WO2020124311A1 - 银纳米流体及其制备方法 - Google Patents

银纳米流体及其制备方法 Download PDF

Info

Publication number
WO2020124311A1
WO2020124311A1 PCT/CN2018/121435 CN2018121435W WO2020124311A1 WO 2020124311 A1 WO2020124311 A1 WO 2020124311A1 CN 2018121435 W CN2018121435 W CN 2018121435W WO 2020124311 A1 WO2020124311 A1 WO 2020124311A1
Authority
WO
WIPO (PCT)
Prior art keywords
nanoparticles
nanofluid
nano
silver
wires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/121435
Other languages
English (en)
French (fr)
Inventor
向雄志
黄东炎
彭湃
邱克垚
张国良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen University
Original Assignee
Shenzhen University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen University filed Critical Shenzhen University
Priority to PCT/CN2018/121435 priority Critical patent/WO2020124311A1/zh
Publication of WO2020124311A1 publication Critical patent/WO2020124311A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials

Definitions

  • the invention relates to the field of nanofluid heat transfer, in particular to the field of nanosilver wire and nanoparticle fluid heat transfer.
  • Nano-fluid refers to dispersing metal or non-metallic nano-powders into traditional heat exchange media such as water, alcohol, oil, etc., and preparing a new type of heat exchange media that is uniform, stable, and highly thermally conductive. This is an innovative research in the traditional field of nanotechnology applied to thermal engineering.
  • the base fluid is generally composed of non-metallic liquid molecules.
  • the base fluid is static, the internal heat transfer is performed between the non-metallic liquid molecules, and its thermal conductivity is determined by the thermal conductivity of the base liquid molecules. If high thermal conductivity particles are added to the base fluid, the thermal conductivity of these particles is much greater than that of the liquid, which can enhance the heat transfer inside the mixture, so that the overall thermal conductivity of the mixed fluid is greater than the base fluid.
  • the presence of micro-convection enhances the heat transfer process between particles and liquid.
  • the particles When there are suspended particles in the liquid, the particles are constantly collided by the surrounding fluid molecules, causing irregular movement of the particles.
  • the micro-motion of the nanoparticles causes micro-convection between the particles and the surrounding liquid.
  • the convective heat transfer coefficient of the liquid is much larger than the static thermal conductivity, thus enhancing the heat transfer process between the particles and the liquid.
  • Nanofluids In addition to enhancing the heat transfer efficiency of nanofluids, nanofluids have the advantages of small-scale effects and strong surface effects of nanomaterials. Compared with traditional fluids suspended with micrometer or millimeter-scale solid materials, their advantages are mainly reflected in: (1) Nano materials can be uniformly and stably dispersed in pure liquids with better suspension; (2) Nano materials have a small size effect, which will not cause wear or blockage to the objects used during use; (3) Nano materials have a strong surface effect , Its heat exchange area is large, and its thermal conductivity is improved.
  • nanomaterials that can be used as nanofluid heat transfer enhancement materials:
  • Metal and its oxide nanoparticles Au, Ag, Al (Al2O3), Cu (CuO), Fe (Fe2O3), Zn (ZnO), CeO2, TiO2, etc.
  • Non-metallic nanoparticles CNTs , CNFs and graphene, etc.
  • carbides SiC
  • nitrides Si3N4
  • alloys Al2Cu, Ag2Al, Ag-Cu
  • coating materials Alg+ZnO
  • the one-step method is to simultaneously complete the preparation process of the nanoparticles and the dispersion process of the nanoparticles in the base liquid.
  • the two-step method is to disperse the prepared nanoparticles into the base liquid by some means, and the preparation and dispersion process is carried out in two steps. Because the one-step preparation process is complicated, the required equipment is expensive, and does not have the capacity for mass production, so at this stage, the two-step method is mainly used to prepare nanofluids.
  • the nanoparticles in the nanofluid prepared by the two-step method are easy to self-polymerize, and the polymerized nanoparticles will precipitate out of the base liquid after long-term storage.
  • the invention provides a nanofluid and a preparation method thereof to solve the problems that the nanoparticles in the existing nanofluid are easy to agglomerate and have poor stability.
  • the invention provides a nanofluid and a preparation method thereof to solve the problems that the nanoparticles in the existing nanofluid are easy to agglomerate and have poor stability.
  • One aspect of the present invention provides a nanofluid, including nanoparticles, nanosilver wires, and a liquid medium, and organic polymers are adsorbed on the surfaces of the nanoparticles and nanosilver wires.
  • the organic polymer contains a mercapto group and a hydroxyl group.
  • the total mass concentration ratio range of the nanoparticles and the nanosilver wires is 0.20 to 1.0 g/L.
  • the content of the nano silver wire in the fluid is not less than 0.2g/L.
  • the diameter of the nano silver wire is 50-100 nm, and the length is 5-30 ⁇ m.
  • the nano particles include one or more of nano silver balls, nano silver cubes, carbon-coated nano silver particles, and copper-plated nano silver particles.
  • the nanoparticles have a particle size of 50-100 nm.
  • the liquid medium includes one or more of water, ethylene glycol, and n-tetradecane.
  • Another aspect of the present invention provides a method for preparing a nanofluid, including the following steps:
  • the centrifuged nanoparticles and nanosilver wires are dispersed in a liquid medium.
  • the nanoparticles and nanosilver wires are activated with acetone before the plating treatment.
  • the plating treatment is soaking in an organic polymer solution at 20-25°C for 20-25h.
  • the nanofluid is coated with a polymer film, so that the nanoparticles in the nanofluid are not easy to agglomerate, so they are more stable.
  • the polymer film has a hydrophilic group such as a mercapto group or a hydroxyl group, which improves the solubility of the entire nanoparticle and makes it have a certain solubility in water and organic solvents.
  • the nanofluid is doped with many nanowires, which can form a network cross-linked structure, which is complementary to the three-dimensional nanoparticles therein, and further enhances thermal conductivity.
  • an organic polymer coating is added on the basis of the traditional two-step method, so that the obtained nanofluid is not easy to self-polymerize, more stable and more uniform, and the preparation method of the present invention is simple to operate
  • the conditions are mild and the equipment requirements are not high, so it is suitable for large-scale industrial production.
  • Figure 1 is a schematic diagram of the nanofluid
  • Figure 2 is a scanning electron micrograph of the nanofluid
  • the embodiments of the present invention provide a nanofluid and a preparation method thereof to solve the problems that the nanoparticles in the existing nanofluid are easy to agglomerate and have poor stability.
  • the nanofluid includes nanoparticles, nanosilver wires and a liquid medium, and organic polymers are adsorbed on the surfaces of the nanoparticles and nanosilver wires.
  • the total mass concentration ratio range of the nanoparticles and the nanosilver wires is 0.20 to 1.0 g/L.
  • the concentration of metal nanoparticles and nanowires is high, and the thermal conductivity is better, but if the concentration is too large, the cost is too high, so this concentration is selected.
  • a combined mode of one-dimensional cross-linking and three-dimensional filling is formed to synergistically improve thermal conductivity.
  • the organic polymer contains a mercapto group and a hydroxyl group. Selecting an organic polymer containing a hydrophilic group can increase the water solubility of the coated nanoparticles, making the nanoparticles more universal.
  • Nano silver wires can form a cross-shaped network structure, greatly improving thermal conductivity.
  • the nano silver wire has a diameter of 50-100 nm and a length of 5-30 ⁇ m. A certain length is required to ensure the formation of a mesh structure to ensure thermal conductivity.
  • the nano particles include one or more of nano silver balls, nano silver cubes, carbon-coated nano silver particles, and copper-plated nano silver particles.
  • the nanoparticles have a particle size of 50-100 nm.
  • a smaller particle size has a larger volume under the same mass, and contributes more to thermal conductivity.
  • the liquid medium includes one or more of water, ethylene glycol, and n-tetradecane.
  • the solvent can be selected and mixed as needed to adjust the ratio.
  • Another aspect of the present invention provides a method for preparing a nanofluid, including the following steps:
  • the centrifuged nanoparticles and nanosilver wires are dispersed in a liquid medium.
  • the nanoparticles and nanosilver wires are activated with acetone.
  • Treatment with acetone can improve the surface properties and facilitate the next plating treatment.
  • the plating treatment is soaking in an organic polymer solution at 20-25°C for 20-25h. This condition only needs to be immersed at room temperature, the condition is simple, and the cost is saved.
  • the nanofluid is coated with a polymer film, so that the nanoparticles in the nanofluid are not easy to agglomerate, so they are more stable.
  • the polymer film has a hydrophilic group such as a mercapto group or a hydroxyl group, which improves the solubility of the entire nanoparticle and makes it have a certain solubility in water and organic solvents.
  • the nanofluid is doped with many nanowires, which can form a network cross-linked structure, which is complementary to the three-dimensional nanoparticles therein, and further enhances thermal conductivity.
  • an organic polymer coating is added on the basis of the traditional two-step method, so that the obtained nanofluid is not easy to self-polymerize, more stable and more uniform, and the preparation method of the present invention is simple to operate
  • the conditions are mild and the equipment requirements are not high, so it is suitable for large-scale industrial production.
  • the silver nanowires and nanoparticles after centrifugation are evenly dispersed in ethylene glycol to obtain a silver nanofluid.
  • This silver nanofluid can be stable for more than 2 years, and when its mass fraction is 0.0008wt%, the thermal conductivity is 28% higher than that of the dispersion medium.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)

Abstract

一种含纳米银线流体的制备方法，纳米流体由液体介质及分散在液体介质中的纳米颗粒和纳米银线组成，该制备方法主要步骤包括纳米颗粒和纳米银线的洗涤、活化、修饰、分离、分散。所述纳米材料经表面修饰处理，纳米银线和纳米颗粒分散稳定，没有团聚现象，且纳米银线搭载纳米颗粒形成网络结构，获得分散稳定、导热性能良好的纳米流体。

Description

银纳米流体及其制备方法 技术领域
本发明涉及纳米流体传热领域，尤其涉及一种纳米银线和纳米颗粒流体传热领域。
 背景技术
随着全球能源短缺局势的日益严峻和国际社会对节能减排的迫切需求，包括冶金、化工、制冷、供暖、太阳能热发电以及核工业等在内的能源产业均对仪器设备的换热效率提出了更高的要求，而纳米流体作为新兴的导热材料，凭借其比传统导热材料具有更加优异的换热性能，引起了科研工作者的重视。
自20世纪90年代以来,研究人员就开始探索将纳米材料技术应用于强化传热领域,研究新一代高效传热冷却技术。1995年,美国Argonne国家实验室的Choi等人首次提出了一个崭新的概念—纳米流体。纳米流体是指把金属或非金属纳米粉体分散到水、醇、油等传统换热介质中，制备成均匀、稳定、高导热的新型换热介质。这是纳米技术应用于热能工程这一传统领域的创新性研究。
相关的科研人员认为纳米流体强化基液内部能量传递是由于固体颗粒的加入改变了原来基液的传热结构。基液一般都是由非金属液体分子构成，基液静态时内部热量的传递是在非金属液体分子之间进行，其导热系数由基液分子本身的导热性决定。如果在基液中添加了高导热性粒子，由于这些粒子的导热系数比液体大很多，可以增强混合物内部的热量传递，使得混合液整体导热系数比基液大。而微对流现象的存在则增强了粒子与液体间热量传递过程。当液体中存在着悬浮的微粒时，微粒不断地受到周围流体分子的碰撞，从而引起微粒无规则的运动。纳米粒子的微运动使得粒子与其周围液体间产生微对流现象，液体的对流传热系数比静态的导热系数要大得多，因此增强了粒子与液体间热量传递过程。
纳米流体除了能增强流体的换热效率以外，同时由于纳米材料的小尺度效应和强表面效应，与悬浮有微米或毫米级固体材料的传统流体相比，它的优点主要体现在：(1)纳米材料能够在纯液体中均匀稳定地分散，悬浮性更好；(2)纳米材料具有小尺寸效应，在使用过程中不会对使用对象造成磨损或堵塞；(3) 纳米材料具有强表面效应，其换热面积较大，导热性能提高。
目前可作为纳米流体传热增强材料的纳米材料大致有三大类：
(1)金属及其氧化物纳米粒子(Au、Ag、Al(Al2O3)、 Cu(CuO)、Fe(Fe2O3)、Zn(ZnO)、CeO2、TiO2等)；(2)非金属纳米粒子(CNTs、CNFs及石墨烯等)；(3)碳化物(SiC)、氮化物(Si3N4)、合金类(Al2Cu、Ag2Al、Ag-Cu)以及包覆材料(Ag+ZnO)等。
纳米流体的制备方法有一步法和两步法。一步法是将纳米颗粒的制备过程和纳米颗粒在基液中的分散过程同时完成。两步法是将制备好的纳米颗粒通过某种手段分散到基液中，制备和分散过程分两步进行。由于一步法制备工艺复杂，所需设备昂贵，不具备大批量生产的能力，所以现阶段主要采用两步法制备纳米流体。两步法制备的纳米流体中的纳米颗粒容易自聚，长时间放置后聚合的纳米颗粒会从基液中析出。
开发出一种稳定的不容易自聚的纳米流体的需求十分迫切。
 技术问题
本发明提供了一种纳米流体及其制备方法，来解决现有的纳米流体中的纳米颗粒容易团聚，稳定性差的问题。
 技术解决方案
本发明提供了一种纳米流体及其制备方法，来解决现有的纳米流体中的纳米颗粒容易团聚，稳定性差的问题。
本发明一方面提供了一种纳米流体，包括纳米颗粒、纳米银线和液体介质，所述的纳米颗粒和纳米银线表面吸附有有机高分子。
优选地，所述有机高分子含巯基和羟基。
优选地，所述纳米颗粒和纳米银线一共的质量浓度配比范围为0.20～1.0g/L。
优选地，所述纳米银线纳米银线在流体中的含量不低于0.2g/L。
优选地，所述纳米银线直径为50～100nm,长度为5～30µm。
优选地，所述纳米颗粒包括纳米银球、纳米银立方、碳包覆纳米银颗粒、镀铜纳米银颗粒中的一种或多种。
优选地，所述纳米颗粒粒径为50～100nm。
优选地，所述的液体介质包括水、乙二醇、正十四烷中的一种或多种。
本发明另一方面提供了一种纳米流体的制备方法，包括如下步骤：
将纳米颗粒和纳米银线进行的有机高分子镀层处理；
将所述镀有有机高分子的纳米颗粒和纳米银线进行离心分离；
将所述离心后的纳米颗粒和纳米银线分散于液体介质中。
优选地，所述镀层处理前将纳米颗粒和纳米银线用丙酮进行活化处理。
优选地，所述镀层处理为20-25℃下在有机高分子溶液中浸泡20-25h。
 有益效果
所述纳米流体由于镀了一层高分子膜，使得所述纳米流体中的纳米粒子不容易发生团聚，因此更具有稳定性。另一方面所述高分子膜带有巯基或羟基这样的亲水基团，改善了整体纳米粒子的溶解性，使其在水中，有机溶剂中都具有一定溶解度。所述纳米流体中掺杂了很多纳米线，可以形成网状交联结构，与其中的三维纳米颗粒形成互补，进一步增强导热性能。
所述纳米流体的制备方法，在传统的两步法的基础上加了一个有机高分子镀层处理，使得所得的纳米流体不容易自聚，更稳定，更均一，而且本发明的制备方法操作简单，条件温和，对设备要求也不高，因此适合大规模工业生产。
 附图说明
图1是所述纳米流体的示意图
图2是所述纳米流体的扫描电镜图
 本发明的最佳实施方式
为了使本发明要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明实施例提供了一种纳米流体及其制备方法，来解决现有的纳米流体中的纳米颗粒容易团聚，稳定性差的问题。
一方面提供了一种纳米流体。所述纳米流体包括纳米颗粒、纳米银线和液体介质，所述的纳米颗粒和纳米银线表面吸附有有机高分子。
所述纳米颗粒和纳米银线一共的的质量浓度配比范围为0.20～1.0g/L。金属纳米颗粒和纳米线的浓度高，导热性能更好，但是浓度太大成本太高，因此选取此浓度。而且通过一维纳米线与三维的纳米颗粒之间协同作用，形成一维交联，三维填充的组合模式，协同提升导热性能。
所述有机高分子含巯基和羟基。选取含有亲水性基团的有机高分子可以增加镀膜纳米粒子的水溶性，使得所述纳米粒子的普适性更强。
所述纳米银线在流体中的含量不低于0.2g/L。纳米银线可以形成交叉的网状结构，大大提升导热性。
所述纳米银线直径为50～100nm,长度为5～30µm。需要一定长度保证形成网状结构，来保证导热性能。
所述纳米颗粒包括纳米银球、纳米银立方、碳包覆纳米银颗粒、镀铜纳米银颗粒中的一种或多种。
所述纳米颗粒粒径为50～100nm。较小的粒径相同质量下有较大的体积，对导热性能的贡献更大。
所述的液体介质包括水、乙二醇、正十四烷中的一种或多种。可以根据需要选取溶剂进行混合，调整比例。
本发明另一方面提供了一种纳米流体的制备方法，包括如下步骤：
将所述活化后的纳米颗粒和纳米银线进行待巯基或者羟基的有机高分子的镀层处理；
将所述镀有有机高分子的纳米颗粒和纳米银线进行离心分离；
将所述离心后的纳米颗粒和纳米银线分散于液体介质中。
所述镀层处理前将纳米颗粒和纳米银线用丙酮进行活化处理。用丙酮处理可以使得表面性质得到改善，利于下一步的镀层处理。
所述镀层处理为20-25℃下在有机高分子溶液中浸泡20-25h。此条件只需要在室温下浸泡即可，条件简单，而且节约成本。
所述纳米流体由于镀了一层高分子膜，使得所述纳米流体中的纳米粒子不容易发生团聚，因此更具有稳定性。另一方面所述高分子膜带有巯基或羟基这样的亲水基团，改善了整体纳米粒子的溶解性，使其在水中，有机溶剂中都具有一定溶解度。所述纳米流体中掺杂了很多纳米线，可以形成网状交联结构，与其中的三维纳米颗粒形成互补，进一步增强导热性能。
所述纳米流体的制备方法，在传统的两步法的基础上加了一个有机高分子镀层处理，使得所得的纳米流体不容易自聚，更稳定，更均一，而且本发明的制备方法操作简单，条件温和，对设备要求也不高，因此适合大规模工业生产。
实施例1
(1)取一定比列的纳米银线和纳米颗粒放入500mL烧杯中，倒入350mL的无水乙醇，进行超声波震荡洗涤10min,然后进行离心，将纳米银线和纳米颗粒按上述步骤反复洗涤三次，得到纯纳米颗粒和纳米银线。
(2)将洗涤后的纳米颗粒和纳米银线加入到100mL丙酮溶液中，活化1h后取出。
(3)将活化后的纳米颗粒和纳米银线倒入100mL带有巯基或羟基的高分子溶液中，搅拌均匀，放在25℃条件下放置24h,带有巯基或羟基的高分子吸附在纳米颗粒和纳米银线表面形成自组装单分子层。
(4)将纳米颗粒、纳米银线和高分子混合液以3000r/min的转速离心20min,得到吸附有巯基和羟基基团的纳米颗粒和纳米银线。
(5)将离心后的纳米颗粒和纳米银线均匀分散在DI水中，得到一种银纳米流体。此银纳米流体可以稳定存在2年以上，且其质量分数为0.0008wt%时，导热系数比分散介质的导热系数提高40%。
实施例2
(1)取一定比列的纳米银线和纳米颗粒放入500mL烧杯中，倒入350mL的无水乙醇，进行超声波震荡洗涤10min,然后进行离心，将纳米银线和纳米颗粒按上述步骤反复洗涤三次，得到纯纳米颗粒和纳米银线。
(2)将洗涤后的纳米颗粒和纳米银线加入到100mL丙酮溶液中，活化1h后取出。
(3)将活化后的纳米颗粒和纳米银线倒入100mL带有巯基或羟基的高分子溶液中，搅拌均匀，放在50 oC条件下放置24h,带有巯基或羟基的高分子吸附在纳米颗粒和纳米银线表面形成自组装单分子层。
(4)将纳米颗粒、纳米银线和高分子混合液以4000r/min的转速离心20min,得到吸附有巯基和羟基基团的纳米颗粒和纳米银线。
(5)将离心后的纳米银线和纳米颗粒均匀分散在乙二醇中，得到一种银纳米流体。此银纳米流体可以稳定存在2年以上，且其质量分数为0.0008wt%时，导热系数比分散介质的导热系数提高28%。
实施例3
(1)取一定比列的纳米银线和纳米颗粒放入500mL烧杯中，倒入350mL的无水乙醇，进行超声波震荡洗涤10min,然后进行离心，将纳米银线和纳米颗粒按上述步骤反复洗涤三次，得到纯纳米颗粒和纳米银线。
(2)将洗涤后的纳米颗粒和纳米银线加入到100mL丙酮溶液中，活化1h后取出。
(3)将活化后的纳米颗粒和纳米银线倒入100mL带有巯基或羟基的高分子溶液中，搅拌均匀，放在50 oC条件下放置24h,带有巯基或羟基的高分子吸附在纳米颗粒和纳米银线表面形成自组装单分子层。
(4)将纳米颗粒、纳米银线和高分子混合液以4000r/min的转速离心20min,得到吸附有巯基和羟基基团的纳米颗粒和纳米银线。
(5)将离心后的纳米银线和纳米颗粒均匀分散在1：1的乙二醇/正十四烷混合溶液中，得到一种银纳米流体。此银纳米流体可以稳定存在2年以上，且其质量分数为0.001wt%时，导热系数比分散介质的导热系数提高20%。
实施例4
(1)取一定比列的纳米银线和纳米颗粒放入500mL烧杯中，倒入350mL的无水乙醇，进行超声波震荡洗涤10min,然后进行离心，将纳米银线和纳米颗粒按上述步骤反复洗涤三次，得到纯纳米颗粒和纳米银线。
(2)将洗涤后的纳米颗粒和纳米银线加入到100mL丙酮溶液中，活化1h后取出。
(3)将活化后的纳米颗粒和纳米银线倒入100mL带有巯基或羟基的高分子溶液中，搅拌均匀，放在50 oC条件下放置24h,带有巯基或羟基的高分子吸附在纳米颗粒和纳米银线表面形成自组装单分子层。
(4)将纳米颗粒、纳米银线和高分子混合液以4000r/min的转速离心20min,得到吸附有巯基和羟基基团的纳米颗粒和纳米银线。
(5)将离心后的纳米银线和纳米颗粒均匀分散在1：1的乙二醇/正十四烷混合溶液中，得到一种银纳米流体。此银纳米流体可以稳定存在2年以上，且其质量分数为0.001wt%时，导热系数比分散介质的导热系数提高20%。

Claims (10)

  1. 一种纳米流体，包括纳米颗粒、纳米银线和液体介质，其特征在于：所述的纳米颗粒和纳米银线表面吸附有有机高分子。
  2. 如权利要求1所述的纳米流体，其特征在于：所述有机高分子含巯基和羟基。
  3. 如权利要求1所述的纳米流体，其特征在于：所述纳米颗粒和纳米银线一共的质量浓度配比范围为0.20～1.0g/L。
  4. 如权利要求1所述的纳米流体，其特征在于：所述纳米银线在所述纳米流体中的含量不低于0.2g/L。
  5. 如权利要求1所述的纳米流体，其特征在于：所述纳米银线直径为50～100nm,长度为5～30µm。
  6. 如权利要求1或2任意一项所述的纳米流体，其特征在于：所述纳米颗粒包括纳米银球、纳米银立方、碳包覆纳米银颗粒、镀铜纳米银颗粒中的一种或多种。
  7. 如权利要求5所述的纳米流体，其特征在于：所述纳米颗粒粒径为50～100nm。
  8. 根据权利1所述的纳米流体，其特征在于：所述的液体介质包括水、乙二醇、正十四烷中的一种或多种。
  9. 一种纳米流体的制备方法，其特征在于，包括如下步骤：
    将纳米颗粒和纳米银线采用有机高分子的镀层处理；
    将所述镀有有机高分子的纳米颗粒和纳米银线进行固液分离处理；
    将经所述固液分离处理的所述纳米颗粒和纳米银线分散于液体介质中。
  10. 如权利要求9所述的纳米流体的制备方法，其特征在于：所述镀层处理前用丙酮处理；和/或
    所述镀层处理为20-25℃下将所述纳米颗粒和纳米银线置于在所述有机高分子溶液中浸泡20-25h。
PCT/CN2018/121435 2018-12-17 2018-12-17 银纳米流体及其制备方法 Ceased WO2020124311A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/121435 WO2020124311A1 (zh) 2018-12-17 2018-12-17 银纳米流体及其制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/121435 WO2020124311A1 (zh) 2018-12-17 2018-12-17 银纳米流体及其制备方法

Publications (1)

Publication Number Publication Date
WO2020124311A1 true WO2020124311A1 (zh) 2020-06-25

Family

ID=71100100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/121435 Ceased WO2020124311A1 (zh) 2018-12-17 2018-12-17 银纳米流体及其制备方法

Country Status (1)

Country Link
WO (1) WO2020124311A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1948421A (zh) * 2005-10-13 2007-04-18 鸿富锦精密工业（深圳）有限公司 工作流体
US20110088593A1 (en) * 2010-12-23 2011-04-21 Mansour Hemmati Silver dz nano-fluid composition for nano-fin formation and a method of producing the same
CN105022103A (zh) * 2015-07-06 2015-11-04 上海大学 用于磁流体变形镜的银纳米薄膜的制备方法
IN284469B (zh) * 2009-08-17 2017-06-30 Indian Inst Technology
CN108359414A (zh) * 2018-03-08 2018-08-03 济南大学 Go与球形银纳米颗粒复合醇基纳米流体及其制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1948421A (zh) * 2005-10-13 2007-04-18 鸿富锦精密工业（深圳）有限公司 工作流体
IN284469B (zh) * 2009-08-17 2017-06-30 Indian Inst Technology
US20110088593A1 (en) * 2010-12-23 2011-04-21 Mansour Hemmati Silver dz nano-fluid composition for nano-fin formation and a method of producing the same
CN105022103A (zh) * 2015-07-06 2015-11-04 上海大学 用于磁流体变形镜的银纳米薄膜的制备方法
CN108359414A (zh) * 2018-03-08 2018-08-03 济南大学 Go与球形银纳米颗粒复合醇基纳米流体及其制备方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WANG, WENZHI: "Research on Preparation and Properties of Silver Nanofluids", CHINESE MASTER’S THESES FULL-TEXT DATABASE, ENGINEERING SCIENCE & TECHNOLOGY I, 15 March 2017 (2017-03-15), ISSN: 1674-0246 *

Similar Documents

Publication Publication Date Title
CN102059082B (zh) 纳米二氧化锰/碳复合微球的制备方法
CN101310899B (zh) 大批量制备银纳米线的方法
CN105694356B (zh) 一种多孔空心酚醛树脂纳米球和碳纳米球及制备方法
CN106115805B (zh) 纳米分层结构钴酸镍/二硫化钼微球的制备方法
CN104987657B (zh) 一种耐磨纳米材料改性酚醛树脂及其制备方法
CN113787194B (zh) 利用单宁酸涂层辅助酚醛树脂微球表面原位还原形成超小尺寸和高密度纳米银粒子的方法
CN109096998B (zh) 一种光热转换相变储能复合材料的制备方法
CN106085368A (zh) 一种纳米导热增强的微胶囊复合相变储能材料及其制备方法
CN105081310A (zh) 一种制备石墨烯增强铝基复合材料的方法
CN107523276A (zh) 一种高温微胶囊铝硅合金相变材料及其制备方法
CN104857945A (zh) 一种氧化锌/碳微米球复合材料的制备方法
CN105061980B (zh) 一种超耐磨纳米材料改性酚醛树脂及其制备方法
CN104889382A (zh) 六方氮化硼纳米片沉积纳米银颗粒复合材料的制备方法
CN103602933A (zh) 高导碳纳米管改性铝材料及其制备方法
CN100478398C (zh) 一种制备聚合物/碳纳米管复合材料的方法
CN104277468A (zh) 一种木质素/金属纳米粒子的复合材料及其制法
CN111253913A (zh) 一种基于石墨烯复合骨架结构的储热材料及其制备方法
CN104538600B (zh) 一种AgNPs/MoS2功能复合材料及其制备方法
CN104209515A (zh) 一种碳纳米管包覆金属颗粒的制备方法
CN103432973B (zh) 一种石墨烯-三氧化二铁纳米颗粒复合材料的制备方法
CN104307537A (zh) 一种MoS2/Ag2S纳米复合光催化材料的制备方法
CN112429739B (zh) 一种具有吸波性能的二氧化硅/氮掺杂碳纳米管的方法
CN114160806A (zh) 生物质还原制备的核壳式结构银纳米颗粒及其制备方法
CN107128907A (zh) 一种改进的氧化石墨烯和石墨烯的尺寸分级方法
CN103911123B (zh) 一种纳米铜修饰碳纳米管/石蜡温敏复合材料的制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18943384

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 28.09.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18943384

Country of ref document: EP

Kind code of ref document: A1