KR102328995B1 - 폭발형 나노다이아몬드의 분리 방법 - Google Patents
폭발형 나노다이아몬드의 분리 방법 Download PDFInfo
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/25—Diamond
- C01B32/28—After-treatment, e.g. purification, irradiation, separation or recovery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/36—Adding fluid, other than for crushing or disintegrating by fluid energy the crushing or disintegrating zone being submerged in liquid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
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Abstract
본 발명의 나노다이아몬드 분리방법은 불순물이 혼입할 여지가 있는 무기물의 강산(예를 들면 H2SO4, H2CrO4, HCl, HI 등)이나 알카리금속 및 알카리 토금속,
전이금속 등이 포함된 강염기를 사용하지 않음으로서 종래의 금속 불순물 혼입 문제를 해결할 수 있다.
또한, 본 발명의 분리방법에 의하면 5~50nm 사이즈의 단일입자상 및 복수군집상의 나노다이아몬드 분산액을 제공할 수 있다.
본 발명의 나노다이아몬드는 입자 사이즈가 5~50nm로 균일하고 금속 및 알카리 불순물의 혼입을 억제함으로써 나노다이아모드의 표면에 정량적으로 기능기를 부착을 용이하게 할 수 있도록 하여 IT용 박막의 전구물질, 약물 전달체, 화장료 등에 사용할 수 있다.
Description
도 2 내지 도 13은 실시예 1~8, 비교예 1~4의 분산 용액내에서 나노다이아몬드의 입도 분석을 나타내는 그래프이다.
실험예시 | 평균입자크기(nm) | 중간값 크기(nm) |
입도 분포 | 입자색상 | 불순물 |
실시예1 | 90 | 66.1 | 10~300 | 회색 | 해당사항없음 |
실시예2 | 65 | 46.6 | 18~180 | 흑회색 | 해당사항없음 |
실시예3 | 61 | 47.2 | 18~160 | 흑회색 | 해당사항없음 |
실시예4 | 23 | 18.0 | 7~60 | 흑색 | 해당사항없음 |
실시예5 | 21 | 16.8 | 5~50 | 흑색 | 해당사항없음 |
실시예6 | 28 | 22.3 | 13~70 | 흑색 | 해당사항없음 |
실시예7 | 43 | 29.1 | 10~120 | 흑색 | 해당사항없음 |
실시예8 | 43 | 32.1 | 15~130 | 흑색 | 해당사항없음 |
비교예1 | 85 | 68.7 | 30~230 | 갈회색 | Na 불순물 혼입 |
비교예2 | 75 | 52.1 | 20~220 | 흑회색 | Na 불순물 혼입 |
비교예3 | 174 | 76.6 | 30~700 | 흑회색 | Cl 불순물 혼입 |
비교예4 | 488 | 419.7 | 170~850 | 회색 | 해당사항없음 |
10 : 단일 입자상 나노다이아몬드 20 : 흑연층
30 : 복수 군집상 나노다이아몬드
100 : 응집 DND 입자군
Claims (13)
- 나노다이아몬드 응집체를 탈이온수에 넣어 수화시키는 단계 ;
상기 수용액에 알코올을 첨가하여 혼합용매를 제조하는 단계 ; 및
상기 혼합용매에 초음파를 가하는 분리단계를 포함하고,
상기 알코올은 상기 탈이온수보다 비점이 낮고,
상기 수화단계는 상기 탈이온수가 나노다이아몬드 응집체 내부로 스며드는 단계이고,
상기 분리단계는 상기 나노다이아몬드 응집체 내부에 스며든 혼합용매(탈이온수와 알코올)의 끓음 현상을 상기 초음파로 증가시켜 상기 나노다이아몬드 응집체를 내부에서 파괴하여 분리하는 것을 특징으로 하는 나노다이아몬드 분리방법. - 제 1항에 있어서, 상기 수용액과 혼합용매의 온도는 상온 내지 100℃로 유지하는 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 1항에 있어서, 상기 나노다이아몬드 응집체는 탈이온수 100중량대비 0.1~20중량부로 첨가되는 것을 특징으로 하는 나노다이아몬드 분리방법.
- 삭제
- 제 1항에 있어서, 상기 탈이온수와 알코올은 부피비로 1 : 0.1~20인 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 1항에 있어서, 상기 방법은 상기 혼합용매에 초음파를 가하는 중이나 전· 후에 알카리제 또는 산을 첨가하여 pH를 조절하는 단계를 포함하는 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 6항에 있어서, 상기 산은 무기산 및 유기산 중 금속 및 할로겐원소를 포함하지 않은 산인 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 1항에 있어서, 상기 혼합용매의 pH를 3~12로 증가시키는 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 6항에 있어서, 상기 알카리제는 비금속성 염기인 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 6항에 있어서, 상기 알카리제는 비금속성 아민계 염기인 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 6항에 있어서, 상기 알카리제 투입에 의해 상기 혼합용매의 제타 전위값이 -100~100mV 범위를 가지는 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 1항에 있어서, 상기 초음파의 주파수는 2kHz ~ 40KHz 범위인 것을 특징으로 하는 나노다이아몬드 분리방법.
- 제 1항에 있어서, 상기 초음파를 가하는 단계 후에 분리된 나노다이아몬드 입자를 원심분리기로 회수하는 단계를 추가로 포함하는 것을 특징으로 하는 나노다이아몬드 분리방법.
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PCT/KR2015/012705 WO2016085249A1 (ko) | 2014-11-26 | 2015-11-25 | 폭발형 나노다이아몬드의 분리 방법 |
US15/529,084 US10781106B2 (en) | 2014-11-26 | 2015-11-25 | Method for separating detonation nanodiamonds |
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WO2018152787A1 (zh) * | 2017-02-24 | 2018-08-30 | 深圳先进技术研究院 | 一种超分散纳米金刚石及其制备方法 |
WO2019041093A1 (zh) * | 2017-08-28 | 2019-03-07 | 深圳先进技术研究院 | 一种超分散纳米金刚石分散液及其制备方法和应用 |
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