沙蒿胶及其羧甲基化改性产物的性能评价

为了把固沙植物沙蒿的种籽所提取的沙蒿胶开发作为水基压裂液增稠剂,评价了该植物胶及其改性产物的基本性能。结果表明,通过羧甲基化改性可使沙蒿胶的水不溶物含量由原来的55%降至4%,其表观粘度可提高两倍以上,且改性沙蒿胶的耐温性能和抗剪切性能也较好。但改性产物仍存在不易交联等缺陷,仍需对沙蒿胶的结构与性能作进一步的研究。     

Two new phenolic compounds from Artemisia sphaerocephala

Two new phenolic compounds were isolated from whole plant of Artemisia sphaerocephala. The structures were elucidated on the basis of spectroscopic methods as 4-(1-hydroxylethyl)-phenol-1-O-b-D-glucopyranoside and 4-O-acetophenone-b-D-gluco- pyranosyl-(1-3)-b-D-glucopyranoside.