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杨木单板漂白工艺研究 总被引:2,自引:0,他引:2
利用正交试验方法对杨木单板进行漂白工艺试验,探讨漂白剂、预处理工艺、主漂工艺、护漂工艺对漂白质量的影响,得出了较佳的工艺路线和技术参数,为杨木单板进一步加工利用提供参考。 相似文献
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在桦木单板漂白的基础上,考察添加助剂种类、用量以及处理方式对单板漂白效果及漂后单板耐光性的影响.结果表明:助剂的使用不影响单板漂白,单板可以获得较高白度,同时能够减缓光变色引起的白度下降的趋势;漂洗阶段添加浓度为0.4%的苯骈三唑,漂后单板的耐光性能较为理想. 相似文献
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芦苇/杨木混合浆的改良漂白 总被引:3,自引:0,他引:3
在实验室内对芦苇/杨木混合浆按不同的漂白流程进行处理。在CEH基准漂白流程加入过氧化氢,改善了最终产品的漂白效果。在实验室取得了较好的效果后,进行了工厂试验,并得到了与实验室类似的效果。过氧化氢强化的漂白流程现已投入正常连续运行。其优点是提高了漂浆的白度和白度稳定性。漂白车间的其他条件和总漂白成本不变。 相似文献
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该实验探讨了在杨木碱性过氧化氢机械浆(APMP)漂白中加入尿素对纸浆ISO白度和打浆性能的影响以及在尿素存在的情况下过氧化氢(H2O2)漂白的最佳工艺。结果表明,加入尿素能提高纸浆白度,并且对纸浆的物理强度没有明显的影响,同时能降低生产成本和减轻后续处理的负担。 相似文献
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机械浆的高白度漂白试验李井宏,陈霞,刘海江吉林纸业股份有限公司132002关键词机械浆,H_2O_2,漂白,高白度,杨木为了利用机械磨木浆(GP)生产高白度纸,我们对杨木机械磨木浆进行了高白度漂白的研究。1试验方法1.1浆料打浆度70°SR,原浆白度5... 相似文献
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以双氧水为漂白主剂,利用不同的漂白配方对变色柞木刨切薄木进行漂白试验。在适宜的漂白温度下,以双氧水浓度、硅酸钠浓度、漂白时间为考查因素进行正交试验,并对漂白后柞木刨切薄木的色差和白度进行检测和分析,结果表明,优化漂白工艺为双氧水浓度3%,硅酸钠浓度0.7%,常温下漂白30min,浴比为10:1,漂白溶液pH值为10。 相似文献
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Microwave irradiation was used to reduce consumption of energy and time during bleaching of wool fabrics with hydrogen peroxide. The effect of some reaction conditions; viz. hydrogen peroxide concentration, treatment time, presence of stabilizer, on degree of whiteness imparted to bleached wool, was studied systematically. Comparative study between bleaching of wool using microwave irradiation and conventional heating was undergone. The effect of bleaching of wool on its morphological structure was assigned by scanning electron microscopy. The change in some chemical and physicomechanical characteristics of bleached wool was monitored; namely whiteness index, alkali solubility, wettability, critical surface area, tensile strength, and elongation at break, of the treated as well as untreated fabrics were measured. The microwave-assisted bleaching of wool resulted in improved degree of whiteness comparable to that is obtained using conventional heating method. However, the microwave-assisted bleached wool shows lower degree of deterioration than that of conventionally bleached wool. The COD and BOD of the wool bleaching effluents were determined. 相似文献
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分别采用双氧水、双氧水/四乙酰乙二胺(TAED)和保险粉对丙烯腈基酪素蛋白复合纤维进行漂白,比较了三种漂白剂漂白后纤维的白度、失重率、酸性染料可染性、化学和结晶结构。研究表明,采用保险粉在中性条件下漂白,可改善纤维白度,酪素蛋白没有流失,可染性不受影响;双氧水/TAED漂白,其纤维白度最高,酪素蛋白的流失极低,但可染性受到一定程度的影响;双氧水碱性漂白引起酪素蛋白的大量流失,明显降低了可染性,但纤维因聚丙烯腈变性而泛黄。三种漂白方法均未改变纤维的主体结晶结构。 相似文献
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采用双氧水/漂白剂PD—CC双漂法对大豆蛋白纤维漂白,白度可比双氧水单漂法和过醋酸单漂法提高10%,而且漂白后,大豆蛋白纤维的主体结构未发生变化,大豆蛋白含量微降低.能充分体现大豆蛋白纤维本身所固有的特性。 相似文献
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《Journal of Natural Fibers》2013,10(2-3):69-81
SUMMARY In this paper the effect of enzymatic bioscouring on the bleaching and dyeing of flax fibres was studied in comparison with conventional alkaline scouring. Enzymatic bioscouring was performed with a commercial multi-enzyme system consisting of pectinases, hemicellulases and cellulases. The enzyme and alkaline scoured flax fibres were subsequently oxidatively bleached with hydrogen peroxide and dyed with direct dye C.I. Direct Red 80 under the same conditions. The efficiency of both the scouring and bleaching processes was evaluated by weight loss and the whiteness of the bleached samples was determined according to CIE formula. The exhaustion profile of the used dye was followed on-line during the dyeing process using absorbance measurement. The colours of bleached and dyed samples were evaluated using CIELAB colour values. The residual pretreatment and dyeing baths were ecologically analysed with COD, TOC and BOD5. The obtained results indicate that enzymatic scouring provides a lower weight loss, a higher degree of whiteness, comparable dyeing properties and is more environmentally friendly. 相似文献
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研究了稻草高得率浆通过硼氢化钠预处理过氧化氢漂白工艺过程,发现此漂白方法可以适当提高稻草过氧化氢漂白高得率浆白度,为国内稻草漂白高得率浆生产提高了技术支撑。实验得出最佳漂白工艺为:预处理硼氢化钠用药量3%、处理时间2min,漂白过氧化氢用药量8%,氢氧化钠用药量3%,漂白时间60min,漂白温度85℃。在上述工艺条件下漂白得出的浆料白度为49%ISO,比未预处理过氧化氢漂白白度提高了4%。 相似文献
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生态漂白剂过醋酸漂白亚麻织物的研究 总被引:11,自引:4,他引:11
NaClO用作亚麻织物的漂白剂会形成AOX,影响环境,过醋酸(PAA)以及其较高的氧化电位及无公害性,被认为是有望替代NaClO的“生态漂白剂”。本课题系统地研究了浓度,pH值,温度,时间等工艺参数对过酸漂白亚麻织物的影响。用正交设计法确定了最佳的漂白工艺条件,结果表明,过醋酸漂白亚麻织物与氯-氧漂白度相当;其半制品用某些活性染料染色后,表现深度好于氯-氧漂,染色牢度令人满意。 相似文献