Preparation method of oxidized graphene/sodium lignin sulfonate modified polyurethane rigid foam material

A technology of sodium lignosulfonate and rigid foam, applied in the field of preparation of polyurethane rigid foam materials, can solve the problems of poor compatibility, poor dispersibility of graphene oxide and the like

Inactive Publication Date: 2018-02-23
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a kind of preparation of graphene oxide / sodium lignosulfonate modified polyurethane rigid foam in order to solve the poor compatibility between graphene and polyurethane matrix and the poor dispersion of graphene oxide in polyurethane foam method

Method used

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  • Preparation method of oxidized graphene/sodium lignin sulfonate modified polyurethane rigid foam material
  • Preparation method of oxidized graphene/sodium lignin sulfonate modified polyurethane rigid foam material
  • Preparation method of oxidized graphene/sodium lignin sulfonate modified polyurethane rigid foam material

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specific Embodiment approach 1

[0065] Specific embodiment one: the preparation method of graphene oxide / sodium lignosulfonate modified polyurethane rigid foam material in this embodiment is carried out according to the following steps:

[0066] Step 1: Sodium lignosulfonate solvent liquefaction:

[0067] Mix polyethylene glycol, glycerol and concentrated sulfuric acid to obtain a mixed solution A, stir the mixed solution A, add sodium lignosulfonate powder to the mixed solution A while stirring, and then heat the mixed solution A to React at 80-120°C for 30-60 minutes, stop heating after the reaction, and cool to room temperature naturally to obtain lignin liquefaction products;

[0068] Described glycerol and Polyethylene Glycol mass ratio are (1~2):9;

[0069] The mass ratio of the concentrated sulfuric acid to polyethylene glycol is 1:(9~30);

[0070] The polyethylene glycol is polyethylene glycol 400;

[0071] The mass percent composition of sulfuric acid in the concentrated sulfuric acid is 98%;

...

specific Embodiment approach 2

[0091] Embodiment 2: This embodiment is different from Embodiment 1 in that: the foaming catalyst described in Step 3 is triethylenediamine. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0092] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the chain extension catalyst described in step three is dibutyltin dilaurate. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of an oxidized graphene/sodium lignin sulfonate modified polyurethane foam material, relates to the preparation method of materials, and aims to solve theproblems of poor compatibility between graphene and a polyurethane monomer and poor dispersity of oxidized graphene in a polyurethane foam material. A method I comprises the following steps: liquidifying a sodium lignin sulfonate solvent; 2, modifying the oxidized graphene; 3, preparing a polyhydroxy component; 4, preparing an isocyanate component for foaming; 5, foaming. A method II comprises thefollowing steps: 1, liquidifying the sodium lignin sulfonate solvent; 2, modifying the oxidized graphene; 3, preparing the polyhydroxy component; 4, foaming. According to the preparation method disclosed by the invention, MDI (Diphenylmethane Diisocyanate)/sodium lignin sulfonate can be utilized for modifying the oxidized graphene, the modified oxidized graphene can be uniformly and stably dispersed in a base material, the modified oxidized graphene and connected sodium lignin sulfonate molecules or MDI are used as a whole, and the problem of compatibility of an inorganic additive-oxidized graphene in a polymer matrix is solved.

Description

technical field [0001] The invention relates to a preparation method of polyurethane rigid foam material. Background technique [0002] Polyurethane (PU) is made by the reaction of dibasic or polybasic organic isocyanate and polyol compound (polyether polyol or polyester polyol) with urethane (-NH-COO-) repeating structural unit Polymers are one of the most widely used polymer materials at present. Polyurethane foam materials are widely used in refrigerators, cold storage, building materials and other industries due to their advantages such as porosity, low relative density, high specific strength, excellent physical and mechanical properties, electrical properties, and simple preparation methods. Since the raw materials for the production of polyurethane foam materials are all from highly toxic and corrosive petrochemical products, the polyurethane industry has been greatly impacted by the depletion of petroleum resources. There are a large number of hydroxyl groups on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08K9/04C08K3/04C08G101/00
CPCC08G18/3206C08G18/4804C08G18/4833C08G18/6677C08G18/7664C08K3/04C08K9/08C08G2110/0025C08G2110/0083
Inventor 史瑞欣
Owner NORTHEAST FORESTRY UNIVERSITY
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