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Method for manufacturing methyl malei-eleostearate anhydride modified wood fiber

A technology of methyl tungalic anhydride and wood fiber, which is applied in fiber treatment, plant fiber, textiles and papermaking, etc., can solve the problems of few application reports, achieve abundant and cheap resources, enhance interface compatibility, and surface polarity Reduced effect

Inactive Publication Date: 2011-10-05
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these modifying agents are all derived from petrochemical products, and most of them are used in fiber-reinforced thermoplastic matrix resin composites, while there are few reports on the application of thermosetting resin composites.

Method used

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  • Method for manufacturing methyl malei-eleostearate anhydride modified wood fiber
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  • Method for manufacturing methyl malei-eleostearate anhydride modified wood fiber

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preparation example Construction

[0027] The invention provides a method for preparing surface modified fibers. Methyl tungalic anhydride, a deep-processed product of natural vegetable oil tung oil, is used as a modifying agent to react with hydroxyl groups on the surface of wood fibers to produce methyl tungalic anhydride modified wood fibers. The surface polarity of the modified wood fiber manufactured by the method is reduced, and the surface hydrophobicity is improved, thereby enhancing the interfacial compatibility with the synthetic resin.

[0028] The used tungalic anhydride methyl ester is obtained by the addition reaction of tungalic acid methyl ester and maleic anhydride generated by the reaction of tung oil and excess methanol under the action of a catalyst. For the specific preparation method, refer to the tungalic acid methyl ester and di Elemental acid anhydride addition reaction method.

Embodiment 1

[0030] In a four-necked bottle equipped with a thermometer, a stirrer, and a condenser tube, add 2 parts by mass of wood fiber, 20 mL / (g poplar wood powder quality) dimethylformamide, 15 parts by mass of tungalic anhydride methyl ester respectively, at room temperature ( 25°C) after mixing, add 0.1 parts by mass of catalyst pyridine, and react at constant temperature for 6 hours; then the modified wood fiber is separated by suction filtration, and then extracted in Soxhlet with a mixed solvent (toluene:acetone:absolute ethanol volume ratio 4:1:1) Extracted in a device for 16 hours to remove unreacted small molecular compounds, and then dried in an oven at 105±2°C for 16 hours, and the weight gain of the obtained wood fiber was 3.6%.

Embodiment 2

[0032] In a four-necked bottle equipped with a thermometer, a stirrer, and a condenser tube, add 2 parts by mass of wood fiber, 20 mL / (g poplar wood powder mass) dimethylformamide, and 15 parts by mass of methyl tungalic anhydride, and mix at room temperature After heating to 60°C, add 0.1 parts by mass of pyridine as a catalyst, and continue the reaction at 60°C for 6 hours. Then cool down to room temperature, separate the modified wood fiber by suction filtration, and extract in a Soxhlet extractor for 16 hours with a mixed solvent (toluene:acetone:absolute ethanol volume ratio 4:1:1) to remove unreacted small molecule compounds , and then dried in an oven at 105±2°C for 16 hours, the weight gain percentage of the obtained wood fiber mass was 12.8%.

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Abstract

The invention discloses a method for manufacturing methyl malei-eleostearate anhydride modified wood fiber by virtue of reaction of wood fiber and methyl malei-eleostearate anhydride. The method comprises the following steps of: firstly, with dimethyl formamide as solvent, carrying out reaction on the wood fiber and methyl malei-eleostearate anhydride at the temperature of 25-130 DEG C for 2-12 hours, wherein the dosage of dimethyl formamide is 20ml per g of the wood fiber, and the dosage of methyl malei-eleostearate anhydride is 2.5-15 times that of the wood fiber; and secondly, extracting reaction products with mixed solvent for 16 hours, removing unreacted small molecular compound, and baking, thus the methyl malei-eleostearate anhydride modified wood fiber is obtained. Catalyst pyridine is added in the first step preferably. The method disclosed by the invention has the advantages of being rich in resources, being low in cost and being environmentally-friendly. The surface polarity of the modified wood fiber manufactured by adopting the method disclosed by the invention is reduced, and the surface hydrophobicity is improved, thus the interface compatibility with synthetic resin is enhanced.

Description

technical field [0001] The present invention relates to a method for manufacturing surface chemically modified wood fibers, in particular to a modifier that replaces fossil sources with tungalic anhydride methyl ester derived from biomass renewable natural tung oil resources, and reacts with wood fiber surface hydroxyl groups A method for producing tungalic anhydride methyl ester modified wood fiber. Background technique [0002] Environment-friendly composites can be prepared by using renewable natural fibers as reinforcements. Chinese patent CN1200128A discloses a preparation method of surface-modified cellulose fiber and its use as a filler in composite materials; CN1651518A discloses a preparation method of bamboo fiber, bamboo powder, and wood fiber resin-based composite materials; world patent WO9310172 discloses The use of natural cellulose fiber as a thermosetting resin reinforcing filler; European patent EP0200409A2 discloses the use of bacterial cellulose fiber de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06D06M101/04D06M13/224
Inventor 孔振武陈健吴国民霍淑平
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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