Plant polysaccharide heat insulation aerogel material and preparation method
A thermal insulation and aerogel technology, which is applied to the preparation of konjac polysaccharide thermal insulation aerogel and the field of konjac polysaccharide thermal insulation aerogel, can solve the problems of environmental pollution, pollute the environment, easy to burn, etc. The effect of improving mechanical properties
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Embodiment 1
[0052] A kind of konjac polysaccharide thermal insulation aerogel, it is made of the raw material of following weight or volume:
[0053]
[0054]
[0055] A method for preparing konjac polysaccharide thermal insulation airgel, characterized in that it is prepared according to the following steps:
[0056] (1) Chitosan was dissolved in 50mL 1v / v% acetic acid solution, stirred at room temperature for 30min to obtain solution A;
[0057] (2) Take a certain amount of deionized water and add glycerin, under the condition of mechanical stirring at 800rpm, then add starch, konjac glucomannan, auxiliary glue, straw, nano-calcium carbonate, and stir quickly to obtain solution B;
[0058] (3) Mix solution A and solution B to obtain solution C, and stir solution C at 60°C for 3.5 hours to obtain a transparent viscous gel;
[0059] (4) Pour the stirred transparent viscous gel homogeneously into a mold and cool it into a gel;
[0060] (5) Pre-freezing at -30°C for 24 hours;
[00...
Embodiment 2-8
[0062] Embodiment 2-8: According to the raw material components in Table 1, according to the process parameters in Table 2, the preparation steps are the same as those in Example 1. The performance indexes of the prepared konjac polysaccharide thermal insulation airgel are shown in Table 3.
[0063] Table 1: The raw material composition table of embodiment
[0064]
[0065]
[0066] Table 2. Process parameter list
[0067]
Example 2
Example 3
Example 4
Example 5
Example 6
Example 7
Example 8
Solution A stirring time (min)
45
30
35
55
50
60
30
speed(rpm)
700
600
800
900
1200
1500
400
Stirring temperature of solution C (°C)
75
70
75
80
85
90
60
Solution C stirring time (h)
0.8
0.5
1
1.5
2.5
3
0.5
Pre-freezing temperature (℃)
-15
-10
-20
-25
-45
-60
-12
Pre-freezing time (h)
8
6
10
...
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