Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Enzyme modified halloysite nanotube as well as preparation method and application thereof
The invention discloses an enzyme modified halloysite nanotube as well as a preparation method and application thereof. The preparation method comprises the following steps: adjusting the pH value of a urease solution to 5.5-6.5 by using acid, mixing halloysite nanotubes and the urease solution in a vacuum flask according to a solid-liquid mass ratio of 1:(3-5), performing full stirring, vacuumizing the vacuum flask for 1-2 hours, and sequentially carrying out suction filtration, washing, drying and grinding on a mixture in the vacuumized vacuum flask to obtain the enzyme modified halloysite nanotube. The enzyme modified halloysite nanotube and the urea are added into the concrete as admixtures, the urea is decomposed into CO3<2-> and NH4<+> through urease, Ca<+> in the concrete can be effectively solidified, the concrete alkali-aggregate reaction is inhibited, and the halloysite nanotube can also limit the development of microcracks in the concrete. The halloysite nanotube is utilized to firmly adsorb urease in the nanotube, so that the stability problem of the urease in the concrete is solved, and the urease can be fully dispersed in the concrete.
本发明公开一种酶改性埃洛石纳米管及其制备方法与应用。该制备方法包括：用酸调节脲酶溶液的pH值为5.5～6.5，按固液质量比为1：3～5将埃洛石纳米管和脲酶溶液混合于真空瓶中，并充分搅拌后将真空瓶抽真空1～2小时，将抽真空后的真空瓶中混合物依次进行抽滤、洗涤、干燥、研磨，得到酶改性埃洛石纳米管。本发明将酶改性埃洛石纳米管和尿素作为掺合料加入到混凝土中，通过脲酶将尿素分解成CO32‑和NH4+，能有效固结混凝土中的Ca+，起到抑制混凝土碱‑骨料反应，埃洛石纳米管还能限制混凝土内部微裂缝的发展。利用埃洛石纳米管将脲酶牢固地吸附在纳米管中，解决了酶在混凝土中的稳定性问题，并使脲酶能充分分散在混凝土中。
Enzyme modified halloysite nanotube as well as preparation method and application thereof
The invention discloses an enzyme modified halloysite nanotube as well as a preparation method and application thereof. The preparation method comprises the following steps: adjusting the pH value of a urease solution to 5.5-6.5 by using acid, mixing halloysite nanotubes and the urease solution in a vacuum flask according to a solid-liquid mass ratio of 1:(3-5), performing full stirring, vacuumizing the vacuum flask for 1-2 hours, and sequentially carrying out suction filtration, washing, drying and grinding on a mixture in the vacuumized vacuum flask to obtain the enzyme modified halloysite nanotube. The enzyme modified halloysite nanotube and the urea are added into the concrete as admixtures, the urea is decomposed into CO3<2-> and NH4<+> through urease, Ca<+> in the concrete can be effectively solidified, the concrete alkali-aggregate reaction is inhibited, and the halloysite nanotube can also limit the development of microcracks in the concrete. The halloysite nanotube is utilized to firmly adsorb urease in the nanotube, so that the stability problem of the urease in the concrete is solved, and the urease can be fully dispersed in the concrete.
本发明公开一种酶改性埃洛石纳米管及其制备方法与应用。该制备方法包括：用酸调节脲酶溶液的pH值为5.5～6.5，按固液质量比为1：3～5将埃洛石纳米管和脲酶溶液混合于真空瓶中，并充分搅拌后将真空瓶抽真空1～2小时，将抽真空后的真空瓶中混合物依次进行抽滤、洗涤、干燥、研磨，得到酶改性埃洛石纳米管。本发明将酶改性埃洛石纳米管和尿素作为掺合料加入到混凝土中，通过脲酶将尿素分解成CO32‑和NH4+，能有效固结混凝土中的Ca+，起到抑制混凝土碱‑骨料反应，埃洛石纳米管还能限制混凝土内部微裂缝的发展。利用埃洛石纳米管将脲酶牢固地吸附在纳米管中，解决了酶在混凝土中的稳定性问题，并使脲酶能充分分散在混凝土中。
Enzyme modified halloysite nanotube as well as preparation method and application thereof
一种酶改性埃洛石纳米管及其制备方法与应用
WANG JUNFENG (Autor:in) / FANG YUAN (Autor:in) / YIN XIAOHONG (Autor:in) / HE KEZE (Autor:in) / LIN CHEN (Autor:in) / LU LIULEI (Autor:in)
24.09.2021
Patent
Elektronische Ressource
Chinesisch
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