酚醛树脂/无皂苯丙复合乳液的制备及其对纸张的增强作用  

Preparation of phenolic resin/styrene-acrylate surfactant-free latex and its effect on paper strength

作　　者：李轩[1] 沈一丁[1] 费贵强 王海花[1] 孟祥青[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《功能材料》2012年第8期1064-1067,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50973057);陕西省13115重点资助项目(2009ZDKG-02)

摘　　要：以聚乙烯醇(PVA)为分散剂,苯乙烯(St)、丙烯酸丁酯(BA)、N-羟甲基丙烯酰胺(NMA)为主要单体,采用无皂种子乳液聚合法制备了稳定且性能优异的无皂苯丙乳液,以此与热固性酚醛树脂(PR)进行复配制得酚醛树脂/无皂苯丙复合乳液,讨论了其合成影响因素,并优化了合成工艺条件。研究表明,当m(PVA)=12%,软硬单体比例n(BA)/n(St)=1.0,m(NMA)=10%,m(酚醛树脂)/m(苯丙乳液)=2.0时,酚醛树脂/无皂苯丙复合乳液具有较好的增强作用。以质量分数为1.0%的聚合物乳液单独进行表面施胶时,纸张环压指数达8.4N.m/g,施胶度达32s。此复合乳液与淀粉有良好的适配性,并可取得优异的复合施胶效果。当m(复合乳液)/m(淀粉溶液)=0.3时,纸张环压指数达8.9N.m/g,施胶度达40s。并通过透射电镜(TEM)和扫描电镜(SEM)对其进行了表征。With polyvinyl alcohol （PVA） as polymeric colloid stabilizer, a kind of surfactant-free copolystyrene-acrylat latex with good stable and excellent property was successfully synthesized by reacting N-hydroxymethyl acrylamide （NMA）, styrene （St） and butyl acrylate （BA）. A kind of phenolic resin/styrene-acrylate surfactant- free latex was synthesized by styrene-acrylate latex and thermosetting phenolic resin. The factors affecting its synthetic condition were discussed, and the synthetic process was optimized. The results show that the compound emulsion owns excellent sizing property when m（PVA） = 12 μm（NMA） = 10 %,n（BA）/n（St） = 1.0 and m（PR）/m（SA） =2.0. The papers＇sizing value can reach 32s,ring crush index reach 8.4N · m/g with 1.0% compound emulsion addition. The matching of polymer emulsion with starch is favorable,and is endowed with excel- lent sizing performance. When m（CE）/m（SS）= 0.3, the papers＇ sizing value can reach 40s, ring crush index reach 8.9N · m/g. Finally,the polymer was characterized with TEM and SEM.

关 键 词：酚醛树脂 施胶度 苯丙乳液 环压强度 

分 类 号：TQ433.4[化学工程]