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Preparation method of water-resistant solid buoyancy material

A technology of solid buoyancy and preparation steps, applied in the field of foam materials, can solve the problems of insufficient density, high water absorption, loss of buoyancy, etc., and achieve good water blocking performance

Inactive Publication Date: 2017-07-28
CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: aiming at the defect that the solid buoyancy material prepared by the chemical foaming method has a high water absorption rate and insufficient density, and if the water blocking layer is damaged, the material will lose the function of providing buoyancy. A kind of preparation method of water-resistant solid buoyancy material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] According to the mass ratio of 1:5, kapok fibers were mixed with absolute ethanol and ultrasonically washed at 200W for 10 minutes, filtered to obtain a filter cake, dried at 45°C for 6 hours to obtain dry kapok fibers, and then according to the mass ratio of 1:25, the Dried kapok fibers were mixed with acetic anhydride and heated in an oil bath at 100°C for 3 hours; after the heating in the water bath was completed, centrifuged at 1500r / min to collect the lower precipitate, washed with absolute ethanol and acetone for 3 times, and placed in Dry at 45°C for 6 hours to prepare modified kapok fiber; according to the mass ratio of 1:8, mix Lycopodium spore powder and kapok fiber and put them in a ball mill tank, after ball milling at 150r / min for 3 hours, pass through a 150-mesh sieve to obtain the mixed Powder, then weighed 45 parts of glycerol, 10 parts of polyethylene glycol, 5 parts of mixed powder and 0.5 parts of 1mol / L sulfuric acid solution in a three-necked flask, ...

example 2

[0018] According to the mass ratio of 1:5, kapok fibers were mixed with absolute ethanol and placed under 300W for ultrasonic washing for 15 minutes, filtered to obtain a filter cake, dried at 50°C for 8 hours to obtain dry kapok fibers, and then according to the mass ratio of 1:25, the Dried kapok fibers were mixed with acetic anhydride and heated in an oil bath at 120°C for 5 hours; after the heating in the water bath was completed, centrifuged at 2000r / min to collect the lower precipitate, washed with absolute ethanol and acetone for 5 times, and placed in Dry at 50°C for 8 hours to prepare modified kapok fiber; according to the mass ratio of 1:8, mix Lycopodium spore powder and kapok fiber and put them in a ball mill tank, after ball milling at 200r / min for 5 hours, pass through a 150-mesh sieve to obtain the mixed Powder, then weigh 50 parts of glycerol, 15 parts of polyethylene glycol, 10 parts of mixed powder and 1.0 part of 1mol / L sulfuric acid solution in a three-necke...

example 3

[0020]According to the mass ratio of 1:5, kapok fibers were mixed with absolute ethanol and ultrasonically washed at 250W for 12 minutes, filtered to obtain a filter cake, dried at 48°C for 7 hours to obtain dry kapok fibers, and then according to the mass ratio of 1:25, the Dried kapok fibers were mixed with acetic anhydride and heated in an oil bath at 110°C for 4 hours; after the heating in the water bath was completed, centrifuged at 1750r / min to collect the lower layer of precipitate, washed with absolute ethanol and acetone for 4 times, and then placed in Dry at 48°C for 7 hours to prepare modified kapok fiber; according to the mass ratio of 1:8, mix Lycopodium spore powder and kapok fiber and put them in a ball mill tank. After ball milling at 175r / min for 4 hours, pass through a 150-mesh sieve to obtain the mixed fiber. Powder, then weighed 48 parts of glycerol, 13 parts of polyethylene glycol, 8 parts of mixed powder and 0.8 parts of 1mol / L sulfuric acid solution in a ...

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Abstract

The invention belongs to the technical field of foam materials and particularly relates to a preparation method of a water-resistant solid buoyancy material. The method comprises the steps of firstly mixing a kapok fiber with absolute ethyl alcohol, washing, filtering and then collecting a filter cake; drying and then obtaining a dried kapok fiber; mixing the dried kapok fiber with acetic anhydride, heating, centrifuging and then collecting sediments, washing and drying to obtain the modified kapok fiber; carrying out mixed ball-milling on the modified kapok fiber and lycopodium spore powder, then adding glycerol, polyethylene glycol and a sulfuric acid solution, carrying out oil-bath heating, adjusting the pH by using sodium hydroxide and standing to obtain modified mixed polyol; and finally stirring and mixing the modified mixed polyol, polyether and dibutyltin dilaurate, putting the mixture into a mold for natural foaming, curing and demolding to obtain the water-resistant solid buoyancy material. The obtained water-resistant solid buoyancy material is low in density, low in water absorption rate, high in compression strength and good in shock resistance.

Description

technical field [0001] The invention belongs to the technical field of foam materials, and in particular relates to a preparation method of a water-resistant solid buoyancy material. Background technique [0002] With the continuous advancement of marine science and marine technology, projects such as marine scientific research, marine resource investigation, and marine instrumentation and equipment research have put forward higher requirements for the performance of solid buoyant materials, and there is an urgent need for low-density, low water absorption, and high compressive strength. The solid buoyancy material ensures sufficient buoyancy for the equipment with the minimum size of the solid buoyancy material, increasing the payload of the equipment. Low-density solid buoyancy material for water depth of 500m, with a density of 0.35g / cm 3 , the compressive strength is 5.5MPa; the solid buoyancy material currently developed has a density of 0.35g / cm 3 , The compressive s...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K5/521C08J9/14C08L1/12C08G101/00
CPCC08G18/6677C08G18/3206C08G18/4804C08G18/4833C08G2101/00C08J9/144C08J2203/142C08J2375/08C08K5/521C08L1/12
Inventor 刘叶王艳芹
Owner CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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