[논문]실란 커플링제 옥틸트리메톡시실란에 의해 표면 개질된 탄산칼슘 나노입자가 에멀젼 및 기포 안정성에 미치는 영향

임종주; 박기호; 이정민; 신희동

doi:10.14478/ace.2022.1062

실란 커플링제 옥틸트리메톡시실란에 의해 표면 개질된 탄산칼슘 나노입자가 에멀젼 및 기포 안정성에 미치는 영향
Effect of Surface Modification of Calcium Carbonate Nanoparticles by Octyltrimethoxysilane on the Stability of Emulsion and Foam 원문보기

공업화학 = Applied chemistry for engineering, v.33 no.4, 2022년, pp.386 - 393

임종주 (동국대학교 화학공학과) , 박기호 (동국대학교 화학공학과) , 이정민 (동국대학교 화학공학과) , 신희동 (동국대학교 화학공학과)

초록
AI-Helper

본 연구에서는 실란 커플링제 옥틸트리메톡시실란(octyltrimethoxysilane, OTMS)을 사용하여 친수성 탄산칼슘(CaCO₃) 나노입자의 표면을 개질하였으며, OTMS에 의한 CaCO₃ 나노입자의 표면 개질은 FT-IR, DSC, XRD XPS 및 TGA 분석을 통하여 확인하였다. 또한 부유 시험과 접촉각 측정을 통하여 OTMS 농도가 CaCO₃ 나노입자의 표면 소수성 변화에 미치는 영향에 관하여 살펴보았다. 부유 시험 결과에 따르면 1 wt% OTMS 농도 조건에서 측정한 active ratio 값이 97.0 ± 0.5%로서, OTMS가 CaCO₃ 나노입자 표면을 매우 효율적으로 소수화 개질하는 실란 커플링제임을 알 수 있었다. 또한 OTMS로 개질된 CaCO₃ 나노입자 1 wt%를 함유하는 수용액에 대한 기포 안정성 측정 결과, OTMS 농도가 1 wt%인 조건에서 가장 안정한 기포가 생성되며, 접촉각은 91.8 ± 0.7°임을 확인하였다. 또한 동일한 1 wt% OTMS 농도 조건에서 에멀젼 입자 크기가 가장 작은 안정한 상태의 에멀젼이 형성됨을 확인하였다. 이러한 결과들은 OTMS로 개질된 CaCO₃ 나노입자가 다양한 산업 응용 분야에서 기포 안정화제 및 에멀젼 유화제로서 적용이 가능함을 의미하는 것이다.

Abstract ▼ AI-Helper

In this study, the surface modification of calcium carbonate (CaCO3) nanoparticles by a silane coupling agent, octyltrimethoxysilane (OTMS), was investigated and characterized using Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) analysis. Both floating tests and contact angle measurements were also conducted to study the effect of OTMS concentration on the hydrophobicity of CaCO3 nanoparticles. It was found that the active ratio for the CaCO3 nanoparticles modified by 1 wt% of OTMS was 97.0 ± 0.5%, indicating that OTMS is a very effective silane coupling agent in enhancing the hydrophobicity of the CaCO3 nanoparticle surface. The most stable foam was generated with 1 wt% of CaCO3 nanoparticles in aqueous solutions at 1 wt% of OTMS, where the contact angle of water was found to be 91.8 ± 0.7°. It was also found that the most stable emulsion drops were formed at the same OTMS concentration. These results suggest that CaCO3 nanoparticles modified by a silane coupling agent OTMS are a powerful candidate for a foam stabilizer or an emulsifier in many industrial applications.

주제어

표/그림 (12)

그림 Scheme 1. Surface modification of CaCO₃ nanoparticles with OTMS.
그림 Figure 1. FT-IR spectra obtained at 25 °C; (a) pure CaCO₃ nanoparticles, (b) CaCO₃ nanoparticles modified by OTMS.
그림 Figure 2. DSC spectra of CaCO₃ nanoparticles modified by OTMS.
그림 Figure 3. XRD spectra of pure CaCO₃ nanoparticles and CaCO₃ nanoparticles modified by OTMS.
그림 Figure 4. XPS spectra of CaCO₃ nanoparticles modified by OTMS.
그림 Figure 5. TGA curves of CaCO₃ nanoparticles modified by OTMS.
표 Table 1. XPS Analysis Data for CaCO3 Nanoparticles Modified by OTMS at 25 °C
표 Table 2. The Number of Hydroxyl Group Per Unit Area of CaCO₃ Nanoparticles Replaced by OTMS, Calculated from TGA Measurement
그림 Figure 6. Electrical conductivity measurement for emulsions prepared using 1:1 volume ratio of n-decane and aqueous phase containing 2 wt% of CaCO₃ nanoparticle dispersion.
그림 Figure 7. Optical and high resolution fluorescence microscopy images of emulsions as a function of OTMS concentration (wt%) where emulsion was prepared using 1:1 volume ratio of n-decane and aqueous phase containing 2 wt% of CaCO₃ nanoparticle; (a) 0, (b) 1, (c)3, (d) 5 and (e) 15.
표 Table 3. Active Ratio, Contact Angle, Diameter of Emulsion Drop and Foam Stability Measured for CaCO₃ Nanoparticles Modified by OTMS at 25 °C
그림 Figure 8. Optical and high resolution fluorescence microscopy images of foams as a function of OTMS concentration (wt%) where the foams were initially generated by adding 1 wt% of AO32 surfactant into 1 wt% of CaCO₃ nanoparticle dispersion; ; (a) 0, (b) 1, (c) 3, (d) 5 and (e) 15.

참고문헌 (34)

Z. G. Cui, Y. Z Cui, C. F Cui, Z. Chen, and B. P. Binks, Aqueous foams stabilized by in situ surface activation of CaCO 3 nano particles via adsorption of anionic surfactant, Langmuir, 26, 12567-12574 (2010).

상세보기
K. Premphet and P. Horanont, Phase structure of ternary polypropylene/elastomer/filler composites: Effect of elastomer polarity Polymer, 41, 9283-9290 (2000).

상세보기
C. Wang, Y. Sheng, H. Bala, X. Zhao, J. Zhao, X. Ma, and Z. Wang, A novel aqueous-phase route to synthesize hydrophobic CaCO 3 particles in situ, Mater. Sci. Eng. C, 27, 42-45 (2007).
M. A. Osman and U. W. Suter, Surface treatment of calcite with fatty acids: structure and properties of the organic monolayer, Chem. Mater., 14, 4408-4415 (2002).

상세보기
S. Mihajlovic, A. Dakovic, Z. Sekulic, V. Jovanovic, and D. Vucinic, Influence of the modification method on the surface adsorption of stearic acid by natural calcite, J. Serb. Chem. Soc., 67, 1-19 (2009).
Z. Demjen, B. Pukanszky, and J. Nagy, Possible coupling reactions of functional silanes and polypropylene, Polymer, 40, 1763-1773 (1999).

상세보기
E. Fekete and B. Pukanszky, Surface coverage and its determination: Role of acid-base interactions in the surface treatment of mineral fillers, J. Colloid Interface Sci., 194, 269-275 (1997).

상세보기
G. S. Deshmukh, S. U. Pathak, D. R. Peshwe, and J. D. Ekhe, Effect of uncoated calcium carbonate and stearic acid coated calcium carbonate on mechanical, thermal and structural properties of poly(butylene terephthalate) (PBT)/calcium carbonate composites, Bull. Mater. Sci., 33, 277-284 (2010).

상세보기
Y. Yin and X. Wang, Wet surface modification of light calcium carbonate powder by aluminate coupling agent, Adv. Mater. Res., 79-82, 1967-1970 (2009).
J. Liao, G. Du, X. Qiao and D. Hao, Surface modification of diatomite by stearic acid and its effects on reinforcing for natural rubber/styrene butadiene rubber blend, J. Chin. Ceram. Soc., 39, 641-645 (2011).
K. Esumi and M. Ueno, Structure-performance relationships in surfactant, Marcel Dekker, New York (1997).
I. Grosse and K. Estel, Thin surfactant layers at the solid interface, Colloid Polym. Sci., 278, 1000-1006 (2000).

상세보기
F. Tiberg, J. Brinck, and L. Grant, Adsorption and surface-induced self-assembly of surfactants at the solid-aqueous interface, Curr. Opin. Colloid Interface Sci., 4, 411-419 (1999).

상세보기
P. Somasundaran and L. Huang, Adsorption/aggregation of surfactants and their mixtures at solid-liquid interfaces, Adv. Colloid Interface Sci., 88, 179-208 (2000).

상세보기
E. M. Song, D. W. Kim, B. J. Kim, and J. C. Lim, Surface modification of CaCO 3 nanoparticles by alkylbenzene sulfonic acid surfactant, Colloids Surf. A, 461, 1-10 (2014).
E. M. Song, D. W. Kim, and J. C. Lim, Effect of adsorption of laureth sulfonic acid type anionic surfactant on the wetting property of CaCO 3 substrate, J. Ind. Eng. Chem., 28, 351-358 (2015).

상세보기
D. W. Kim, J. Y. Lee, S. M. Lee, and J. C. Lim, Surface modification of calcium carbonate nanoparticles by fluorosurfactant, Colloids Surf. A, 536, 213-223 (2018).
J. Y. Lee, S. H. Jo, and J. C. Lim, Effect of surface modification of CaCO 3 nanoparticles by a silane coupling agent methyltrimethoxysilane on the stability of foam and emulsion, J. Ind. Eng. Chem., 74, 63-70 (2019).

상세보기
Z. Y. Yang, Y. J. Tang, and J. H. Zhang, Surface modification of CaCO 3 nanoparticles with silane coupling agent for improvement of the interfacial compatibility with styrene-butadiene rubber (SBR) latex, Chalcogenide Lett., 10, 131-141 (2013).
N. Shimpi, A. Mali, D. P. Hansora, and S. Mishra, Synthesis and surface modification of calcium carbonate nanoparticles using ultrasound cavitation technique, Nanosci. Nanoeng., 3, 8-12 (2015).

상세보기
Y. J. Lee, K. H. Park, and J. C. Lim, Effect of surface modification of CaCO 3 nanoparticles by a silane coupling agent propyltrimethoxysilane on the stability of emulsion and foam, Appl. Chem. Eng., 31, 49-56 (2020).
S. Mishra, A. Chatterjee, and R. Singh, Novel synthesis of nano-calcium carbonate (CaCO 3 )/polystyrene(PS) core-shell nanoparticles by atomized microemulsion technique and its effect on properties of polypropylene(PP) composites, Polym. Adv. Technol., 22, 2571-2582 (2011).

상세보기
E. Mavropoulos, A. M. Costa, L. T. Costa, C. A. Achete, A. Mello, J. M. Granjeiro, and A. M. Rossi, Adsorption and bioactivity studies of albumin onto hydroxyapatite surface, Colloids Surf. B, 83, 1-9 (2011).
S. Ghosh, S. K. Goswami, and L. J. Mathias, Surface modification of nano-silica with amides and imides for use in polyester nanocomposites, J. Mater. Chem. A, 1, 6073-6080 (2013).

상세보기
S. Ek, A. Root, M. Peussa, and L. Niinisto, Determination of the hydroxyl group content in silica by thermogravimetry and a comparison with 1H MAS NMR results, Thermochim. Acta, 379, 201-212 (2001).
B. P. Binks and S. O. Lumsdon, Influence of particle wettability on the type and stability of surfactant-free emulsions, Langmuir, 16, 8622-8631 (2000).

상세보기
B. P. Binks and J. A. Rodrigues, Double inversion of emulsions by using nanoparticles and a di-chain surfactant, Angew. Chem. Int. Ed., 46, 5389-5392 (2007).
D. E. Tambe and M. M. Sharma, Factors controlling the stability of colloid-stabilized emulsions: I. An experimental investigation, J. Colloid Interface Sci., 157, 244-253 (1993).

상세보기
Z. G. Cui,, C. F. Cui, Y. Zhu, and B. P. Binks, Multiple Phase inversion of emulsions stabilized by in situ surface activation of CaCO 3 nanoparticles via adsorption of fatty acids, Langmuir, 28, 314-320 (2012).

상세보기
B. P. Binks, Particles as surfactants-similarities and differences, Curr. Opin. Colloid Interface Sci., 7, 21-41 (2002).

상세보기
E. Rio, W. Drenckhan, A. Salonen, and D. Langevin, Unusually stable liquid foams, Adv. Colloid Interface Sci., 205, 74-86 (2014).

상세보기
P. D. I. Fletcher and B. L. Holt, Controlled silanization of silica nanoparticles to stabilize foams, climbing films, and liquid marbles, Langmuir, 27, 12869-12876 (2011).

상세보기
U. T. Gonzenbach, A. R. Studart, E. Tervoort, and L. J. Gauckler, Ultrastable Particle-stabilized foams, Angew. Chem. Int. Ed., 45, 3526-3530 (2006).
B. P. Binks and T. S. Horozov, Aqueous foams stabilized solely by silica nanoparticles, Angew. Chem. Int. Ed., 117, 3788-3791 (2005).

저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증