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Method for preparing adhesive on basis of alfalfa meal

A kind of technology of alfalfa grass powder and production method, which is applied in the direction of adhesive, epoxy glue, adhesive type, etc., can solve the problems of complex lignin structure, water resistance, short storage period, etc., achieve simple production process and reduce use volume, increase the effect of added value

Inactive Publication Date: 2014-12-24
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the drying speed of starch adhesive is slow, not water-resistant, the gelatinized liquid is easy to retrograde, and the storage period is short; the lignin adhesive is still in the experimental stage, the lignin structure is complex, the macromolecular structure is uneven, and it is difficult to degrade; Soy protein adhesives have relatively poor bonding strength and water resistance, low resistance to microbial degradation, and consume food, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh a certain amount of 160 mesh alfalfa stem meal and place it in a container, according to the mass ratio of alfalfa stem meal: sodium chloride=100:2, weigh out sodium chloride, and mix it evenly with the alfalfa stem meal;

[0023] (2) According to the mass ratio of alfalfa stem meal: water=1:25, weigh the tap water, add the tap water to the container of step (1), soak for 25h, and then filter with suction;

[0024] (3) Collect the filtrate and adjust the pH of the filtrate to 3 with hydrochloric acid, then quickly move it to a water bath at a set temperature for flocculation at 80°C for 8 minutes, and then quickly cool it to room temperature with cold water;

[0025] (4) After standing for 60 minutes, suction and filter again to obtain a paste product, which is vacuum dried and dried;

[0026] (5) Weigh 7g of WSR-618 epoxy resin and 2g of acetone into a three-necked flask, mix them evenly, and then add 100g of the dry paste product obtained in step (4) and 1500ml of ta...

Embodiment 2

[0030] (1) Weigh a certain amount of 120-mesh alfalfa leaf powder and place it in a container. According to the mass ratio of alfalfa leaf powder: sodium chloride=100:1.5, weigh sodium chloride and mix it with the alfalfa leaf powder evenly;

[0031] (2) According to the mass ratio of alfalfa leaf powder: water = 1:20, weigh the tap water, add the tap water to the container of step (1), soak for 20 hours, and then filter with suction;

[0032] (3) Collect the filtrate and adjust the pH of the filtrate to 2.5 with hydrochloric acid, then quickly move it to a water bath at a set temperature for flocculation at 70°C for 6 minutes, and then quickly cool it to room temperature with cold water;

[0033] (4) After standing for 40 minutes, suction and filter again to obtain a paste product, which is vacuum dried and dried;

[0034] (5) Weigh 6g of WSR-6101 epoxy resin and 1g of acetone into a three-necked flask, mix them evenly, and then add 100g of the dry paste product obtained in step (4) a...

Embodiment 3

[0038] (1) Weigh a certain amount of 200 mesh alfalfa stem meal and place it in a container, according to the mass ratio of alfalfa stem meal: sodium chloride=100:2.5, weigh sodium chloride, and mix it evenly with the alfalfa stem meal;

[0039] (2) According to the mass ratio of alfalfa stem meal: water = 1:30, weigh the tap water, add the tap water to the container of step (1), soak for 30 hours, and then filter with suction;

[0040] (3) Collect the filtrate and adjust the pH of the filtrate to 3.5 with hydrochloric acid, then quickly move it to a water bath at a set temperature for flocculation at 90°C for 10 minutes, and then quickly cool it to room temperature with cold water;

[0041] (4) After standing for 80 minutes, suction and filter again to obtain a paste product, which is vacuum dried and dried;

[0042] (5) Weigh 8g of WSR-6690 epoxy resin and 3g of acetone in a three-necked flask, mix them evenly, and then add 100g of the dry paste product obtained in step (4) and 1600m...

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Abstract

The invention discloses a method for preparing an adhesive on basis of alfalfa meal. According to the method, powder of stems or leaves of renewable alfalfa with wide planting area and high yield is taken as a raw material, water is taken as a solvent, the powder and water are treated by sodium chloride and hydrochloric acid and have a mixed reaction with epoxy resin under the acetone environment, and the environment-friendly adhesive is prepared; and the obtained adhesive has excellent bonding strength, more water is used as the solvent, so that the cost of the adhesive is lower, a highly processed product of alfalfa meal with an industrialization value is obtained, and the additional value of alfalfa meal is improved. The adhesive is environment-friendly and hygienic in the use process, cannot produce poisonous and harmful matters such as formaldehyde, phenol and the like and can be applied to the field of plywood, particle boards, fiberboard and the like.

Description

Technical field [0001] The invention relates to a manufacturing method of an alfalfa adhesive, in particular to a manufacturing method of an adhesive based on alfalfa grass powder. The adhesive is mainly used in wood plywood production and furniture manufacturing, and belongs to the technical field of wood adhesives. technical background [0002] At present, most of the plywood industry at home and abroad uses the trialdehyde (phenolic, urea-formaldehyde, melamine formaldehyde) glue prepared from the added value products of the petrochemical industry as the adhesive, but the plywood prepared by the trialdehyde glue can release to the body and Formaldehyde is a toxic and harmful gas in the environment. Therefore, in recent years, people have paid more and more attention to the research and invention of new adhesives to replace trialdehyde in the wood industry. Polyurethane adhesive is one of the most researched adhesives at present, but due to its high cost, it is not suitable for...

Claims

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Application Information

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IPC IPC(8): C09J197/02C09J163/00
Inventor 雷文刘芹景露高小超单周楠于海宁朱娴
Owner NANJING FORESTRY UNIV
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