CN107059464A - pH试纸原纸及其制备方法和应用 - Google Patents
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Abstract
本发明涉及一种PH试纸原纸及其制备方法和应用。本发明提供了pH试纸原纸,包括原纸和原纸上覆盖的低灰针叶松木浆层,原纸按重量份数计包括玉米秸秆纤维50‑70份,胶黏纤维5‑12份和高密度棉短绒浆30‑50份,制备中用到两性聚丙烯酰胺0.05‑2份,改性淀粉轻质碳酸钙0.2‑0.8份,具有250万~300万分子量的聚氧化乙烯0.05‑3份,消泡剂0‑0.2份,所述的低灰针叶松木浆层的厚度为0.02‑0.1mm。该pH试纸原纸既有较高的强度,又有较高的耐破度,对液体具有良好的吸收性能。
Description
技术领域
本发明涉及纸张技术领域,具体涉及一种pH试纸原纸及其制备方法和应用。
背景技术
pH试纸被广范应用于科研、工业、农业、环保、医药和食品领域,用以测定液体和气体的pH值。pH的反应原理是基于pH指示剂法,目前,一般的pH分析试纸中含有甲基红[pH4.2(红)~6.2(黄)],溴甲酚绿[pH3.6(黄)~5.4(绿)],溴百里香酚蓝[pH6.7(黄)~7.5(蓝)],这些混合的酸碱指示剂适量配合可以反映pH4.5~9.0的变异范围。然而,现有市场上的pH精密试纸精密度相对较差,一般的精密试纸pH值测量的误差在±1左右,而且其容易受室内环境的影响,尤其是时间,当试纸离开测试液后会迅速变化,如果不是迅速判断,则很可能引入较大的误差,且现有pH试纸原纸的韧度差,易破、吸收性能也有待提高。
发明内容
针对现有技术的不足,本发明提供一种纤维分布均匀,既有较高的强度,又有较高的耐破度,对液体具有良好的吸收性能pH试纸原纸,本发明还提供了该pH试纸原纸的制备方法。
为实现发明目的,本发明采用以下技术方案:
pH试纸原纸,包括原纸和原纸上覆盖的低灰针叶松木浆层,原纸按重量份数计包括玉米秸秆纤维50-70份,胶黏纤维5-12份和高密度棉短绒浆30-50份,制备中用到两性聚丙烯酰胺0.05-2份,改性淀粉轻质碳酸钙0.2-0.8份,具有250万~300万分子量的聚氧化乙烯0.05-3份,消泡剂0-0.2份,所述的低灰针叶松木浆层的厚度为0.02-0.1mm。
作为优选,高密度棉短绒浆的制备是加入YY-02渗透剂进行先打浆后经碱蒸煮获得的。
作为优选,所述的玉米秸秆纤维的制备方法是先对玉米秸秆进行清洗、切段,用蒸煮法提取秸皮纤维,经过漂白使纸张白度符合要求,再通过打浆使纤维细化。
作为优选,所述的两性聚丙烯酰胺的制备方法采用壳聚糖与丙烯酰胺(AM)、马来酸(MA)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)接枝共聚,制备出壳聚糖接枝两性聚丙烯酰胺,两性聚丙烯酰胺对各种浆料均具有很好的增强和助留助滤以及辅助施胶效果。
作为优选,所述的两性聚丙烯酰胺的制备方法是在70℃乙酸溶解壳聚糖,加入AM、MA、DMC得混合溶液,壳聚糖、AM、MA、DMC的摩尔比为1∶9∶5∶1,80℃往混合溶液中加入三元引发剂(过硫酸钠、亚硫酸氢钠、硝酸铈铵),反应4h。
作为优选,所述的改性淀粉轻质碳酸钙的制备方法是将淀粉用量28%(相对于轻质碳酸钙)和轻质碳酸钙填料在烧杯内混合,加入水,混合成固含量为28%的溶液,用玻璃棒搅拌5min,然后把混合物放进烤炉,温度设90℃,蒸煮45~60min搅拌,形成胶状物质。
本发明关于pH试纸原纸的制备方法,采取如下的技术手段:
pH试纸原纸的制备方法,包括以下步骤:
步骤一、按配料量将玉米秸秆纤维,胶黏纤维和高密度棉短绒浆于高频疏解机进行疏解打浆,再在配浆池稀释制成浓度1.9-3.8%,pH值6-8的浆料;
步骤二、往浆料中加入配料量的两性聚丙烯酰胺,改性淀粉轻质碳酸钙,具有250万~300万分子量的聚氧化乙烯和消泡剂,进行搅拌混合得到浓度0.3-1.2%的浆料;
步骤三、将步骤二得到的浆料按常规条件上网抄造及压榨得到原纸;
步骤四、将原纸用乙醇超声清洗,(30~60)℃下进行干燥,通过乙醇超声,将微粒等除去。
步骤五、将相同面积的低灰针叶松木浆层覆盖在经步骤四处理的原纸上,再将低灰针叶松木浆层与原纸经热压形成热压复合滤纸。
本发明的pH试纸原纸采用玉米秸秆纤维,胶黏纤维和高密度棉短绒浆为纤维原料,其中采用玉米秸秆纤维可以解决现有我国木材资源较为贫乏,需要依赖于进口玉米秸秆纤维,同时玉米秸秆纤维替代木浆纤维具有节约资源、降低成本的特点;秸皮中所含木素量少,且纤维素含量比重较高,与木材纤维素含量相差不大,可作为很好的造纸原料;而且粘胶纤维具有良好的吸湿性;棉短绒浆是一种资源丰富的、可再生的、极待开发的、特殊的非木材原料。棉浆与木浆、草浆相比有其独特之处,它含纤维素较纯,纤维细长而有弹性,坚韧耐折,柔软,吸收性能好,具有高度的不透明性,并且可以经久保存,将三种纤维作为纤维原料可以发挥协同效果,制得过滤吸收性能好、使用寿命长、耐水性好、受压强度高的pH试纸原纸。
在滤纸的制备过程中加入两性聚丙烯酰胺,可对各种浆料均具有很好的增强和助留助滤以及辅助施胶效果。改性淀粉轻质碳酸钙加入由于轻质碳酸钙PCC填料的白度较高,使得原纸的白度也较高,同时该填料提高了原纸的物理性能,不仅可以改善纸张的性能,还可以节约纤维物料;聚氧化乙烯具有絮凝、增稠、缓释、润滑、分散、助留、保水等性能,聚氧化乙烯还可以缩短打浆时间,可以使用打浆度较低的纸浆,抄造出匀度良好的纸张,同时纸页柔软性和强度都较好。250万~300万分子量的聚氧化乙烯,其伸展性高分子结构阻止了长纤维表面的相互接触,提高提高浆料悬浮体的黏度,因此限制了纤维絮凝的产生。
具体实施方式
下面通过实施例进一步描述本发明,但本发明不仅仅局限于以下实施例。
实施例1
pH试纸原纸,包括原纸和原纸上覆盖的低灰针叶松木浆层,原纸按重量份数计包括玉米秸秆纤维30份,聚丙烯纤维5份和高密度棉短绒30份,制备中用到两性聚丙烯酰胺0.05份,改性淀粉轻质碳酸钙0.2份,具有250万~300万分子量的聚氧化乙烯0.05份。
所述的低灰针叶松木浆层的厚度为0.02mm。
高密度棉短绒浆的制备是加入YY-02渗透剂进行先打浆后经碱蒸煮获得的。
所述的玉米秸秆纤维的制备方法是先对玉米秸秆进行清洗、切段,用蒸煮法提取秸皮纤维,经过漂白使纸张白度符合要求,再通过打浆使纤维细化。
所述的两性聚丙烯酰胺的制备方法是在70℃乙酸溶解壳聚糖,加入丙烯酰胺(AM)、马来酸(MA)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)得混合溶液,壳聚糖、AM、MA、DMC的摩尔比为1∶9∶5∶1,80℃往混合溶液中加入三元引发剂(过硫酸钠、亚硫酸氢钠、硝酸铈铵),反应4h制得。
所述的改性淀粉轻质碳酸钙的制备方法是将淀粉用量28%(相对于轻质碳酸钙)和轻质碳酸钙填料在烧杯内混合,加入水,混合成固含量为28%的溶液,用玻璃棒搅拌5min,然后把混合物放进烤炉,温度设900℃,蒸煮45~60min搅拌,形成胶状物质。
pH试纸原纸的制备方法,包括以下步骤:
步骤一、按上述配料量将玉米秸秆纤维,胶黏纤维和高密度棉短绒浆于高频疏解机进行疏解打浆,再在配浆池稀释制成浓度1.9%,pH值6-8的浆料;
步骤二、往浆料中加入上述配料量的两性聚丙烯酰胺,改性淀粉轻质碳酸钙和具有250万~300万分子量的聚氧化乙烯,进行搅拌混合得到浓度1.5%的浆料;
步骤三、将步骤二得到的浆料按常规条件上网抄造及压榨得到原纸;
步骤四、将原纸用乙醇超声清洗,(30~60)℃下干燥,备用,通过乙醇超声,将微粒等除去;
步骤五、将相同面积的低灰针叶松木浆层覆盖在经步骤四处理的原纸上,再将低灰针叶松木浆层与原纸经热压形成热压复合滤纸。
实施例2
pH试纸原纸,包括原纸和原纸上覆盖的低灰针叶松木浆层,原纸按重量份数计包括玉米秸秆纤维50份,聚丙烯纤维12份和高密度棉短绒50份,制备中用到两性聚丙烯酰胺2份,改性淀粉轻质碳酸钙0.8份,具有250万~300万分子量的聚氧化乙烯3份,消泡剂0.2份。
所述的低灰针叶松木浆层的厚度为0.1mm。
高密度棉短绒浆的制备是加入YY-02渗透剂进行先打浆后经碱蒸煮获得的。
所述的玉米秸秆纤维的制备方法是先对玉米秸秆进行清洗、切段,用蒸煮法提取秸皮纤维,经过漂白使纸张白度符合要求,再通过打浆使纤维细化。
所述的两性聚丙烯酰胺的制备方法是在70℃乙酸溶解壳聚糖,加入丙烯酰胺(AM)、马来酸(MA)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)得混合溶液,壳聚糖、AM、MA、DMC的摩尔比为1∶9∶5∶1,80℃往混合溶液中加入三元引发剂(过硫酸钠、亚硫酸氢钠、硝酸铈铵),反应4h制得。
所述的改性淀粉轻质碳酸钙的制备方法是将淀粉用量28%(相对于轻质碳酸钙)和轻质碳酸钙填料在烧杯内混合,加入水,混合成固含量为28%的溶液,用玻璃棒搅拌5min,然后把混合物放进烤炉,温度设900℃,蒸煮45~60min搅拌,形成胶状物质。
pH试纸原纸的制备方法,包括以下步骤:
步骤一、按配料量将玉米秸秆纤维,胶黏纤维和高密度棉短绒浆于高频疏解机进行疏解打浆,再在配浆池稀释制成浓度3.8%,pH值6-8的浆料;
步骤二、往浆料中加入配料量的两性聚丙烯酰胺,改性淀粉轻质碳酸钙,具有250万~300万分子量的聚氧化乙烯和消泡剂,进行搅拌混合得到浓度2.5%的浆料;
步骤三、将步骤二得到的浆料按常规条件上网抄造及压榨得到原纸;
步骤四、将原纸用乙醇超声清洗,(30~60)℃下干燥;
步骤五、将相同面积的低灰针叶松木浆层覆盖在经步骤四处理的原纸上,再将低灰针叶松木浆层与原纸经热压形成热压复合滤纸。
实施例3
pH试纸原纸,包括原纸和原纸上覆盖的低灰针叶松木浆层,原纸按重量份数计包括玉米秸秆纤维45份,聚丙烯纤维10份和高密度棉短绒36份,制备中用到两性聚丙烯酰胺1.0份,改性淀粉轻质碳酸钙0.4份,具有250万~300万分子量的聚氧化乙烯1.5份,消泡剂0.1份。
所述的低灰针叶松木浆层的厚度为0.05mm。
高密度棉短绒浆的制备是加入YY-02渗透剂进行先打浆后经碱蒸煮获得的。
所述的玉米秸秆纤维的制备方法是先对玉米秸秆进行清洗、切段,用蒸煮法提取秸皮纤维,经过漂白使纸张白度符合要求,再通过打浆使纤维细化。
所述的两性聚丙烯酰胺的制备方法是在70℃乙酸溶解壳聚糖,加入丙烯酰胺(AM)、马来酸(MA)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)得混合溶液,壳聚糖、AM、MA、DMC的摩尔比为1∶9∶5∶1,80℃往混合溶液中加入三元引发剂(过硫酸钠、亚硫酸氢钠、硝酸铈铵),反应4h制得。
所述的改性淀粉轻质碳酸钙的制备方法是将淀粉用量28%(相对于轻质碳酸钙)和轻质碳酸钙填料在烧杯内混合,加入水,混合成固含量为28%的溶液,用玻璃棒搅拌5min,然后把混合物放进烤炉,温度设90℃,蒸煮45~60min搅拌,形成胶状物质。
pH试纸原纸的制备方法,包括以下步骤:
步骤一、按配料量将玉米秸秆纤维,胶黏纤维和高密度棉短绒浆于高频疏解机进行疏解打浆,再在配浆池稀释制成浓度2.3%,pH值6-8的浆料;
步骤二、往浆料中加入配料量的两性聚丙烯酰胺,改性淀粉轻质碳酸钙,具有250万~300万分子量的聚氧化乙烯和消泡剂,进行搅拌混合得到浓度1.8%的浆料;
步骤三、将步骤二得到的浆料按常规条件上网抄造及压榨得到原纸;
步骤四、将原纸用乙醇超声清洗,(30~60)℃下干燥;
步骤五、将相同面积的低灰针叶松木浆层覆盖在经步骤四处理的原纸上,再将低灰针叶松木浆层与原纸经热压形成热压复合滤纸。
上述实施例制得的pH试纸原纸技术指标如下表所示:
项目 | 单位 | 实施例1 | 实施例2 | 实施例3 |
耐破度 | kPa | 378 | 369 | 374 |
抗张强度 | kN/m | 1.15 | 1.26 | 1.32 |
伸长率 | % | 5.22 | 5.14 | 4.96 |
挺度 | mN.m | 3.43 | 3.85 | 3.64 |
最大孔径 | μm | 53 | 53 | 54 |
平均孔径 | μm | 33 | 34 | 32 |
过滤效率 | μm | 16~20 | 16~20 | 16~20 |
透气度 | L/m2.S | 88 | 87 | 86 |
分离性能) | 沉淀物 | 氢氧化铁 | 氢氧化铁 | 氢氧化铁 |
滤水时间 | s | 25 | 28 | 30 |
裂断长 | km | 2.0 | 2.3 | 1.9 |
湿耐破度 | mm水柱 | 230 | 240 | 235 |
灰分 | % | 0.06 | 0.04 | 0.05 |
最后说明的是,以上优选实施例仅用以说明本发明的技术方案而非限制,尽管通过上述优选实施例已经对本发明进行了详细的描述,但本领域技术人员应当理解,可以在形式上和细节上对其作出各种各样的改变,而不偏离本发明权利要求书所限定的范围。
Claims (5)
1.pH试纸原纸,其特征在于包括原纸和原纸上覆盖的低灰针叶松木浆层,原纸按重量份数计包括玉米秸秆纤维50-70份,胶黏纤维5-12份和高密度棉短绒浆30-50份,制备中用到两性聚丙烯酰胺0.05-2份,改性淀粉轻质碳酸钙0.2-0.8份,具有250万~300万分子量的聚氧化乙烯0.05-3份,消泡剂0-0.2份,所述的低灰针叶松木浆层的厚度为0.02-0.1mm。
2.根据权利要求1所述的pH试纸原纸,其特征在于所述的两性聚丙烯酰胺的制备方法采用壳聚糖与丙烯酰胺AM、马来酸MA、甲基丙烯酰氧乙基三甲基氯化铵DMC接枝共聚,制备出壳聚糖接枝两性聚丙烯酰胺,两性聚丙烯酰胺对各种浆料均具有很好的增强和助留助滤以及辅助施胶效果。
3.根据权利要求2所述的pH试纸原纸,其特征在于所述的两性聚丙烯酰胺的制备方法是在70℃乙酸溶解壳聚糖,加入AM、MA、DMC得混合溶液,壳聚糖、AM、MA、DMC的摩尔比为1∶9∶5∶1,80℃往混合溶液中加入三元引发剂过硫酸钠、亚硫酸氢钠、硝酸铈铵,反应4h。
4.根据权利要求1所述的pH试纸原纸,其特征在于所述的改性淀粉轻质碳酸钙的制备方法是将轻质碳酸钙用量的28%的淀粉和轻质碳酸钙填料在烧杯内混合,加入水,混合成固含量为28%的溶液,用玻璃棒搅拌5min,然后把混合物放进烤炉,温度设90℃,蒸煮45~60min搅拌,形成胶状物质。
5.如权利要求1至4任一所述的pH试纸原纸的制备方法,其特征在于包括以下步骤:
步骤一、按配料量将玉米秸秆纤维,聚丙烯纤维和高密度棉短绒于高频疏解机进行疏解打浆,再在配浆池稀释制成浓度1.9-3.8%,pH值6-8的浆料;
步骤二、往浆料中加入配料量的两性聚丙烯酰胺,改性淀粉轻质碳酸钙,具有250万~300万分子量的聚氧化乙烯和消泡剂,进行搅拌混合得到浓度1.5-2.5%的浆料;
步骤三、将步骤二得到的浆料按常规条件上网抄造及压榨得到原纸;
步骤四、将原纸用乙醇超声清洗,30~60℃下干燥;
步骤五、将相同面积的低灰针叶松木浆层覆盖在经步骤四处理的原纸上,再将低灰针叶松木浆层与原纸经热压形成热压复合滤纸。
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CN112721306A (zh) * | 2020-12-30 | 2021-04-30 | 江苏洋河集团包装材料有限公司 | 一种高强度白酒包装用瓦楞纸箱生产工艺 |
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