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Novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic and method for preparing same

A technology of starch-based plastics and cyclodextrin, which is applied in the field of novel β-cyclodextrin host-guest inclusion compound antibacterial starch-based plastics and its preparation, can solve the problem that the antibacterial performance of antibacterial plastic products cannot be fully exerted, the antibacterial effect is reduced, Short antibacterial period and other issues, to achieve the effect of simple coating design, long-lasting antibacterial effect, and simple preparation process

Inactive Publication Date: 2013-06-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the blending method of antibacterial agents and plastics, the antibacterial period is short, and the antibacterial effect decreases with the passage of time, and the antibacterial performance of the prepared antibacterial plastic products cannot be fully exerted.

Method used

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  • Novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic and method for preparing same

Examples

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Effect test

Embodiment 1

[0017] An antibacterial plastic, comprising the following components in mass percentage: plastic raw material starch filling PP95%, antibacterial masterbatch 4%, dispersant 0.2%, antioxidant 0.8%, the preparation method of the antibacterial starch plastic of the present embodiment comprises the following steps: Among them, the plastic raw material is starch-filled PP, the antibacterial masterbatch is β-cyclodextrin host-guest inclusion compound zinc oxide antibacterial masterbatch, the dispersant is sodium stearate, and the antioxidant is 1010. Wherein the dispersant used may be one of zeolite, silica, bentonite, sepiolite, diatomaceous earth or sodium stearate. One of MD-1024, JX-1076, 702, 164 or 1010 can be used as the antioxidant.

[0018] (1): Prepare thermoplastic starch according to the usual steps for preparing pp filled starch;

[0019] (2): Mix thermoplastic starch 20%, PP75%, dispersant 0.2%, antioxidant 0.8%, and β-cyclodextrin host-guest inclusion complex nano-zi...

Embodiment 2

[0021] The antibacterial masterbatch is β-cyclodextrin host-guest inclusion complex nano-titanium dioxide, and other formulations are the same as in Example 1.

Embodiment 3

[0023] The antibacterial masterbatch is β-cyclodextrin host-guest inclusion complex nano-silver, and other formulations are the same as in Example 1.

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Abstract

The invention discloses a novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic and a method for preparing the novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic. The novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic comprises the following components in percentage by weight: 95-99% of plastic raw material, 1-4% of antibacterial masterbatch, 0.2-0.5% of dispersant and 0.5-1% of antioxidant, wherein the antibacterial masterbatch is a beta-cyclodextrin host-guest complex which is prepared by modifying beta cyclodextrin by concentrated sulfuric acid to obtain a beta-cyclodextrin acidified by sulfuric acid, enabling the beta cyclodextrin acidified by sulfuric acid to react with water at high temperature and coating an antibacterial nanoparticle gel solution or organic antibacterial agent. The novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic is prepared by mixing the plastic raw material and the antibacterial masterbatch, extruding, injecting and molding. The prepared novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic is a biodegradable polymer, is environment-friendly and nontoxic, can be easily coated and designed due to the amphipathic characteristic of cyclodextrin, is simple in preparation process and has a long-lasting antibacterial effect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a novel β-cyclodextrin host-guest inclusion complex antibacterial starch-based plastic and a preparation method thereof. Background technique [0002] At present, plastic products play a very important role in people's daily life and industrial and agricultural production. With the widespread popularization and application of plastic products in the field of daily necessities, people have higher and higher requirements for plastic products. Due to the shortage of energy and the fact that plastics are difficult to degrade in the natural environment, it will cause environmental pollution pressure. Therefore, the replacement of petroleum-based plastics that reduce petroleum-based plastics with biomass-based plastics is an urgent problem that governments and scientific and technological workers from all walks of life need to solve. [0003] Starch-based plasti...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L23/12C08L5/16C08K3/22C08K3/08C08J3/22
Inventor 袁华李浩淼
Owner TONGJI UNIV
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