An interior latex paint was simplified by using soy protein (SP) to replace hydroxyl ethyl cellulose (HEC) thickener, rheological modifier, and calcium carbonate. The rheological and solid-state properties of the latex paints were investigated. The SP paint had similar viscosity characteristics as that of the HEC paint for practical applications. Strain sweep experiments show that the SP paint has less antisettling characteristic compared to the HEC paint. The dispersion structure of the SP paint is less flexible than that of the HEC paint, but has similar strength at large strain. The values of storage moduli at very low frequency indicate both the HEC and SP paints have a long-term stability. The SP paint had a slower recovery rate after high shear compared to the HEC paint, indicating that the SP paint will have better leveling, but slightly more sagging during application. The dried SP paint had a greater storage modulus than the HEC paint under ambient temperature. The SP paint also had a higher glass transition temperature, indicating a greater ability of protein to immobilize polymer latex. The magnitude of G′ shows that the SP paint is more rigid than the HEC paint. The hardness test shows that the SP paint had a greater hardness than the HEC paint.

通过使用大豆蛋白 (SP) 代替羟乙基纤维素 (HEC) 增稠剂、流变改性剂和碳酸钙，简化了内部乳胶漆。研究了乳胶漆的流变特性和固态特性。在实际应用中，SP 涂料具有与 HEC 涂料相似的粘度特性。应变扫描实验表明，与 HEC 涂料相比，SP 涂料的抗沉降特性较差。SP涂料的分散结构不如HEC涂料的柔韧性好，但在大应变下具有相似的强度。极低频率下的储能模量值表明 HEC 和 SP 涂料都具有长期稳定性。与HEC涂料相比，SP涂料在高剪切后的恢复速度更慢，说明SP涂料的流平性更好，但在使用过程中稍微下垂。在环境温度下，干燥的 SP 涂料比 HEC 涂料具有更大的储能模量。SP 涂料还具有更高的玻璃化转变温度，表明蛋白质固定聚合物胶乳的能力更强。G' 的大小表明 SP 涂料比 HEC 涂料更硬。硬度测试表明，SP漆比HEC漆具有更大的硬度。