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Aminated modified lignin-based polyurethane foam, and preparation method and application thereof

A technology of polyurethane foam and aminated lignin, which is applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of poor lipophilicity and hydrophobicity, poor adsorption effect of oil substances, etc., achieve high adsorption and improve hydrophobicity lipophilic effect

Pending Publication Date: 2022-02-01
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages and deficiencies of existing polyurethane foams such as poor lipophilicity and hydrophobicity and poor adsorption effect on oily substances with high viscosity, and provide a method for preparing aminated modified lignin-based polyurethane foam, which comprises lignin Amination treatment grafts saturated long carbon chains, replaces part of polyether polyols, and reacts with isocyanates to generate aminated modified lignin-based polyurethane foams, which improves the lipophilic and hydrophobic properties of polyurethane foams, and significantly improves its viscosity (40 The viscosity at ℃ is 95mm 2 / s) adsorption effect of oil substances

Method used

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  • Aminated modified lignin-based polyurethane foam, and preparation method and application thereof
  • Aminated modified lignin-based polyurethane foam, and preparation method and application thereof
  • Aminated modified lignin-based polyurethane foam, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0032] A preparation method of aminated modified lignin-based polyurethane foam, comprising the following steps:

[0033] S1. Weigh 10g of lignin into a 250mL beaker, add 200mL of ultrapure water, adjust the pH of the lignin solution to 8 with sodium hydroxide, add the lignin solution into a 250mL three-necked flask, and stir at 50°C for 30min to make the lignin solution The element is fully dissolved, and then the temperature is raised to 90 ° C, and 2 g of formaldehyde solution is added dropwise. After 10 minutes of reaction, 2 g (20%) of hexadecylamine is added and kept for 4 hours. After the reaction is completed, the reaction solution is added to 1000 mL of 90 ℃ hot water, adjust pH = 2, stand overnight and then filter with suction, and continuously add water to wash until the filtrate is neutral, place the solid at 40 ℃ and vacuum dry to constant weight to obtain aminated modified wood white;

[0034] S2. Weigh 20g of PEG400, 0.1g of dibutyltin dilaurate, 0.1g of A33 (t...

Embodiment 2

[0036] The amount of cetylamine added in step S1 of Example 2 is 15% (1.5 g) of the lignin mass, and the others are the same as in Example 1.

Embodiment 3

[0037] The amount of cetylamine added in step S1 of Example 3 is 25% (2.5 g) of the lignin mass, and the others are the same as in Example 1.

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Abstract

The invention discloses an aminated modified lignin-based polyurethane foam, and a preparation method and application thereof. The preparation method comprises the following steps: firstly, adding formaldehyde and an amination reagent into a lignin solution for amination treatment, then adjusting the pH value of the solution to 2-3, standing, precipitating and drying to obtain aminated lignin; and then, uniformly mixing the aminated lignin with polyether polyol, a surfactant, a catalyst and a foaming agent, and adding isocyanate for reaction to form the aminated modified lignin-based polyurethane foam, wherein the temperature of the amination reaction is 70-100 DEG C, and the reaction time is 2-6 hours; and the addition amount of the amination reagent is 15-25% of the mass of the lignin. The prepared aminated modified lignin-based polyurethane foam can be used for adsorbing and separating oil substances with relatively high viscosity (the viscosity is 95 mm<2> / s at the temperature of 40 DEG C), the maximum adsorption capacity is as high as 7.70 g / g, and high adsorption of the oil substances is realized.

Description

technical field [0001] The invention relates to the technical field of biomass materials, in particular to an amination-modified lignin-based polyurethane foam and its preparation method and application. Background technique [0002] The pollution caused by the leakage of oil and chemicals is one of the most serious environmental problems nowadays. At present, oil spills are commonly treated by adsorption methods. The materials used to absorb crude oil and its derivatives include bagasse, plant fibers, clay, polyurethane foam, etc. Among them, polyurethane foam has received extensive attention due to its rich pore structure and large adsorption capacity. However, these materials usually absorb water while absorbing oil, which greatly reduces the selectivity and efficiency of separation. In order to solve the above problems, one of the important methods is to incorporate fillers into polyurethane foams to improve the physical and chemical properties of polyurethane foams, su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64B01J20/26B01J20/28B01J20/30C08G101/00
CPCC08G18/6492B01J20/24B01J20/265B01J20/28011C08G2110/0083C08G2101/00
Inventor 邱学青郭炜奇林绪亮秦延林邱林彬陈泽童陈理恒张文礼俎喜红
Owner GUANGDONG UNIV OF TECH
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