Method for granulating amorphous boron powder
An amorphous boron powder and granulation technology, which is applied in the methods of granulating raw materials, chemical instruments and methods, chemical/physical processes, etc. problems, to achieve the effect of small yield value and apparent viscosity, long pot life and low environmental damage
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Embodiment 1
[0028]In the kneading pot of a 2L vertical kneader, add 50ml ethyl acetate, 9.40g HTPB binder prepolymer (hydroxyl value: 0.67mmol / g), 0.60g TDI curing agent and 0.1gTPB curing catalyst in sequence, and use bamboo chips Premix evenly, start the heating cycle system, and control the temperature of the material during kneading to 40°C. Add amorphous boron powder (92% B content, 1μm particle size) into the kneading pot in 3 steps, add 70g for the first time, start kneading after pre-mixing evenly, and control the speed of the stirring paddle at 20-25r / min during the kneading process , stop kneading after 30 minutes, clean up the material on the stirring paddle and the wall of the pot; add 20g of boron powder to the kneading pot for the second time, knead for 10 minutes after premixing, then stop kneading, and clean up the materials on the kneading pulp and the wall of the pot; Add 10g of boron powder to the kneading pot once, knead for 20min after premixing, then stop kneading,...
Embodiment 2
[0046] The implementation method of this example is basically the same as Example 2, except that the adhesive prepolymer uses polyethylene glycol-tetrahydrofuran copolymer (PET) with an amount of 9.10 g, and the curing agent uses N-100 with an amount of 0.90 g.
[0047] Performance Testing
[0048] The test apparatus and test method are the same as in Example 1, and the results are shown in Table 3 below.
[0049] Table 3 Properties of amorphous boron powder
[0050] sample name pH Yield value (Pa) Apparent viscosity (Pa·s) Amorphous boron powder raw material 5.13 85.3 64.5 Granulating Amorphous Boron Powder 7.21 72.7 50.1
Embodiment 3
[0052] The implementation method of this example is basically the same as Example 1, except that IPDI is used as the curing agent, and the dosage is 0.70g, while the dosage of HTPB is 9.30g.
[0053] Performance Testing
[0054] The test apparatus and test method are the same as in Example 1, and the results are shown in Table 4 below.
[0055] Table 4 Properties of amorphous boron powder
[0056] sample name pH Yield value (Pa) Apparent viscosity (Pa·s) Amorphous boron powder raw material 5.13 85.3 64.5 Granulating Amorphous Boron Powder 7.35 75.4 52.7
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