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Multilevel porous polylactic acid material and preparation method thereof

The technology of a polylactic acid material and a macroporous material is applied in the field of multi-level porous polylactic acid material and its preparation, which can solve the problems such as no reports related to the multi-level porous polylactic acid material, and achieves wide application, easy operation and good heat resistance. sexual effect

Active Publication Date: 2017-07-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are no reports on multi-level porous polylactic acid materials in the prior art.

Method used

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  • Multilevel porous polylactic acid material and preparation method thereof
  • Multilevel porous polylactic acid material and preparation method thereof
  • Multilevel porous polylactic acid material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Using melt blending method, add dry and weighed 14.4g PLLA, 3.6gPDLA and 12gPEO to the torque rheometer at the same time, melt and blend for 5 minutes under the processing conditions of 180°C and 60 rpm, room temperature Cool down to obtain a blend.

[0044] (2) The obtained blend was put into deionized water to dissolve PEO, the deionized water was replaced every 8 hours, dissolved at room temperature and stirred, and the dissolution time was 3 days.

[0045] (3) Put the extracted sample into a vacuum oven at 40°C for 24 hours to dry to obtain the mesoporous-macroporous polylactic acid material.

[0046] The results of the raw materials and their proportions and water contact angles of each embodiment and comparative example are shown in Table 1.

[0047] Table 1 Raw materials and their proportions, water contact angles and porous structures of Examples and Comparative Examples

[0048]

[0049] "-" in the table means not added

Embodiment 2

[0051] (1) Using the melt blending method, add the dried and weighed 12.6g PLLA, 5.4gPDLA and 12gPEO to the torque rheometer at the same time, melt and blend at 180°C, 60 rpm for 5 minutes, room temperature Cool down to obtain a blend.

[0052] (2) The obtained blend was put into deionized water to dissolve PEO, the deionized water was replaced every 8 hours, dissolved at room temperature and stirred, and the dissolution time was 3 days.

[0053] (3) Put the extracted sample into a vacuum oven at 40°C for 24 hours to dry to obtain the mesoporous-macroporous polylactic acid material.

Embodiment 3

[0055] (1) Using melt blending method, add dry and weighed 10.8g PLLA, 7.2gPDLA and 12gPEO to the torque rheometer at the same time, melt blending at 180°C, 60 rpm for 5 minutes, room temperature Cool down to obtain a blend.

[0056] (2) The obtained blend was put into deionized water to dissolve PEO, the deionized water was replaced every 8 hours, dissolved at room temperature and stirred, and the dissolution time was 3 days.

[0057] (3) Put the extracted sample into a 40° C. vacuum oven and dry for 24 hours to obtain the mesoporous-macroporous polylactic acid material.

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Abstract

The invention belongs to the field of multilevel porous materials and particularly relates to a multilevel porous polylactic acid material and a preparation method thereof. The invention provides a polylactic acid material which is a mesoporous-macroporous material. The invention provides the multilevel porous polylactic acid material which can be degraded. The porous material has a controllable shape and a controllable pore size. The porous material can be applied to selective oil and water separation because of excellent hydrophobicity (a water contact angle can be up to 135 degrees) and lipophilicity. The multilevel porous material still has very good size stability and very good solvent resistance under an environment of which the temperature is up to 210 DEG C, and is still integral in structure when being stood in an acetonitrile solution with 80 DEG C-temperature for 24 hours; and the adsorption quantity of chloroform in an aqueous solution by the multilevel porous material can be up to 1.87 + / - 0.20gg<-1>.

Description

technical field [0001] The invention belongs to the field of multi-level porous materials, and in particular relates to a multi-level porous polylactic acid material and a preparation method thereof. Background technique [0002] Hierarchical porous materials (including micropores-mesopores, micropores-macropores, mesopores-macropores) have become another hot topic in the research of porous materials in recent years due to their diverse properties. Usually micropores (<2nm) and mesoporous (2-50nm) endow materials with high specific surface area, while macropores (>50nm) can improve the internal accessibility of porous materials. The combination of pores of different sizes can endow materials with special balanced and complementary properties, which can be used in catalytic and photocatalytic H 2 , adsorption, separation, biomedicine, and energy storage and transmission have shown great application prospects. Many scholars have studied the preparation methods of hiera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J9/26
CPCC08J9/26C08J2201/0422C08J2367/04C08J2467/04C08L67/04C08L2201/06C08L2205/025
Inventor 杨伟孙小蓉包睿莹曹志强杨鸣波
Owner SICHUAN UNIV
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