지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1999.6
- 수록면
- 333 - 337 (5page)
이용수
초록· 키워드
오류제보하기
Sizing development and retention mechanism in rosin soap size-alum systems were studied. Rosin size and aluminum contents in hand sheets, which were prepared under various conditions, were determined by X-ray fluorescence analysis and pyrolysis-gas chromatography, respectively. ¹³C-labeled palmitic acid potassium salt was used as a model of rosin soap size, and chemical structures of size components in hand sheets were analyzed by solid-state ¹³C-NMR. The relationships among sizing degree, size retention and aluminum content in handsheets were obtained in terms of various handsheetconditions. Especially, most aluminum compounds originating from alum added to pulp suspensions are immediately adsorbed on pulp fibers and form cationic sites. Anionic rosin size components are then adsorbed on the cationic sites. When the ¹³C-labled palmitic acid soap size was used in handsheet-making, calcium palmitate was present as a major component in the handsheets. Molecules of free palmitic acid and aluminum palmitate were present as minor components. Formation of aluminum palmitate must be significant for size retention at the wet-end. However, it is not plausible that only aluminum palmitate molecules present in the handsheets as a quite minor component govern overall sizing performance. Molecules of calcium palmitate and free palmitic acid as well as aluminum palmitate probably behave as hydrophobic compounds in the handsheets, and contribute to sizing performance.
목차
ABSTRACT
INTRODUCTION
EXPERIMENTAL
RESULTS AND DISCUSSION
REFERENCES
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