阅读说明：本技术 包含氮化硼纳米板的纳米复合材料及其制备方法 (Nanocomposite material comprising boron nitride nanoplates and method of making the same ) 是由 洪淳亨 柳浩振 柳承澯 于 2017-06-28 设计创作，主要内容包括：本发明涉及利用氮化硼的自然模拟有机/无机复合材料,本发明的包含氮化硼纳米板(BNNP)的纳米复合材料,包括：氮化硼纳米板(BNNP,Boron Nitride nanoplatelet)；包括与所述氮化硼纳米板结合的侧链结构的高分子官能团；以及包括从由NH基团、NH<Sub>2</Sub>基团、OH基团及COOH基团组成的官能团组中选择的一种或以上的官能团的线性聚合物,其中,所述官能团对与所述高分子官能团结合的所述氮化硼纳米板单体进行交联。(The invention relates to a natural simulated organic/inorganic composite material using boron nitride, the invention containing nitrogenA nanocomposite of Boron Nitride Nanoplates (BNNPs), comprising: boron Nitride nanoplates (BNNP, Boron Nitride nanoplates); a polymer functional group including a side chain structure bonded to the boron nitride nanoplate; and from NH groups, NH 2 A linear polymer of one or more functional groups selected from the group consisting of a group, an OH group and a COOH group, wherein the functional groups crosslink the boron nitride nanoplate monomer bonded to the polymer functional group.)

1. A nanocomposite comprising boron nitride nanoplates, comprising:

a boron nitride nanoplate;

a polymer functional group including a side chain structure bonded to the boron nitride nanoplate; and

comprising from NH groups, NH₂A linear polymer of one or more functional groups selected from the group consisting of a group, an OH group and a COOH group, wherein the functional groups crosslink the boron nitride nanoplate monomer bonded to the polymer functional group.

2. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the polymer functional group is selected from the group consisting of NH group and NH₂A polymer material having one or more functional groups selected from the group consisting of a group, an OH group and a COOH group.

3. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the high molecular functional group includes one or more selected from the group consisting of hyperbranched polyglycidyl ether, branched polyglycerol, hyperbranched polyethyleneimine and branched polyethyleneimine.

4. The nanocomposite comprising boron nitride nanoplates as in claim 1,

when the high molecular functional group includes one or more selected from hyperbranched polyglycidyl ether or branched polyglycerol,

the linear polymer comprises a high molecular material, and the high molecular material comprises NH groups and NH₂A group or a functional group of both.

5. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the linear polymer includes one or more selected from the group consisting of gelatin, collagen, polyethyleneimine, 1,6-nylon, polyvinylamine, and polystyrene.

6. The nanocomposite comprising boron nitride nanoplates as in claim 1,

when the polymeric functional group comprises hyperbranched polyethyleneimine or branched polyethyleneimine,

the linear polymer includes a high molecular material including functional groups of OH groups, COOH groups, or both.

7. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the linear polymer includes one or more selected from the group consisting of polyvinyl alcohol, polylactic acid, polyglycolide, polycaprolactone, polybutylene succinate, and polyethylene terephthalate.

8. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the nano composite material is used as a simulated natural structure, and the shape of the nano composite material is a layered aggregate of the boron nitride nano plate monomers combined with the high molecular functional group.

9. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the crosslinking between the boron nitride nanoplate monomers binding the high molecular functional group is performed by one or more selected from the group consisting of hydrogen bonding, electrostatic interaction, and van der waals bonding.

10. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the high molecular functional group accounts for 0.1 to 50 wt% relative to the total weight of the boron nitride nanoplate monomer.

11. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the linear polymer comprises from 0.1 to 50 wt% relative to the total weight of the nanocomposite.

12. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the boron nitride has a hexagonal crystal structure.

13. The nanocomposite comprising boron nitride nanoplates as in claim 1,

the thickness of the boron nitride nano-plate is less than 10 nm.

14. A method for preparing a nanocomposite comprising boron nitride nanoplates, comprising the steps of:

mechanically stripping boron nitride and preparing a boron nitride nano plate;

bonding hyperbranched polyglycidyl ether functional groups to the boron nitride nanoplates by self-assembly, thereby forming boron nitride nanoplate monomers;

mixing the formed boron nitride nano-plate monomer with a monomer containing NH group and NH₂Mixing linear polymers of one or more functional groups selected from the group consisting of a group, an OH group and a COOH group to form a mixed dispersion;

the mixed dispersion was vacuum filtered.

15. The method for preparing a nanocomposite material comprising a boron nitride nanoplate according to claim 14,

the preparation method of the boron nitride nano plate comprises the following steps:

one or more selected from the group consisting of the boron nitride and the alkali material are charged into a container and ball-milled.

16. The method for preparing a nanocomposite material comprising a boron nitride nanoplate according to claim 14,

the bonding between the respective boron nitride nano-plate monomers and the bonding between the boron nitride nano-plate monomers and the linear polymer are performed by one or more selected from the group consisting of hydrogen bonding, electrostatic interaction, van der waals bonding.

[ technical field ] A method for producing a semiconductor device

The present invention relates to an organic/inorganic composite material using boron nitride.

[ background of the invention ]

In recent years, organic-inorganic composite materials used for various materials have been required to have high physical properties, and since the middle of the 90 s of the 20 th century, research for developing new concept materials having high physical properties has been continuously conducted, and at present, combination with nanotechnology is being actively attempted.

Among them, two-dimensional nanostructure materials have a uniform planar shape and a thickness composed of one or more layers of atoms, and one of the most active researches in the field of chemistry and materials is a research on two-dimensional nanostructure materials, and the research subject thereof is diversified with the fusion of the fields of electronics, mechanics and biotechnology.

Boron Nitride (BN) materials, which are of particular interest, have mechanical and thermal properties similar to graphene, and physical properties at high temperatures remain unchanged, showing great potential as reinforcing materials for composite materials. In particular, the structure of boron atoms and nitrogen atoms of a hexagonal crystal boron nitride material is planar two-dimensional hexagonal and has a hexagonal crystal structure, and the physical properties and chemical properties of the hexagonal crystal boron nitride material are similar to those of graphite. Therefore, hexagonal crystal boron nitride is a material having high physical and chemical stability. In addition, it can be stabilized at 3000 ℃ at most in an inert atmosphere, has high thermal shock resistance due to its high thermal conductivity equivalent to that of stainless steel, and does not crack or fail even after repeated rapid heating and rapid cooling at about 1500 ℃. And also has extremely high-temperature lubricity and corrosion resistance. In addition, the electric resistance value is extremely high, the variation of the electric resistance value is small particularly at high temperature, and the electric insulation material can be used in a wide temperature range and can emit ultraviolet rays when an electric field is applied. In addition, boron nitride is the same as graphene, impermeable to all gases and liquids, transparent, and has good elasticity due to the space gap of the hexagonal honeycomb structure formed by connecting boron atoms and nitrogen atoms in a net shape. Boron nitride has been drawing attention because of its special structure and physical properties, so that it can be applied not only to an insulator of a semiconductor material but also to a material such as an ultraviolet light generator and a barrier film, and a bio-composite material.

In addition, the artificial bone material should not only be harmless to the human body, but also have physical properties such as high strength, high toughness, low elastic modulus, and the like. However, in the case of the artificial bone material developed at present, replacement surgery must be performed every 10 to 15 years due to the separation problem caused by the continuous stress shielding phenomenon occurring during repeated use. According to surveys, the first operation cost of such operations is typically over $ 4.5 ten thousand and the second operation cost over $ 7.4 ten thousand, which places a burden on the patient. Therefore, in order to prevent the material separation problem due to the stress shielding phenomenon, a new concept of a high-physical biomaterial is required in the development of an artificial bone.

[ summary of the invention ]

[ problem to be solved ]

The present invention has been made to solve the above problems by providing a new concept of nanocomposite material having excellent properties of high strength, high toughness, and low elastic modulus by preparing the new concept of nanocomposite material using boron nitride material having excellent properties based on a simulated natural structure, such as a simulated pearl layer structure.

[ MEANS FOR SOLVING PROBLEMS ] A method for solving the problems

The nanocomposite material of the present invention comprising Boron Nitride Nanoplates (BNNPs) comprises: boron Nitride nanoplates (BNNP, Boron Nitride nanoplates); comprises anda polymer functional group of a side chain structure combined with the boron nitride nano plate; and from NH groups, NH₂A linear polymer of one or more functional groups selected from the group consisting of a group, an OH group and a COOH group, wherein the functional groups crosslink the boron nitride nanoplate monomer bonded to the polymer functional group.

According to an embodiment of the present invention, the polymer functional group may be selected from the group consisting of NH group, NH₂A polymer material having one or more functional groups selected from the group consisting of a group, an OH group and a COOH group.

According to an embodiment of the present invention, the polymer functional group may include one or more selected from the group consisting of Hyperbranched polyglycidyl ether (HPG), Branched Polyglycerol (PG), Hyperbranched polyethyleneimine (polyethyleneimine), and Branched polyethyleneimine (Branched polyethyleneimine).

According to an embodiment of the present invention, when the polymer functional group may include one or more selected from Hyperbranched polyglycolels (Hyperbranched polyglycolels) or Branched polyglycerols (Branched polyglycoleines), the linear polymer includes a polymer material including NH group, NH group₂A group or a functional group of both.

According to an embodiment of the present invention, the linear polymer may include one or more selected from the group consisting of Gelatin (Gelatin), Collagen (Collagen), polyethyleneimine (polyethyleneimine), 1,6-nylon (1,6-nylon), polyvinylamine (polyvinylamine), and polystyrene (polyaminostyrene).

According to an embodiment of the present invention, when the high molecular functional group may include Hyperbranched polyethyleneimine (hyper Branched polyethyleneimine) or Branched polyethyleneimine (Branched polyethyleneimine), the linear polymer may include a high molecular material including a functional group of OH group, COOH group, or both.

According to an embodiment of the present invention, the linear polymer may include one or more selected from the group consisting of polyvinyl alcohol (PVA), Polylactic acid (PLA), Polyglycolide (PGA), Polycaprolactone (PCL), polybutylene succinate (PBS), and Polyethylene Terephthalate (PET).

According to an embodiment of the present invention, the nanocomposite material may be in the form of a layered aggregate of the boron nitride nanoplate monomers combined with the polymer functional group as a simulated natural structure.

According to an embodiment of the present invention, the crosslinking between the boron nitride nano-plate monomers binding the high molecular functional group may be performed by one or more selected from the group consisting of hydrogen bonding, electrostatic interaction, and van der waals interaction.

According to an embodiment of the present invention, the polymer functional group may account for 0.1 wt% to 50 wt% relative to the total weight of the boron nitride nano plate monomer.

According to an embodiment of the present invention, the linear polymer may be present in an amount of 0.1 to 50 wt% relative to the total weight of the nanocomposite.

According to an embodiment of the present invention, the boron nitride may have a hexagonal crystal (hexagonal) structure.

According to an embodiment of the present invention, the thickness of the boron nitride nano-plate may be 10nm or less.

The invention relates to a method for preparing a nano composite material containing Boron Nitride Nano Plates (BNNP), which comprises the following steps: mechanically stripping Boron Nitride and preparing a Boron Nitride nano-plate (Boron Nitride nanoplatlet); bonding Hyperbranched polyglycidyl ether (HPG) functional groups to the boron nitride nanoplates by self-assembly, thereby forming boron nitride nanoplate monomers; mixing the formed boron nitride nano-plate monomer with a monomer containing NH group and NH₂Mixing a linear polymer of one or more functional groups selected from the group consisting of OH group and COOH groupCombining to form a mixed dispersion; the mixed dispersion was Vacuum filtered (Vacuum filtration).

According to an embodiment of the present invention, the step of preparing a Boron Nitride nanoplate (Boron Nitride nanoplate) may include the steps of: from the boron nitride; and one or more selected from the group consisting of basic materials are charged into a container and ball-milled.

According to an embodiment of the present invention, the bonding between the respective monomers of the boron nitride nano-plate and the bonding between the monomers of the boron nitride nano-plate and the linear polymer may be performed by one or more selected from the group consisting of hydrogen bonding, electrostatic interaction, van der waals interaction.

[ Effect of the invention ]

According to an embodiment of the present invention, it is possible to provide a nanocomposite material that is harmless to the human body and has excellent properties of high strength, high toughness, and a low elastic modulus. In addition, according to an embodiment of the present invention, a new concept of nanocomposite material having good mechanical properties such as high tensile strength, toughness, elastic modulus, etc. and a method for preparing the same are provided by applying a simulated natural structure such as a simulated pearl layer structure to a hexagonal crystal boron nitride material to further improve the mechanical properties of the hexagonal crystal boron nitride nanoplate. Such nanocomposites can be used in a variety of applications, including artificial bone, as well as ceramic materials requiring high mechanical properties.

[ description of the drawings ]

Fig. 1 is a drawing schematically showing the structure of a boron nitride nanoplate monomer formed by bonding a polymer functional group including a side chain structure to a boron nitride nanoplate according to an embodiment of the present invention.

Fig. 2 is a conceptual diagram illustrating a process of forming a nanocomposite including a boron nitride nanoplate according to an embodiment of the present invention.

Fig. 3 is a conceptual diagram illustrating the principle of hydrogen bonding, electrostatic interaction, and van der waals bonding between each boron nitride nanoplate monomer and a linear polymer according to an embodiment of the present invention.

Fig. 4 is a conceptual diagram showing a process for preparing boron nitride nanoplates-e-hyperbranched polyglycidyl ether (BNNP-e-HPG) by a grafting process according to an embodiment of the present invention.

FIG. 5 is a conceptual diagram showing the process of forming a pseudo-nacreous layered structure from a mixed uniform dispersion of boron nitride nano-plate-e-hyperbranched polyglycidyl ether-Gelatin (BNNP-e-HPG-Gelatin) according to an embodiment of the present invention by vacuum filtration.

Fig. 6a and 6b are Scanning Electron Microscope (SEM) photographs showing layered microstructures according to comparative examples and examples of the present invention.

Fig. 7a and 7b are Scanning Electron Microscope (SEM) photographs that may specifically confirm a simulated nacreous layered microstructure formed according to an embodiment of the present invention.

Fig. 8 is a graph showing the evaluation of tensile strength of nanocomposites formed according to the examples of the present invention and comparative examples.

Fig. 9a to 9c are graphs comparing various mechanical properties of the nanocomposites formed in the examples of the present invention and the comparative examples.

Fig. 10 is a graph showing a self-assembly process of a material formed at each step according to an embodiment of the present invention by infrared spectroscopic analysis, and a conceptual diagram of an internal structure of the material formed at each step.

Figure 11 is a TGA plot analyzing the composition and elemental composition of the material formed in each step according to an embodiment of the present invention.

Fig. 12 is an XPS graph analyzing the composition and elemental composition of a material formed in each step according to an embodiment of the present invention.

[ detailed description ] embodiments

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.

Various modifications may be made to the embodiments described below. It should be understood that the following examples are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives thereto.