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산처리 옥수수 전분을 이용한 cyanoethyl starch 의 제조 특성
조용민,신윤섭,정문기 한국공업화학회 1998 응용화학 Vol.2 No.1
In order to develop modified starch using reinforced corrugating medium, this study carried out to decrease reaction time and simplify process cyanoethylation of starch after acid treatment of native corn starch. Native corn straches(81g oven dried) were reacted with 150mL of 5% aqueous hydrochloric acid at 40℃ for 30minutes. Acid treated starches(ATS) were cyanoethylated to the 0.1 to 0.4 ratios AN/ATS under alkali condition(pH 12) at 40℃. The degree of substitution(DS) of cyanoethylated starches was 0.003∼0.019 with reaction times(30, 60 and 120 minutes). The preparation of handsheets has been with 1%, 2% and 3% of CES add levels with DS, respectively. The strength properties of handsheets added CES showed a tendency to increase in comparison with untreated handsheet, especially, the compression strength(ring crush) or handsheets was highest in 3% add level of DS 0003 CES.
골심지의 강도향상을 위한 KOCC 와 KONP 의 배합과 숙성처리 효과
조용민,신윤섭,정문기,신필수,정세화 한국공업화학회 1999 응용화학 Vol.3 No.1
This study were carried out to investigate the effect of mixture ratio and caustic soaking treatment of KOCC and KONP for strength improvement of corrugating medium. Test results with caustic soaking treatment have improved dewatering resistance and strength(ring crush), and decreased ash content. The drainage of stock after soaking has decreased from 20% to 40%, but the freeness had shown a high tendency to increase mixture ratio of KONP. The ash of stock after soaking decreased 20% more than the untreated KOCC and KONP to be not related to mixture ratio of KOCC. In the case of ring crush, it was above 12kgf·㎡/g after the mixture ratio of 7:3, and had shown a tendency to increase above 28% and to increase 50% in comparison with the untreated KOCC in the mixture ratio of 5:5.
부유부상 오존처리에 의한 국산 폐골판지(KOCC) 물성향상
조용민,신윤섭,서경원,신필수,이용무 한국공업화학회 2000 한국공업화학회 연구논문 초록집 Vol.2000 No.1
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