本文關(guān)鍵詞：直接染料在水和液氨介質(zhì)中上染苧麻纖維的染色性能研究　出處：《武漢紡織大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 液氨染色 苧麻纖維 直接染料

【摘要】：傳統(tǒng)印染技術(shù)存在環(huán)境污染大,廢水排放量大,且廢水里的有機(jī)物復(fù)雜,不容易清除的問(wèn)題。本課題采用直接藍(lán)71和直接紅23染料在液氨介質(zhì)中對(duì)苧麻散纖維進(jìn)行染色性能研究,并與染料在水介質(zhì)的染色性能進(jìn)行對(duì)比,探究直接染料在液氨介質(zhì)中對(duì)苧麻纖維的染色性能。在水介質(zhì)染色中,在不同的染色溫度、染色時(shí)間、染料濃度和氯化鈉含量的條件下,考察染色條件對(duì)染料上染率、固色效率和耐水洗色牢度的影響;并對(duì)染色過(guò)程中的動(dòng)力學(xué)和熱力學(xué)進(jìn)行分析。實(shí)驗(yàn)結(jié)果表明,氯化鈉能有效地提升直接染料對(duì)苧麻纖維的上染率和固色率,而對(duì)耐水洗色牢度無(wú)影響。隨著溫度的升高,染料達(dá)到吸附平衡時(shí)間越快。隨著濃度的增加,染料上染率和固色率呈現(xiàn)下降趨勢(shì)。在動(dòng)力學(xué)方面,直接藍(lán)71和直接紅23上染苧麻纖維的過(guò)程符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型,直接藍(lán)71在水中的半染時(shí)間比直接紅23在水中上染的半染時(shí)間長(zhǎng)。在加鹽的染色條件下,染料的上染速率比無(wú)鹽染色的條件下快;且溫度越高,半染時(shí)間越短,擴(kuò)散系數(shù)越大,上染速率越快,活化能越低。在熱力學(xué)方面,直接染料對(duì)苧麻纖維的染色過(guò)程符合Freundlich吸附模型。在液氨染色介質(zhì)中,在不同的染色時(shí)間,染色溫度和染料濃度的條件下,考察染色條件對(duì)染料上染率、固色效率和耐水洗色牢度的影響,并對(duì)染色過(guò)程中的動(dòng)力學(xué)和熱力學(xué)進(jìn)行分析。實(shí)驗(yàn)結(jié)果表明,直接染料對(duì)苧麻纖維的上染率,隨著染色時(shí)間的增加而增加,約在60s后達(dá)到染色平衡。染色溫度(-40℃到-60℃)對(duì)染料的上染率無(wú)明顯的影響。隨著染料濃度的增加,染料上染率逐漸下降。在固色率方面,隨著時(shí)間的增加而增加,然后在達(dá)到染色平衡后上下波動(dòng),染色溫度對(duì)固色率無(wú)明顯影響,而隨著濃度的增加而下降。苧麻纖維的耐水洗色牢度,隨著染色時(shí)間和染料濃度的增加而都呈現(xiàn)下降的趨勢(shì)。直接染料在液氨介質(zhì)中對(duì)苧麻纖維的染色過(guò)程與水介質(zhì)一致,符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型和Freundlich吸附模型。
[Abstract]:The traditional printing and dyeing technology has a large environmental pollution, a large amount of wastewater discharge, and the organic compounds in the wastewater are complex. In this paper, direct blue 71 and direct red 23 dyes were used to study the dyeing properties of Ramie fibers in liquid ammonia medium, and the dyeing properties of Ramie fibers were compared with those of dyes in water medium. To investigate the dyeing properties of direct dyes on Ramie fibers in liquid ammonia medium. In water medium dyeing, under the conditions of different dyeing temperature, dyeing time, dye concentration and sodium chloride content. The effects of dyeing conditions on dye uptake, fixation efficiency and washing fastness were investigated. The kinetics and thermodynamics of the dyeing process were analyzed. The experimental results showed that sodium chloride could effectively increase the dye uptake and fixation rate of the direct dyes on Ramie fibers. With the increase of temperature, the adsorption equilibrium time was faster. With the increase of concentration, dye uptake and fixation showed a downward trend. The process of dyeing Ramie fiber on direct blue 71 and direct red 23 was in accordance with the quasi-second-order kinetic model. The half dyeing time of direct blue 71 in water was longer than that of direct red 23 in water. The higher the temperature, the shorter the half-dyeing time, the bigger the diffusion coefficient, the faster the dyeing rate and the lower the activation energy. The dyeing process of direct dyes on Ramie fiber was in accordance with Freundlich adsorption model. In liquid ammonia dyeing medium, under different dyeing time, dyeing temperature and dye concentration. The effects of dyeing conditions on dye uptake, fixation efficiency and washing fastness were investigated. The kinetics and thermodynamics of dyeing process were analyzed. With the increase of dyeing time, the dyeing balance was reached after 60 s. The dyeing temperature from -40 鈩，

本文編號(hào)：1387551