Long-acting bio-antibacterial polylactic acid plastic and preparation method thereof

An antibacterial polylactic acid and polylactic acid technology, which is applied in the field of long-acting biological antibacterial polylactic acid plastics and its preparation, can solve the problems of insufficient antibacterial activity, etc., and achieve the effects of long antibacterial time, excellent antibacterial effect and low cost

Inactive Publication Date: 2019-05-03
上海九意日用品有限公司
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of long-acting biological antibacterial polylactic acid plastics and preparation method thereof, to solve the problem that chitosan proposed in the above-mentioned background technology is used as an additive in biodegradable polylactic acid plastics, antibacterial activity and artificially synthesized organic, Insufficient problems compared with inorganic antibacterial agents

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  • Long-acting bio-antibacterial polylactic acid plastic and preparation method thereof
  • Long-acting bio-antibacterial polylactic acid plastic and preparation method thereof
  • Long-acting bio-antibacterial polylactic acid plastic and preparation method thereof

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0029] see Figure 1-2 , an embodiment provided by the present invention: a long-acting biological antibacterial polylactic acid plastic and a preparation method thereof, comprising the following steps:

[0030] Step 1, prepare antibacterial fiber with chitosan;

[0031] Step 2, using glyoxal as a cross-linking agent to cross-link with chitosan antibacterial fiber, using glyoxal as a cross-linking agent to react with chitosan molecules to improve the molecular stability and antibacterial effect of chitosan fibers ;

[0032] Step 3, directly mixing chitosan antibacterial fiber powder with polylactic acid material and co-extruding antibacterial polylactic acid base m...

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Abstract

The invention discloses a long-acting bio-antibacterial polylactic acid plastic and a preparation method thereof and relates to the fields of preparation of antibacterial plastic. The invention is tosolve the problem that when chitosan, as an additive, is applied to biodegradable polylactic acid plastic in the prior art, the antibacterial activity is inferior to that of artificial organic / inorganic antibacterial agents. The method includes: 1) preparing antibacterial fibers from chitosan; 2) performing a crosslinking reaction with the chitosan antibacterial fibers with glyoxal being a crosslinker; 3) directly performing mixing coextrusion on the chitosan antibacterial fiber powder and a polylactic acid material to obtain an antibacterial polylactic acid base material; 4) performing high-temperature low-speed blending on the modified chitosan antibacterial fiber material and the antibacterial polylactic acid base material to prepare the long-acting bio-antibacterial polylactic acid plastic.

Description

technical field [0001] The invention relates to the field related to the preparation of antibacterial plastics, in particular to a long-acting biological antibacterial polylactic acid plastic and a preparation method thereof. Background technique [0002] At present, the packaging market for food and medicine is very large, but there are not many products with effective antibacterial materials. But most natural materials lack long-term antibacterial effect. Most synthetic inorganic antibacterial agents have poor biocompatibility and cannot be used in food and medicine fields. Although a small amount of artificially synthesized organic antibacterial agents can be used in the medical field, the manufacturing process is complicated and the price is too high to be widely used in relatively cheap food and medicine. Pharmaceutical packaging market. Chitosan is obtained by deacetylation of chitin, which exists widely in nature, and its chemical name is polyglucosamine (1-4)-2-ami...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L5/08
Inventor 黄成华
Owner 上海九意日用品有限公司
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