A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of modified brucite fiber exterior wall repairing material
The invention relates to a preparation method of a modified brucite fiber exterior wall repairing material, which comprises the following steps: adding toluene diisocynate, glycerol and dibenzoyl peroxide into a three-neck flask, heating to 90-100 DEG C, fully mixing under high-speed stirring, then adding tetrahydrofuran and dibutyltin dilaurate, heating to 110-120 DEG C under the protection of N2, and continuously stirring; and adding a pH regulator, cooling to 60-70 DEG C, dropwise adding ethylenediamine and dodecylbenzene sulfonic acid while stirring, standing for 20-30 minutes after dropwise adding, carrying out reduced pressure suction filtration on a reaction solution after reaction, heating a filtrate to 120-130 DEG C at a heating speed of 10-15 DEG C/min, carrying out heat preservation for 2-3 hours, and cooling to room temperature to obtain a surface modifier. Free radicals on the surface of the modified brucite fiber form an active site with rich hydroxyl groups, so that the interface hydrophilicity and wettability of the brucite fiber are improved, the dispersity of the modified brucite fiber in a concrete matrix is remarkably improved, a fiber reinforced network is formed, and agglomeration and sedimentation phenomena are avoided within a relatively long time.
一种改性水镁石纤维外墙修补材料的制备方法，将甲苯二异氰酸酯，丙三醇和过氧化二苯甲酰加入三口烧瓶中，温度升高至90‑100℃，在高速搅拌下充分混合，然后加入四氢呋喃和二月桂酸二丁基锡，在N2保护条件下，加温至110‑120℃，持续搅拌；之后加入pH调节剂，之后将温度降至60‑70℃，边搅拌边滴加乙二胺和十二烷基苯磺酸，滴加完成后，静置20‑30分钟，反应结束后，将反应液进行减压抽滤，将滤液升温至120‑130℃，升温速度为10‑15℃/分钟，保温2‑3小时，之后冷却至室温，得到表面改性剂，改性后水镁石纤维表面自由基形成活性位具有丰富羟基基团提高水镁石纤维的界面亲水性和浸润性，这样改性后的水镁石纤维在混凝土基体中的分散性显著提高，形成了纤维增强网络，在较长时间内不会团聚和沉降现象。
Preparation method of modified brucite fiber exterior wall repairing material
The invention relates to a preparation method of a modified brucite fiber exterior wall repairing material, which comprises the following steps: adding toluene diisocynate, glycerol and dibenzoyl peroxide into a three-neck flask, heating to 90-100 DEG C, fully mixing under high-speed stirring, then adding tetrahydrofuran and dibutyltin dilaurate, heating to 110-120 DEG C under the protection of N2, and continuously stirring; and adding a pH regulator, cooling to 60-70 DEG C, dropwise adding ethylenediamine and dodecylbenzene sulfonic acid while stirring, standing for 20-30 minutes after dropwise adding, carrying out reduced pressure suction filtration on a reaction solution after reaction, heating a filtrate to 120-130 DEG C at a heating speed of 10-15 DEG C/min, carrying out heat preservation for 2-3 hours, and cooling to room temperature to obtain a surface modifier. Free radicals on the surface of the modified brucite fiber form an active site with rich hydroxyl groups, so that the interface hydrophilicity and wettability of the brucite fiber are improved, the dispersity of the modified brucite fiber in a concrete matrix is remarkably improved, a fiber reinforced network is formed, and agglomeration and sedimentation phenomena are avoided within a relatively long time.
一种改性水镁石纤维外墙修补材料的制备方法，将甲苯二异氰酸酯，丙三醇和过氧化二苯甲酰加入三口烧瓶中，温度升高至90‑100℃，在高速搅拌下充分混合，然后加入四氢呋喃和二月桂酸二丁基锡，在N2保护条件下，加温至110‑120℃，持续搅拌；之后加入pH调节剂，之后将温度降至60‑70℃，边搅拌边滴加乙二胺和十二烷基苯磺酸，滴加完成后，静置20‑30分钟，反应结束后，将反应液进行减压抽滤，将滤液升温至120‑130℃，升温速度为10‑15℃/分钟，保温2‑3小时，之后冷却至室温，得到表面改性剂，改性后水镁石纤维表面自由基形成活性位具有丰富羟基基团提高水镁石纤维的界面亲水性和浸润性，这样改性后的水镁石纤维在混凝土基体中的分散性显著提高，形成了纤维增强网络，在较长时间内不会团聚和沉降现象。
Preparation method of modified brucite fiber exterior wall repairing material
一种改性水镁石纤维外墙修补材料的制备方法
WANG XIAODONG (author)
2021-07-20
Patent
Electronic Resource
Chinese
Preparation method of natural brucite fiber modified lime-metakaolin composite mortar
| European Patent Office | 2020