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Antibacterial biaxially-oriented polylactic acid (BOPLA) film and preparation method thereof

A technology of biaxial stretching and polylactic acid, applied in the field of polylactic acid composition, can solve the problems of complicated preparation process and no use mentioned

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process usually requires the addition of a large amount of organic solvents, and the preparation process is also relatively complicated.
Also, the patent does not mention its use for BOPLA films

Method used

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  • Antibacterial biaxially-oriented polylactic acid (BOPLA) film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Weigh 100.0 g (0.465 mol) of polyhexamethylene guanidine propionate (Shanghai Gaoju F3000), add it to 300 mL deionized water solution, stir to dissolve it, and call it solution A; (2) also call it Add 70.0g (0.246mol) of sodium silicate (chemically pure, commercially available) into 300mL of deionized water, stir to dissolve it, and call it solution B; (3) at room temperature (about 25°C), mix solution A and Solution B was mixed and fully stirred for 30 minutes to form solution C; (4) Weigh zinc sulfate ZnSO 4 (Chemically pure, commercially available) 180.0g (0.626mol), slowly poured into solution C, and vigorously stirred for 5min, the precipitate was filtered, dried, and pulverized to obtain polyhexamethylene guanidine propionate / polysilicic acid Zinc composite antibacterial agent (composite antibacterial agent one).

Embodiment 2

[0058] (1) Weigh 100.0 g (0.465 mol) of polyhexamethylene guanidine propionate (Shanghai Gaoju F3000), add it to 300 mL deionized water solution, stir to dissolve it, and call it solution A; (2) also call it Add 100.0 g (0.352 mol) of sodium silicate (chemically pure, commercially available) into 500 mL of deionized water, stir to dissolve it, and call it solution B; (3) mix solution A and solution B, and fully Stir for 1h to form solution C; (4) weigh zinc sulfate ZnSO 4 (Chemically pure, commercially available) 120.0g (0.417mol), slowly poured into solution C, and vigorously stirred for 10min, the precipitate was filtered, dried, and pulverized to obtain polyhexamethylene guanidine propionate / polysilicic acid Zinc composite antibacterial agent (composite antibacterial agent two).

Embodiment 3

[0060] (1) Weigh 100.0g (0.635mol) of polyhexamethyleneguanidine hydrochloride (Shanghai Gaoju F1000), add it to 300mL deionized water solution, stir to dissolve it, and call it solution A; Sodium silicate (chemically pure, commercially available) 150.0g (0.528mol), was added to 600mL deionized water, stirred to dissolve, called solution B; (3) at room temperature (about 25 ° C), solution A and Solution B was mixed and fully stirred for 1.5h to form solution C; (4) Weigh calcium nitrate Ca(NO 3 ) 2 (Chemically pure, commercially available) 120.0g (0.508mol), slowly poured into solution C, and vigorously stirred for 10min, the precipitate was filtered, dried, and pulverized to obtain polyhexamethyleneguanidine hydrochloride / polysilicic acid Calcium compound antibacterial agent (composite antibacterial agent three).

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Abstract

The invention discloses an antibacterial biaxially-oriented polylactic acid (BOPLA) film and a preparation method thereof. The polylactic acid film comprises the following components in parts by weight: 100 parts of a material special for a biaxially-oriented polylactic acid film and 0.4-3 parts of an antibacterial agent, wherein the film is prepared with a biaxial orientation method, and is 10-100 mum in thickness; the antibacterial agent is a poly-guanidine / polysilicate compound antibacterial agent, and is prepared by mixing a water-soluble poly-guanidine inorganic acid salt or an aqueous solution of an organic acid salt and an aqueous solution of water-soluble silicate, and adding an aqueous solution of a water-soluble metal salt; the molar ratio of the water-soluble poly-guanidine inorganic acid salt or the organic acid salt to the water-soluble silicate is 10:1-1:50; and the molar ratio of the water-soluble silicate to the water-soluble metal salt is 5:1-1:3. The antibacterial BOPLA film has the characteristics of high antibacterial efficiency, small using amount, good antibacterial effect and high water stability, and has a wide application prospect.

Description

technical field [0001] The present invention relates to a polylactic acid composition, more specifically, the present invention relates to a biodegradable antibacterial polylactic acid film and its preparation method and application. Background technique [0002] Polylactic acid is a polymer obtained by producing lactic acid from starch obtained from corn, taro, etc. as a raw material, and further chemically synthesizing it. In recent years, with the continuous improvement of people's awareness of environmental protection, major scientific research institutions and companies in the world have increased their investment in the research and production of polylactic acid (PLA), and polylactic acid has been applied to people's daily necessities, packaging materials, fiber Textile, foam materials and other fields. [0003] Because polylactic acid has the advantages of biodegradability, excellent mechanical properties and transparency, and good oxygen barrier properties, the appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L79/00C08K3/34
Inventor 李杰张师军王小兰张浩李魁陈力张洪波
Owner CHINA PETROLEUM & CHEM CORP
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