微生物絮凝剂絮凝胶清的研究
2015-02-15郭明万等
郭明万等
摘 要 采用一种微生物絮凝剂凝固胶清,确定其最佳用量的同时研究所得胶清橡胶的理化性能、硫化特性以及力学性能,并与硫酸凝固胶清橡胶进行对比。结果表明:微生物絮凝剂最佳用量为0.6g/L,与硫酸凝固胶清橡胶相比,微生物絮凝剂凝固的胶清橡胶具有较好的理化性能和力学性能,特别是抗氧化指数以及耐老化性能有明显的提升,同时具有较快的硫化速率。
关键词 微生物絮凝剂 ;胶清橡胶 ;性能
分类号 TQ333.99
Abstract This paper introduced that skim is flocculated by a microbial flocculant, the optimal dosage of microbial flocculant was determined, simultaneously, the physical and chemical properties, curing characteristics and mechanical properties of shim rubber coagulated by microbial flocculant were investigated, comprehensively, which compared with sulfuric acid coagulated skim rubber. The results showed that the optimal dosage of microbial flocculant was 0.6 g/L, the physical and chemical properties and mechanical properties especially antioxidant index and anti-aging properties of shim rubber coagulated by microbial flocculant were better than those of sulfuric acid coagulated skim rubber. As to the curing characteristics, the vulcanization rate of shim rubber coagulated by microbial flocculant was higher than that of sulfuric acid coagulated skim rubber.
Keywords microbial flocculant ; skim rubber ; properties
胶清是天然胶乳制备成浓缩胶乳时由离心机分离出来的副产品。胶清具有干胶含量低、非橡胶物质含量和氨含量高,在生产过程中一般都是直接加硫酸凝固。在20世纪中期,国内外专家[1]曾将氢氧化钠和硫酸锌、硫酸铝等盐类加入胶清,使之就地生成胶态氢氧化物,并沉淀在胶粒蛋白质层上形成絮凝。获得的絮凝胶清橡胶变异较小,但在高温下较易老化,并含有较多的灰分。张炼辉等[2]采用硫酸铝和三氯化铝加入胶清,制成的胶清橡胶除了灰分超标以外,其余指标都符合胶清橡胶一般标准。由于无机盐絮凝胶清达不到改善胶清橡胶的性能及提高其使用价值的目的,而微生物絮凝剂是一类由微生物或其分泌物产生的代谢产物,具有良好的絮凝作用和沉降效果,在工业领域有着广阔的开发应用前景[3]。因此本文通过加入一定量的微生物絮凝剂研究其对胶清絮凝效果和胶清橡胶性能的影响。
1 材料与方法……p>
