Preparation method and applications of Mg/Al/C fiber-polyurethane foamed material

A technology of foaming materials and fiber materials, which is applied in the field of polymer composite material synthesis, can solve problems such as poor stability, and achieve the effects of high adsorption rate, high practical value, good oil absorption and removal effect

Active Publication Date: 2017-04-26

江苏锐嘉新能源科技有限公司

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AI-Extracted Technical Summary

Problems solved by technology

However, the stability of this material is poo...

Method used

[0100] The results show that the Mg/Al/C fiber-polyurethane foam material prepared by the present invention has good stability, and is easy to separate, environmentally friendly and energy-saving. Using Mg/Al/C fiber-polyurethane porous foam material ...

Abstract

The invention belongs to the technical field of polymer composite material synthesis, relates to the preparation of a carbon fiber-polyurethane porous foamed material, and especially relates to a preparation method and applications of a Mg/Al/C fiber-polyurethane foamed material. The preparation method comprises the following steps: preparing a Mg/Al/C fiber material, subjecting the Mg/Al/C fiber material to hydrophobic modification, mixing hydrophobic Mg/Al/C fibers, polyether polyol NJ-330, a foaming agent, a foam stabilizer, and a catalyst at a room temperature under stirring, adding toluene diisocyanate, and carrying out one-step foaming method to obtain the foamed material. Vinyl triethoxysilane is used to carry out hydrophobic modification on the Mg/Al/C fiber material; the Mg/Al/C fiber powder is uniformly dispersed into a foamed material, the oil absorbing performance, anti-aging property, and thermal stability of the foamed material are enhanced, and the comprehensive performance of the foamed composite material is improved. Trichloromethane is taken as the adsorption object, and the test results show that the foamed material has a good oil absorbing and eliminating effect, so the foamed material can be used to process petroleum leakage, organic solvent pollution, and the like, the operation is simple, and the adsorption rate is high.

Application Domain

Other chemical processesWater/sewage treatment by sorption

Technology Topic

Aging propertyToluene diisocyanate +11

Examples

Experimental program(8)

Example Embodiment

[0036] Example 1

[0037] (1) Dry the fresh bamboo, pulverize it with a pulverizer, and sieve it to obtain bamboo powder of less than 100 meshes. The obtained bamboo powder was placed in a high temperature tube furnace and calcined at 550°C for 1 h to obtain bamboo charcoal powder. Take 0.3 g of bamboo powder and add it to a glassware, then put it into a stainless steel reaction kettle lined with PTFE containing 3 mL of concentrated nitric acid, and then move it into an oven at 120 °C for 3 h. After taking out, the acid is washed away with distilled water to obtain modified bamboo charcoal powder;

[0038] (2) 20 g aluminum nitrate (Al(NO) 3 ) 3 •9H 2 O) was dissolved in 200 ml of deionized water, and gradually added ammonia water (c=1 mol/L) to the solution while stirring at room temperature. When pH=8, the dropwise addition was stopped, and the precipitate was obtained by suction filtration. The precipitate was redissolved in 200 mL of deionized water, peptized by adding 0.41 mL of hydrochloric acid, and sealed and aged at 85 °C for 10 h to obtain a transparent sol. Take 1 g of bamboo carbon powder and add it to 200 mL of alumina sol and let it stand for 12 h, take it out for filtering and drying, and then place it in the alumina sol. The above process is repeated 5 times, and Al/C fibers are obtained after filtering and drying;

[0039] (3) The obtained 0.2 g Al/C fiber, 1.03 g magnesium nitrate (Mg(NO) 3 ) 2 •6H 2 O), 0.84 g of hexamethylenetetramine was dissolved in 60 mL of deionized water. The mixed solution was added to a stainless steel reactor lined with PTFE, and then placed in an oven at 90 °C for 8 h. After taking out, filter, wash with deionized water for several times, and dry to obtain Mg/Al/C fiber material;

[0040] (4) Dissolve 0.5 g of Mg/Al/C fiber material in 40 mL of a solution with a volume ratio of ethanol: water of 1:1, add hydrochloric acid, adjust pH=3, stir for 30 min, and add 0.02 g vinyl dropwise Triethoxysilane. The mixed solution was placed in a microwave reaction generator, and the reaction conditions were adjusted to 85 °C, 700 W, and the reaction was carried out for 2 h. After taking out, it was washed with distilled water and dried to obtain a hydrophobic Mg/Al/C fiber material.

[0041] (5) Add 0.08g of hydrophobic Mg/Al/C fiber material and 10g of polyether polyol (NJ-330) into a plastic cup at room temperature, mix well with an electric mixer, and then add 0.62g of sodium bicarbonate and 0.38g of silicone oil , 0.06g dibutyltin dilaurate (DBLT), stir and mix at room temperature;

[0042] (6) Quickly add 1.34g of toluene diisocyanate (TDI) to the plastic cup, stir evenly for 5s, stop stirring when bubbles appear in the mixture and turn white, free to foam, and then place it in a 90°C oven for 3h , to obtain Mg/Al/C fiber material-polyurethane foam material (Mg/Al/C/PU-1);

[0043] (7) 20 mL of chloroform was added to the large test tube, and then Mg/Al/C/PU-1 foaming material was added as an oil absorbing agent, shaken, and placed at room temperature for 24 h, which was used for the absorption of organic solvents , the measured absorption rate is between 15 and 30 times its own mass.

Example Embodiment

[0044] Example 2

[0045] (1) Dry the fresh bamboo, pulverize it with a pulverizer, and sieve it to obtain bamboo powder of less than 100 meshes. The obtained bamboo powder was placed in a high-temperature tube furnace and calcined at 650 °C for 3 h to obtain bamboo charcoal powder. Take 0.3 g of bamboo powder and add it to a glassware, then put it in a stainless steel reaction kettle lined with PTFE containing 3 mL of concentrated nitric acid, and then move it into an oven at 120 °C for 5 h. After taking out, the acid is washed away with distilled water to obtain modified bamboo charcoal powder;

[0046] (2) 20 g aluminum nitrate (Al(NO) 3 ) 3 •9H 2 O) was dissolved in 200 ml of deionized water, and gradually added ammonia water (c=1 mol/L) to the solution while stirring at room temperature. When pH=8, the dropwise addition was stopped, and the precipitate was obtained by suction filtration. The precipitate was redissolved in 200 mL of deionized water, peptized by adding 0.41 mL of hydrochloric acid, and sealed and aged at 85 °C for 10 h to obtain a transparent sol. Take 1 g of bamboo carbon powder and add it to 200 mL of alumina sol and let it stand for 12 h, take it out for filtering and drying, and then place it in the alumina sol. The above process is repeated 5 times, and Al/C fibers are obtained after filtering and drying;

[0047] (3) The obtained 0.3 g Al/C fiber, 1.3 g magnesium nitrate (Mg(NO) 3 ) 2 •6H 2 O), 0.84 g of hexamethylenetetramine was dissolved in 60 mL of deionized water. The mixed solution was added to a stainless steel reactor lined with PTFE, and then placed in an oven at 90 °C for 8 h. After taking out, filter, wash with deionized water for several times, and dry to obtain Mg/Al/C fiber material;

[0048] (4) Dissolve 0.5 g Mg/Al/C fiber material in 40 mL of a solution with a volume ratio of ethanol: water of 1:1, add hydrochloric acid, adjust pH=3, stir for 30 min, and add 0.08 g vinyl dropwise Triethoxysilane. The mixed solution was placed in a microwave reaction generator, and the reaction conditions were adjusted to 85 °C, 700 W, and the reaction was carried out for 2 h. After taking out, it was washed with distilled water and dried to obtain a hydrophobic Mg/Al/C fiber material.

[0049] (5) Add 0.3g of hydrophobic Mg/Al/C fiber material and 10g of polyether polyol (NJ-330) into a plastic cup at room temperature, mix well with an electric mixer, then add 0.75g of sodium bicarbonate and 0.5g of silicone oil , 0.07g dibutyltin dilaurate (DBLT), stir and mix at room temperature;

[0050] (6) Quickly add 1.67g of toluene diisocyanate (TDI) to the plastic cup, stir evenly for 20s, stop stirring when bubbles appear in the mixture and turn white, foam freely, and then place it in a 110°C oven for 2h , to obtain Mg/Al/C fiber material-polyurethane foam material (Mg/Al/C/PU-2);

[0051] (7) 20 mL of chloroform was added to the large test tube, and then Mg/Al/C/PU-2 foaming material was added as an oil absorbing agent, shaken, and placed at room temperature for 24 h, which was used for the absorption of organic solvents , the measured absorption rate is between 18 and 35 times its own mass.

Example Embodiment

[0052] Example 3

[0053] (1) Dry the fresh bamboo, pulverize it with a pulverizer, and sieve it to obtain bamboo powder of less than 100 meshes. The obtained bamboo powder was placed in a high-temperature tube furnace and calcined at 850 °C for 4 h to obtain bamboo charcoal powder. Take 0.3 g of bamboo powder and add it to a glass vessel, then put it in a PTFE-lined stainless steel reaction kettle filled with 3 mL of concentrated nitric acid, and then move it into an oven at 120 °C for 7 h. After taking out, the acid is washed away with distilled water to obtain modified bamboo charcoal powder;

[0054] (2) 20 g aluminum nitrate (Al(NO) 3 ) 3 •9H 2 O) was dissolved in 200 ml of deionized water, and gradually added ammonia water (c=1 mol/L) to the solution while stirring at room temperature. When pH=8, the dropwise addition was stopped, and the precipitate was obtained by suction filtration. The precipitate was redissolved in 200 mL of deionized water, peptized by adding 0.41 mL of hydrochloric acid, and sealed and aged at 85 °C for 10 h to obtain a transparent sol. Take 1 g of bamboo carbon powder and add it to 200 mL of alumina sol and let it stand for 12 h, take it out for filtering and drying, and then place it in the alumina sol. The above process is repeated 5 times, and Al/C fibers are obtained after filtering and drying;

[0055] (3) The obtained 1.0 g Al/C fiber, 1.03 g magnesium nitrate (Mg(NO) 3 ) 2 •6H 2 O), 0.84 g of hexamethylenetetramine was dissolved in 60 mL of deionized water. The mixed solution was added to a stainless steel reactor lined with PTFE, and then placed in an oven at 90 °C for 8 h. After taking out, filter, wash with deionized water for several times, and dry to obtain Mg/Al/C fiber material;

[0056] (4) Dissolve 0.5 g of Mg/Al/C fiber material in 40 mL of a solution with a volume ratio of ethanol:water of 1:1, add hydrochloric acid, adjust pH=4, stir for 30 min, and add 1.5 g vinyl dropwise. Triethoxysilane. The mixed solution was placed in a microwave reaction generator, and the reaction conditions were adjusted to 85 °C, 700 W, and the reaction was carried out for 2 h. After taking out, it was washed with distilled water and dried to obtain a hydrophobic Mg/Al/C fiber material.

[0057] (5) 1.27 g of hydrophobic Mg/Al/C fiber material and 10 g of polyether polyol (NJ-330) were added to a plastic cup at room temperature, mixed well with an electric mixer, and then 2.89 g of sodium bicarbonate, 1.24 g of organic Silicone oil, 0.12g dibutyltin dilaurate (DBLT), stir and mix at room temperature;

[0058] (6) Quickly add 4.18 g of toluene diisocyanate (TDI) to the plastic cup, stir evenly for 7 min, stop stirring when bubbles appear in the mixture and turn white, free to foam, and then place it in a 120 ℃ oven for curing 4h, to obtain Mg/Al/C fiber material-polyurethane foam material (Mg/Al/C/PU-3);

[0059] (7) 20 mL of chloroform was added to the large test tube, and then Mg/Al/C/PU-3 foaming material was added as an oil absorbing agent, shaken, and placed at room temperature for 24 h, which was used for the absorption of organic solvents , the measured absorption rate is between 10-29 times its own mass.

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Classification and recommendation of technical efficacy words

easy to operate

Preparation method and applications of Mg/Al/C fiber-polyurethane foamed material

A technology of foaming materials and fiber materials, which is applied in the field of polymer composite material synthesis, can solve problems such as poor stability, and achieve the effects of high adsorption rate, high practical value, good oil absorption and removal effect

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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