[논문]붕산을 첨가한 폴리비닐알콜/디메틸술폭시드 용액의 겔화 거동에 관한 유변학적 고찰

이은정; 김동준; 채동욱; 김병철

doi:10.12772/tse.2018.55.152

붕산을 첨가한 폴리비닐알콜/디메틸술폭시드 용액의 겔화 거동에 관한 유변학적 고찰
Rheological Characterization of the Gelation Behavior of PVA Solutions in DMSO Containing BA

한국섬유공학회지 = Textile science and engineering, v.55 no.3, 2018년, pp.152 - 157

이은정 (한양대학교 유기나노공학과) , 김동준 (LG화학 EP 소재개발센터) , 채동욱 (경북대학교 섬유공학과) , 김병철 (한양대학교 유기나노공학과)

Abstract ▼ AI-Helper

The gelation behavior of poly(vinyl alcohol) (PVA) solutions in dimethyl sulfoxide (DMSO) containing boric acid (BA, $H_3BO_3$) under shear stress was rheologically investigated in terms of temperature and molecular weight of PVA. Time-dependent rheological properties of the solutions were analyzed to determine the effects of stress on the gelation mechanism. The solutions of low weight-average molecular weight ($M_w=31,000-50,000$) PVA showed more noticeable temperature-dependent viscosity changes than those of high weight-average molecular weight ($M_w=165,000-186,000$) PVA. The viscosity increase caused by stress indicated that the formation of the gel structure was promoted by stress. In time sweep experiments, all the PVA solutions showed stress-dependent rheological responses except for the high $M_w$ PVA solutions at $30^{\circ}C$. The viscosities of the solutions remained constant over the observed shearing time, indicating the formation of an irreversible gel. The effects of stress history were reconfirmed by the results of frequency sweep experiments. Antecedent shearing gave rise to many different time-dependent rheological responses. At $60^{\circ}C$, both low and high $M_w$ PVA solutions had loss tangent values (tan ${\delta}$) less than 1. Furthermore, the formation of gel structures increased the relaxation time (${\lambda}$) by up to 10 s.

주제어

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

However little literature is available on the gelation behavior of PVA solutions in DMS^o Containing BA under stress. This study investigated the gelation behavior of PVA solutions in DMS^o Containing BA under shear stress rheologically in terms of temperature and molecular weight of PVA.

가설 설정

However, the gel structure gets softer at 60 ^o C and it has room for further gelation by shearing as shown in Figure 4(a). Referring to Figure 1(b), temperature effects alone do not really bring about the gel formation. Consequently, these results indicate that the combined effects of stress and temperature drastically change the phase of the solutions.

제안 방법

measurement (T3). In order to observe the relationship between stress history and relaxation behavior, a relaxation time of 5 minutes and 10 minutes was set for time sweep measurement. Since gelation proceeds by stress, a relaxation time of 10 minutes was set after T2 measurement.
It was investigated the gelation behavior of PVA solutions in DMS^o Containing BA under shear stress rheologically in terms of temperature and molecular weight of PVA. Stressing and heating promoted the gelation of PVA solutions in DMS^o Containing BA.
01 to 200 rad/s. The first experiment coded fresh was carried out without stress history and the other experiment, sheared, was measured with the preceded time-sweep samples to examine the effects of stress history.

성능/효과

PVA samples were denoted as Mw, LMW-PVA (Mw=31,000− 50,000, degree of hydrolysis=98%+) and HMW-PVA (Mw=165,000−186,000, degree of hydrolysis=99%+).

참고문헌 (17)

P. Song, Z. Xu, Y. Lu, and Q. Guo, "Bioinspired Strategy for Tuning Thermal Stability of PVA via Hydrogen-Bond Crosslink", Compos. Sci. Technol., 2015, 118, 16-22.

상세보기
V. J. Addiel, T. Motohiro, and K. Takaomi, "Ultrasound Stimulus Inducing Change in Hydrogen Bonded Crosslinking of Aqueous Polyvinyl Alcohols", Ultrason. Sonochem., 2014, 21, 295-309.

상세보기
M. Rumyantsev, "Influences of Co-Solvent on Hydrogen Bond Reorganization in Ternary Poly(vinyl alcohol) Solutions", Eur. Polym. J., 2013, 49, 2257-2266.

상세보기
W. S. Lyoo, I. S. Seo, B. C. Ji, J. H. Kim, S. S. Kim, H. D. Ghim, B. C. Kim, and J. Lee, "Role of the Stereosequences of Poly(vinyl alcohol) in the Rheological Properties of Syndiotacticity-Rich Poly(vinyl alcohol)/Water Solutions", J. Appl. Polym. Sci., 2003, 88, 1858-1863.

상세보기
W. S. Lyoo, J. H. Kim, J. H. Choi, B. C. Kim, and J. Blackwell, "Role of Degree of Saponification in the Shear-Induced Molecular Orientation of Syndiotacticity-Rich Ultrahigh Molecular Weight Poly(vinyl alcohol)", Macromolecules, 2001, 34, 3982-3987.

상세보기
W. S. Lyoo, B. C. Kim, and W. S. Ha, "Rheological and Rheo- Optical Properties of High Molecular Weight Syndiotactic and Atactic Polyvinylalcohol Solutions", Polym. Eng. Sci., 1997, 37, 1259-1265.

상세보기
S. R. Sudhamani, M. S. Prasad, and K. U. Sankar, "DSC and FTIR Studies on Gellan and Poly(vinyl alcohol) (PVA) Blend Films", Food Hydrocolloids, 2003, 17, 245-250.

상세보기
Z. Zhang and Q. Zhang, "Matrix Tailoring of Engineered Cementitious Composites (ECC) with Non-Oil-Coated, Low Tensile Strength PVA Fiber", Constr. Build. Mater., 2018, 161, 420-431.

상세보기
Z. Ahmad, M. Abbas, I. Gunawan, R. A. Shakoor, F. Ubaid, and F. Touati, "Electro-Sprayed PVA Coating with Texture-Enriched Surface Morphology for Augmented Humidity Sensing", Prog. Org. Coat., 2018, 117, 7-9.

상세보기
J. B. Chang, S. B. Yuk, J. S. Park, and J. P. Kim, "Dichroic and Spectral Properties of Anthraquinone-Based Azo Dyes for PVA Polarizing Film", Dyes Pigm., 2011, 92, 737-744.
X. Wu, A. Liu, W. Wang, and R. Ye, "Improved Mechanical Properties and Thermal-Stability of Collagen Fiber Based Film by Crosslinking with Casein, Keratin or SPI: Effect of Crosslinking Process and Concentrations of Proteins", Int. J. Biol. Macromol., 2018, 109, 1319-1328.

상세보기
H. Wang, T. Shyr, and M. Hu, "The Elastic Property of Polyvinyl Alcohol Gel with Boric Acid as a Crosslinking Agent", J. Appl. Polym. Sci., 1999, 74, 3046-3052.

상세보기
E. J. Lee, K. S. Dan, and B. C. Kim, "Rheological Characterization of Shear-Induced Structural Formation in the Solutions of Poly(vinyl alcohol) in Dimethyl Sulfoxide", J. Appl. Polym. Sci., 2006, 101, 465-471.

상세보기
E. J. Lee and B. C. Kim, "The Effects of Boric Acid on the Rheological Behavior of Time Dependent Structure Formation in PVA/DMSO Solutions", Fiber. Polym., 2013, 14, 2097-2102.

원문보기 상세보기
J. H. Choi, S. W. Ko, B. C. Kim, J. Blackwell, and W. S. Lyoo, "Phase Behavior and Physical Gelation of High Molecular Weight Syndiotactic Poly(vinyl alcohol) Solution", Macromolecules, 2001, 34, 2964-2972.

상세보기
S. I. Song and B. C. Kim, "Characteristic Rheological Features of PVA Solutions in Water Containing Solvents with Different Hydration States", Polymer, 2004, 45, 2381-2386.

상세보기
Y. H. Cho, K. S. Dan, and B. C. Kim, "Effects of Dissolution Temperature on the Rheological Properties of Poly(vinyl alcohol) Solutions in Dimethyl Sulfoxide", Korea-Aust. Rheol. J., 2008, 20, 73-77.

저자의 다른 논문 :

LOADING...

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