Preparation method for high-strength hydrophobic polyvinyl alcohol composite sponge

A technology of composite sponge and polyvinyl alcohol, which is applied in separation methods, chemical instruments and methods, and liquid separation, can solve the problems of unfavorable material salvage, storage and transportation, poor mechanical strength, etc., and achieves simple methods, high oil absorption efficiency, and good The effect of acid and alkali resistance

Active Publication Date: 2017-10-03
THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a high-strength hydrophobic polyvinyl alcohol composite sponge, which aims to solve the pr

Method used

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  • Preparation method for high-strength hydrophobic polyvinyl alcohol composite sponge
  • Preparation method for high-strength hydrophobic polyvinyl alcohol composite sponge
  • Preparation method for high-strength hydrophobic polyvinyl alcohol composite sponge

Examples

Experimental program
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Example Embodiment

[0031] Such as figure 1 As shown, the preparation method of the high-strength hydrophobic polyvinyl alcohol composite sponge provided by the embodiment of the present invention includes the following steps:

[0032] S101: Weigh 10g of distilled water and add it to 90g of ethanol, and stir evenly;

[0033] S102: Weigh 2~6g of ethyl orthosilicate (TEOS) and 1~4g of γ-(2,3-glycidoxy)propyltrimethoxysilane (GPTMS) and add them to the mixed solution;

[0034] S103: Measure 4 mL of ammonia solution, add it to the above mixed solution, stir and react at room temperature for 2-10 hours to obtain modified G-SiO with uniform particle size distribution 2 Sol

[0035] S104: Soak a small piece of PVA sponge (5×5×2cm) in G-SiO 2 In the sol for 10 to 90 minutes, one dipping and one rolling, with a liquid rate of 60 to 80 wt%, then put it in an oven and keep it at 60 to 90°C for 10 to 30 minutes;

[0036] S105: Weigh 2~5g of hexadecyltrimethoxysilane (HDTMS) and add it to 100g of ethanol solution, then...

Example Embodiment

[0045] Example 1

[0046] (1) Weigh 10g of distilled water and add it to 90g of ethanol and stir evenly;

[0047] (2) Weigh 2 g of ethyl orthosilicate (TEOS) and 1 g of γ-(2,3-glycidoxy)propyltrimethoxysilane (GPTMS) and add them to the mixed solution of (1);

[0048] (3) Measure 2mL ammonia solution, add it to the above mixed solution, stir and react for 2h at room temperature to obtain modified G-SiO with uniform particle size distribution 2 Sol

[0049] (4) Soak a small piece of PVA sponge (10×10×2cm) in the G-SiO of (3) 2 In the sol for 30 minutes, one dipping and one rolling, with a liquid rate of 70wt%, then put it in an oven and keep it at 60°C for 30 minutes;

[0050] (5) Weigh 2 g of hexadecyltrimethoxysilane (HDTMS) and add it to 100 g of ethanol solution, then add 0.1 mL of concentrated hydrochloric acid, and stir at room temperature for 30 minutes to obtain a hydrolysate;

[0051] (6) Soak the PVA sponge obtained in (4) in the hydrolyzed solution of (5) for 1 hour, one dippin...

Example Embodiment

[0053] Example 2

[0054] (1) Weigh 10g of distilled water and add it to 90g of ethanol and stir evenly;

[0055] (2) Weigh 3g of ethyl orthosilicate (TEOS) and 2g of γ-(2,3-glycidoxy)propyltrimethoxysilane (GPTMS) and add them to the mixed solution of (1);

[0056] (3) Measure 4mL ammonia solution, add it to the above mixed solution, stir and react for 4h at room temperature to obtain modified G-SiO with uniform particle size distribution 2 Sol

[0057] (4) Soak a small piece of PVA sponge (5×5×1cm) in the G-SiO of (3) 2 In the sol for 60 minutes, one dipping and one rolling, with a liquid rate of 75wt%, then put it in an oven and keep it at 90°C for 10 minutes;

[0058] (5) Weigh 5g of hexadecyltrimethoxysilane (HDTMS) and add it to 100g of ethanol solution, then add 0.5mL of concentrated hydrochloric acid, and stir for 20min at room temperature to obtain a hydrolyzed solution;

[0059] (6) Soak the PVA sponge obtained in (4) in the hydrolyzed solution of (5) for 2h, one dipping and on...

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Abstract

The invention discloses a preparation method for a high-strength hydrophobic polyvinyl alcohol composite sponge. A two-step solution impregnation method is employed in the invention and comprises the following steps: with 2 to 6 wt% ethyl orthosilicate and 1 to 4 wt% of gamma-(2,3-epoxypropoxy)propyltrimethoxysilane as raw materials, a mixture of ethanol and water in a mass ratio of 9: 1 as a solvent, 2 to 6 v/v% of ammonia water as a catalyst, carrying out a stirring reaction at room temperature for 2 to 10 h so as to prepare a G-SiO2 sol and subjecting a sponge to impregnation and deposition so as to construct a rough structure; and with 2 to 8 wt% of hexadecyltrimethoxysilane as a surface modifier and 0.1 to 1 v/v% of hydrochloric acid as a catalyst, subjecting the sponge to hydrophobic and low-surface-energy modification. The hydrophobic PVA sponge provided by the invention has good acid and alkali resistance, good high-salinity resistance and high oil absorption rate and can be repeatedly used 20 times or more.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl alcohol composite sponge preparation, and in particular relates to a preparation method of high-strength hydrophobic polyvinyl alcohol composite sponge. Background technique [0002] Frequent oil spills and oil spill accidents have brought serious damage to the marine environment and coastal people's lives. Oil-water separation materials with high absorption capacity, high selectivity and good reusability have attracted widespread attention in the world. In particular, efficient and reusable oil-absorbing materials prepared from three-dimensional porous materials have become a hot spot in current research, such as CNT sponges ([J]. Advanced Materials, 2010, 22(22): 617-21), CMP airgel ([J]. Adv. Mater. 2014, 26, 8053), graphene sponge ([J]. Nature Communications, 2015, 6: 6141-6141), etc. However, these methods have disadvantages such as high cost, relatively low efficiency, poor mechanical sta...

Claims

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Application Information

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IPC IPC(8): C08J9/40B01D17/022C08L29/04
CPCB01D17/0202C08J9/40C08J2329/04
Inventor 林凌朱忆徐长安唐旭刘源森
Owner THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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