CN102766268A - Preparation method of antibacterial food packing material - Google Patents

Abstract

The invention provides a method for preparing an antibacterial food packing material. According to the method, chitosan is introduced into a polymer packing material by a blending method; a composite material is prepared by the combination of advantages of two materials of polylactic acid and chitosan; and an antibacterial degradable packing material is manufactured while defects of the material itself are solved. The antibacterial food packing material prepared by the method can be widely used in industries of medical industry, food industry and the like.

Description

A kind of preparation method of antibiotic bag food package material

Technical field

The present invention relates to a kind of packaging material for food, relate in particular to a kind of antibacterial food wrapping material.

Background technology

The human modern life be unable to do without wrap food, and the wrap food that safety and health are provided is people to the basic demand of food manufacturer.But China's food bacterial poisoning problem is serious, and only just there are 766 bacterial food poisoning cases [3] in the 1994-2003 whole nation.All the time, Traditional Packing method and wrapping material are mostly adopted in food product pack, like Freshkeeping Packaging, modified atmosphere packaging and multilayer materials packing.

Along with people's is to food quality and improving constantly of safety and sanitation demand and advocating of Green Packaging theory, and original material can't satisfy the requirement of people to food safety.Therefore, at food packing industry, can effectively prevent bacterial cross-infection and have the anti-biotic material demand of health self-cleaning function very big.

At present, anti-biotic material is generally realized through antiseptic-germicide.Most commercial antiseptic-germicide is to toxic elements in human body and difficult under field conditions (factors) degraded.Therefore it is imperative to develop a kind of environmental friendliness antiseptic-germicide to human non-toxic.

Summary of the invention

For this reason, technical problem to be solved by this invention provides a kind of antibiotic and eco-friendly packaging material for food.

Chitosan has good antibacterial activity, combines through the advantage with POLYACTIC ACID and two kinds of materials of chitosan, processes matrix material, when solving the material self-defect, makes a kind of wrapping material of antibacterial degradable.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

A. POLYACTIC ACID and chitosan are dissolved among the DMSO, its mass ratio is respectively 99.5:0.5; 99:1; 98:2;

B. tentatively mixing the back hold over night at 50 ℃ of lasting down 30min that stir;

C. the back solution becomes of spending the night gets opaque but not stratified, places the UW mixed instrument to carry out ultrasonic mixing first miscible fluid at this moment.

D. will make blend 150 ℃ of evaporating solvents in baking oven.

In the preferred embodiment of the invention, POLYACTIC ACID: using carboxyl chitosan 98:2.

Adopt technique scheme, blend has the chitosan with anti-microbial effect in the wrapping material of the inventive method preparation, and is favourable to environment simultaneously, is applicable in foodstuffs industry to be widely used.

Description of drawings

Fig. 1 is the making method route map of POLYACTIC ACID chitosan blend thing.

Embodiment

In conjunction with the making method route map of the POLYACTIC ACID chitosan blend thing of Fig. 1, the present invention adopts following steps:

1. a certain amount of POLYACTIC ACID and chitosan are dissolved in that (mass ratio is respectively 99.5:0.5 among the DMSO; 99:1; 98:2; And POLYACTIC ACID: using carboxyl chitosan 98:2 is hereinafter to be referred as 0.5%, 1%, 2%, 2%-COOH.Undressed raw material is designated as PLLA.）

2. continue to stir 30min down at 50 ℃ and tentatively mix the back hold over night.

3. the back solution becomes of spending the night gets opaque but not stratified, places the UW mixed instrument to carry out ultrasonic mixing first miscible fluid at this moment.

4. will make blend 150 ℃ of evaporating solvents in baking oven and form the PLA-CS blend film.Blend is pale brown toner powder solid.

Can find out through detailed introduction of the present invention; Packaging material for food through the present invention's preparation; The introducing of chitosan can finely overcome the above problems, simultaneously the phagocytic power through strengthening scavenger cell with suppress the undesirable cell degraded product of avoiding POLYACTIC ACID of growing and cause aseptic inflammation in vivo.The antibacterial food packing material of this method preparation can be widely used in industries such as medical treatment and food.

But; Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not to be used as qualification of the present invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.

Claims (2)

1. method for preparing the antibacterial food wrapping material, it comprises the steps:

A. POLYACTIC ACID and chitosan are dissolved among the DMSO, its mass ratio was respectively 99.5: 0.5; 99: 1; 98: 2;

B. tentatively mixing the back hold over night at 50 ℃ of lasting down 30min that stir;

C. the back solution becomes of spending the night gets opaque but not stratified, places the UW mixed instrument to carry out ultrasonic mixing first miscible fluid at this moment.

D. will make blend 150 ℃ of evaporating solvents in baking oven.

2. method according to claim 1 is characterized in that: the POLYACTIC ACID among the said step a.: using carboxyl chitosan 98: 2.