Preparation method of high-molecular-weight polylactic acid stereoscopic compound

A high-molecular-weight, polylactic acid technology, applied in the field of preparation of high-molecular-weight polylactic acid stereocomplexes, to achieve the effects of easy preparation, wide operating temperature range, good thermal stability and chemical stability

Inactive Publication Date: 2013-08-21
EAST CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, how to efficiently prepare high-molecular-weight PLA stereocomplexes remains a challenge

Method used

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  • Preparation method of high-molecular-weight polylactic acid stereoscopic compound
  • Preparation method of high-molecular-weight polylactic acid stereoscopic compound
  • Preparation method of high-molecular-weight polylactic acid stereoscopic compound

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Embodiment 1-7

[0031] The L-polylactic acid used in the examples of the present invention is produced by Natureworks, USA, and its weight average molecular weight is 210 kg / mol.

[0032] The D-polylactic acid used in the examples of the present invention is produced by Changchun Shengboma Biomaterials Co., Ltd., and its weight average molecular weight is 411kg / mol.

[0033] The ionic liquid used in the embodiment of the present invention is produced by the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, including 1-ethyl-3-methylimidazole trifluorosulfonyl imide salt, and the simplified chemical formula is EMIMNTF 2 , 1-hexyl-3-methylimidazole trifluorosulfonimide salt, the chemical formula is HMIMNTF 2 . The purity of the ionic liquid is greater than 99%.

[0034] L-polylactic acid, d-polylactic acid, and ionic liquid were weighed according to the mass ratio in Table 1, and added to glass bottles.

[0035] Place the glass bottle containing the raw materials in an oil ...

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Abstract

The invention discloses a preparation method of a high-molecular-weight polylactic acid stereoscopic compound. The high-molecular-weight polylactic acid stereoscopic compound comprises the following raw materials in parts by weight: 2-30 parts of levorotatory polylactic acid, 2-30 parts of dextrorotary polylactic acid and 50-95 parts of ionic liquid. The stereoscopic compound is characterized by being obtained in a way that the levorotatory polylactic acid and the dextrorotary polylactic acid are formed into gel in the ionic liquid. The method disclosed by the invention is simple, practical and easy to operate, and thus can realize industrial large-scale continuous production. Meanwhile, according to the difference of the required materials in performance, inorganic filler can be additionally added. Compared with conventional solvent, the ionic liquid has non-volatility, high ionic conductivity and heat stability. Thus, the polylactic acid ionic gel can also be used as a solid electrolyte, and is hopefully used in the aspects of battery diaphragms, artificial intelligent drivers and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and relates to a preparation method of a high-molecular-weight polylactic acid stereocomplex. Background technique [0002] Polylactic acid is a green polymer material prepared from renewable resources. It is recognized as the most promising renewable-based biomaterial among many biodegradable materials. It is widely used in medical sutures, drug buffers, etc. Scaffold materials and repair materials in tissue engineering. According to the different optical rotation of the monomer, polylactic acid is divided into left-handed polylactic acid (PLLA) and right-handed polylactic acid (PDLA). L-polylactic acid and D-polylactic acid can co-crystallize under certain conditions to form a stereocomplex, and its melting point is about 50°C higher than that of homogeneous crystals (crystals obtained by crystallization of L-lactic acid or D-polylactic acid). This greatly improves The he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J3/11C08L67/04C08K7/00C08K3/04C08K3/22C08K3/32
Inventor 吕瑞华那兵朱杰
Owner EAST CHINA UNIV OF TECH
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