A kind of preparation method of poplar floc/biomass fiber composite thermal insulation material

A composite thermal insulation material and biomass fiber technology, which is applied in the field of building thermal insulation materials, can solve the problems of urban cleanliness and human respiratory hazards, increased weight and density of composite materials, and large differences in mechanical properties of composite materials. The effect of reducing the preparation cost and low cost

Active Publication Date: 2021-09-03
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Liu Juan and others attached poplar fiber to the surface of polypropylene filament, and prepared poplar / polypropylene nonwoven insulation material by spunbonding method (Liu Juan, Xu Zhenglin, Zeng Beini, etc., Morphology Analysis of Poplar Fiber and the preparation and characterization of thermal insulation materials, Wuhan Textile University Journal, 2016, 29, 3:3-7), the thermal insulation performance of the prepared composite fabric has been significantly improved, and the problem that poplar fiber is short and cannot be formed can be used as The wadding material is used in the thermal insulation field, but due to manual laying, the poplar wadding fiber uniformity is poor in this method, and the mechanical properties of the composite material vary greatly.
[0007] The Chinese invention patent with the publication number CN107488910 A discloses a composite insulation material prepared from poplar fiber, polypropylene fiber and cotton fiber at a ratio of 9:6:4. The blended fiber greatly strengthens the gap between the poplar fiber The cohesion force of the material improves the thermal insulation performance and air permeability of the material, but this method leads to a decrease in the flexibility of the poplar fiber and a significant increase in the weight and density of the composite material
[0008] Yin Jianhua et al. used wet-laid web-forming technology (Yin Jianhua, Zhang Yubin, Ma Jun, Research on Forming Method for Poplar Velvet Fiber Bloom, Cotton Textile Technology, 2014, 42, 2: 75-78), so that the poplar fiber was evenly distributed. Attached to the net curtain, and adding low-temperature hot-melt fiber to reinforce the composite material, the prepared material has the advantages of fluffy, moisture-proof, heat insulation, good resilience, etc., and can be used as outdoor floor mats, greenhouses and other fields to keep warm. However, Although the hot-melt fiber can strengthen the poplar fiber, it will reduce the thermal insulation performance of the composite material
[0009] Poplar catkins not only cause great harm to urban cleanliness and human respiratory tract, but also have extremely low utilization rate. Biomass fiber materials have limited their development due to their high preparation costs. Preparation of poplar floc / biomass fiber composite thermal insulation material by floc cross-linking can effectively improve the application value of poplar floc and reduce the cost of thermal insulation material preparation, which is a key technical problem that needs to be solved urgently in this field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The embodiment of the present invention provides a preparation method of poplar catkin / bamboo parenchyma cell-derived microfibrillated cellulose composite thermal insulation material.

[0042] 1. Raw materials: poplar fiber, bamboo parenchyma cells.

[0043] 2. The specific process steps are as follows:

[0044] S1. Sieve the bamboo after crushing, collect the material passing through the standard 30-60 mesh screen, add deionized water 20 times the volume of the material, stir and let it stand, and collect the floating matter in the upper layer to be the parenchyma cells;

[0045]S2, take by weighing 10g parenchyma cells and join in phenylethanol solution (volume ratio 2:1) and extract 6 hours, and collect precipitation part, parenchyma cells are joined in the acidified sodium chlorite solution of 1wt% (pH value 2-4) react at 75°C for 6 hours, wherein the acidified sodium chlorite with the same concentration is changed every 1 hour, and then the parenchyma cells are tr...

Embodiment 2

[0052] The embodiment of the present invention provides a preparation method of poplar floc / bamboo fiber source microfibrillated cellulose composite thermal insulation material.

[0053] 1. Raw materials: poplar fiber, bamboo fiber.

[0054] 2. The specific process steps are as follows:

[0055] S1. Sieve the bamboo after crushing, collect the material passing through the standard 30-60 mesh screen, add deionized water 20 times the volume of the material, stir and let it stand, and collect the lower sediment as fiber;

[0056] S2, take by weighing 10g parenchyma cells and join in phenylethanol solution (volume ratio 2:1) and extract 6 hours, and collect precipitation part, parenchyma cells are joined in the acidified sodium chlorite solution of 1wt% (pH value 2-4) Reaction at 75°C for 8 hours, wherein the acidified sodium chlorite with the same concentration was changed every 1 hour, and then the treated thin-walled Cells were treated at 90°C for 2 hours each, and finally ad...

Embodiment 3

[0063] The embodiment of the present invention provides a preparation method of poplar catkin / bamboo parenchyma cell-derived microfibrillated cellulose composite thermal insulation material.

[0064] 1. Raw materials: poplar fiber, bamboo parenchyma cells.

[0065] 2. The specific process steps are as follows:

[0066] S1. Sieve the bamboo after crushing, collect the material passing through the standard 30-60 mesh screen, add deionized water 20 times the volume of the material, stir and let it stand, and collect the floating matter in the upper layer to be parenchyma cells;

[0067] S2, take by weighing 10g parenchyma cells and join in phenylethanol solution (volume ratio 2:1) and extract 6 hours, and collect precipitation part, parenchyma cells are joined in the acidified sodium chlorite solution of 1wt% (pH value 2-4) Reaction at 75°C for 6 hours, wherein the acidified sodium chlorite with the same concentration was changed every 1 hour, and then the treated thin-walled C...

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Abstract

The invention discloses a preparation method of poplar floc / biomass fiber composite thermal insulation material, comprising: degreasing poplar floc to obtain defatted poplar floc, and pretreating biomass fiber to prepare broomified fiber sol to control poplar floc The raw material mass ratio of the fiber and the fiber is 10:1-4, then add the defatted poplar floc into the diluted fiber sol, and stir evenly to obtain the mixed liquid of the defatted poplar / fiber, and drain the excess diluent in sequence It is obtained after pre-freezing and vacuum freeze-drying. The preparation method provided by the invention can prepare composite insulation materials with different pore structures and different thicknesses by changing the content of poplar flocs and biomass fibers and the pre-freezing temperature; the poplar flocs used have a wide range of sources and low cost, and the biomass fibers The pretreated broom fiber can form a three-dimensional network structure, which improves the thermal insulation performance of the composite thermal insulation material. The method has simple process, low preparation energy consumption and low cost, and has broad practical application prospects.

Description

technical field [0001] The invention belongs to the technical field of building thermal insulation materials, and in particular relates to a preparation method of a poplar catkin / biomass fiber composite thermal insulation material. Background technique [0002] Insulation materials are an important means to reduce building energy consumption and greenhouse gas emissions. With the increasingly serious problem of global warming, the application of insulation materials is becoming more and more important. Traditional insulation materials include polystyrene, polyurethane, cork, mineral wool, melamine, etc.; super insulation materials include vacuum panels, airgel, vacuum glass, etc. [0003] Traditional thermal insulation materials are widely used due to their low cost and simple preparation process, but the thickness of traditional thermal insulation materials is relatively thick, which increases the complexity of the building structure, and is not environmentally friendly, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L99/00C08L1/02
Inventor 黄汉霄喻云水张晓凤王汉坤黎静
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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