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阳离子分散松香胶的制备及其应用
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摘要
本论文是围绕性能稳定的阳离子分散松香胶的制备进行研究的。首先是利用三乙胺、环氧氯丙烷、松香在以乙醇为介质中合成阳离子松香型乳化剂。其最佳工艺条件为松香、三乙胺、环氧氯丙烷的摩尔比为1:1:1,用乙醇将松香完全溶解后加入三乙胺,室温反应0.5h后,在0.5h内滴加完环氧氯丙烷后升温,并保持温度为90℃,反应时间为3h,转速225r/min。该乳化剂对松香有较好的乳化能力,并且与其他的阳离子和非离子表面活性剂有很好的相容性。
     用12.5%自制阳离子松香型乳化剂与3%的阳离子表面活性剂1631和2%非离子表面活性剂复配,利用常压逆转法就可制备性能稳定的阳离子分散松香胶乳液。其最佳乳化工艺为:乳化温度为130~140℃,转相温度为90℃~95℃,乳化过程转速400~500r / min,转相时转速3500r /min以上。该施胶剂具有较好的施胶效果,用于MOW脱墨浆和全漂阔叶木浆时,采用逆向施胶、90℃干燥湿纸页、施胶剂加入量1.0%、硫酸铝加入量1.5%、pH值6.0时,施胶度分别达到108s、62.9s。
     该乳化剂对C5、C9石油树脂也有较好的乳化能力,当用10%~20%的C9石油树脂或40%~60%的C5石油树脂取代部分松香时,用12.5%阳离子松香型乳化剂与5%的阳离子和非离子表面活性剂复配,采用常压逆转法能制得性能稳定的施胶剂,其最佳乳化工艺为:乳化温度为140~150℃,转相温度为90℃~95℃,乳化过程转速400~500r / min,转相时转速3500r /min以上。制得施胶剂都有很好的的稳定性,常温放置6个月不分层。但是加C9石油树脂的相对未加石油树脂的胶施胶效果有少量下降,而加C5石油树脂相对未加石油树脂施胶效果有所提高。除此之外添加了石油树脂的施胶剂,提高了施胶的pH,当pH不高于7时都有不错的施胶效果,可以实现中性施胶。
Preparation of stable cationic dispersed rosin size is the research highlights of thispaper . Cationic rosin emulsifier was synthesized by triethylamine, rosin and epichlorohydrinin ethanol. the optimum mass ratio is 1:1:1. Adding triethylamine when the resin iscompletely dissolved in ethanol,0.5 hours later, dropping epichlorohydrin within 0.5 hours,then hearing. keep the reaction temperature is 90℃, time was 4 hours, speed 225r/min. Thecationic rosin emulsifier can be used as effective emulsifiers for rosin emulsification. Besides,this emulsifier can be used together with other cationic and nonionic surfactants.
     Stable cationic dispersed rosin size can be prepared by normal pressure inversionprocess with 12.5% cationic rosin emulsifier and 3.0% cationic surfactants and 2.0% nonionicsurfactants. The optimum conditions for the emulsion are that the emulsion temperature is130~140℃, the conversion temperature is 90~95℃, emulsification speed is 400 ~ 500 r / min,the conversion speed is more than 3500r / min . The size has good sizing effect .The sizingdegreed can be 108s and 62.9s when used in MOW de-inked pulp and bleaching hardwoodpulp. The optimum conditions for use are that temperature of drying wet sheet is 90℃, themass of sizing agents is 1.0%, the mass of aluminum sulfate is1.5% and pH value is 6.0.
     The emulsifier also has good emulsifying capacity for the C5, C9 petroleum resin.When using 10% to 20% of the C9 petroleum resin, or 40% to 60% of the C5 petroleum resinto replace part of the rosin and using 12.5% rosin cationic emulsifier and 5% cationic andnonionic surfactant ,Stable cationic dispersed rosin size can be prepared by normal pressureinversion process . The optimum conditions for the emulsion are that the emulsiontemperature is 140~150℃, the conversion temperature is 90~95℃, emulsification speed is400 ~ 500 r / min, the conversion speed is more than 3500r / min .Prepared size have goodstability. It is not layered for 6 months under the normal temperature. But when using C9petroleum resin the sizing effect is almost a little better than without petroleum resin andusing C5 petroleum resin the sizing effect is better than without petroleum resin. Inaddition ,adding petroleum resin can improve pH value of sizing .when the pH value is nothigher than 7.0,it have a good sizing effect. So it can be used under neutral condition.
引文
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