30MPa, and react under the conditions of 65°C for 3 hours, then release the pressure of carbon dioxide, add 0.02g of ammonium persulfate, 10g of vinyl acetate, 5g...

Embodiment 3

[0045] A preparation method of thermoplastic konjac glucomannan nanocomposite material, comprising the following steps:

[0046] Step 1: Get 18 g of konjac glucomannan and add it to 110 g of an alkaline solution with a concentration of 10 wt %, then place it in a sealed container with stirring, feed nitrogen into it to make the solution saturated with nitrogen, and then place the sealed container Place in an electron accelerator for irradiation and stirring treatment for 2 hours, centrifuge, and dry to obtain pretreated konjac glucomannan;

[0047] Step 2: Add 25g of pretreated konjac glucomannan, 6g of inulin, 23g of methyl acrylate, 8g of styrene, 0.05g of ammonium persulfate, 120g of water, and 40g of acetone into the supercritical reaction device in step 2, and stir evenly , then seal the system, feed carbon dioxide to 25MPa, and react under the conditions of 60°C for 2 hours, then release the pressure of carbon dioxide, add 0.02g of ammonium persulfate, 8g of vinyl acetat...

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Abstract

The invention discloses a preparation method of a thermoplastic konjac glucomannan nanocomposite material. The method comprises the following steps of (1) preparing konjac glucomannan to be pretreated; (2) performing grafting with vinyl monomers to prepare thermoplastic konjac glucomannan; (3) uniformly mixing the thermoplastic konjac glucomannan and a nanometer graphene oxide solution, and performing drying to obtain a mixture; (4) stirring and mixing the mixture, a cross-linking agent and a plasticizer in a mixing machine, and performing drying to obtain a blended material; (5) putting the blended material into a double-screw extruder; performing melt blending and extrusion pelletization,so as to obtain the thermoplastic konjac glucomannan nanocomposite material. The thermoplastic konjac glucomannan nanocomposite material is a novel composite material, and has excellent adsorbability, thermostability and mechanical toughness; the comprehensive performance is excellent; biodegradation and regeneration are realized; the environment-friendly effect is achieved; no environment pollution exists; the processing performance in the extrusion molding, blow molding, injection molding and foaming process is good; the thermoplastic konjac glucomannan nanocomposite material can be widely applied to the fields of chemical engineering, medicine, environment protection, machine building and the like.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a thermoplastic konjac glucomannan nanocomposite material. Background technique [0002] The advent and rapid development of synthetic polymer materials in the 20th century has greatly improved human life. Synthetic polymer materials have been listed as the four pillars of the material field along with steel, wood and cement. However, with the increasing depletion of resources such as oil and coal, the main raw materials of polymer chemical industry, and the increasing environmental pollution caused by waste of traditional non-degradable polymer materials, it directly threatens the sustainable development of human beings. In order to achieve the sustainable development of the world economy, one of the relevant research frontiers at home and abroad is to use clean production technology to modify renewable biological resources into environmenta...

Claims

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Application Information

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IPC IPC(8): C08L51/02C08K3/04C08F251/00C08F220/14C08F212/08C08F218/08C08F226/06
CPCC08F251/00C08K3/04C08K2201/011C08L2201/06C08L2201/08C08L51/02C08F220/14C08F212/08C08F218/08C08F226/06
Inventor 竹文坤陆爱霞龙晓燕周建罗勇杨小艳王茂
Owner SICHUAN BIOTECH FORCE TECH
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