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为提高纸张中填料与纤维之间的结合力,用淀粉-脂肪酸制备了淀粉-填料合成物。这种合成物用作造纸填料可以改善纸张的物理性能、填料的留着率和施胶效果。实验显示,在70℃以下淀粉-脂肪酸合成物在水中的溶解量非常小,这使得淀粉-脂肪酸合成物很容易包覆在高岭土表面,以改进高岭土与纤维之间的结合能力。对高岭土-淀粉合成物在手抄片中加填的测试结果表明,相对未处理的高岭土,纸张的强度可提高100%到200%左右。当使用未改性的高岭土时,手抄片的z向边压强度随高岭土含量的增加而降低,但是当使用淀粉-脂肪酸合成物改性填料时,手抄片的z向边压强度随填料量的增加而增加。实验还发现,在合成物中由于脂肪酸的存在而增加了手抄片的抗水性能,因此这在造纸过程中有助于施胶效果。该文还通过扫描电镜研究了合成物和纤维之间填料的分布及结合特征。
To increase the binding between the filler and the fibers in the paper, a starch-filler composition was prepared using starch-fatty acid. The use of this composition as a paper filler can improve the physical properties of the paper, the retention of the filler and the sizing effect. Experiments have shown that starch-fatty acid compositions dissolve very little in water below 70 ° C, which allows the starch-fatty acid composition to easily coat the kaolin surface to improve the binding capacity of the kaolin to the fiber. The test results of the kaolin-starch composites in handsheet show that the strength of the paper can be increased by 100% to 200% relative to untreated kaolin. When unmodified kaolin was used, the z-lateral compressive strength of the hand-made sheet decreased with increasing kaolin content, but when modified with a starch-fatty acid composition, the z-lateral compressive strength of the hand- Increase in the amount of increase. Experiments also found that the water-repellency of the hand sheet was increased in the composition due to the presence of fatty acids, thus contributing to the sizing effect in the papermaking process. The article also studied the distribution and bonding characteristics of filler material between composites and fibers by scanning electron microscopy.