CN1166558C - 用纳米石墨溶胶制备纳米石墨碳粉的方法 - Google Patents
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Abstract
本发明公开了一种用纳米石墨溶胶制备纳米石墨碳粉的方法，它是将制得的纳米石墨溶胶加入包裹剂而得，将纳米石墨碳溶胶加入0.1～5%的包裹剂，搅拌均匀后加入干燥器皿中，然后加热，控制温度在30℃～70℃，溶胶完全干燥后，将成片状或大颗粒状的物质研磨成细粉即得。本发明具有工艺方法简单，生产成本低，适合于工业化生产，产品颗粒度小，分散性好等优点。它解决了纳米石墨碳粉制备中易团聚、难分散的难题，可广泛应用于电池、石油、化工、电子、农业、医疗保健、材料改性等行业。
Description
技术领域
本发明涉及一种制备纳米石墨碳粉的方法，特别是一种用纳米石墨溶胶制备纳米石墨碳粉的方法。
背景技术
大量研究表明，在纳米尺寸范围的石墨碳具有许多优良的特性，它的应用为许多行业带来重大的技术突破和技术革命，其应用领域也不断扩大。但是当石墨碳尺寸达到纳米范围时，由于其具有强烈的吸附性并带负电，从而使纳米石墨碳素材料易团聚、难分散，成为纳米石墨碳素材料制备和应用的最大难点。目前国际上只有少数几个国家能够生产，而国内还没有能生产小于30nm纳米石墨碳粉的报道。
发明内容
要制备纳米石墨碳粉，首先要制备出纳米石墨溶胶，制备纳米石墨溶胶的方法是：将石墨电极按正负极排列放入氧化槽中，正、负电极之间用塑料网隔开，电极及电源的连接采用串并联方式，再将电解液倒入氧化槽内，接通电源，电源控制在5～150A，电压控制在3～20V，进行氧化处理，控制温度在80℃以下，每隔4～12小时搅拌一次，检测槽内石墨碳浓度，溶胶浓度为0.1～5％时，氧化结束，槽中溶液即为纳米石墨碳溶胶。
本发明的目的在于：提供一种在纳米石墨溶胶中加入包裹剂，使纳米石墨碳颗粒外层形成包裹，从而解决了石墨碳颗粒易团聚、难分散的问题。
本发明是这样实现的：它是将制得的纳米石墨溶胶加入包裹剂而得，在纳米石墨碳溶胶内加入0.1～5％的包裹剂，搅拌均匀后放入干燥器皿中，然后加热，控制温度在30～70℃，溶胶完全干燥后，再将成片状或大颗粒状的物质研磨成细粉即得。
所述的包裹剂包括：木素质、油酸、鱼油、纳米二氧化硅、钛酸酯隅联剂，在溶胶中所占的重量百分比为：木素质0.1～3％、油酸0.1～2％、鱼油0.1～2％、纳米二氧化硅0.1～3％、钛酸酯隅联剂0.1～2％。包裹剂可单独加入，也可混合加入。
本发明与现有技术相比，具有工艺方法简单，生产成本低，适合于工业化生产，产品颗粒度小，分散性好等忧点。它解决了纳米石墨碳粉制备中易团聚、难分散的难题，其颗粒度小于15nm，在水中分散性达100％。可广泛应用于电池、石油、化工、电子、农业、医疗保健、材料改性等行业，并将为这些行业带来一系列重大技术突破。
具体实施方式
本发明的实施例：先制取纳米石墨溶胶，将石墨电极按正负极排列放入氧化槽中，正、负电极之间用塑粒网隔开，电极与电源的连接采用串并联方式，再将电解液倒入氧化槽内，接通电源，电流控制在5～150A，电压控制在3～20V，进行氧化处理，控制温度在80℃以下，每隔4～12小时搅拌一次，检测槽内石墨碳浓度，溶胶浓度为0.1～5％时，氧化结束，槽中溶液即为纳米石墨碳溶胶。取浓度为0.1～5％、颗粒度80％以上小于10nm的纳米石墨溶胶，加入溶胶重量3％的木素质，2％的油酸，搅拌均匀后装入干燥器皿中，然后加热，控制温度在30～70℃，同时开始抽真空，待溶胶完全干燥后，将成片状或大颗粒状的物质研磨成细粉即得。
Claims (2)
1、一种用纳米石墨溶胶制备纳米石墨碳粉的方法，它是将制得的纳米石墨溶胶单独加入或混合加入包裹剂，其特征在于：在纳米石墨碳溶胶内加入0.1～5％的包裹剂，包裹剂分别为木素质、油酸、鱼油、钠米二氧化硅，将与包裹剂搅拌均匀后的溶胶放入干燥器皿中，然后加热，控制温度在30～70℃，溶胶完全干燥后，再将成片状或大颗粒状的物质研磨成细粉即得纳米石墨碳粉。
2、根据权利要求1所述的用纳米石墨溶胶制备纳米石墨碳粉的方法，其特征在于：包裹剂在溶胶中所占的重量百分比为：木素质0.1～3％、油酸0.1～2％、鱼油0.1～2％、纳米二氧化硅0.1～3％。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100433942C (zh) * | 2003-05-19 | 2008-11-12 | 刘键 | 包含纳米复合材料的电发热膜及其制备方法 |
| CN1294079C (zh) * | 2003-08-12 | 2007-01-10 | 刘键 | 由纳米石墨碳溶胶制备纳米石墨碳粉的方法 |
| CN1323940C (zh) * | 2004-01-21 | 2007-07-04 | 刘芳德 | 纳米石墨碳溶胶的制备方法 |
| CN102689895B (zh) * | 2010-12-30 | 2014-07-09 | 王宏晓 | 高纯度高细度石墨粉的制备方法及应用 |
| CN103964420A (zh) * | 2011-09-27 | 2014-08-06 | 王宏晓 | 一种高纯度高细度石墨粉的制备方法 |
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