Preparation of magnesium oxide crystal orientation membrane on fire resistant organic fibre
A technology of organic fiber and crystal orientation, applied in the direction of magnesium oxide, fiber treatment, crystal growth, etc., can solve the problems such as the heat insulation performance of materials that have not been discussed, and achieve the effects of excellent fire resistance and high temperature resistance, improved fire resistance, and simple preparation methods
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Embodiment 1
[0034] (1) Modification of aramid fiber
[0035] The fabric was reflux cleaned with ether in a Soxhlet extractor for 12 hours, washed with twice distilled water, and finally dried at 80°C.
[0036] The mass fraction of sodium hydroxide used for modification in the aqueous solution is 7.5%. Soak the fabric in this series of solutions for 1 hour, soak twice and roll twice, pre-baked at 80°C, baked at 180°C, fully washed with water until neutral, and placed for 12 hours to reach balance.
[0037] (2) Preparation of magnesium hydroxide seed crystal
[0038] The temperature of the constant temperature water bath was constant at 35° C., the four-neck flask was placed in the constant temperature water bath, and 800 mL of polyvinylpyrrolidone (PVP) solution was added. Slowly add dilute NH to the flask 3 h 2 O solution (0.1mol / L) until the pH reaches 10.0, gradually add MgCl at a rate of 10mL / hr 2 solution (0.05mol / L), last for 2h, and control NH at the same time 3 h 2 The dropp...
Embodiment 2
[0046] (1) Modification of aramid fiber
[0047] The fabric was reflux washed with ether in a Soxhlet extractor for 12 hours, washed with twice distilled water, and finally pre-dried at 80°C.
[0048] The mass fraction of sodium hydroxide used for modification in the aqueous solution is 7.5%. Soak the fabric in this series of solutions for 1 hour, soak twice and roll twice, pre-baked at 80°C, baked at 180°C, fully washed with water until neutral, and placed for 12 hours to reach balance.
[0049] (2) Preparation of magnesium hydroxide seed crystal
[0050] The temperature of the constant temperature water bath was constant at 35° C., the four-neck flask was placed in the constant temperature water bath, and 800 mL of polyvinylpyrrolidone (PVP) solution was added. Slowly add dilute NH to the flask 3 ·H 2 O solution (0.1mol / L) until the pH reaches 10.0, gradually add MgCl at a rate of 10mL / hr 2 solution (0.05mol / L) for 2h, and at the same time control the NH 3 h 2 The dro...
Embodiment 3
[0058] (1) Modification of aramid fiber
[0059] The fabric was reflux cleaned with ether in a Soxhlet extractor for 12 hours, washed with twice distilled water, and finally dried at 80°C.
[0060] The mass fraction of sodium hydroxide used for modification in the aqueous solution is 7.5%. Soak the fabric in this series of solutions for 1 hour, soak twice and roll twice, pre-baked at 80°C, baked at 180°C, fully washed with water until neutral, and placed for 12 hours to reach balance.
[0061] (2) Preparation of magnesium hydroxide seed crystal
[0062] The temperature of the constant temperature water bath was constant at 35° C., the four-neck flask was placed in the constant temperature water bath, and 800 mL of polyvinylpyrrolidone (PVP) solution was added. Slowly add dilute NH to the flask 3 h 2 O solution (0.1mol / L) until the pH reaches 10.0, gradually add MgCl at a rate of 10mL / hr 2 solution (0.05mol / L) for 2h, and at the same time control the NH 3 h 2 The droppin...
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