Method for preparing fire-proof, flame-retardant, ultra-light and high-strength paper pulp foam by using lignocellulose raw material

A wood fiber raw material, fire and flame retardant technology, applied in the field of green fiber materials and environmental protection materials, can solve the problems of foam strength, fire resistance, poor thermal insulation performance, long processing cycle, and high equipment production costs, and achieve the goal of lifting machinery. and fire resistance, broad industrialization prospects, and low equipment requirements

Active Publication Date: 2019-05-21
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods have the problems of long experimental period, high equipment production cost and complicated process, and it is difficult to form large-scale production
[0005] To sum up, there are still many problems in the foam preparation process that restrict its large-scale production and application, such as: in the drying process, the foam produces a large cavity, which affects the performance of the foam, and the processing cycle is long and not green. , Chemicals are expensive and difficult to recycle, and the preparation cost is high
In addition, the pulp foam prepared by the traditional method has poor strength, fire resistance and heat insulation performance, and is not easy to be commercialized
Modification requires complex, costly or environmentally unfriendly post-processing

Method used

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  • Method for preparing fire-proof, flame-retardant, ultra-light and high-strength paper pulp foam by using lignocellulose raw material
  • Method for preparing fire-proof, flame-retardant, ultra-light and high-strength paper pulp foam by using lignocellulose raw material
  • Method for preparing fire-proof, flame-retardant, ultra-light and high-strength paper pulp foam by using lignocellulose raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Using commercial bleached softwood pulp board as raw material to prepare pulp foam, follow the steps below:

[0031] (1) Use a pulverizer to break up the bleached softwood pulp board, then take 3 g of the broken up raw materials and place them in the reaction vessel, add 197mL of 0.1 M sodium tetraborate decahydrate solution and stir for 2 h at 35 ℃, adjust the stirring speed After adding 10 wt% of sepiolite inorganic filler (relative to natural fiber raw material) and 20 wt% of chitosan (relative to natural fiber raw material), continue to stir for 0.5h, the stirring speed is 1000 rpm; finally add hair The foaming agent sodium lauryl sulfate 5 wt% (relative to the natural fiber raw material) was stirred for 2 h at a stirring speed of 2000 rpm. After the reaction, it was cooled to room temperature.

[0032] (2) Remove excess foam and liquid by vacuum filtration. The obtained pulp foam is dried at ambient temperature for 2 hours, and then dried in an oven at 60°C f...

Embodiment 2

[0034] Example 2: Using commercial bleached hardwood pulp board as raw material to prepare pulp foam, follow the steps below:

[0035] (1) Disperse the bleached hardwood pulp board mechanically with a pulverizer, then take 3 g of the above raw materials and place them in the reactor, add 197 mL of 0.1 M sodium polyborate solution and react at 45 ℃ for 1 h, adjust the stirring speed to 2000 rpm ; Then add 1wt% of inorganic filler nano silica (relative to natural fiber raw material) and chitosan 5wt% (relative to natural fiber raw material), continue to stir for 1 h, the stirring speed is 1500 rpm. Finally, add 0.5wt% of foaming agent octylamine (relative to the natural fiber raw material) and continue to stir for 2 h at a stirring speed of 1000 rpm. After the reaction, cool to room temperature.

[0036] (2) Remove excess foam and liquid by vacuum filtration. The obtained pulp foam was dried at ambient temperature for 4 h, and then dried under vacuum at 30 ℃ for 8 h to form a pulp f...

Embodiment 3

[0038] Example 3: Using waste newspapers as raw materials to prepare pulp foam, follow the steps below:

[0039] (1) Use a pulverizer to break up waste newspapers, then take 3 g of the above raw materials and place them in a reaction vessel, and add 397 mL of 0.1 M sodium tetraborate decahydrate solution. Then stir at 90℃ for 0.5 h, adjust the stirring speed to 1000 rpm, then add the inorganic filler nano-zeolite 20 wt% (relative to the waste paper raw material) and chitosan 15 wt% (relative to the waste paper raw material), and continue to stir for 3 hours , The stirring speed is 1200 rpm. Finally, add 10 wt% of the foaming agent sodium dodecyl p-toluene sulfonate (relative to the waste paper raw material) and continue to stir for 0.5 h at a stirring speed of 1500 rpm. After the reaction, it is cooled to room temperature.

[0040] (2) Remove excess foam and liquid by vacuum filtration. The obtained pulp foam was dried at ambient temperature for 4 hours, and then dried at 25° C. ...

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Abstract

The invention provides a formula and a preparation method of fire-proof, flame-retardant, ultra-light and high-strength paper pulp foam. The formula comprises the following components in part by weight: 100 parts of natural wood fiber raw material, 0.5-10 parts of fire-proof cross-linking aid, 1-20 parts of inorganic filler, 0-20 parts of chitosan, 0.5-10 parts of foaming agent and a plurality ofparts of water, wherein the natural wood fiber raw material in the water is 0.5-5 wt%. The preparation method comprises the following steps: adding the mechanically-crushed natural wood fiber raw material into a fire-proof cross-linking aid solution and performing cross-linking reaction under heating and stirring conditions; continuously adding the inorganic filler and an appropriate amount of chitosan and continuously stirring till the reaction ends; then adding the foaming agent, mechanically stirring and foaming; removing excessive moisture and foam, drying and forming to obtain the paper pulp foam. By utilizing aid compounding and beneficial interaction among the different components, the prepared paper pulp foam is excellent in performance and has wide industrial prospect and expectedeconomic benefit.

Description

Technical field [0001] The invention belongs to the field of materials, and relates to the fields of green fiber materials and environmental protection materials, in particular to a pulp foam with ultra-light, high elasticity, fire and water resistance, and a preparation method thereof. Background technique [0002] Foam material is a kind of lightweight and high-porosity material that can achieve certain performance indicators. In recent years, porous foam materials have gradually become the focus of new material research due to their ultra-lightweight, permeable, high porosity, and high accessible surface area. At present, polymer foams are mainly made of non-degradable petroleum-based materials, which pose a threat to resources and the environment. Therefore, the development and utilization of renewable resources to replace traditional fossil resources has become an inevitable trend. Cellulose is a natural polymer compound with abundant reserves on the earth, which mainly exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L5/08C08K3/38C08K3/34C08K3/36C08K7/26C08J9/30C08J9/04
Inventor 刘超李滨张跃冬何思涵于光崔球
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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