CN107513880A - 一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法 - Google Patents

一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法 Download PDF

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CN107513880A
CN107513880A CN201710566767.4A CN201710566767A CN107513880A CN 107513880 A CN107513880 A CN 107513880A CN 201710566767 A CN201710566767 A CN 201710566767A CN 107513880 A CN107513880 A CN 107513880A
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汪义卉
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Abstract

本发明公开了一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法，其特征在于，向聚乙烯醇中加蒸馏水，搅拌溶解，缓慢滴加硫酸，反应得酸化聚乙烯醇；将水溶性聚乙烯醇纤维、甲基丙烯酸缩水甘油酯混合，加蒸馏水，调pH，加硝酸铈铵，高速搅拌溶解，滴加甲基丙烯酰氧乙基三甲基氯化铵，水浴反应，过滤、水洗至中性，真空干燥至恒重，得改性聚乙烯醇纤维；将石蜡水浴加热熔化，加吐温60、司盘60，搅拌均匀，加甲基丙烯酸甲酯、过硫酸钾，乳化反应，过滤得复合乳液防水剂；向粉煤灰纤维中加入蒸馏水，高速搅拌，加入硅烷偶联剂，继续搅拌处理后，与前面所得物料混合，超声振荡分散，得到一种浆料。

Description

一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法
技术领域
本发明涉及造纸领域，具体涉及一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法。
背景技术
粉煤灰纤维是粉煤灰通过熔融甩丝成纤工艺生产出来的超细无机矿物纤维，目前国内外对于粉煤灰纤维的研究和生产仍处于起步阶段，大部分研究依然停留在纤维抄纸以及纤维板制备等方面。
王程远在其硕士学位论文《粉煤灰纤维板的制备及防水性能研究》中，采用湿法制板工艺利用粉煤灰纤维制备板材，将粉煤灰纤维通过水利搅拌方法进行松解除渣处理，研究了胶粘剂聚乙烯醇、粉煤灰纤维浆料搅拌分散时间、粉煤灰纤维浓度、添加剂等因素对粉煤灰纤维板力学性能的影响，通过改性粉煤灰纤维、改性胶粘剂以及使用防水涂层来提高粉煤灰纤维板的防水性能。但是存在综合性能、防水性能不足。
发明内容
本发明主要解决的技术问题是提供一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法，依照该工艺制备的纸张具有高抗张强度和疏水性能。
本发明所要解决的技术问题采用以下的技术方案来实现：
一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于，按以下步骤进行：
a. 向20-30重量份聚乙烯醇中1:5-10加入蒸馏水，升温至80-90℃搅拌1-2h完全溶解，降温至40-50℃，缓慢滴加10-20重量份硫酸，保温2-3h后，冷却至室温，醇洗3-5次，抽滤，在50-60℃干燥3-5h得酸化聚乙烯醇；
b. 将30-40重量份水溶性聚乙烯醇纤维、2-4重量份甲基丙烯酸缩水甘油酯混合，1:10-20加入蒸馏水，用5-10%的HNO3调pH为1-2，加入0.1-0.2重量份硝酸铈铵，高速搅拌溶解，得悬浮液，滴加1-3重量份甲基丙烯酰氧乙基三甲基氯化铵，在40-50℃水浴中反应3-5h，过滤、水洗至中性，在40-60℃下真空干燥至恒重，得改性聚乙烯醇纤维；
c. 将6-10重量份石蜡在85-95℃下水浴加热，搅拌熔化，缓慢加2-3重量份吐温60、1-2重量份司盘60，搅拌均匀，1:3-5加蒸馏水，继续恒温搅拌1-2h，加5-8重量份甲基丙烯酸甲酯、0.1-0.2重量份过硫酸钾，在70-80℃搅拌乳化反应3-4h，冷却至室温，用100-200目筛网过滤出料，得复合乳液防水剂；
d. 向20-30重量份粉煤灰纤维中1:20-30加入蒸馏水，高速搅拌，加入硅烷偶联剂，继续搅拌处理1-2h后，与a、b、c中所得物料混合，超声振荡分散1-2h，得到所需浆料。
其中，步骤a中所述硫酸溶液浓度为10-20%；步骤c中所述乳化反应搅拌速度为1000-1100rpm；步骤d中所述硅烷偶联剂为KH550或KH560。
本发明的反应机理及有益效果如下：
用硅烷偶联剂对粉煤灰纤维进行处理，使其表面带有伯胺基官能团；用硫酸对聚乙烯醇（PVA）进行改性，引入酸性基团，可与伯胺基团产生作用，提高与粉煤灰纤维的结合能力，产生的氢键增加了造纸浆料中粉煤灰纤维之间的相互作用力，提高纸张的抗张强度；通过多元悬浮接枝共聚法，以硝酸铈铵为引发剂，甲基丙烯酰氧乙基三甲基氯化铵、甲基丙烯酸缩水甘油酯为功能化单体，制备了改性PVA纤维，对纸张有增强作用；以司盘60为乳化剂，以过硫酸钾为引发剂，以甲基丙烯酸甲酯为单体，与石蜡乳液进行乳液聚合，得复合乳液防水剂，将其用于改善纸张的耐水性和尺寸稳定性。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体实施例，进一步阐述本发明。
实施例
一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于，按以下步骤进行：
a. 向20kg聚乙烯醇中1:10加入蒸馏水，升温至80-90℃搅拌2h完全溶解，降温至40-50℃，缓慢滴加20kg硫酸，保温3h后，冷却至室温，醇洗5次，抽滤，在50-60℃干燥4h得酸化聚乙烯醇；
b. 将30kg水溶性聚乙烯醇纤维、2kg甲基丙烯酸缩水甘油酯混合，1:15加入蒸馏水，用10%的HNO3调pH为1-2，加入0.1kg硝酸铈铵，高速搅拌溶解，得悬浮液，滴加1kg甲基丙烯酰氧乙基三甲基氯化铵，在40-50℃水浴中反应3h，过滤、水洗至中性，在50-60℃下真空干燥至恒重，得改性聚乙烯醇纤维；
c. 将6kg石蜡在85-95℃下水浴加热，搅拌熔化，缓慢加2kg吐温60、1kg司盘60，搅拌均匀，1:5加蒸馏水，继续恒温搅拌1h，加5kg甲基丙烯酸甲酯、0.1kg过硫酸钾，在70-80℃搅拌乳化反应3h，冷却至室温，用100目筛网过滤出料，得复合乳液防水剂；
d. 向20kg粉煤灰纤维中1:25加入蒸馏水，高速搅拌，加入硅烷偶联剂，继续搅拌处理1h后，与a、b、c中所得物料混合，超声振荡分散2h，得到所需浆料。
其中，步骤a中所述硫酸溶液浓度为15%；步骤c中所述乳化反应搅拌速度为1100rpm；步骤d中所述硅烷偶联剂为KH550。

Claims (5)

1.一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于：
向聚乙烯醇中加蒸馏水，搅拌溶解，缓慢滴加硫酸，反应得酸化聚乙烯醇；将水溶性聚乙烯醇纤维、甲基丙烯酸缩水甘油酯混合，加蒸馏水，调pH，加硝酸铈铵，高速搅拌溶解，滴加甲基丙烯酰氧乙基三甲基氯化铵，水浴反应，过滤、水洗至中性，真空干燥至恒重，得改性聚乙烯醇纤维；将石蜡水浴加热熔化，加吐温60、司盘60，搅拌均匀，加甲基丙烯酸甲酯、过硫酸钾，乳化反应，过滤得复合乳液防水剂；向粉煤灰纤维中加入蒸馏水，高速搅拌，加入硅烷偶联剂，继续搅拌处理后，与前面所得物料混合，超声振荡分散，得到一种浆料。
2.一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于：
a. 向20-30重量份聚乙烯醇中1:5-10加入蒸馏水，升温至80-90℃搅拌1-2h完全溶解，降温至40-50℃，缓慢滴加10-20重量份硫酸，保温2-3h后，冷却至室温，醇洗3-5次，抽滤，在50-60℃干燥3-5h得酸化聚乙烯醇；
b. 将30-40重量份水溶性聚乙烯醇纤维、2-4重量份甲基丙烯酸缩水甘油酯混合，1:10-20加入蒸馏水，用5-10%的HNO3调pH为1-2，加入0.1-0.2重量份硝酸铈铵，高速搅拌溶解，得悬浮液，滴加1-3重量份甲基丙烯酰氧乙基三甲基氯化铵，在40-50℃水浴中反应3-5h，过滤、水洗至中性，在40-60℃下真空干燥至恒重，得改性聚乙烯醇纤维；
c. 将6-10重量份石蜡在85-95℃下水浴加热，搅拌熔化，缓慢加2-3重量份吐温60、1-2重量份司盘60，搅拌均匀，1:3-5加蒸馏水，继续恒温搅拌1-2h，加5-8重量份甲基丙烯酸甲酯、0.1-0.2重量份过硫酸钾，在70-80℃搅拌乳化反应3-4h，冷却至室温，用100-200目筛网过滤出料，得复合乳液防水剂；
d. 向20-30重量份粉煤灰纤维中1:20-30加入蒸馏水，高速搅拌，加入硅烷偶联剂，继续搅拌处理1-2h后，与a、b、c中所得物料混合，超声振荡分散1-2h，得到所需浆料。
3.根据权利要求2所述的一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于，步骤a中所述硫酸溶液浓度为10-20%。
4.根据权利要求2所述的一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于，步骤c中所述乳化反应搅拌速度为1000-1100rpm。
5.根据权利要求2所述的一种造纸用改性粉煤灰纤维增强的复合浆料的制备方法，其特征在于，步骤d中所述硅烷偶联剂为KH550或KH560。
CN201710566767.4A 2017-07-12 2017-07-12 一种造纸用改性粉煤灰纤维增强的复合浆料及其制备方法 Pending CN107513880A (zh)

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