Silicon-calcium slag degradation assisted degradation polylactic acid preparation method

A technology of silicon-calcium slag and polylactic acid, which is applied in the field of inorganic nanomaterials and polymer composite materials, can solve the problems of long degradation cycle, poor impact resistance, weak interface bonding force, etc., shorten the degradation cycle, improve mechanical properties, The effect of improving compatibility

Inactive Publication Date: 2020-06-12
宁波普莱斯帝金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid also has disadvantages such as poor hydrophilicity, high brittleness, poor impact resistance, long degradation cycle, etc., and polylactic acid is expensive, so its application is restricted.
[0004] In order to improve the mechanical properties of polylactic acid, researchers tried to blend inorganic materials with polylactic acid. However, due to the weak interfacial bonding force between the two, the compatibility after compounding is extremely poor, and the inorganic materials are easy to agglomerate into particles. Existing in polylactic acid, the mechanical properties of composite materials cannot be improved, or even decreased

Method used

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  • Silicon-calcium slag degradation assisted degradation polylactic acid preparation method

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Experimental program
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Effect test

Embodiment 1

[0020] 1) Pretreatment of silicon-calcium slag: Grinding and pulverizing silicon-calcium slag with a grinder, and sieving to obtain silicon-calcium slag fine powder with a particle size of about 4-10 μm;

[0021] 2) Modification of silicon-calcium slag: Add silicon-calcium slag fine powder into oleic acid ethanol solution, the mass volume ratio of silicon-calcium slag fine powder and oleic acid is 1:0.3g / mL, ultrasonically disperse for 30min, and react at 40°C 2-3h, filter and dry;

[0022] 3) Preparation of composite material: premix the modified silicon-calcium slag obtained in step 2) with polylactic acid, the mass ratio of the modified silicon-calcium slag to polylactic acid is 0.4:1, add the two-roll mill to melt blend, melt The blending temperature is 180° C., and the time is 15 minutes to obtain a blended product;

[0023] 4) Hot pressing the blended product obtained in step 3) to obtain a calcium-silicon slag polylactic acid composite material.

[0024] Its absorptio...

Embodiment 2

[0027] 1) Pretreatment of silicon-calcium slag: Grinding and pulverizing silicon-calcium slag with a grinder, and sieving to obtain silicon-calcium slag fine powder with a particle size of about 4-10 μm;

[0028] 2) Modification of silicon-calcium slag: Add silicon-calcium slag fine powder into oleic acid ethanol solution, the mass volume ratio of silicon-calcium slag fine powder and oleic acid is 1:0.5g / mL, ultrasonically disperse for 30min, and react at 60°C 2-3h, filter and dry;

[0029] 3) Preparation of composite material: premix the modified silicon-calcium slag obtained in step 2) with polylactic acid, the mass ratio of the modified silicon-calcium slag to polylactic acid is 0.6:1, add the two-roll mill to melt blend, melt The blending temperature is 180° C., and the time is 15 minutes to obtain a blended product;

[0030] 4) Hot pressing the blended product obtained in step 3) to obtain a calcium-silicon slag polylactic acid composite material.

[0031] After adding ...

Embodiment 3

[0034] 1) Pretreatment of silicon-calcium slag: Grinding and pulverizing silicon-calcium slag with a grinder, and sieving to obtain silicon-calcium slag fine powder with a particle size of about 4-10 μm;

[0035] 2) Preparation of composite material: Premix the silicon-calcium slag fine powder obtained in step 1) with polylactic acid, the mass ratio of silicon-calcium slag to polylactic acid is 0.4:1, add the two-roll mill to melt blend, and melt blend The temperature is 180° C., and the time is 15 minutes to obtain a blended product;

[0036] 3) Hot pressing the blended product obtained in step 2) to obtain a calcium-silicon slag polylactic acid composite material.

[0037] Since the silicon-calcium slag has not been modified with oleic acid, its dispersion in polylactic acid is extremely poor, and the particles are agglomerated in polylactic acid, resulting in a decrease in the mechanical properties of polylactic acid.

[0038] After testing, the tensile strength of the com...

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Abstract

The invention provides a calcium silicate slag assisted degradation polylactic acid preparation method. The method comprises the following steps: 1) preprocessing calcium silicate slag: grinding and crushing calcium silicate slag through a grinding machine, and screening to obtain calcium silicate slag fine powder with a particle size of about 4-10 [mu]m; 2) modifying silicon-calcium slag: addingthe silicon-calcium slag fine powder into an ethanol solution of oleic acid, ultrasonically dispersing, heating to react, filtering and drying; 3) preparing a composite material: premixing the modified silicon-calcium slag obtained in step 2) with polylactic acid, adding the obtained mixture into a double-roller open mill, and performing melt blending to obtain a blended product; and 4) performinghot press molding to obtain the silicon-calcium slag and polylactic acid composite material. The method realizes utilization of waste slag, greatly improves the photodegradation speed of polylactic acid, and shortens the degradation period of polylactic acid.

Description

technical field [0001] The invention relates to a composite material of inorganic nanometer material and polymer, in particular to a preparation method of silicon-calcium slag modified polylactic acid material. Background technique [0002] Calcium silicon slag is a kind of loose and porous industrial waste, its main component is calcium silicon, and its chemical composition includes CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 , MgO, etc. Aluminum extraction with fly ash, aluminum extraction with acid method and ammonium fluoride fluxing method, and aluminum extraction with potassium feldspar alkali method will produce calcium-silicon slag. Taking aluminum extraction with fly ash as an example, the amount of fly ash and calcium-silicon The ratio of slag discharge is as high as 1:10, and a large amount of silicon-calcium slag is mostly disposed of by landfill, which has caused great harm to the environment. Therefore, the method of processing silicon-calcium slag has become an urge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/04C08K7/26
CPCC08K7/26C08K9/04C08K2201/003C08L2201/06C08L67/04
Inventor 唐洁净
Owner 宁波普莱斯帝金属制品有限公司
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