发泡剂对聚乙烯醇/碱木质素发泡材料性能的影响  

Effect of foam agent on properties of polyvinyl alcohol/alkali lignin foam material

作　　者：罗华超[1] 任世学[1] 方桂珍[1] 

机构地区：[1]东北林业大学材料科学与工程学院,哈尔滨150040

出　　处：《功能材料》2015年第B12期141-146,共6页Journal of Functional Materials

基　　金："十二五"国家科技支撑计划资助项目(2012BAD24B0403);国家自然科学基金资助项目(30901135)

摘　　要：采用有机、无机、复合发泡剂制备了聚乙烯醇/碱木质素发泡材料(PAFM),优化发泡剂用量。结果表明,有机、无机、复合发泡剂的最佳用量分别是3.0%,3.0%和4.0%;在最优条件下,无机发泡材料具有较高的力学性能和吸水性能,但其表观密度较高,随着溶液pH值的升高,发泡材料的降解率降低;FT-IR显示有机、无机发泡材料发生苯环5位取代,且无机发泡材料的交联度较高;扫描电镜观察到发泡材料均具有明显的孔隙结构,但其孔隙结构不均匀,主要由于固化过程中水分挥发泡孔结构破裂导致;热分析:DSC显示无机发泡材料的生物相容性较好;TG显示,3种发泡材料的失重率最高峰对应的峰值温度依次增大,同时降解残留物依次较少,因而无机发泡材料的热稳定性较好,且降解性能好。因此,3种不同发泡剂制的发泡材料中,无机发泡材料性能最优。Prepared polyvinyl alcohol/alkali lignin foam material respectively by composite, Organic, inorganic foam agent, determined the optimal dosage of foam agent and the properties of acid and alkali resistant and me- chanical. The results show that, the best dosage of organic, inorganic, composite foam agent is respectively 3.0%, 3.0%, 4.0%. The inorganic foam material has highest mechanical properties and water absorption, but its apparent density also high. The degradation of foam material reduced with the increase of pH value. FT-IR shows that organic, inorganic foam material substituted in position 5 and inorganic foam material with highest degree of crosslink. SEM shows that foam materials have obvious pore structure, but the structure is not uni- form, mainly due to the volatile bubble structure rupture in curing process. Inorganic foam material has better biocompatibility showed by DSC. TG displays the temperature of three kinds PAFM corresponding to the big- gest weight loss rate increased, at the same time degradation residues in turn reduce, thermal stability of inor- ganic foam material is better and its degradation is better. So the inorganic foam material has the best perform ance.

关 键 词：聚乙烯醇 碱木质素 淀粉 AC 发泡材料 

分 类 号：TB332[一般工业技术—材料科学与工程]