Biomass plate and preparation method thereof

A biomass material and biomass technology, applied in the field of nanometers, can solve problems such as environmental pollution, health risks, and environmental pollution

Active Publication Date: 2020-11-17
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These resin adhesives cause environmental pollution during the production process, and continuously release toxic and volatile substances such as formaldehyde during the use of wood-based panels, causing environmental pollution and serious health risks

Method used

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  • Biomass plate and preparation method thereof
  • Biomass plate and preparation method thereof
  • Biomass plate and preparation method thereof

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Experimental program
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preparation example Construction

[0068] 2) Preparation method of high-performance and environmentally friendly biomass panels

[0069] A second aspect of the present disclosure provides a method for preparing the biomass-friendly board, the method comprising the following steps:

[0070] A) making the cellulose-containing biomass material with surface nanocrystallization and a certain amount of metal ion cross-linking agent into a raw material with a water content mass fraction of 10% to 90%;

[0071] B) The raw material is processed into a plate through drying and molding processes such as compression, extrusion, vacuuming, etc., without adding a polymer binder, to remove moisture.

[0072] In the present invention, the metal ion is selected from lithium ion, sodium ion, potassium ion, calcium ion, magnesium ion, strontium ion, copper ion, nickel ion, sub-cobalt ion, zinc ion, iron ion, chromium ion, cobalt ion , one or more of aluminum ions and scandium ions. Preferably, calcium ions. The added amount of...

preparation example 1

[0116] A) Soak 500 g of pine wood chips with a particle size of 200 mesh in 5 L of 10% sodium hydroxide solution at 80° C. for 24 hours (h);

[0117] B) Clean the surface of the treated wood chips with alkaline solution, soak them in a pH=6.8 solution containing 0.1 mg / mL 2,2,6,6-tetramethylpiperidine-nitrogen-oxide and 1% sodium chlorite In the oxidation solution, at 60°C, oxidize for 24 hours;

[0118] C) Mechanically agitate the biomass particles after surface oxidation, specifically a German IKA RW20 agitator with a rotating speed of 500 rpm and a stirring time of 2 hours;

[0119] D) Dispersing the mechanically treated biomass particles in an aqueous solution for preservation. Such as figure 1 As shown, the obtained product is a uniformly dispersed slurry without sedimentation, while the wood chips without surface nanocrystallization treatment directly undergo sedimentation.

[0120] After nanocrystallization treatment, a large amount of nanocellulose is produced on th...

preparation example 2

[0126] A) Soak 500 g of rape straw powder in 5 L of 10% sodium hydroxide solution at 80° C. for 24 h;

[0127] B) Clean the surface of the treated wood chips with alkaline solution, soak them in a pH=6.8 solution containing 0.1 mg / mL 2,2,6,6-tetramethylpiperidine-nitrogen-oxide and 1% sodium chlorite In the oxidation solution, at 60°C, oxidize for 24 hours;

[0128] C) The biomass particles after surface oxidation are mechanically ball milled, and the ball milling condition is to put an aqueous solution with a wood chip content of 15% in a 250 ml ball mill tank, put it into a planetary ball mill, set the speed at 27, and mill for 8 hours;

[0129] D) Freeze-drying the mechanically treated biomass particles into dry powder for storage.

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Abstract

The invention provides a biomass plate and a preparation method thereof. The biomass sheet comprises a surface nanocrystallized cellulose-containing biomass material and one or more metal ions, and optionally no polymer binder, and is obtained by a sheet forming process from a feedstock comprising the surface nanocrystallized cellulose-containing biomass material, optionally without the addition of a polymer binder. In the preparation process of the biomass plate, high mechanical strength can be achieved through self-crosslinking molding without adding a polymer binder. The forming process isselected from common compression forming processes such as hot pressing, natural evaporation drying forming and the like. The obtained high-performance environment-friendly biomass plate has the characteristics that the production process is environmentally friendly, the product is high in strength and modulus, no harmful volatile gas is released in the whole using process, and the like, and the raw materials are all biomass raw materials and can be naturally degraded.

Description

[0001] This application claims priority to Chinese patent application 201910401182.6 filed on May 14, 2019, and the entire content of this Chinese patent application 201910401182.6 is incorporated herein by reference. technical field [0002] The invention relates to the field of nanotechnology, in particular to a biomass plate and a preparation method thereof. Background technique [0003] In the current particleboard manufacturing process, wood or other lignocellulosic materials are first made into particle particles, and then adhesives are applied and then glued into wood-based panels under the action of heat and pressure, also known as particleboard. According to relevant statistics, our current annual production of particleboard has exceeded 26 million cubic meters, with a huge market size. [0004] However, in the current particleboard processing technology, in order to enable the scrap particles made of wood or other lignocellulosic materials to be glued into shape, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B15/04C09D101/04
CPCC08B15/04C09D101/04Y02P20/10C08B1/00
Inventor 俞书宏管庆方韩子盟杨怀斌凌张弛
Owner UNIV OF SCI & TECH OF CHINA
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