Polylactic Acid Improves the Rheological Properties, and Promotes the Degradation of Sodium Carboxymethyl Cellulose-Modified Alkali-Activated Cement
Polylactic Acid Improves the Rheological Properties, and Promotes the Degradation of Sodium Carboxymethyl Cellulose-Modified Alkali-Activated Cement
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聚乳酸改善羧甲基纤维素钠改性碱激活水泥的流变性能并促进降解
DOI：
10.3390/en9100823
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发表时间：
2016-10
期刊：
影响因子：
3.2
通讯作者：
Xia Bairu
中科院分区：
文献类型：
--
作者：
Tan Huijing;Zheng Xiuhua;Duan Chenyang;Xia Bairu
考虑到聚乳酸（PLA）不溶于水、对热敏感以及作为一种可降解添加剂在石油天然气工业中的广泛应用，本文将其引入到一种自降解临时密封材料（SDTSM）中，研究PLA对SDTSM性能的影响，并评价其改善材料流变性能和进一步促进材料自降解的潜力。测试了PLA的热降解性能、不同PLA用量的SDTSM的流变性能、压缩强度、水化产物和吸水率。结果表明，与不含PLA的SDTSM相比，加入2%的PLA使SDTSM的流动性提高了13.18%，塑性粘度降低了38.04%。PLA的加入提高了200 ° C固化的SDTSM的吸水率，对SDTSM的类型影响不大，但减少了85 ° C固化的SDTSM的水化产物，并在200 ° C固化的SDTSM中产生了大量的孔隙。PLA通过在水泥中产生大量孔隙，提高了SDTSM的自降解水平。这些孔隙以两种方式起作用：一是大量的孔隙导致了微观结构的松散;二是这些孔隙使水更容易渗透到水泥中，从而使物质在200 ° C加热的SDTSM中溶解更快，产生热量，破坏微观结构。
In consideration of the insolubility in water, sensitivity to heat and wide application in the oil and gas industry as a degradable additive, this paper introduces polylactic acid (PLA) to a self-degradable temporary sealing material (SDTSM) to investigate its effect on the SDTSM performance and evaluate its potential to improve the rheological properties and further promote the self-degradation of the material. The thermal degradation of PLA, the rheological properties, compressive strength, hydrated products and water absorption of SDTSMs with different PLA dosages were tested. The analysis showed that the addition of 2% PLA increased the fluidity by 13.18% and reduced the plastic viscosity by 38.04%, when compared to those of the SDTSM without PLA. PLA increased the water absorption of 200 °C-heated SDTSM and had small effect on the types but decreased the hydrate products of 85 °C-cured SDTSM, and created plenty of pores in 200 °C-heated SDTSM. PLA enhanced the self-degradation level of SDTSM by generating a large amount of pores in cement. These pores worked in two ways: one was such a large amount of pores led to a looser microstructure; the other was these pores made the water impregnate the cement more easily, and then made the dissolution of substances in the 200 °C-heated SDTSM progress faster to generate heat and to destruct the microstructure.
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影响因子：
1.5
作者：
S. Akther;J. Hwang;H. Lee
通讯作者：
S. Akther;J. Hwang;H. Lee
影响因子：
5.3
作者：
Dharmalingam, Sathiskumar;Hayes, Douglas G.;Wszelaki, Annette L.
通讯作者：
Wszelaki, Annette L.
DOI：
--
发表时间：
2009
期刊：
--
影响因子：
--
作者：
S. Thokchom;P. Ghosh;Somnath Ghosh
通讯作者：
S. Thokchom;P. Ghosh;Somnath Ghosh
影响因子：
11.1
作者：
Abdalqader, Ahmed F.;Jin, Fei;Al-Tabbaa, Abir
通讯作者：
Al-Tabbaa, Abir
影响因子：
9.7
作者：
Y. Zuo;Fang Yang;J. Wolke;Yubao Li;J. Jansen
通讯作者：
Y. Zuo;Fang Yang;J. Wolke;Yubao Li;J. Jansen