超细碳酸钙原位改性苎麻纤维的工艺优化

Process Optimization of Ultrafine Calcium Carbonate In-situ Modification of Ramie Fiber

采用离子溶液原位沉积法将超细碳酸钙沉积于苎麻纤维表面,探究了反应温度、离子溶液浓度、反应时间、分散剂EDTA-2Na用量对制备超细碳酸钙改性苎麻纤维的工艺影响,并对改性纤维表面结构和性质进行表征。结果表明,碱性前处理对纤维造成了损伤,提高了改性纤维表面碳酸钙的附着量,经过改性处理后的苎麻纤维表面粗糙度增加;正交试验后的优化工艺为:温度为40℃,离子溶液浓度为0.5mol/L,分散剂EDTA-2Na用量为4g/L。

In order to improve interfacial property between ramie fiber and resin matrix, ultrafine calcium carbonate was deposited in-situ on ramie fiber surface to realize the modification of the surface. Reaction temperature and time, ionic solution concentration, and dosage of dispersant EDTA-2 Na were taken into account in the investigation of the preparation process of superfine calcium carbonate modified ramie fiber. The surface structure and properties of the modified fiber were then characterized accordingly. The results show that the pretreatment of alkali has damaged the fiber but also increased the adhesion of calcium carbonate on the surface of modified fiber. The surface roughness of ramie fiber was increased after modified treatment. Orthogonal test determined the optimization conditions for the modification, which are: reaction time of 30 min, reaction temperature of 40℃, ionic solution concentration of 0.5 mol/l, dispersant EDTA-2 Na dosage of 4 g/L.