아민화 전처리 후 제조한 셀룰로오스 나노섬유의 로진 보류향상제 적용 특성

다국어 초록 (Multilingual Abstract)

Cellulose nanofibers(CNFs) are an eco-friendly polymer material that can be obtained from nature. It is biodegradable, has high tensile and bursting strengths and possesses a variety of properties, including morphology, a high specific surface area and thermomechanical performance. These characteristics allow CNFs to be utilized in a variety of industries. CNFs are manufactured through mechanical and chemical pretreatment processes followed by nanofibrillation. Various performances of cellulose can be improved through chemical pretreatment.
In this study, amination was performed using GMA depending on the degree of substitution of cellulose. After cationizing cellulose, CNFs were prepared using a grinder and a high-pressure homogenizer. By measuring zeta potential and physical properties for each degree of substitution, it evaluated its applicability as a rosin retention agent to replace alum used in the paper industry.
As the degree of substitution increased, the zeta-potential and viscosity also improved. Additionally, the Stöckigt sizing degree and surface contact angle of water-based paper obtained by preparing aminated CNFs with rosinsizing showed higher values compared to untreated CNFs. Therefore, it was confirmed that aminated CNFs were beneficial in retaining rosin.

목차 (Table of Contents)

• Abstract ⅲ
• List of tables ⅴ
• List of figures ⅵ
• Ⅰ. 서 론 1
• Ⅱ. 연 구 사 4
• 2.1 셀룰로오스 나노섬유 4
• 2.2 셀룰로오스 나노섬유의 화학적 전처리 6
• 2.2.1 카르복시메틸화 전처리 6
• 2.2.2 TEMPO-산화 전처리 7
• 2.2.3 사차 아민화 전처리 9
• 2.3 보류제 10
• Ⅲ. 재료 및 방법 12
• 3.1 공시 재료 12
• 3.2 실험방법 13
• 3.2.1 아민화 셀룰로오스 제조 13
• 3.2.2 셀룰로오스 나노섬유 제조 13
• 3.2.3 펄프의 고해 16
• 3.2.4 수초지 제조 16
• 3.3 분석방법 17
• 3.3.1 아민화 전처리 셀룰로오스 나노섬유 분석 17
• 3.3.1.1 Zeta-potential 측정 17
• 3.3.1.2 보수도 측정 17
• 3.3.1.3 점도 분석 18
• 3.3.2 수초지 로진사이즈 보류 분석 19
• 3.3.2.1 스테키히트 사이즈도 19
• 3.3.2.2 접촉각 19
• 3.3.2.3 FT-IR 분석 19
• Ⅳ. 결과 및 고찰 21
• 4.1 아민화 전처리에 따른 CNF의 제타전위에 미치는 영향 21
• 4.2 아민화 전처리 셀룰로오스 나노섬유 물성 23
• 4.3 아민화 전처리 CNF 및 로진 사이즈제 첨가 수초지 내수성 및 보류 특성 26
• Ⅴ. 결 론 31
• 인용문헌 33