Flame-retardant smoke-suppression type bamboo fiber/polylactic acid composite material and preparation method thereof

A technology of composite materials and polylactic acid, which is applied in the field of material processing, can solve the problems of poor durability and degradability, and achieve the effects of improving wettability, enhancing mechanical properties, and reducing smoke and heat release

Inactive Publication Date: 2017-12-22
刘凡领
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at the problems that both the base material polylactic acid and the reinforcing material plant fiber are extremely flammable and the composite materials reinforced by different plant fibers have poor durability and degradability, a Flame-retardant and smoke-suppressing bamboo fiber / polylactic acid composite material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Take 150g of ammonium polyphosphate with a low degree of polymerization, add it to 600g of absolute ethanol, stir at 300r / min for 20min, then add 1.5g of silane coupling agent KH-550, continue stirring for 50min in a constant temperature water bath at 60°C, and then Distill under reduced pressure to dryness to obtain modified ammonium polyphosphate, get 200g mass fraction as 1% urea solution, evenly spray on the surface of 100g bamboo powder that has passed through a 100 mesh sieve, mix and air-dry until the water content of bamboo powder is 40%, And put it into a fermenter, place it in a sealed place at 25°C for 5 days, then spray 0.2gEM bacterial liquid, and ferment it aerobically for 3 days. After the fermentation is completed, place it in a drying box and dry it at 80°C for 6h to obtain modified bamboo powder. , Take 80g of magnesium nitrate and 40g of aluminum nitrate, add them to 400mL of deionized water, stir at 300r / min for 20min in a constant temperature water b...

example 2

[0030] Take 180g of ammonium polyphosphate with a low degree of polymerization, add it to 700g of absolute ethanol, stir at 350r / min for 25min, then add 1.8g of silane coupling agent KH-550, continue stirring for 55min in a constant temperature water bath at 63°C, and then Distill under reduced pressure to dryness to obtain modified ammonium polyphosphate, get 300g mass fraction to be 1% urea solution, evenly spray on the surface of 150g bamboo powder that crosses 150 mesh sieve, air-dry after mixing evenly until the water content of bamboo powder is 45%, And put it into a fermenter, place it in a sealed place at 28°C for 6 days, then spray 0.3gEM bacterial liquid, ferment aerobically for 4 days, put it in a drying box after fermentation, and dry it at 85°C for 7h to obtain modified bamboo powder , take 90g of magnesium nitrate, 45g of aluminum nitrate, add 450mL of deionized water, in a constant temperature water bath at 28°C, stir at 350r / min for 25min, then add 108g of modif...

example 3

[0032] Take 200g of ammonium polyphosphate with a low degree of polymerization, add it to 800g of absolute ethanol, stir at 400r / min for 30min, then add 2.0g of silane coupling agent KH-550, continue stirring for 60min in a constant temperature water bath at 65°C, and then Distill under reduced pressure to dryness to obtain modified ammonium polyphosphate, get 400g mass fraction as 1% urea solution, evenly spray on the surface of 200g bamboo powder that has passed through a 200 mesh sieve, mix and air-dry until the water content of bamboo powder is 50%, And put it into a fermenter, place it in a sealed place at 30°C for 7 days, then spray 0.4gEM bacterial liquid, and ferment it aerobically for 5 days. After the fermentation is completed, place it in a drying box and dry it at 90°C for 8h to obtain modified bamboo powder. , take 100g of magnesium nitrate, 50g of aluminum nitrate, add 500mL of deionized water, in a constant temperature water bath at 30°C, stir at 400r / min for 30m...

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PUM

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Abstract

The invention relates to a preparation method of a flame-retardant smoke-suppression type bamboo fiber/polylactic acid composite material, belonging to the technical field of material processing. The preparation method comprises the steps of adding low polymerization degree ammonium polyphosphate into absolute ethyl alcohol, stirring, adding a silane coupling agent, carrying out constant-temperature water bath, continuing to stir, and carrying out reduced pressure distillation until reaching a dry state so as to obtain modified ammonium polyphosphate; spraying a urea solution to the surface of sieved bamboo powder, uniformly mixing, airing, putting the mixture into a fermentation tank, carrying out sealed standing, spraying bacterial liquid for aerobic fermentation, and drying after the fermentation so as to obtain modified bamboo powder; adding magnesium nitrate and aluminum nitrate into deionized water, carrying out constant-temperature water bath, stirring, then adding modified bamboo powder, stirring, adjusting the pH value by virtue of a sodium hydroxide solution, standing, filtering to obtain filter residue, washing the filter residue, and drying to constant weight, so as to obtain flame-retardant modified bamboo powder; and uniformly mixing polylactic acid, modified ammonium polyphosphate, the flame-retardant modified bamboo powder and the like, blending, transferring the mixture into a hot-press formation machine, carrying out hot-pressing, and cooling to the room temperature, so as to obtain the flame-retardant smoke-suppression type bamboo fiber/polylactic acid composite material.

Description

technical field [0001] The invention relates to a flame-retardant and smoke-suppressing bamboo fiber / polylactic acid composite material and a preparation method thereof, belonging to the technical field of material processing. Background technique [0002] With the continuous advancement of the world's industrialization process, energy crisis and environmental pollution have increasingly become two major problems facing mankind. In order to maintain social progress, economic development and greening the earth, actively developing new energy and making full use of existing biomass renewable resources have become important means for countries to achieve sustainable development. Therefore, there are more and more developments and researches on renewable, recyclable and degradable biomass composite materials. During this process, bamboo has gradually attracted people's attention due to its unique advantages such as wide distribution of resources, fast growth rate, and strong na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/02C08K13/06C08K9/06C08K3/32C08K3/22
CPCC08L67/04C08K2003/2224C08K2003/2227C08K2003/323C08L2201/02C08L1/02C08K13/06C08K9/06C08K3/32C08K3/22
Inventor 郜九宏王之霖陈倩
Owner 刘凡领
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