羧基化纳米纤维素乳化马来松香甘油酯乳液稳定性及超疏水纸的制备  

Stability of carboxylated nanocellulose emulsified maleic rosin glyceride emulsions and preparation of superhydrophobic paper

作　　者：包康 景宜 王雯璐 张琦 花祥峰 BAO Kang;JING Yi;WANG Wenlu;ZHANG Qi;HUA Xiangfeng(College of Light Industry and Food,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]南京林业大学轻工与食品学院,江苏南京210037 [2]江苏省林业资源高效加工利用协同创新中心,江苏南京210037

出　　处：《精细化工》2024年第5期1116-1126,1151,共12页Fine Chemicals

基　　金：国家自然科学基金项目(31370583)。

摘　　要：采用溶剂助溶乳化法制备了马来松香甘油酯(MAP-DG)乳液,比较了十二烷基硫酸钠(SDS)、烷基酚聚氧乙烯醚(OP-10)和羧基化纳米纤维素(CNF-C)乳化MAP-DG乳液的粒径分布和稳定性。采用双道涂布的方式,机械浆纳米纤维素(CNF)和沉淀碳酸钙(PCC)作为第一道涂布,MAP-DG乳液作为第二道涂布,构建了超疏水性纸张。MAP-DG的最佳合成工艺条件为:m(马来松香)∶m(甘油)=1∶3,引发剂(偶氮二异丁腈)用量为0.40%(以马来松香质量为基准,下同),催化剂(纳米ZnO)用量为2.0%(以马来松香质量为基准,下同),在250℃下反应4 h。CNF-C作为乳化剂,制备的MAP-DG乳液平均粒径达到527 nm,在室温下静置90 d不破乳和分层。双层涂布制备的PCC/CNF/MAP-DG涂布纸与水的接触角为159.1°,表面吸水量(Cobb值)为2.4 g/m^(2),经过200次对折后仍具有超强的疏水性能,并且耐酸碱水溶液,具有良好的化学稳定性。纸张的超疏水性源于微米-纳米双级结构间滞留的空气对水滴的托举,在纸张纤维表面形成致密的疏水层。Maleic rosin glyceride(MAP-DG)emulsion was prepared from solvent-assisted solubilisation,and the particle size distribution and stability of MAP-DG emulsion with emulsification agent of sodium dodecyl sulphate(SDS),alkylphenol polyoxyethylene ether(OP-10)and carboxylated nanofibrillated cellulose(CNF-C)were then compared.The preparation process strategy for superhydrophobic paper was constructed using a two-layer coating method,with mechanically pulped nanocellulose(CNF)and precipitated calcium carbonate(PCC)as the first coat and MAP-DG emulsion as the second coat.Under the optimal conditions of m(maleic rosin)∶m(glycerol)=1∶3,initiator(azobisisobutyronitrile)dosage 0.40%(based on the mass of maleic rosin,the same below),catalyst(nano-ZnO)2.0%(based on the mass of maleic rosin,the same below),reaction temperature 250℃and reaction time 4 h,the MAP-DG emulsion prepared using CNF-C as emulsifier exhibited a particle size of 527 nm,and remained stable without emulsion breakage and delamination after storage at room temperature for 90 d.The PCC/CNF/MAP-DG coated paper prepared from double-layer coating,with a water contact angle of 159.1°and surface water absorption(Cobb value)of 2.4 g/m^(2),still retained its super-hydrophobicity after 200 folds,and was resistant to acid and alkali aqueous solutions,indicating good chemical stability.This super-hydrophobicity was attributed to the hold-up of water droplets by air trapped between the two-stage structure,forming a dense hydrophobic layer on the surface of paper fibers.

关 键 词：羧基化纳米纤维素 马来松香 甘油 涂布 超疏水纸 造纸化学品 

分 类 号：TS727.3[轻工技术与工程—制浆造纸工程] TQ352[化学工程]