摘要
以含双键的纳米二氧化硅粉体与丙烯酸酯类单体通过原位无皂乳液聚合合成了表面施胶增强剂。材料的力学性能和耐水性均好,其中拉伸强度最高可达5.5 N.mm-2,断裂伸长率可达到102%;耐水性最低为12.5%。FT-IR分析表明,表面含双键的纳米SiO2(RNS-D)作为反应单体参与聚合反应,实现了聚合物-无机之间的化学键合,两者复合达到分子水平。应用结果表明,杂化材料用作纸张表面施胶增强剂不仅提高了纸张强度,还使纸张的施胶度得到了提高,在杂化材料用量为1%时抗张强度提高16.1%,拉毛强度提高30.4%,施胶度可达65 s。杂化材料与淀粉施胶剂复配有联合增效作用。
Styrene acrylic emulision（SAE）/SiO2 strength agent was prepared by copolymerization with unsaturated（RNS-D） nano-SiO2 and acrylate monomer. The incorption of nano-SiO2 has a toughening and reinforcing effect. The tensile strength of the SAE/SiO2 film reached 5.5 N＇mm-2, the elongation at break reached 102% and the water absorption reached the lowest value 12.5%; FT-IR result indicated that RNS-D whose surface was modified by unsaturated organic compounds was used as a monomer taking part in the reaction completely, and that there were chemical bonds between SAE and nano-SiO2. Moreover, the applied properties of the paper were measured as follows when the dosage of the strength agent was 1%, paper tensile strength increased by 16.10% and picking velocity increased by 30.4%. At the same time the sizing value of paper was 65 s. The effects were close to or higher than that of single polymer emulsion when the oxidized starch and polymer emulsion were used as a complex system in proper proportions.
出处
《纸和造纸》
北大核心
2012年第3期40-43,共4页
Paper and Paper Making
基金
陕西省教育厅科研专项(2010JK458)
陕西科技大学科研启动基金项目(BJ11-05)
