CAJ | 학술논문

探讨了竹浆粕生产过程中二氧化氯漂白( D1、D2段)的重要性和必要性,D1段和D2段分别研究了ClO2用量、NaOH用量、温度、时间4个因素及ClO2用量单因素对二氧化氯漂白效果的影响,包括α-纤维素、聚戊糖、白度、卡伯值、黏度、灰分等性能,其中D1段分析了白度提高与浆粕α-纤维素、聚戊糖及灰分的关系。结果表明,D1段最优工艺条件为：ClO2用量1.52%且NaOH用量0.76%( NaOH与ClO2质量比1：2),温度75℃,时间120 min,浆质量分数10%。经D1段处理后,竹浆白度提高率达到了78.8%,黏度下降率仅为19.55%,漂白选择性高。在D1段漂白工艺的基础上,确定D2段的ClO2用量0.8%,且漂白时间120 min,漂白温度75℃,浆质量分数10%。浆料白度增加的过程中,一定程度上提高了α-纤维素含量同时降低了聚戊糖及灰分等杂质的含量,达到了调整竹浆粕质量指标和提高反应性能的目的。经含有两段二氧化氯漂白的无元素氯漂白流程处理后,竹浆粕最终白度达到了88.2%(ISO)。
탐토료죽장박생산과정중이양화록표백( D1、D2단)적중요성화필요성,D1단화D2단분별연구료ClO2용량、NaOH용량、온도、시간4개인소급ClO2용량단인소대이양화록표백효과적영향,포괄α-섬유소、취무당、백도、잡백치、점도、회분등성능,기중D1단분석료백도제고여장박α-섬유소、취무당급회분적관계。결과표명,D1단최우공예조건위：ClO2용량1.52%차NaOH용량0.76%( NaOH여ClO2질량비1：2),온도75℃,시간120 min,장질량분수10%。경D1단처리후,죽장백도제고솔체도료78.8%,점도하강솔부위19.55%,표백선택성고。재D1단표백공예적기출상,학정D2단적ClO2용량0.8%,차표백시간120 min,표백온도75℃,장질량분수10%。장료백도증가적과정중,일정정도상제고료α-섬유소함량동시강저료취무당급회분등잡질적함량,체도료조정죽장박질량지표화제고반응성능적목적。경함유량단이양화록표백적무원소록표백류정처리후,죽장박최종백도체도료88.2%(ISO)。
The importance and necessarity of chlorine dioxide bleaching during production of bamboo dissolving pulp were discussed in present study. Effects of ClO2 dosage, NaOH dosage, bleaching temperature and time in D1 stage, and ClO2 dosage in D2 stage on pulp properties, including α-cellulose content, pentosan content, brightness, Kappa number, pulp viscosity and ash content, were examined respectively. The relationships between pulp brightness and α-cellulose, pentosan, ash contents in D1 stage were established. The results showed that the optimal bleaching for preparing bamboo dissolving pulp with chlorine dioxide(D1) were conducted as the pulp was treated by 1. 52% of ClO2 and 0. 76% of NaOH at 75℃ for 120 minutes. The pulp brightness was increased by 78. 8%, and only a 19. 55% of pulp viscosity was observed after D1 stage. The ClO2 dosage in D2 stage was 0. 8%. And the other conditions were as follows:0. 4% NaOH, 75℃ and 120 min, 10% of pulp quality mark. Theα-cellulose content increased with the rise of pulp brightness, meanwhile, accompanying with the decline of pentosan and ash content. This is positive for the quality modification of the obtained bamboo dissolving pulp. After the bleaching by two stages of chlorine dioxide, the brightness of the final bamboo dissolving pulp reached up to 88. 2% (ISO).