High strength composites prepared by (A) mixing (1) an aqueous slurry of negatively charged, water-insoluble natural or synthetic fiber such as cellulose fiber, (2) a latex having a high density of pH independent cationic charges, such as sulfonium, bound at or near the particle surface, (3) a water-soluble, high molecular weight anionic polymer co-additive, such as a hydrolyzed polyacrylamide and optionally (4) conventional wet and additives; (B) draining water from the resulting aqueous suspension and (C) drying by heating.
通过以下方法制备高强度复合材料:(A)混合(1)带负电荷、不溶于
水的天然或合成纤维(如
纤维素纤维)的
水性浆料,(2)在颗粒表面或表面附近结合有高密度的与 pH 值无关的阳离子电荷(如锍)的胶乳,(3)
水溶性高分子量阴离子聚合物共添加剂(如
水解聚
丙烯酰胺),以及可选的(4)常规湿添加剂;(B)从所得
水性悬浮液中排
水,以及(C)加热干燥。