CN101439282B - Method for preparing modified expanded graphite and use in benzene gas processing - Google Patents
Method for preparing modified expanded graphite and use in benzene gas processing Download PDFInfo
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- CN101439282B CN101439282B CN2008102437101A CN200810243710A CN101439282B CN 101439282 B CN101439282 B CN 101439282B CN 2008102437101 A CN2008102437101 A CN 2008102437101A CN 200810243710 A CN200810243710 A CN 200810243710A CN 101439282 B CN101439282 B CN 101439282B
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- expanded graphite
- naoh
- graphite
- modified expanded
- benzene gas
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Abstract
The invention relates to the fields of preparing modified expansion graphite and applications thereof. A preparation method for the modified expansion graphite is characterized in that: a fixed amount of expandable graphite is weighed, dipped for 0.5 to 1.5h by a fixed amount of NaOH(10 percent), filtered, washed and dried; then the expansion graphite is dipped for 0.5 to 2.5h by a fixed amount of H2O2(3 percent), filtered and washed; then the expansion graphite is dipped by a fixed amounted of KH-570 which is prepared, dried and taken out for cooling, thus obtaining the modified expansion graphite; wherein, the proportion of the expansion graphite, NaOH, H2O2 and KH-570 is 1(g) : 100(mL) : 100(mL) : 1 to 10(g). The invention has the advantages that: the surface of the expansion graphite dipped by NaOH, H2O2 and KH-570 is grafted with abundant functional groups, thus improving the absorption capacity to benzene gas; the expandable graphite can be used for purifying indoor air.
Description
Technical field
The present invention relates to the finishing and the application thereof of expanded graphite, refer in particular to a kind of preparation method of modified expanded graphite and the purposes of handling at benzene gas.
Background technology
Expanded graphite is a kind of cheapness and the extremely wide material of purposes is widely used in encapsulant, conductive material, sorbing material, fire-retardant fireproof material, catalysis material, medical material etc., especially on waste liquid, treatment of waste gas.Along with a large amount of uses of finishing material, indoor containing benezene harmful gas pollution is more and more serious.In order to reduce indoor environmental pollution and the health hazard that benzene brings after the interior decoration, need a kind of high adsorption capacity of exploitation and cheap material, harmful substance can be removed rapidly.Factors such as nowadays widely used sorbing material mainly is active carbon and coke, but less owing to its void ratio, and permeability is bad are in the application facet poor effect of handling benzene class pernicious gas.With the expanded graphite is raw material, adopts suitable method that modification is carried out on its surface, makes it help adsorbing benzene class pernicious gas, by the adsorption cleaning indoor environment.At present, be applied with the modified expanded graphite adsorptive liquid, to be modifier first with ammoniacal liquor carry out modification to expanded graphite to people such as Chen Zhigang, Sun Lixue handles the absorption that is used for formaldehyde gas, but be that adsorbent is not being seen open report aspect the absorption benzene pernicious gas with the expanded graphite.Expanded graphite is carried out suitable surface modification, can indoor harmful gas such as benzene be adsorbed targetedly, have application promise in clinical practice in improvement indoor environmental pollution field in certain functional group of its surface graft.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method of modified expanded graphite and the purposes of processing at benzene gas, its expanded graphite that makes take natural flake graphite as raw material is through NaOH+H
2O
2+ KH-570 carries out surface modification, by optimizing the ratio of expanded graphite and KH-570, makes expanded graphite surface graft functional group.
Specific embodiment of the present invention is: at normal temperatures, take by weighing the expanded graphite of certain mass, soak 0.5～1.5h with a certain amount of NaOH (10%), filter, clean, oven dry; Then use a certain amount of H
2O
2(3%) soaks 0.5～2.5h, filter, clean.A certain amount of KH-570 solution that will configure again soaks, oven dry, and cooling obtains modified expanded graphite.Wherein expanded graphite, NaOH, H
2O
2With the ratio of KH-570 be 1 (g): 100 (mL): 100 (mL): 1～10 (g).Prepared modified expanded graphite is used for absorption to benzene gas.
The modified expanded graphite that the present invention obtained can be used for benzene gas processing aspect is used to adsorb benzene gas at normal temperatures.
The modified expanded graphite that the present invention prepares is through NaOH+H
2O
2The expanded graphite of+KH-570 dipping, NaOH can remove the partial impurities ion on expanded graphite surface, and effects on surface produces etching, the increase specific area; H
2O
2Can make the expanded graphite surface produce carboxylic group, among the KH570
Easy and the benzene interaction of group, and-CH
2CH
2CH
2Si (OCH
3)
3Produce after the group hydrolysis-Si (OH)
3React with the carboxyl functional group on EG surface, make it be grafted on the EG surface, and KH570 self silicon hydroxyl has the self-crosslinking reaction generation, may increase on the one hand the quantity of small holes in the expanded graphite, can improve on the other hand expanded graphite to the adsorption capacity of benzene gas.
The invention has the advantages that: through NaOH+H
2O
2The expanded graphite surface graft of+KH-570 dipping abundant functional group, improved the adsorption capacity to benzene gas, can be used for the purification of room air.
Description of drawings
The SEM photo of expanded graphite pore structure before and after Fig. 1 modification
Expanded graphite and modification front and back active carbon is to the saturated extent of adsorption of benzene gas before and after Fig. 2 modification
The specific embodiment
Embodiment 1: take by weighing the expanded graphite of certain mass, soak certain hour with a certain amount of NaOH (10%) solution, filter, clean, oven dry; Then use a certain amount of H
2O
2(3%) soaks certain hour, filter, clean; Soak with a certain amount of KH-570 solution that configures again, oven dry, cooling obtains modified expanded graphite.Wherein expanded graphite, NaOH, H
2O
2With the ratio of KH-570 be 1 (g): 100 (mL): 100 (mL): 1 (g).The modified expanded graphite that makes is carried out static adsorption test to benzene gas under room temperature (25 ℃), maximal absorptive capacity can reach 112mg/g.
Embodiment 2: take by weighing the expanded graphite of certain mass, soak certain hour with a certain amount of NaOH (10%) solution, filter, clean, oven dry; Then use a certain amount of H
2O
2(3%) soaks certain hour, filter, clean; Soak with a certain amount of KH-570 solution that configures again, oven dry, cooling obtains modified expanded graphite.Wherein expanded graphite, NaOH, H
2O
2With the ratio of KH-570 be 1 (g): 100 (mL): 100 (mL): 5 (g).The modified expanded graphite that makes is carried out static adsorption test to benzene gas under room temperature (25 ℃), maximal absorptive capacity can reach 2800mg/g.
Embodiment 3: take by weighing the expanded graphite of certain mass, soak certain hour with a certain amount of NaOH (10%) solution, filter, clean, oven dry; Then use a certain amount of H
2O
2(3%) soaks certain hour, filter, clean; Soak with a certain amount of KH-570 solution that configures again, oven dry, cooling obtains modified expanded graphite.Wherein expanded graphite, NaOH, H
2O
2With the ratio of KH-570 be 1 (g): 100 (mL): 100 (mL): 4 (g).The modified expanded graphite that makes is carried out static adsorption test to benzene gas under room temperature (25 ℃), maximal absorptive capacity can reach 956mg/g.
Embodiment 4: take by weighing the expanded graphite of certain mass, soak certain hour with a certain amount of NaOH (10%) solution, filter, clean, oven dry; Then use a certain amount of H
2O
2(3%) soaks certain hour, filter, clean; Soak with a certain amount of KH-570 solution that configures again, oven dry, cooling obtains modified expanded graphite.Wherein expanded graphite, NaOH, H
2O
2With the ratio of KH-570 be 1 (g): 100 (mL): 100 (mL): 10 (g).The modified expanded graphite that makes is carried out static adsorption test to benzene gas under room temperature (25 ℃), maximal absorptive capacity can reach 167mg/g.
Comparative Examples: expanded graphite is to the static absorption property of benzene gas as shown in Figure 2 before and after active carbon, the modification before and after the modification.
Claims (2)
1. the preparation method of a modified expanded graphite is characterized in that taking by weighing the expanded graphite of certain mass, and the NaOH with 10% soaks 0.5～1.5h, filters, and cleans oven dry; Follow the H with 3%
2O
2Soak 0.5～2.5h, filter, clean; Soak with the KH-570 solution that configures, oven dry obtains modified expanded graphite, wherein expanded graphite, NaOH, H again
2O
2With the ratio of KH-570 be 1g: 100mL: 100mL: 1～10g.
2. the purposes that the modified expanded graphite that preparation method according to claim 1 obtains is handled at benzene gas is characterized in that at room temperature benzene gas being adsorbed with the modified expanded graphite of preparation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102437101A CN101439282B (en) | 2008-12-12 | 2008-12-12 | Method for preparing modified expanded graphite and use in benzene gas processing |
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|---|---|---|---|
| CN2008102437101A CN101439282B (en) | 2008-12-12 | 2008-12-12 | Method for preparing modified expanded graphite and use in benzene gas processing |
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|---|---|
| CN101439282A CN101439282A (en) | 2009-05-27 |
| CN101439282B true CN101439282B (en) | 2010-12-08 |
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| CN108753410A (en) * | 2018-05-29 | 2018-11-06 | 西安建筑科技大学 | A kind of preparation method of the controllable Ti/C detonators of heat release amount |
| CN108483439B (en) * | 2018-05-29 | 2021-07-06 | 西安建筑科技大学 | Preparation method of inerting powder for rapidly inhibiting wood powder deflagration |
| CN113694898B (en) * | 2021-10-13 | 2023-08-22 | 黑龙江省科学院高技术研究院 | Preparation method of linear alkyl modified expanded graphite |
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Address after: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee after: Jiangsu Polytechnic University Address before: 213164 Baiyun Road, bell tower area, Changzhou, Jiangsu Patentee before: Jiangsu Polytechnic University |
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Owner name: LIYANG CHANGDA TECHNOLOGY TRANSFER CENTER CO., LTD Free format text: FORMER OWNER: JIANGSU POLYTECHNIC UNIVERSITY Effective date: 20141205 |
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Effective date of registration: 20141205 Address after: Daitou town of Liyang City Ferry Street 213311 Jiangsu city of Changzhou province 8-2 No. 7 Patentee after: Liyang Chang Technology Transfer Center Co., Ltd. Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: Jiangsu Polytechnic University |