Preparation method of high-viscosity transparent starch adhesive

A starch adhesive and transparent technology, used in starch adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor performance, poor thermal stability of PPC, poor mechanical properties, etc. , to achieve the effect of strong adhesive strength and good mechanical properties

Active Publication Date: 2021-04-13
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PPC has poor thermal stability and poor mechanical properties. Some methods are used to modify it to improve poor performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 50g of polyvinyl alcohol into 1000ml of deionized water, heat at 95°C and stir until completely melted; weigh 200g of starch and dissolve it in 200ml of deionized water, then add it to the polyvinyl alcohol solution, and then add 5g of sodium persulfate initiator , 60°C water bath, stirring at 300 r / min for 1 hour; add 200ml of 10% sodium hydroxide solution and continue to stir for 30 minutes; weigh 20g of polypropylene carbonate and add 8ml of ethylene glycol, and continue to stir until it is completely alcoholized; Add the propylene carbonate solution into the starch solution, and keep stirring in a water bath at 65°C for 30 minutes; add 5g of montmorillonite and keep stirring to obtain a transparent and uniform starch adhesive.

Embodiment 2

[0023] Weigh 60g of polyvinyl alcohol into 1000ml of deionized water, heat at 95°C and stir until completely melted; weigh 150g of starch and dissolve it in 200ml of deionized water, then add it to the polyvinyl alcohol solution, and then add 8g of sodium persulfate initiator , 55°C water bath, stirring at 300 r / min for 1 hour; add 180ml of 10% sodium hydroxide solution and continue to stir for 30 minutes; weigh 50g of polypropylene carbonate and add 20ml of ethylene glycol, and continue to stir until it is completely alcoholized; Add the propylene carbonate solution into the starch solution, and keep stirring in a 65°C water bath for 30 minutes; add 8g of montmorillonite and keep stirring, to obtain a transparent and uniform starch adhesive.

Embodiment 3

[0025] Weigh 80g of polyvinyl alcohol into 1000ml of deionized water, heat at 95°C and stir until completely melted; weigh 200g of starch and dissolve it in 200ml of deionized water, then add it into the polyvinyl alcohol solution, and then add 10g of sodium persulfate initiator , in a water bath at 65°C, stirring at 300 r / min for 1 hour; adding 240ml of 10% sodium hydroxide solution and continuing to stir for 30 minutes; weighing 30g of polypropylene carbonate and adding 10ml of ethylene glycol, and continuously stirring until complete alcoholization; Add the propylene carbonate solution into the starch solution, and keep stirring in a water bath at 65°C for 30 minutes; add 4g of montmorillonite and keep stirring to obtain a transparent and uniform starch adhesive.

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PUM

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Abstract

The invention discloses a preparation method of a high-viscosity transparent starch adhesive, which comprises the following steps: modifying starch by using a heated and molten polyvinyl alcohol solution, adding an initiator, gelatinizing by using sodium hydroxide, alcoholizing polypropylene carbonate, proportionally blending, and finally adding a small amount of montmorillonite to prepare the starch adhesive. The high-viscosity transparent adhesive prepared by the method disclosed by the invention has very strong adhesive strength, water resistance and film-forming property, has good mechanical properties, is non-toxic and environment-friendly, has degradable materials, and does not pollute the environment. The high-viscosity transparent adhesive can be widely applied to the fields of wood, plastic, paper, packaging and the like.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a method for preparing starch adhesives. Background technique [0002] With the development of technology, adhesives have been widely used in various industries. Traditional adhesives are mainly based on organic solvents and resins, which will produce harmful volatile gases during the production process, etc., so they are gradually replaced by water-based adhesives, but the main components are still various resins and emulsions. , is non-renewable, and is not resistant to high temperature and high humidity, the effect is poor, and it does not fully meet the concept of green environmental protection, so there is an urgent need for a completely green and environmentally friendly adhesive. Natural plant starch molecules contain a large number of hydrogen bonds, which have the conditions to become adhesives, and have a wide range of sources, low prices, renewable, non-toxic, and n...

Claims

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Application Information

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IPC IPC(8): C09J103/02C09J129/04C09J169/00C09J11/08C09J11/04
CPCC09J103/02C09J11/08C09J11/04C08L2201/10C08L2205/03C08K2201/011C08L29/04C08L69/00C08K3/346
Inventor 罗文翰刘庭源刘佳仪肖乃玉钟乐
Owner ZHONGKAI UNIV OF AGRI & ENG
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