TAPPI JOURNAL 2018年第10期目次

TABLE OF CONTENTS, TAPPI JOURNAL October,2018

关键词:  生物基胶乳  丁苯胶乳  羟乙基淀粉  血清置换  粒径

Key Words:biobased latex  styrene-butadiene latex  hydroxyethylated starch  serum replacement  particle size

摘要:本实验建立在之前对含淀粉乳胶涂料的流变特性和动态保水性的研究成果基础之上。前期研究表明，淀粉胶乳的流变性和动态保水性不同于传统熟化涂布淀粉。本实验采用血清置换法研究了水膨胀淀粉纳米粒子的基本性能及其胶体行为。结果表明，淀粉胶乳是由微粒和少量可溶性聚合物组成的复杂体系。提高交联度会减少可溶性组分，并降低分散黏度。实验室圆柱形涂布机形成的涂层显示，丁苯胶乳具有可塑性，在压光过程中起到润滑剂的作用，有助于提高纸张光泽度。将生物胶乳与羟乙基淀粉（接枝聚合物）交联可以提高涂料的保水性，但是低交联Bio-A的使用则会降低涂布纸的光泽度。

Abstract:This paper builds upon the findings of previous work on the rheological properties and dynamic water retention properties of starch latex-containing coating colours. The previous work showed that the rheological performance of starch latex and dynamic water retention of starch latex are different from conventional cooked coating starches. In this paper, the basic nature of water-swollen starch nanoparticles and their colloidal behaviourare investigated using serum replacement. Serum replacement experiments showed that starch latexes are complex systems of particles and a minor fraction of soluble polymers. Increasing the degree of crosslinking decreased the soluble fraction and lowered the dispersion viscosity. Coatings applied using a cylindrical laboratory coater showed the plasticity of SB latexes acted as a lubricant during calendering and aided to improve gloss. Crosslinked biobased latexes and hydroxyethylated starch (graft polymers)improved water retention, but the use of low crosslinked Bio-A was found to lower gloss.