论文部分内容阅读
研究了竹浆黑液混凝土高效减水剂(GCL1-JB)的结构和吸附特征.将GCL1-JB先通过超滤和离子交换树脂提纯,再通过凝胶柱层析分级,然后选择4种窄分子量分布的GCL1-JB级分进行结构表征和吸附研究.结果表明,GCL1-JB具有高分子量和高磺化度的结构特征.不同分子量级分的GCL1-JB的化学分子结构相似,但其中磺酸基含量随着分子量增大而减少,而芳香环含量随着分子量增大而增大.GCL1-JB在阳离子表面能形成平整的自组装吸附膜,其中高分子量级分的GCL1-JB因磺酸基含量较低,分子较卷曲,故吸附量较大.
The structure and adsorption characteristics of GCL1-JB were studied.The GCL1-JB was first purified by ultrafiltration and ion exchange resin, and then fractionated by gel column chromatography, and then four narrow The GCL1-JB molecular weight distribution of GCL1-JB fractions were characterized by X-ray diffraction and adsorption studies.The results showed that GCL1-JB possesses the structural characteristics of high molecular weight and high degree of sulfonation.The chemical structure of GCL1-JB with different molecular weight fractions is similar, The content of acid group decreases with the increase of molecular weight, while the content of aromatic ring increases with the increase of molecular weight.GCL1-JB can form a flat self-assembled adsorption film on the surface of cation, GCL1-JB with high molecular weight fraction Lower acid content, molecules more curly, so a larger amount of adsorption.