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自组装的丝纤维素与基尼补充剂交叉连接建筑材料中的微生物碳酸盐沉

Jiayu Li^1,2, Varenyam Achal^1,2

¹Department of Environmental Science and Engineering, Guangdong Technion-Israel Institute of Technology, Shantou, Guangdong, China.

Environmental microbiology reports

|October 10, 2023

概括

这项研究使用微生物诱导碳酸盐沉 (MICP) 和丝纤维素 (SF) 增强了沙子的工程性质. Genipin交叉连接的SF显著提高了沙子的压力强度和石含量,提供了可持续的建筑材料解决方案.

科学领域:

材料科学材料科学材料科学
生物技术是生物技术.
土木工程土木工程是指土木工程.

背景情况:

微生物诱导碳酸盐沉 (MICP) 增强了建筑材料的性能.
丝纤维素 (SF) 也显示出提高材料工程特性的潜力.
结合MICP和SF为材料增强提供了一种新的方法.

研究的目的:

研究MICP和丝纤维素 (SF) 对沙子工程性能的协同作用.
评估基尼交叉链接对细菌溶液中SF性能的影响.
探索这种复合材料在开发低碳水泥基材料方面的潜力.

主要方法:

在Nutri-Calci介质中利用生产尿素酶的Bacillus megaterium用于MICP.
优化基尼度 (3.12 mg/mL) 用于在细菌溶液中交联SF.
使用FTIR,SEM,XRD和XPS准备的砂模和分析的压力强度,石含量和材料组成.

主要成果:

与细菌溶液中的基尼交叉连接的SF显著增加了沙模具的压力强度,与单独的SF相比增加了35%,与单独的细菌溶液相比增加了55%.
在用基尼交叉连接的SF.处理的沙子中观察到更高的石含量.
FTIR,SEM,XRD和XPS分析证实,基因交叉连接的SF增强了生物矿物沉.

结论:

基尼平交叉连接提高了SF在MICP过程中的有效性,以改善沙子的工程性质.
这种综合方法为开发可持续的低碳水泥复合材料提供了有希望的途径.
该研究强调了生物灵感材料在先进建筑应用中的潜力.

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