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Nano microcrystalline cellulose modified cement mortar composite material and preparation method thereof
The invention relates to a nano microcrystalline cellulose modified cement mortar composite material and a preparation method thereof. The preparation method comprises the following steps: (1) purifying, oxidizing and modifying commercial microcrystalline cellulose to obtain nano microcrystalline cellulose; (2) dispersing the nanocrystalline cellulose in an aqueous solution; and (3) uniformly mixing the nano microcrystalline cellulose dispersion liquid with cement and standard sand to obtain the nano microcrystalline cellulose modified cement mortar composite material. According to the prepared composite material, the nano microcrystalline cellulose is subjected to oxidation modification through hydrogen peroxide, so that the hydroxyl content is increased to improve the mechanical property, and the problem of agglomeration of the nano microcrystalline cellulose is solved to a certain extent; a proper amount of nano microcrystalline cellulose is added, so that the hydration degree of the cement mortar can be improved through hydroxyl water absorption and complexation reaction, the composition of hydration products is optimized, the porosity of the cement mortar is reduced, damage cracks are reduced, and the mechanical property of the cement mortar is improved.
本发明涉及一种纳米微晶纤维素改性水泥砂浆复合材料及制备方法，包括以下步骤：（1）商业微晶纤维素提纯氧化改性得到纳米微晶纤维素；（2）纳米微晶纤维素在水溶液中进行分散；（3）纳米微晶纤维素分散液与水泥和标准砂混合均匀后得到纳米微晶纤维素改性水泥砂浆复合材料。本发明制备的复合材料，通过过氧化氢对纳米微晶纤维素进行氧化改性，增加了羟基含量来提高机械性能，并在一定程度上解决了纳米微晶纤维素团聚问题，适量的纳米微晶纤维素添加量可通过羟基吸水和络合反应提高水泥浆体的水化程度，优化水化产物组成，降低水泥砂浆的孔隙度，减少损伤裂缝，提高水泥砂浆的力学性能。
Nano microcrystalline cellulose modified cement mortar composite material and preparation method thereof
The invention relates to a nano microcrystalline cellulose modified cement mortar composite material and a preparation method thereof. The preparation method comprises the following steps: (1) purifying, oxidizing and modifying commercial microcrystalline cellulose to obtain nano microcrystalline cellulose; (2) dispersing the nanocrystalline cellulose in an aqueous solution; and (3) uniformly mixing the nano microcrystalline cellulose dispersion liquid with cement and standard sand to obtain the nano microcrystalline cellulose modified cement mortar composite material. According to the prepared composite material, the nano microcrystalline cellulose is subjected to oxidation modification through hydrogen peroxide, so that the hydroxyl content is increased to improve the mechanical property, and the problem of agglomeration of the nano microcrystalline cellulose is solved to a certain extent; a proper amount of nano microcrystalline cellulose is added, so that the hydration degree of the cement mortar can be improved through hydroxyl water absorption and complexation reaction, the composition of hydration products is optimized, the porosity of the cement mortar is reduced, damage cracks are reduced, and the mechanical property of the cement mortar is improved.
本发明涉及一种纳米微晶纤维素改性水泥砂浆复合材料及制备方法，包括以下步骤：（1）商业微晶纤维素提纯氧化改性得到纳米微晶纤维素；（2）纳米微晶纤维素在水溶液中进行分散；（3）纳米微晶纤维素分散液与水泥和标准砂混合均匀后得到纳米微晶纤维素改性水泥砂浆复合材料。本发明制备的复合材料，通过过氧化氢对纳米微晶纤维素进行氧化改性，增加了羟基含量来提高机械性能，并在一定程度上解决了纳米微晶纤维素团聚问题，适量的纳米微晶纤维素添加量可通过羟基吸水和络合反应提高水泥浆体的水化程度，优化水化产物组成，降低水泥砂浆的孔隙度，减少损伤裂缝，提高水泥砂浆的力学性能。
Nano microcrystalline cellulose modified cement mortar composite material and preparation method thereof
一种纳米微晶纤维素改性水泥砂浆复合材料及制备方法
BAI JIAN (author) / YUAN YE (author) / LUO XIAOQUAN (author) / WANG XINYANG (author) / WU HONGLIN (author) / FANG YIKUN (author) / YU ZHENGYU (author) / JIA XUAN (author) / SANG GUOQING (author) / XU ZHENGHE (author)
2024-04-09
Patent
Electronic Resource
Chinese
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