片状无机纳米颗粒在AKD/水界面组装及其对AKD施胶的影响

AKD(Alkyl Ketene Dimer) is an effective sizing agent, it is supplied as a dispersion and usually suggested to be used in three months. The storage life is short and there are many problems in the traditional ASA emulsion, for example, the large amount of emulsifier, the pollution of environment. One of the hot research topics is to exploit the special emulsifier for AKD. The green emulsifier, which could promote efficiency of sizing, could advance the application of AKD in papermaking..In this project, AKD is used as oil phase, laponite nanoparticles is used as emulsifier, alanine is used as the wetting regulator of the laponite. It aims to clarify the adsorption of laponite in AKD/water interface, through analysis of different wettability properties of laponite; to elucidate the strength and stability of colloidosome by several areas, the wettability, aggregation and zeta potential of particles; to find out the stable condition of the AKD Pickering emulsion by detecting the break terms of the colloidosome; to illuminate the synergistic sizing mechanism by analyzing the AKD pickering sizing paper.

烷基烯酮二聚体（AKD）能够有效提高纸张施胶度，传统的AKD乳液采用阳离子淀粉或聚合物进行乳化,存在乳化剂用量大、成本昂贵、环境污染等问题，目前AKD专用乳化剂的开发和研制已经成为研究热点，清洁、环境亲和性高、对AKD施胶促进效果好的乳化剂具有广阔的应用前景。.本项目拟以AKD为油相，纳米固体颗粒锂皂石为乳化剂，丙氨酸为锂皂石的润湿性能调节剂，通过对不同润湿性能的锂皂石性能分析，阐明锂皂石在AKD-水界面吸附行为；通过对不同润湿性能、电荷特性、聚集形态锂皂石形成的胶体壳的分析，阐明纳米颗粒性质对胶体壳强度及稳定性的影响；通过对AKD液滴表面胶体壳破裂条件的研究，阐明锂皂石稳定的AKD乳液稳定环境；通过对锂皂石稳定的AKD乳状液施胶的纸页进行技术分析，阐明锂皂石与AKD在施胶过程中的协同施胶作用机理。

烷基烯酮二聚体（AKD）能够有效提高纸张施胶度，传统的AKD乳液采用阳离子淀粉或聚合物进行乳化,存在乳化剂用量大、成本昂贵、环境污染等问题，目前AKD专用乳化剂的开发和研制已经成为研究热点，清洁、环境亲和性高、对AKD施胶促进效果好的乳化剂具有广阔的应用前景。. 本项目以AKD为油相，纳米固体颗粒锂皂石为乳化剂，丙氨酸为锂皂石的润湿性能调节剂。通过对改性锂皂石润湿性、电荷性能、聚集性能等分析，明确了丙氨酸改性锂皂石双层吸附机理；通过锂皂石油水界面吸附性能分析，明确了锂皂石在油水界面吸附形成界面胶体壳机理；通过SEM、CLSM等分析，明确了丙氨酸改性锂皂石在AKD-水界面胶体壳的形貌；通过对不同pH值、电解质条件下形成的AKD乳液性能分析，明确了丙氨酸改性锂皂石稳定的AKD乳液性能变化规律；通过制备的AKD乳状液的施胶效果影响因素的分析，明确了锂皂石稳定的AKD乳液施胶作用规律。