CN1488262A - Vegetable and fruit coating antistaling agent and preparing process thereof - Google Patents

Abstract

The invention provides a film-smearing preservation agent of vegetable and fruit and the preparing technique. It is composed of glycerol monostearate, sucrose ester, plant polysaccharide glue and water. The preparing technique: taking plant polysaccharide glue added with edible alcohol and water, soaking, blending and heating to make the plant polysaccharide glue fully dissolve; taking glycerol monostearate, sucrose ester and water to heat and mix in another container, then adding with the solution of the plant polysaccharide glue, fully blending and heating to 90-100 DEG C, and then using homogenizer to homogenize the mixed solution to cool and filter to make it. It forms film on the surface of vegetable and fruit.

Description

A kind of vegetable and fruit coating antistaling agent and preparation technology thereof

Technical field

The present invention relates to a kind of vegetable and fruit antistaling agent, particularly relate to a kind of vegetable and fruit coating antistaling agent and preparation technology thereof.

Background technology

Vegetable and fruit is people's daily necessities, demand increases day by day, but because the shelf life of seasonality, region and market sale that vegetable and fruit is produced, the freshness that need keep vegetable and fruit within a certain period of time, the respiration of postharvest fruit and vegetable and moisture transpiration effect are the aging corrupt key factors of fruits and vegetables, therefore by suppressing the respiration and the transpiration of postharvest fruit and vegetable, just reach fresh-keeping purpose to a certain extent.

The post-harvest fresh-keeping method of fruits and vegetables is more, has freezer refrigeration, air-conditioned cold store storage, vacuum pre-cooling, freshness protection package to pack, film etc.Coating-film fresh-keeping forms thin film by smear film at fruit and vegetable surfaces exactly, stops contacting of fruits and vegetables and air and scattering and disappearing of moisture, suppresses breathing and rising, thereby reaches fresh-keeping purpose.

Summary of the invention

The purpose of this invention is to provide and a kind ofly can form film, reduce the fruits and vegetables moisture transpiration, suppress the breathing of postharvest fruit and vegetable, reduce fruit vegetable nutrient consumption and variation, reach fresh-keeping purpose, safety, free of contamination vegetable and fruit coating antistaling agent at fruit and vegetable surfaces.

Another object of the present invention provides the preparation technology of above-mentioned vegetable and fruit coating antistaling agent.

Technical scheme of the present invention is: with monoglyceride, sucrose ester, plant polyose glue is primary raw material, adds water, makes coating antistaling agent through adding thermal agitation.

Purpose of the present invention can realize by following measures:

A kind of vegetable and fruit coating antistaling agent, make by following components in weight percentage:

Monoglyceride 0.10～0.80%, sucrose ester 0.08～0.50%, plant polyose glue 0.05～0.50%, water surplus.

A kind of preparation method of vegetable and fruit coating antistaling agent comprises the following step:

A. get plant polyose glue by prescription, add a little edible alcohol, make natural plant gum soak into, disperse, add an amount of cold water again, fully stir, placed 3～5 hours, be heated to 75～85 ℃, natural plant gum is fully dissolved;

B. get monoglyceride by prescription and sucrose ester is put into another container, add an amount of water, be heated with stirring to 75～85 ℃;

C. when step b finishes, material is dropped in the solution of step a, make it to become decentralized photo, fully stir, and be heated to 90～100 ℃, stop heating, with homogenizer homogeneous mixed liquor;

D. the mixed liquor that homogeneous is crossed is placed cooling naturally, when temperature reaches 50～60 ℃, mixed liquor is filtered.

Purpose of the present invention can also realize by following measures:

Monoglyceride can be the distillation monoglyceride in the component of described antistaling agent, and the HLB value of sucrose ester is 6～10, and plant polyose glue is meant Glucomannan glue or 1: 1 the Glucomannan glue and the mixture of galactomannan gum, and water is clean water.

Described preparation method, the concentration of used edible alcohol is 70～95% among its step a.

Advantage of the present invention:

Preparation method's simple possible provided by the invention, the vegetable and fruit coating antistaling agent that provides can form film at fruit and vegetable surfaces, reduce the fruits and vegetables moisture transpiration, suppress the breathing of postharvest fruit and vegetable, reduce fruit vegetable nutrient consumption and variation, reach fresh-keeping purpose, and raw materials used all be edibility, cleaning easily, is a kind of safe, free of contamination fruit and vegetable fresh-keeping agent.

The specific embodiment

The present invention is further illustrated by the following examples.

Embodiment 1:

Get Glucomannan glue 10g, put into beaker 1, add a little 95% edible alcohol and make Glucomannan glue soak into, disperse, water intaking 5000g, slowly pour in the beaker, the limit edged stirs, and prevents the glued piece of Glucomannan, places 3 hours, make the natural plant gum imbibition, be heated to 85 ℃, fully stir simultaneously; Get monoglyceride 30g, sucrose ester 20g mixing and put into beaker 2, add water 5000g, be heated with stirring to 85 ℃; With mixing with liquid in the beaker 1 in the liquid adding beaker 1 in the beaker 2, fully stir, be heated to 100 ℃, stop heating, with homogenizer (east, Shanghai magnificent high pressure homogenizer factory, GYB-SY type) homogeneous, get milky white emulsion, when temperature is reduced to 60 ℃,, be placed to normal temperature with two layers of filtered through gauze.Get vegetables reed wormwood artemisia and remove leaf and inedible part, clean, drain, in coating antistaling agent dipping once, airing.With the reed wormwood artemisia of not filming in contrast, will handle and contrast naked putting on enamel tray simultaneously, and measure percentage of water loss and respiratory intensity, the result is as follows:

Table 1 is filmed back reed wormwood artemisia percentage of water loss (%) relatively

Film

?8.4

?15.9

?24.5

?31.6

?38.7

Reed wormwood artemisia respiratory intensity compared (14 ℃) after table 2 was filmed

Handle	Respiratory intensity (ml/kg.hr)
		Contrast	26.3243
Film	14.9275

Embodiment 2:

Get 5g Glucomannan glue and 5g galactomannan gum, put into beaker 1, add a little 70% edible alcohol and make its infiltration, dispersion, water intaking 5000g, slowly pour in the beaker, the limit edged stirs, and prevents glued piece, places 5 hours, make the natural plant gum imbibition, be heated to 75 ℃, fully stir simultaneously; Get monoglyceride 30g, sucrose ester 20g mixing and put into beaker 2, add water 5000g, be heated with stirring to 75 ℃; With mixing with liquid in the beaker 1 in the liquid adding beaker 1 in the beaker 2, fully stir, be heated to 90 ℃, stop heating, with homogenizer (east, Shanghai magnificent high pressure homogenizer factory, GYB-SY type) homogeneous, get milky white emulsion, when temperature is reduced to 50 ℃,, be placed to normal temperature with two layers of filtered through gauze.Commercially available fresh Nanfeng orange is put into the antistaling agent dipping film, naked putting under the normal temperature condition observed appearance change and measured percentage of water loss, the results are shown in Table 3.

Table 3 Nanfeng orange coating-film fresh-keeping effect and percentage of water loss

Claims (4)

1, a kind of vegetable and fruit coating antistaling agent is characterized in that being made by following components in weight percentage:

Monoglyceride 0.10～0.80%, sucrose ester 0.08～0.50%, plant polyose glue 0.05～0.50%, water surplus.

2, antistaling agent according to claim 1, it is characterized in that monoglyceride can be the distillation monoglyceride, the HLB value of sucrose ester is 6～10, and plant polyose glue is meant Glucomannan glue or 1: 1 the Glucomannan glue and the mixture of galactomannan gum, and water is clean water.

3, a kind of preparation method of vegetable and fruit coating antistaling agent is characterized in that comprising the following step:

A. get plant polyose glue by prescription, add a little edible alcohol, make natural plant gum soak into, disperse, add an amount of cold water again, fully stir, placed 3～5 hours, be heated to 75～85 ℃, natural plant gum is fully dissolved;

B. get monoglyceride by prescription and sucrose ester is put into another container, add an amount of water, be heated with stirring to 75～85 ℃;

C. when step b finishes, material is dropped in the solution of step a, make it to become decentralized photo, fully stir, and be heated to 90～100 ℃, stop heating, with homogenizer homogeneous mixed liquor;

D. the mixed liquor that homogeneous is crossed is placed cooling naturally, when temperature reaches 50～60 ℃, mixed liquor is filtered.

4, preparation method according to claim 3, the concentration that it is characterized in that edible alcohol used among the step a is 70～95%.