CN109438608B - 一种可降解餐具用偏氯乙烯共聚物水性乳液的制备方法 - Google Patents
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Abstract
本发明提供了一种可降解餐具用偏氯乙烯共聚物水性乳液的制备方法。一次性可降解淀粉或者纸制餐具在未经任何处理前,若用其盛装液体将在短时间内发生渗漏。将本发明制备的可降解餐具用偏氯乙烯共聚物水性乳液涂敷于餐具内壁,可显著提高其对各种生活中常见液体的耐受性能。原料廉价易得,生产设备及工艺简单。
Description
技术领域
本发明属于涂料领域,涉及一种可降解餐具用偏氯乙烯共聚物水性乳液的制备方法。
背景技术
随着环境保护越来越得到国家的重视,以及人们环保意识的不断增强,种类繁多的环保餐具被开发了出来。可降解餐具是环保餐具中的一大类,使用的材料主要包括纸浆,食用粉和植物纤维。这些材料对水和油,以及酒类的阻隔性普遍较差,很容易在使用的过程中发生变形,渗漏。聚乳酸材料虽然阻隔性较好,但是作为一次性餐具的成本较高。
聚偏氯乙烯具有优良的阻隔性能,安全环保,符合食品卫生要求。广泛应用于火腿肠、奶酪、零食等食品包装,医用包装,电子产品包装以及化工包装等领域。由于纯的聚偏氯乙烯材料加工困难,故在实际应用中,将偏氯乙烯单体与其他单体进行共聚,制得偏氯乙烯含量为75%~95%的偏氯乙烯共聚物。将这种偏氯乙烯共聚物的乳液,涂敷于可降解餐具上,可以形成一层保护膜,有效阻隔各种常见液体(热水,酱油,白酒,醋等)的渗漏,方法简单。
全淀粉可降解餐具是由未经改性的常规淀粉模压成型制得,具有硬度高不易变形以及成本低的特点。但是在未经处理之前几乎没有对液体的耐受性,无法使用。将可降解餐具用偏氯乙烯共聚物水性乳液涂敷在餐具内表面可形成一层保护层,餐具就可以获得优异的耐受性。由水性乳液干燥后形成的保护膜并不是十分的致密,这就使得这层聚合物薄膜具有了更高的可降解性。保证了一次性可降解餐具的高降解,低成本,高质量,安全无毒。
公开号为106317661A公开了可降解一次性纸杯材料,其中的不可降解成分>50%。公开号106496652A公开了一种淀粉发泡的一次性餐具,其主体材料为改性淀粉和木浆纤维,成本偏高。
发明内容
本发明提供了一种可降解餐具用偏氯乙烯共聚物水性乳液的制备方法和应用,可以提高可降解一次性餐具的使用性能。
本发明首先提供一种可降解餐具用偏氯乙烯共聚物水性乳液,按重量份数计,包括:
丙烯酸酯类单体10-20份
偏氯乙烯单体 80-90份
去离子水 100-233份
乳化剂 1-4份
PH缓冲剂 0-0.7份
引发剂 0.5-2.25份
增稠剂 0-0.25份
优选的是,所述的丙烯酸酯类单体选自,丙烯酸C1-C10酯中的一种或几种。
优选的是,所述的乳化剂选自,脂肪酸皂、树脂酸皂、烷基磺酸皂、烷基苯磺酸皂、烷基硫酸盐和聚氧乙烯辛苯酚醚中的一种或几种。
优选的是,所述的PH缓冲剂选自、碳酸钠、碳酸氢钠、磷酸氢二钠、柠檬酸、醋酸钠、醋酸中的一种或几种。
优选的是,所述的引发剂选自,过硫酸钾、过硫酸铵、亚硫酸氢钠、过氧化二苯甲酰、偶氮二异丁腈中的一种或几种。
优选的是,所述的增稠剂选自,羧甲基纤维素、羧乙基纤维素、聚乙二醇、聚丙烯酸、聚丙烯酰胺中的一种或几种。
本发明还提供一种可降解餐具用偏氯乙烯共聚物水性乳液的制备方法,包括如下:
步骤一:在反应容器中加入丙烯酸酯类单体,偏氯乙烯单体,去离子水,乳化剂,PH缓冲剂,在20-30℃的条件下预乳化20-60分钟。
步骤二:在反应容器中加入引发剂,在55-65℃下反应3-8小时。
步骤三:加入增稠剂,持续搅拌1-3小时后得到可降解餐具用偏氯乙烯共聚物水性乳液。
本发明有益效果
本发明提供一种可降解餐具用偏氯乙烯共聚物水性乳液,该乳液可以涂布在可降解餐具内壁,形成一层致密的保护膜,以保证餐具在使用的过程中不会发生内容物的渗漏。同时这种乳液涂膜本身相比于传统的涂膜机涂膜,应用起来更加灵活,同时形成的膜本身也具有更强的可降解性。该制备方法简单,不添加有机溶剂,绿色安全环保。
本发明还提供一种可降解餐具用偏氯乙烯共聚物水性乳液作为防水涂料在一次性可降解餐具领域中的应用。涂布该乳液的全纸质餐具,全淀粉餐具,具有了优异的耐水型能。
具体实施方式
实施例1
在装有搅拌装置,冷却装置,加热装置的压力反应釜中加入75g丙烯酸异辛酯,425g偏氯乙烯单体,500g去离子水,1.5g聚氧乙烯辛基苯酚醚-10,5g十二烷基硫酸钠,2g碳酸钠,在20℃的条件下预乳化20分钟。
在反应容器中加入5g过硫酸钾,1.25g亚硫酸氢钠,在55℃下反应5小时。
加入羧乙基纤维素,持续搅拌3小时,得到可降解餐具用偏氯乙烯共聚物水性乳液。
将得到的可降解餐具用偏氯乙烯共聚物水性乳液涂于一次性全降解淀粉餐杯内表面后室温干燥8h,进行性能测试,结果如表1所示。
实施例2
在装有搅拌装置,冷却装置,加热装置的压力反应釜中加入40g丙烯酸异辛酯,10g丙烯酸丁酯,450g偏氯乙烯单体,750g去离子水,5g十二烷基硫酸钠,3.5g碳酸钠,在30℃的条件下预乳化60分钟。
在反应容器中加入2.5g过硫酸钾,在65℃下反应8小时。
加入羧乙基纤维素,持续搅拌1小时,得到可降解餐具用偏氯乙烯共聚物水性乳液。
将得到的可降解餐具用偏氯乙烯共聚物水性乳液涂于一次性全降解淀粉餐杯内表面后室温干燥8h,进行性能测试,结果如表1所示。
实施例3
在装有搅拌装置,冷却装置,加热装置的压力反应釜中加入37.5g丙烯酸异辛酯,12.5g丙烯酸甲酯,200g偏氯乙烯单体,582.5g去离子水,2.5g聚氧乙烯辛基苯酚醚-10,7.5g十二烷基硫酸钠,在25℃的条件下预乳化30分钟。
在反应容器中加入3.75g过硫酸钾,1.875g亚硫酸氢钠,在55℃下反应3小时。
加入羧乙基纤维素,持续搅拌2小时,得到可降解餐具用偏氯乙烯共聚物水性乳液。
将得到的可降解餐具用偏氯乙烯共聚物水性乳液涂于一次性全降解淀粉餐杯内表面后室温干燥8h,进行性能测试,结果如表1所示。
实施例4
在装有搅拌装置,冷却装置,加热装置的压力反应釜中加入75g丙烯酸异辛酯,425g偏氯乙烯单体,500g去离子水,1.5g聚氧乙烯辛基苯酚醚-10,5g十二烷基硫酸钠,2g碳酸钠,在20℃的条件下预乳化30分钟。
在反应容器中加入7.5g过硫酸钾,在60℃下反应5小时。
加入羧乙基纤维素,持续搅拌2小时,得到可降解餐具用偏氯乙烯共聚物水性乳液。
将得到的可降解餐具用偏氯乙烯共聚物水性乳液涂于一次性全降解淀粉餐杯内表面后室温干燥8h,进行性能测试,结果如表1所示。
实施例5
在装有搅拌装置,冷却装置,加热装置的压力反应釜中加入75g丙烯酸异辛酯,425g偏氯乙烯单体,500g去离子水,1.5g聚氧乙烯辛基苯酚醚-10,5g十二烷基硫酸钠,2.5g碳酸氢钠,在20℃的条件下预乳化30分钟。
在反应容器中加入7.5g过硫酸铵,在55℃下反应5小时。
加入羧甲基纤维素,持续搅拌2,得到可降解餐具用偏氯乙烯共聚物水性乳液。
将得到的可降解餐具用偏氯乙烯共聚物水性乳液涂于一次性全降解淀粉餐杯内表面后室温干燥8h,进行性能测试,结果如表1所示。
表1
以上实施例的说明只适用于帮助理解本发明的方法及核心思想。应当指出,对于技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围。
对所公开的实施例的上诉说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其他实施例中实现。因此本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽范围。
Claims (1)
1.一种可降解餐具用偏氯乙烯共聚物水性乳液,
在装有搅拌装置,冷却装置,加热装置的压力反应釜中加入75g丙烯酸异辛酯,425g偏氯乙烯单体,500g去离子水,1.5g聚氧乙烯辛基苯酚醚-10,5g十二烷基硫酸钠,2g碳酸钠,在20℃的条件下预乳化20分钟;
在反应容器中加入5g过硫酸钾,1.25g亚硫酸氢钠,在55℃下反应5小时;
加入羧乙基纤维素,持续搅拌3小时,得到可降解餐具用偏氯乙烯共聚物水性乳液。
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