Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fiber reinforced clay aerogel composite material and preparation method thereof
The invention provides a fiber reinforced clay aerogel composite material and a preparation method thereof, the preparation method comprises the following steps: S1, uniformly dispersing fibers and clay in deionized water, and stirring and mixing to obtain a clay/fiber suspension; s2, PVA powder is dissolved in deionized water to form a PVA aqueous solution, then the PVA aqueous solution and the clay/fiber suspension are fully stirred and mixed, and homogeneous ternary hydrogel is obtained; s3, carrying out mold reversing and freezing on the mixed hydrogel; and S4, carrying out vacuum drying on the frozen gel sample to obtain the fiber-reinforced clay aerogel. The low density and low thermal conductivity of the clay aerogel are ensured while the mechanical strength of the clay aerogel is improved. Due to the introduction of the fibers, the flame retardant property of the composite aerogel is further improved. The fiber is used as a reinforcing phase, the PVA and the clay are used as matrixes, and the fiber, the PVA and the clay have good compatibility. The aerogel adopts a green and environment-friendly freeze-drying technology, is low in production cost, and can meet the requirements of safe and efficient heat preservation and heat insulation of buildings and aeronautics and astronautics.
本发明提供一种纤维增强粘土气凝胶复合材料及其制备方法，S1、将纤维与粘土均匀地分散在去离子水中，搅拌混合得到粘土/纤维悬浮液；S2、将PVA粉末溶解在去离子水中形成PVA水溶液，随后将PVA水溶液与粘土/纤维悬浮液充分搅拌混合，得到均质的三元水凝胶；S3、对混合水凝胶进行倒模、冷冻；S4、将冷冻的凝胶样品进行真空干燥，获得纤维增强的粘土气凝胶。本发明在提高粘土气凝胶力学强度的同时，保证了其低密度和低热导率。纤维的引入进一步提高了复合气凝胶的阻燃性能。本发明以纤维为增强相，PVA与粘土为基质，三者具有很好的兼容性。这种气凝胶采用绿色环保的冷冻干燥技术，生产成本低，可满足建筑、航空航天安全、高效的保温隔热需求。
Fiber reinforced clay aerogel composite material and preparation method thereof
The invention provides a fiber reinforced clay aerogel composite material and a preparation method thereof, the preparation method comprises the following steps: S1, uniformly dispersing fibers and clay in deionized water, and stirring and mixing to obtain a clay/fiber suspension; s2, PVA powder is dissolved in deionized water to form a PVA aqueous solution, then the PVA aqueous solution and the clay/fiber suspension are fully stirred and mixed, and homogeneous ternary hydrogel is obtained; s3, carrying out mold reversing and freezing on the mixed hydrogel; and S4, carrying out vacuum drying on the frozen gel sample to obtain the fiber-reinforced clay aerogel. The low density and low thermal conductivity of the clay aerogel are ensured while the mechanical strength of the clay aerogel is improved. Due to the introduction of the fibers, the flame retardant property of the composite aerogel is further improved. The fiber is used as a reinforcing phase, the PVA and the clay are used as matrixes, and the fiber, the PVA and the clay have good compatibility. The aerogel adopts a green and environment-friendly freeze-drying technology, is low in production cost, and can meet the requirements of safe and efficient heat preservation and heat insulation of buildings and aeronautics and astronautics.
本发明提供一种纤维增强粘土气凝胶复合材料及其制备方法，S1、将纤维与粘土均匀地分散在去离子水中，搅拌混合得到粘土/纤维悬浮液；S2、将PVA粉末溶解在去离子水中形成PVA水溶液，随后将PVA水溶液与粘土/纤维悬浮液充分搅拌混合，得到均质的三元水凝胶；S3、对混合水凝胶进行倒模、冷冻；S4、将冷冻的凝胶样品进行真空干燥，获得纤维增强的粘土气凝胶。本发明在提高粘土气凝胶力学强度的同时，保证了其低密度和低热导率。纤维的引入进一步提高了复合气凝胶的阻燃性能。本发明以纤维为增强相，PVA与粘土为基质，三者具有很好的兼容性。这种气凝胶采用绿色环保的冷冻干燥技术，生产成本低，可满足建筑、航空航天安全、高效的保温隔热需求。
Fiber reinforced clay aerogel composite material and preparation method thereof
一种纤维增强粘土气凝胶复合材料及其制备方法
LI ZHI (Autor:in) / WANG XIAOWU (Autor:in) / SUN MENGTIAN (Autor:in) / WANG YANG (Autor:in) / WANG GUICHAO (Autor:in) / SHEN KAI (Autor:in)
02.09.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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