A light, flexible superhydrophobic porous gas gel material and its preparation method
A gas gel and super-hydrophobic technology, applied in chemical instruments and methods, colloid chemistry, colloid chemistry, etc., can solve problems such as environmental pollution, unstable channels, increased density, etc., and achieve high softness, easy bending, The effect of high-efficiency hydrophobicity
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Embodiment 1
[0043] Step 1: Take 3.0g (0.05mol) of urea and 0.4g of cetyltrimethylammonium bromide (0.0011mol), add it to 7ml of 4mM butyl carboxylate ionic liquid (Ⅰ, where R=C 4 h 7 , denoted as ILC 4 ), mix well.
[0044] Step 2: Add 0.0105 mol methyltrimethoxysilane (MTMS) and 0.007 mol methyldimethoxysilane (DMDMS) to the mixed solution in the first step while stirring mechanically, and stir continuously for 30 minutes until the hydrolysis is complete.
[0045] The third step: transfer the mixed solution in the second step to a reaction kettle, and gel and age in an oven at 80° C. for 7 hours.
[0046] Step 4: Repeatedly washing with double distilled water and ethanol by manual immersion-extrusion, and drying at normal temperature and pressure to obtain a porous gas gel material. Recorded as: ILC 4 -MTMS-DMDMS.
[0047] Be the digital photo of the product gas gel material of this embodiment under fluorescent lamp as figure 1 shown. The size of the material obtained therein is 2...
Embodiment 2
[0051] Vinyltrimethoxysilane (VTMS) was used to replace methyltrimethoxysilane (MTMS) in Example 1, and other steps were the same as Example 1. Gained airgel material is denoted as: ILC 4 -VTMS-DMDMS. The gas gel material obtained after drying is respectively immersed in water and ethanol at normal temperature and pressure for secondary drying.
[0052] The size comparison digital photos of the product gas gel material of this embodiment before and after secondary drying under the fluorescent lamp are as follows: image 3 shown. The size of the material remains stable before and after secondary drying, indicating that the size of the airgel material is not affected by solution modification.
[0053] The scanning electron microscope picture of the product gas gel material of this embodiment is as follows Figure 4 shown. 4a is the scanning electron microscope picture of the preliminarily prepared air gel material; 4b is the scanning electron microscope picture of the second...
Embodiment 3
[0056] Methyltrimethoxysilane (MTMS) in Example 1 was replaced with methyltrimethoxysilane (MTMS) and trithiopropyltrimethoxysilane (MPTMS). Specific steps are as follows:
[0057] 1. Take urea 3.0 (0.05mol) g, cetyltrimethylammonium bromide (CTAB) 0.4g (0.0011mol), add to 7ml concentration is 4mML -1 Butyl carboxylic acid ionic liquid (ILC 4 ), mix well.
[0058] 2. While mechanically stirring the mixed solution in 1, add methyltrimethoxysilane (MTMS) and trimethoxypropyltrimethoxysilane (MPTMS, 0.00525mol) at a molar ratio of 1:1, and stir continuously for 30min until Hydrolysis is complete. Other steps are with embodiment 1. Gained airgel material is denoted as: ILC 4 -MTMS / MPTMS-DMDMS.
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