Raw material prescription for xylogen-inorganic nano composite material producing process thereof

A technology for inorganic nanomaterials and composite materials, which is applied in the field of raw material formulation and preparation of lignin-inorganic nanocomposite materials, can solve the problems of reduced chemical activity, high impurity content, structural changes, etc., and achieves high purity, simple process method, The effect of improving performance

Active Publication Date: 2008-05-07
FUZHOU UNIV
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Problems solved by technology

[0003]In previous research reports on the preparation of lignin-inorganic nanocomposites, it was extracted from traditional papermaking "black liquor", not only the content of impurities is high, but also Natural lignin in plant raw materials undergoes major structural changes after cooking with alkali and sulfite, and its chemical activity is significantly reduced. The preparation process uses expensive silane coupling agents for surface treatment of nano-inorganic materials

Method used

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preparation example Construction

[0024] The concrete steps of preparation method of the present invention are:

[0025] (1) Inorganic nanomaterial pretreatment: Add 1-80 parts by weight of inorganic nanomaterials to the aqueous solution prepared by 0.1-10 parts of water-soluble lignin surface treatment agent, stir to mix evenly, and stand still for 10-30min Standby, you can also add 0-5 parts of other types of surface treatment agents on this basis, continue to stir to make it evenly mixed, and let it stand for 10-30min for later use;

[0026] (2) Dissolving 5-95 parts by weight of lignin or its derivatives in an alkaline aqueous solution, stirring and heating to make it completely dissolved, then adding the above-mentioned surface-treated inorganic nanomaterials, while stirring or ultrasonic Shake for 15 minutes, then add dilute sulfuric acid or dilute hydrochloric acid, neutralize to PH = 3, age in a constant temperature water bath at 70°C for 1 hour, filter, wash, and dry to prepare a lignin-inorganic nano...

Embodiment 1

[0029] 5 g of nano-SiO 2 Add 25 milliliters of concentrations of 5% high-boiling alcohol lignin-acrylamide graft copolymer solution, stir to make it mix evenly, and then 20 grams of high-boiling alcohol lignin (using 1,4 butanediol as a solvent with high boiling alcohol) The lignin obtained by alcohol solvent extraction) is dissolved in 180 milliliters of 15% ammonia solution and stirred until dissolved, adding the above-mentioned pretreated nano-SiO 2 , stirred and ultrasonically oscillated for 15 minutes, added 20% dilute sulfuric acid to neutralize to PH = 3, aged in a constant temperature water bath at 70°C for 1 hour, filtered, washed, and dried to obtain 22.8 grams of composite material.

Embodiment 2

[0031] 5 g nanometer TiO 2 Add to 20 milliliters of high-boiling alcohol lignin sulfonic acid solution of concentration 5%, stir to make it mix evenly, then 15 grams of high-boiling alcohol lignin (using 1,4 butanediol as solvent to extract with high-boiling alcohol solvent method) Obtained lignin) is dissolved in 120 milliliters of 3% sodium hydroxide solution and is stirred to dissolving, adds above-mentioned pretreated nanometer TiO 2 . Perform ultrasonic oscillation for 20 minutes, add 20% dilute sulfuric acid to neutralize to pH=3, age in a constant temperature water bath at 70°C for 1 hour, filter, wash, and dry to obtain 17.6 grams of composite material.

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Abstract

The invention provides a raw material prescription of lignin-inorganic nanometer composite material and the preparation method thereof. The composite material comprises lignin or derivate, inorganic nm material, water soluble lignin surface finishing agent and other types of surface finishing agent. The preparation method comprises the steps as follows: the inorganic nanometer material is pretreated with the water soluble lignin surface finishing agent, the other types of the surface finishing agent are added to finish pretreatment; the inorganic nanometer material is added into the lignin or the derivate, acid is added for sediment, and is filtered and dried to acquire the lignin-inorganic nm composite material. The invention has simple raw materials prescription, easily-available sources, low cost and simple technique, is favorable for the recirculation and the reuse of biographic resources, and has good product performance, brilliant economical benefit and wide application prospect without pollution.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of biomass resources and manufacture of polymer materials, and more specifically relates to a raw material formula and preparation method of a lignin-inorganic nanocomposite material. Background technique [0002] Inorganic nanomaterials are widely used in various fields, and one of their important uses is as a modification additive for polymer materials. Inorganic nanomaterials can improve their toughness, wear resistance and aging resistance. However, since inorganic nanoparticles are hydrophilic and have different surface properties from polymer materials, they have poor compatibility when combined with organic polymers, and are difficult to mix and disperse. Lignin has excellent structural properties. As a reinforcing agent, filler, and antioxidant for polymer materials, it can improve the mechanical properties and thermal stability of polymers. The lignin-inorganic nanocomposite mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/00C08K5/56C08J3/21C08K5/54C08K3/34
Inventor 程贤甦陈云平
Owner FUZHOU UNIV
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