Modification of Paper with Polyurethane
Modification of Paper with Polyurethane
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发表时间：
2006
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通讯作者：
L. Pei-yi
中科院分区：
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作者：
L. Pei-yi
研究了用异佛尔酮二异氰酸酯（IPDI）与纸张反应合成聚氨酯的方法。采用多媒体显微镜和红外光谱分析相结合的方法，对纸制聚氨酯的化学、物理特性及聚氨酯结构的形成机理进行了分析。从纸中提取的聚氨酯的强度随所用纸浆的不同而不同，强度由高到低依次为棉纸浆、软木纸浆、硬木纸浆和芦苇纸浆。当棉浆为（73°SR）， IPDI用量为12%，反应时间为10 min，反应温度为60℃时，产物的断裂长度增加58.40%，湿强/干强增加50.61%，折叠耐久性提高12.4倍，破裂指数提高67.73%。结果表明，经IPDI处理后，IPDI与纤维素之间形成碳酸盐键。氢键可转化为化学键，增强纸张的物理强度，特别是湿强度。
The methods of synthesizing polyurethane with the reaction of isophorone diisocyanate(IPDI) and paper were investigated.The combination of multimedia microscope and IR analysis was used to analyze the chemical and physical characteristics of the polyurethane derived from paper and the forming mechanism of the polyurethane structure.The strength of the polyurethane derived from paper is different depending on the pulps used,the order of strength from high to low is cotton pulp,softwood pulp,hardwood pulp and reed pulp.When cotton pulp is used and its beating degree is(73°SR,) dosage of IPDI is 12%,reaction time 10 min and temperature 60℃,the breaking length of the resultant product increases by 58.40%,and wet strength/dry strength is 50.61%,folding endurance increases 12.4 times,burst index increases by 67.73%.It is found that carbonate bond is formed between IPDI and cellulose of the fibers when the paper is treated with IPDI.The hydrogen bond can be changed into chemical bond and the paper's physical strength,especially the wet strength is enhanced through this treatment.