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异氰酸酯改性竹材表面及其抗蚀性能研究
Authors
唐兴
孙勇
+3 more
曾宪海
林鹿
高和
Publication date
1 February 2019
Publisher
Abstract
以异氰酸酯对竹材表面进行接枝改性,大幅提升了天然竹材的抗蚀性能。研究中分别以热水预处理竹材(H-bam)和碱预处理竹材(A-bam)为原料,采用二环己甲烷4,4′-二异氰酸酯(HMDI)为改性剂,得到改性竹材样品H-HMDI-bam和A-HMDI-bam。抗蚀机制研究表明:改性后竹材表面的羟基数量明显减少,羰基、酰胺官能团增加,HMDI成功接枝到纤维表面并成絮状包裹状,A-HMDI-bam和H-HMDI-bam的负载量分别为6.342和4.080 mmol/cm~2。改性样品疏水性明显增强,其中H-HMDI-bam表现优异,吸水率由原料的68.7%下降到35.5%,孔径和孔体积大幅下降到33.48 nm和0.039 0 cm~3/g。SEM观察表明H-HMDI-bam样品无明显被腐蚀的痕迹,腐蚀等级为0~1级,与工业传统炭化抗腐处理工艺水平相当。国家自然科学基金资助项目(21776234);;中国石油天然气集团有限公司创新基金(2018D-5007-0503
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Last time updated on 20/11/2020