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封闭型水性聚氨酯合成及在纸张表面施胶中的应用
Synthesis of Closed Waterborne Polyurethane and Its Application in Paper Surface Sizing
收稿日期:2021-05-25  
DOI:10.11980/j.issn.0254-508X.2021.12.005
关键词:  封闭型水性聚氨酯  R  表面施胶  纸张性能
Key Words:closed waterborne polyurethane  R value  surface sizing  paper properties
基金项目:高分子/小分子复合表面活性剂驱油体系的制备及应用基础(2013SZS10-Z01)陕西省科技统筹创新工程重点实验室项目。
作者单位邮编
段业睿 陕西科技大学化学与化工学院陕西西安710021
陕西省轻化工助剂重点实验室陕西西安710021 
710021
沈一丁 陕西科技大学化学与化工学院陕西西安710021
陕西省轻化工助剂重点实验室陕西西安710021 
710021
李小瑞 陕西科技大学化学与化工学院陕西西安710021
陕西省轻化工助剂重点实验室陕西西安710021 
710021
刘一鹤 陕西科技大学化学与化工学院陕西西安710021
陕西省轻化工助剂重点实验室陕西西安710021 
710021
杨博 陕西科技大学化学与化工学院陕西西安710021
陕西省轻化工助剂重点实验室陕西西安710021 
710021
李春艳 陕西科技大学化学与化工学院陕西西安710021
陕西省轻化工助剂重点实验室陕西西安710021 
710021
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摘要:采用一步聚合法,以聚乙二醇350单甲醚(mPEG350)、丁二醇(BDO)、二羟甲基丙酸(DMPA)、异佛尔酮二异氰酸酯(IPDI)为原料进行聚合,得到一种封闭型的水性聚氨酯(BWPU)。将质量分数1%的BWPU与质量分数4%的PVA复配成施胶液(SSA),用于纸张表面施胶。结果表明,当DMPA添加量为10%、n(mPEG350)∶n(BDO)=1∶0.2、n(—NCO)∶n(—OH)(R值)为1.8,甲乙酮肟(MEKO)添加量为21.3%时,制备得到的BWPU性能最佳,其粒径为291.0 nm,分散稳定性指数(TSI)为1.33。施胶后的纸张撕裂指数为11.9 mN·m2/g,挺度为95.8 mN,抗张指数为82.6 N·m/g,耐折度为3394次,接触角为79.69°,施胶度为28.14°;与原纸相比,各项指标分别提高了76.8%、43.4%、7.8%、71.2%、26.3%,1307.0%。与市售施胶剂施胶后纸张相比,各项指标分别提高了20.9%、8.1%、15.9%、15.2%、10.3%、24.0%。
Abstract:A one-step polymerization method was used to prepare a closed aqueous polyurethane (BWPU) polymerized with polyethylene glycol 350 monomethyl ether (mPEG350), butanediol (BDO), dimethylolpropionic acid (DMPA), and isophorone diisocyanate (IPDI) as raw materials. The 1% BWPU and 4% PVA were compounded into a sizing solution (SSA) for paper surface sizing. The results showed that the optimized performance of BWPU could be obtained with the DMPA content of 10%, n(mPEG350)∶n(BDO)=1∶0.2, R value of 1.8, and ethyl methyl ketone oxime (MEKO) content of 21.3%, of which the particle size was 291.0 nm and the TSI was 1.33. After surface sizing, the paper had a better performance with the tear index of 11.9 mN·m2/g, the stiffness of 95.8 mN, the tensile index of 82.6 N·m/g, the folding endurance of 3394 times, the contact angle of 79.69°, and the sizing degree of 28.14°. Compared with the original paper, the indicators increased by 76.8%, 43.4%, 7.8%, 71.2%, 26.3%, 1307.0%, respectively. Compared with the paper sized with sizing agent on the market, the indicators increased by 20.9%, 8.1%, 15.9%, 15.2%, 10.3%, 24.0%, respectively.
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