Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-Environment Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-Environment Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
Carbohydr Polym. 2021 Mar 1;255:117467. doi: 10.1016/j.carbpol.2020.117467. Epub 2020 Dec 1.
A hydroxyethyl cellulose-g-poly (butyl acrylate-co-vinyl acetate)(HEC-g-P (BA-co-VAc)) emulsion was synthesized by free radical emulsion polymerization method from hydroxyethyl cellulose (HEC), butyl acrylate (BA) and vinyl acetate (VAc) in the presence of emulsifier sodium dodecyl benzene sulfonate (SDBS). The structure, thermal stability and morphology of the emulsion were characterized by Fourier-transform infrared (FTIR), thermogravimetric analysis (TGA), transmission electron microscope (TEM) and other analytical techniques. The results proved that BA and VAc monomers had grafted with HEC. Its thermal stability was also significantly improved compared to HEC. Moreover, the prepared emulsion was evaluated to study the performance of preventing water leakage in soil. Compared with the published anti-leakage materials prepared by directly doping hydroxyethyl cellulose, the emulsion interacted with attapulgite to form a dense consolidation layer, which had better anti-leakage performance and water retention. Therefore, the material was more favorable for popularization and application in arid and semi-arid areas.
羟乙基纤维素接枝共聚（BA-co-VAc）乳液的合成（HEC-g-P（BA-co-VAc））由自由基乳液聚合方法从羟乙基纤维素（HEC），丙烯酸丁酯（BA）和醋酸乙烯酯（VAc）在乳化剂十二烷基苯磺酸钠（SDBS）的存在下。采用傅里叶变换红外（FTIR）、热重分析（TGA）、透射电子显微镜（TEM）等分析技术对乳液的结构、热稳定性和形态进行了表征。结果表明，BA 和 VAc 单体已接枝到 HEC 上。与 HEC 相比，其热稳定性也有了显著提高。此外，还对所制备的乳液进行了评价，以研究其在防止土壤渗漏方面的性能。与直接掺杂羟乙基纤维素制备的已发表的防漏材料相比，该乳液与凹凸棒土相互作用形成致密的固结层，具有更好的防漏性能和保水性能。因此，该材料在干旱和半干旱地区更有利于推广应用。
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