Reinforced and toughened plant fiber-melamine resin composite material and preparation method thereof

A plant fiber and melamine resin technology, which is applied in plant fiber, fiber treatment, textiles and paper making, etc., can solve the problems of affecting the service life of materials, the brittleness of melamine resin, and the surface is prone to cracking, etc., so as to improve durability, Not easy to crack, excellent toughness effect

Active Publication Date: 2020-08-28
安徽绿之态秸秆制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to too many crosslinking points of melamine, the brittleness of the melamine resin is relatively large, so that the obtained plant fiber-melamine resin composite material still has the defect of insufficient toughness, and its surface is prone to cracking, which seriously affects the quality of the material. service life

Method used

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  • Reinforced and toughened plant fiber-melamine resin composite material and preparation method thereof

Examples

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preparation example Construction

[0029] The preparation method of melamine formaldehyde resin is:

[0030] Add 100 parts by weight of formaldehyde solution with a concentration of 37% into the reactor, adjust the pH to 9.3 with NaOH solution, then raise the temperature to 35°C and stir for 0.5h until the pH is stable, then add 30 parts by weight of melamine and react at 90°C for 2h, Instantly.

[0031] The preparation method of carboxylated nanocellulose is:

[0032] Heat and hydrolyze the cotton pulp fiber in a sulfuric acid solution with a mass fraction of 65% at 50°C for 1 hour, wherein the weight ratio of the cotton pulp fiber to the sulfuric acid solution is 1:10, and dilute the suspension to more than 8 times with deionized water after cooling Terminate the reaction, then centrifuge, wash, place in a dialysis bag and dialyze until the pH remains constant, and finally take it out and freeze-dry to obtain the final product.

Embodiment 1

[0035] A kind of reinforced and toughened plant fiber-melamine resin composite material, comprising the following raw materials in parts by weight:

[0036] 50 parts of melamine formaldehyde resin, 35 parts of modified plant fiber, 1 part of mica powder, 0.05 part of sulfamic acid amine, and 0.5 part of pentaerythritol stearate.

[0037] Wherein, the preparation method of modified plant fiber comprises the following steps:

[0038] S1. Add 100-mesh plant fibers into a sodium periodate solution with a concentration of 0.04mol / L, and stir and react for 6 hours at 30°C and a pH of 3.5 to obtain aldylated plant fibers, wherein the plant fibers and sodium periodate The weight ratio of the solution is 1:100;

[0039] S2. Dip the aldehyde-based plant fiber described in step S1 into the surface modification solution, soak it at 25°C for 2h, take it out and dry it at 50°C for 0.5h, and the surface modification solution has a solid content of 50%. Carboxylated styrene-butadiene latex,...

Embodiment 2

[0044] A kind of reinforced and toughened plant fiber-melamine resin composite material, comprising the following raw materials in parts by weight:

[0045] 60 parts of melamine formaldehyde resin, 45 parts of modified plant fiber, 3 parts of mica powder, 0.1 part of sulfamic acid amine, and 1 part of pentaerythritol stearate.

[0046] Wherein, the preparation method of modified plant fiber comprises the following steps:

[0047] S1. Add 400-mesh plant fibers into a sodium periodate solution with a concentration of 0.06mol / L, and stir and react for 10 hours at 60°C and a pH of 5.5 to obtain aldylated plant fibers, wherein the plant fibers and sodium periodate The weight ratio of the solution is 2:100;

[0048] S2. Immerse the aldehydated plant fiber described in step S1 in the surface modification solution, soak it at 45°C for 4 hours, take it out and dry it at 70°C for 1 hour, and the surface modification solution consists of 55% solid content Carboxylated styrene-butadiene...

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Abstract

The invention discloses a reinforced and toughened plant fiber-melamine resin composite material and a preparation method thereof. The reinforced and toughened plant fiber-melamine resin composite material is prepared from the following raw materials in parts by weight: 50 to 60 parts of melamino-formaldehyde resin, 35 to 45 parts of modified plant fiber, 1 to 3 parts of mineral filler, 0.05 to 0.1 part of curing agent and 0.5 to 1 part of lubricating agent. By optimizing a plant fiber filling system, the prepared plant fiber-melamine resin composite material has excellent bending property, impact toughness and mechanical property, and the durability of a plant fiber-melamine resin product can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of melamine resin materials, in particular to a reinforced and toughened plant fiber-melamine resin composite material and a preparation method thereof. Background technique [0002] Melamine resin, also known as melamine-formaldehyde resin, is a polymer obtained by the reaction of melamine and formaldehyde. It undergoes a cross-linking reaction during processing and molding, and finally forms a high polymer with a three-dimensional network structure. Melamine resin not only has rich colors and looks like porcelain, but also has excellent characteristics such as transparency, non-toxic and tasteless, high mechanical strength, bump resistance, good chemical resistance, corrosion resistance, high temperature resistance, low temperature resistance, and boiling water resistance. The plant fiber filler is blended, and the high strength of the plant fiber and the cohesiveness of the melamine resin itself are used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/28C08L97/02C08K3/34C08K3/26C08K3/36C08J5/06C08J3/24D06M15/693D06M15/09D06M11/50D06M101/04
CPCC08J5/06C08J3/246D06M15/693D06M15/09D06M11/50C08J2361/28C08J2497/02C08K3/34C08K2003/265C08K3/36D06M2101/04
Inventor 刘海林崔巍赵原刘和文
Owner 安徽绿之态秸秆制品有限公司
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