CN111440470A - 一种镍包覆石墨烯的制备方法 - Google Patents

一种镍包覆石墨烯的制备方法 Download PDF

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CN111440470A
CN111440470A CN202010333939.5A CN202010333939A CN111440470A CN 111440470 A CN111440470 A CN 111440470A CN 202010333939 A CN202010333939 A CN 202010333939A CN 111440470 A CN111440470 A CN 111440470A
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戴亚洲
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Abstract

一种镍包覆石墨烯的制备方法；将石墨分解成10‑20nm大小的颗粒，用氮气吹入不锈钢管内；5米长处使用超高频感应加热至1250度，管内产生高频震荡，形成网状通道，加速石墨的分离；30米处用空气电加热器加热至600‑850度，10米处温度控制在500度‑30度，分梯度加热，超声波在管中传播形成震振网，分散团聚石墨烯，进行冷凝；将镍水倒入高速风口，吹入真空，在真空管中高速直线运动，超声波网形震动击散，使空中石墨烯呈网状分布，镍粉超速碰击石墨烯将石墨烯包覆，再将氮气充入，用超声波网过滤；将耐高温水性树脂添加到镍包覆石墨烯中制成涂料。本发明制备方法简单，可广泛应用于涂层领域，有效提高换热器、冷凝器的使用效率，延长使用寿命。

Description

一种镍包覆石墨烯的制备方法
技术领域
本发明涉及一种金属包覆石墨烯的方法，特别是涉及一种镍包覆石墨烯的制备方法，属于新型耐腐高温超导热纳米材料领域。
背景技术
冷凝器、换热器在高温情况下渗透腐蚀严重，导致更换频率高，用量上升。而不锈钢、双钼不锈钢、钛合金板等耐腐蚀的材料成本贵，使用寿命短；石墨烯是一种超导耐腐材料，不足之处是不耐高温；石墨烯在温度上升到500度以上时会碳化，导热耐腐性能下降。
发明内容
本发明的目的就是要提供解决以上问题，提供一种运用物理化学动力学原理实现镍包覆石墨烯的制备方法，镍是一种抗氧、耐腐材料，粘性大，运用金属镍作为基本材料包覆石墨烯，镍包覆石墨烯是解决石墨烯不耐高温问题的关键，镍包覆石墨烯具有抗氧化的特性，能提高综合材料的能力。镍包覆石墨烯涂层可代替贵金属，价格合理，具有耐腐性、导热性，可满足环保发展需求。
本发明的技术方案是这样实现的：一种镍包覆石墨烯的制备方法，其特点是：包括以下步骤：
(1)采用热分解方式将石墨分解成10-20nm大小的颗粒，将颗粒状石墨用氮气吹入不锈钢管内；管长共50m，在5米长处使用超高频感应加热至1250度，管内产生高频震荡，形成网状通道，加速石墨的分离；30m处用空气电加热器加热至中温600-850度，确保压强为105pa，通入氮气；10m长的部分温度控制在500度-30度，分梯度加热，超声波在管中传播速度是5300m/s，形成震振网，分散团聚石墨烯，冷凝负0度～20度，出口的颗粒为10-20nm的石墨烯；
(2)将金属镍放入中频炉，用超声波形成震动网，把纳米石墨烯分布在空中，将镍水倒入高速风口，风速每钞560m/s吹入真空，在真空管中高速直线运动，高速网碰，超声波网形震动击散，使空中石墨烯呈网状分布，镍粉超速碰击石墨烯将石墨烯包覆，再将氮气充入，用超声波网过滤；
(3)将70-100g耐高温水性树脂，添加到10-20g镍包覆石墨烯中制成涂料，涂料的导电导热率在58w/(m·℃)-73w/(m·℃)之间。
进一步的，所述的热分解方式是利用基质的院子结构分离石墨。
进一步的，所述的不锈钢管的管径为20cm，长为50m，厚15-30mm，耐热时间达到310s。
本发明的有益效果是：本发明采用物理化学动力学原理制备镍包覆石墨烯，制备方法简单，可用于量产，制得的镍包覆石墨烯具有耐高温、耐腐蚀，导热性好的特点，可广泛应用于涂层领域，有效提高换热器、冷凝器的使用效率，延长使用寿命。
具体实施方式
为使本发明实现的技术手段、创作特征以及达成目的易于明白了解，下面举实例对本发明进行详细描述。
本发明包括以下步骤：
(1)石墨烯物理制备：将1-5μm颗粒大小的石墨放入缸中，采用热分解方式，利用基质的原子结构将石墨分离成纳米10-20nm；将箱内石墨用氮气吹入管径20cm，长为50m的不锈钢管内，不锈钢管厚15-30mm，耐热310s。不锈钢管总长50m，将其中一段5m长的不锈钢管超高频感应加热，加热至高温1250度，在管内产生高频震荡，形成网状通道，加速石墨分离；一段30米长的部分用空气电加热器加热至中温600-850度，确保常压105pa，通入氮气；一段10m长的不锈钢管温度控制在500度-30度，分梯度加热，在管内一段5m处使用超声波，大管径18cm，长50cm，小径2cm，从小管径2cm处，超声波在管中传播速度是5300m/s，形成震振网，分散团聚石墨烯，冷凝负0度～20度，出口的颗粒为10-20nm的石墨烯，进入收集箱里；
(2)镍包覆过程：用中频炉把镍熔化，使用一根直径为1m管长为27m的真空，在10m处用超声波大孔径为1m、长为2米，小口径为20mm形成震动网，震动波速340m/s，风速560m/s，把纳米石墨烯分布在空中，将镍水倒入高速风口，风速每钞560m/s吹入真空，在真空管中高速直线运动，高速网碰，超声波网形震动击散，使空中石墨烯呈网状分布，镍粉超速碰击石墨烯将石墨烯包覆，再将氮气充入，用超声波网过滤；
(3)将70-100g耐高温水性树脂，添加到10-20g镍包覆石墨烯中制成涂料，涂料的导电导热率在58w/(m·℃)-73w/(m·℃)之间。
所述缸体是装置反应原材料的箱体。所述氮气浓度为98％。所述高频振荡的频率为5300m/s。
实施例1：
将1-5μm颗粒大小的石墨放入缸中，采用热分解方式，利用基质的原子结构将石墨分离成10-20nm。
将10-20nm大小的粉状石墨用98％氮气吹入管径20cm，长为50m的耐热性能达到310s的厚15-30mm的不锈钢管内。
管长共50m，5m长的部分使用超高频感应加热至1250度，管内产生高频震荡，形成网状通道，加速石墨的分离；
30米长的部分用空气电加热器加热至中温600-850度，确保压强为105pa，通入氮气；
10m长的不锈钢管部分温度控制在500度-30度，分梯度加热，在管内一段5米处使用超声波，大管径18cm，长50cm，小径2cm，从小管径2cm处，超声波在管中传播速度是5300m/s，形成震振网，分散团聚石墨烯，冷凝负0度～20度，出口的颗粒为10-20nm的石墨烯，进入收集箱里。
将1000g金属镍放入中频炉，通入一根真空管，直径为1m管长为27m，在10m处用超声波形成震动网，震动波速达到340m/s，风速560m/s，把纳米石墨烯分布在空中，将镍水倒入高速风口，风速每钞560m/s吹入真空，在真空管中高速直线运动，高速网碰，超声波网形震动击散，使空中石墨烯呈网状分布，镍粉超速碰击石墨烯将石墨烯包覆，再将氮气充入，用超声波网过滤。
将70-100g耐高温水性树脂，添加到10-20g镍包覆石墨烯中制成涂料，涂料的导电导热率在58w/(m·℃)-73w/(m·℃)之间。

Claims (3)

1.一种镍包覆石墨烯的制备方法，其特征在于：包括以下步骤：
(1)采用热分解方式将石墨分解成10-20nm大小的颗粒，将颗粒状石墨用氮气吹入不锈钢管内；管长共50m，在5米长处使用超高频感应加热至1250度，管内产生高频震荡，形成网状通道，加速石墨的分离；30m处用空气电加热器加热至中温600-850度，确保压强为105pa，通入氮气；10m长的部分温度控制在500度-30度，分梯度加热，超声波在管中传播速度是5300m/s，形成震振网，分散团聚石墨烯，冷凝负0度～20度，出口的颗粒为10-20nm的石墨烯；
(2)将金属镍放入中频炉，用超声波形成震动网，把纳米石墨烯分布在空中，将镍水倒入高速风口，风速每钞560m/s吹入真空，在真空管中高速直线运动，高速网碰，超声波网形震动击散，使空中石墨烯呈网状分布，镍粉超速碰击石墨烯将石墨烯包覆，再将氮气充入，用超声波网过滤；
(3)将70-100g耐高温水性树脂，添加到10-20g镍包覆石墨烯中制成涂料，涂料的导电导热率在58w/(m·℃)-73w/(m·℃)之间。
2.根据权利要求1所述的一种镍包覆石墨烯的制备方法，其特征在于：所述的热分解方式是利用基质的院子结构分离石墨。
3.根据权利要求1所述的一种镍包覆石墨烯的制备方法，其特征在于：所述的不锈钢管的管径为20cm，长为50m，厚15-30mm，耐热时间达到310s。
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