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Method for grafting mesoporous silica gel on fiber through calcium ion crosslinking

A calcium ion cross-linking and calcium ion technology, applied in the direction of fiber type, fiber processing, textile and paper making, etc., can solve the problems of limited fiber, difficult grafting rate, complicated fiber grafting silica gel process, etc., and achieve high biocompatibility Sexual, easy-to-use effects

Inactive Publication Date: 2011-05-18
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the technical problems to be solved by the present invention are complex fiber grafting silica gel process, difficulty in controlling the grafting rate, limited choice of fibers, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. A kind of calcium ion cross-linked mesoporous silica gel grafted on polypropylene fiber non-woven fabric

[0020] Reference patent 200910228776.8 prepares polypropylene fiber non-woven fabric grafted with polyacrylic acid, and after neutralization treatment with sodium hydroxide, obtains polypropylene fiber non-woven fabric grafted with sodium polyacrylate;

[0021] Prepare the mixed aqueous solution of 0.5% sodium silicate and 1% sodium carbonate by mass percentage, and prepare the calcium chloride aqueous solution with 0.5% concentration by mass percentage;

[0022] Soak the fibers of the above-mentioned grafted sodium polyacrylate into the prepared sodium silicate mixed aqueous solution for 0.5 hours, take it out and drip for 2 minutes, use absorbent paper to absorb the excess solution attached, so that the adhesion liquid on the surface of the fiber is as uniform as possible, Immediately put it into the prepared calcium chloride aqueous solution, cross-li...

Embodiment 2

[0024] Example 2. A calcium ion cross-linked mesoporous silica gel grafted on polypropylene monofilament fibers

[0025] Refer to patent 200910228776.8 to prepare polypropylene monofilament fibers grafted with polyacrylic acid, and neutralize them with sodium hydroxide to obtain polypropylene monofilament fibers grafted with sodium polyacrylate;

[0026] Prepare a mixed aqueous solution of 0.5% sodium silicate and 1% diammonium hydrogen phosphate by mass percentage, and prepare an aqueous calcium chloride solution with a mass percentage concentration of 0.5%;

[0027] Soak the above-mentioned polypropylene monofilament fiber grafted with sodium polyacrylate into the prepared sodium silicate mixed aqueous solution for 0.5 hours, take it out and drip it for 2 minutes, use absorbent paper to absorb the excess solution adhered to make the adhesion of the fiber surface Liquid as uniform as possible, immediately put it into the prepared calcium chloride aqueous solution, crosslink f...

Embodiment 3

[0029] Example 3. A kind of calcium ion cross-linked mesoporous silica gel grafted on the polytetrafluoroethylene fiber tow

[0030] Reference patent 200910228776.8 prepares polytetrafluoroethylene fiber tow grafted with polyacrylic acid, and neutralizes it with sodium hydroxide to obtain polytetrafluoroethylene fiber tow grafted with sodium polyacrylate;

[0031] Prepare a mixed aqueous solution of 1% sodium silicate and 1% sodium oxalate by mass percentage, and prepare an aqueous calcium chloride solution with a mass percentage concentration of 10%;

[0032] Soak the fibers of the above-mentioned grafted sodium polyacrylate into the prepared sodium silicate mixed aqueous solution for 0.5 hours, take it out and drip for 2 minutes, use absorbent paper to absorb the excess solution attached, so that the adhesion liquid on the surface of the fiber is as uniform as possible, Immediately put it into the prepared calcium chloride aqueous solution, cross-link for 2 hours, rinse 3 ti...

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PUM

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Abstract

The invention provides a method for grafting mesoporous silica gel on a fiber through calcium ion crosslinking. A preparation method comprises the following steps of: grafting polyacrylic acid on the fiber through ultraviolet radiation, taking out and washing a homopolymer on the surface of the fiber, and carrying out neutralization processing with sodium hydroxide to obtain the fiber grafted with polyacrylate sodium; preparing a sodium-silicate aqueous solution; soaking the fiber grafted with the polyacrylate sodium into the sodium-silicate aqueous solution, taking out the fiber, absorbing the adhered excessive solution through water-absorbing paper, and immediately placing the fiber into a calcium-chloride aqueous solution for crosslinking to obtain calcium silicate grafted on the fiber; and obtaining a mesoporous silica-gel layer with abundant Si-OH functional groups on the surface of the calcium silicate through the processing of hydrochloric acid solutions with different pH values so as to obtain the fiber grafted with the mesoporous silica gel. The method disclosed by the invention is simple in operation, does not use any organic solvent, and can be used in the fields of organic-substance adsorption and separation, controlled medicament release, organizational projects, catalysis and the like.

Description

technical field [0001] The invention relates to a method for preparing mesoporous silica gel grafted on fiber by calcium ion crosslinking, belonging to the field of functional materials. Background technique [0002] Fiber material has good flexibility and mechanical strength, large specific surface area, can be prepared into various shapes, and is easy to use. But the materials that can be spun into fibers are very limited, and the formed fibers often lack various functionalities. [0003] Silica gel is a highly active adsorption material with a chemical formula of mSiO 2 ·nH 2 O. Insoluble in water and any solvent, non-toxic and tasteless, stable in chemical properties, and does not react with any substance except strong alkali and hydrofluoric acid. Various types of silica gel form different pore structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/28D06M14/30D06M11/79D06M11/155D06M101/20D06M101/22D06M101/28D06M101/30
Inventor 赵孔银魏俊富李东英成方
Owner TIANJIN POLYTECHNIC UNIV