Modified stalk material and its application

A technology of straw and steam-exploded straw, which is applied in the fields of flexible covering, fiber raw material processing, cellulose raw material pulping, etc., can solve the problem that lignin adhesion cannot be used, the performance of cellulose has not been improved, and there is no industrial production and other problems, to achieve the effect of saving glue mixing process and equipment, improving strength and reducing production cost

Inactive Publication Date: 2003-04-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing literature report on this aspect is: simply heat-treat the straw first, in the heat-curing process, only the hydrolyzed sugar solution can be used, and the adhesion of lignin cannot be used, and the cellulose properties have not been improved. Therefore, The cost of producing synthetics is high, the performance is unstable, and there is no industrial production so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0024] Put the air-dried straw roughly cut to 20-30mm long into the steam explosion tank, feed high-pressure steam, maintain it under the pressure condition of 1.5Mpa for 12 minutes, release the instant decompression to get the steam explosion straw. Directly inoculate the lignin-degrading bacteria Phanerochaete chrysosporium seed liquid, the dosage is 4wt% of the weight of the steam-exploded rice straw; directly carry out solid-state fermentation on the steam-exploded rice straw, and ferment at normal temperature for 3 days. Carry out thermal curing and drying of the above-mentioned treated straw, control the water content of the material to about 20wt%, put it into a fiberboard mold, press at a pressure of 1.5-1.8Mpa, a temperature of 150--170°C, and hot-press for 5--10 minutes That is to prepare a clean green fiberboard with denatured straw as material. The strength and physical properties of the prepared fiberboard have reached the first-class national standard for medium ...

Embodiment 3

[0025] Air-dried corn stalks roughly cut to a length of about 20 mm are put into a steam explosion tank, introduced with high-pressure steam, maintained at a pressure of 1.0 Mpa for 3 minutes, and instantly decompressed and released to obtain steam-exploded corn stalks. Directly inoculate the lignin-degrading bacteria Phanerochaete chrysosporium seed liquid, the dosage is 2wt% of the weight of steam-exploded materials; directly perform solid-state fermentation on steam-exploded corn stalks, and ferment at normal temperature for 5 days. The stalks treated above are mixed with the air-dried corn stalks, and the weight ratio of the steam-exploded straws to the air-dried corn stalks is 1:2. A conventional thermosetting drying method is adopted to control the water content of the mixture to 25 wt%. Choose different packaging molds, put the mixture into the mold, and press at a pressure of 1.5Mpa and a temperature of 160°C for 30 minutes to prepare a clean and green inner packaging ...

Embodiment 4

[0026]Put the air-dried straw roughly cut to 20 mm in length into a steam explosion tank, feed high-pressure steam, maintain it under the pressure condition of 1.7Mpa for 10 minutes, and release the instant decompression to obtain the steam explosion straw. Directly inoculate the lignin-degrading bacteria Phanerochaete chrysosporium seed liquid, the dosage is 8wt% of the weight of the steam-exploded material; directly perform solid-state fermentation on the steam-exploded rice straw, and ferment at normal temperature for 4 days. Using the conventional thermal curing drying method, the water content of the mixture is controlled to be 10wt%, and different cutlery box molds are selected, loaded into the mold, and the denatured rice straw is prepared by hot pressing for 15 minutes at a pressure of 1.2Mpa and a temperature of 120°C. Material disposable cutlery box. Clean the edge of the hot-pressed semi-finished product, put it in the gel waterproof agent for 1-2 minutes, take it o...

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Abstract

The present invention relates to a modified straw material, its production method and application. The production method of the modified straw material includes the following steps: 1. steam-blastingstraw to obtain steam-blasted straw; 2. inoculating the steam-blasted straw with culture liquor to make solid fermentation treatment to degrade lignin; 3. mixing the steam-blasted straw and air-driedstraw, making their mixture undergo the processes of thermosetting treatment and forming treatment so as to obtain the invented modified straw material which can be made into plate material or light packaging material instead of wood material, so that it possesses extensive application.

Description

technical field [0001] The invention belongs to the field of plates or packaging materials, and in particular relates to denatured straw materials using crop straws as raw materials and uses thereof. Background technique [0002] The building materials industry is one of the industries that consume the most resources, destroy the land the most, and pollute the environment the most. According to statistics, the country spends 150 billion yuan on decorative materials every year. In order to speed up urban construction and meet the needs of the building materials market, the country has to cut down a large number of trees every year. This is especially true for our country with low forest coverage. To add insult to injury. [0003] With the development of the economy, the advancement of science and technology and the continuous improvement of people's living standards, the amount of plastic products is increasing day by day. More than 100 million tons o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/46C12N1/22C12S3/04D21C3/00
Inventor 陈洪章李佐虎
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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