CN104987543A - Preparation method and application of ternary blend polysaccharide containing konjak glucomannan, chitosan and sodium carboxymethylcellulose - Google Patents
Preparation method and application of ternary blend polysaccharide containing konjak glucomannan, chitosan and sodium carboxymethylcellulose Download PDFInfo
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- CN104987543A CN104987543A CN201510464820.0A CN201510464820A CN104987543A CN 104987543 A CN104987543 A CN 104987543A CN 201510464820 A CN201510464820 A CN 201510464820A CN 104987543 A CN104987543 A CN 104987543A
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Abstract
The invention discloses a preparation method for ternary blend polysaccharide containing konjak glucomannan, chitosan and sodium carboxymethylcellulose, and application thereof in cigarette production. The physico-chemical properties of the ternary blend polysaccharide prepared by adopting the preparation method are stable, and are not likely to change due to high temperature and high humidity during a tobacco manufacturing process, so that processing endurance performance of tobacco is obviously improved. The ternary blend polysaccharide can obviously improve the water holding property of tobacco in low or high humidity environments.
Description
Technical field
The invention belongs to tobacco humectation field of material technology, specifically, relate to the preparation method of a kind of Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.Meanwhile, the invention still further relates to this application of tertiary blending polysaccharide in cigarette primary processing.
Background technology
Cigarette shreds has easy dehydration property and easy water absorbability.In production of cigarettes process, in cigarette shreds, the fluctuation of moisture content not only can affect the stability of technology for making tobacco threds, also can cause the change of smoke chemistry composition, finally affects sensory comfort and the quality of cigarette product.Introduce efficient humectation material and be applied in cigarette product, the physics humid keeping performance of cigarette product can be improved, improve the quality of product.The humectant that China's production of cigarettes adopts is mainly the polyhydroxy substances such as propylene glycol, glycerine, sorbyl alcohol, it has certain effect in maintenance cigarette shreds water ratio and improvement suction comfort level, but to the maintenance DeGrain of moisture in cut tobacco in high humidity or low moisture environments.
Polysaccharide is contained abundant and of a great variety at occurring in nature.In prior art, often using a certain single polysaccharide as additive application in cigarette primary processing, through test prove due to the defect on single polysaccharide component property, its humectation effect is poor.Adopt ternary system polysaccharide blend, utilize the electrostatic interaction in not homopolysaccharide between different macromole to produce co-mixing system, it can be used as humectant and the report be applied in cigarette primary processing there is not yet.
Summary of the invention
The object of the invention is to for deficiency of the prior art, the preparation method of a kind of Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide is provided, the peculiar property of single polysaccharide can either be brought into play by obtained tertiary blending polysaccharide, improves again its comprehensive humid keeping performance.
Meanwhile, another object of the present invention is also to provide described Rhizoma amorphophalli glucomannan, chitosan and the application of Xylo-Mucine tertiary blending polysaccharide in cigarette primary processing.
* except as otherwise noted, percentage ratio of the present invention is mass percent.
Object of the present invention is achieved by the following technical programs.
A preparation method for Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, is characterized in that: comprise the following steps:
(1) with deionized water respectively compound concentration be the konjak portuguese gansu polyose sugar soln of 3% and the chitosan solution of 1%, konjak portuguese gansu polyose sugar soln 10 ~ 20 parts, chitosan solution 5 ~ 10 parts is measured according to parts by weight, binary polysaccharide mixing solutions is obtained after mixing, for subsequent use;
(2) according to Xylo-Mucine: the ratio of weight and number of binary polysaccharide mixing solutions is the ratio of 5 ~ 10 parts: 1000 parts, Xylo-Mucine is joined after mixing in binary polysaccharide mixing solutions, its pH value to 7.0 is regulated again with the sodium hydroxide solution of 8%, obtain neutral mixing solutions, for subsequent use;
(3) mixing polysaccharide powder is obtained after the neutral mixing solutions that step (2) obtains being placed in the dry 1.5h of BUCHIB-290Mini type spray drying device; Wherein, the rotating speed of described spray drying device is 15000 ~ 30000rpm, and inlet temperature is 100 ~ 130 DEG C, temperature out is 70 ~ 90 DEG C;
(4) mixing polysaccharide powder is joined in the deionized water stirred, be mixed with the polysaccharide mixing solutions of 2% ~ 4%, and continuing to stir 1h, to be placed on temperature be heating 30 minutes in the water-bath of 70 ~ 90 DEG C, takes out cooling; According to glycerine: the ratio of weight and number of 2% ~ 4% polysaccharide mixing solutions is the ratio of 3 ~ 5 parts: 100 parts, glycerine is joined in 2% ~ 4% polysaccharide mixing solutions and mix, obtain stable tertiary blending polysaccharide emulsion;
(5) tertiary blending polysaccharide emulsion is placed in vacuum degassing machine, under 0.09MPa normal atmosphere after degassed 30 ~ 45 minutes, the emulsion of 120ml is pipetted in self-control HDPE smooth plate with transfer pipet, and to be positioned over the constant temperature perseverance that temperature is 25 ± 1 DEG C, humidity is 53 ± 1% be loft drier inner drying, time of drying is 1h, the film on smooth plate after drying is taken off, pulverize after namely obtain Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.
Described Rhizoma amorphophalli glucomannan, chitosan and the application of Xylo-Mucine tertiary blending polysaccharide in cigarette primary processing, it is characterized in that: described Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide deionized water are formulated as the solution of 1%, adding in pipe tobacco by gained solution according to 0.3% ~ 1.2% of cigarette shreds weight, is measure its humectation effect to pipe tobacco under the condition of 30% and 80% in humidity.
Compared with prior art, the present invention has following beneficial effect:
1, instant invention overcomes the deficiency of existing single polysaccharide adding technique, the tertiary blending polysaccharide prepared significantly can promote the water retention property of tobacco in low humidity and high humidity environment.
2, the ternary polysaccharide stable in physicochemical property for preparing of the present invention, is not vulnerable to hot and humid impact and the change of physico-chemical property occurs, significantly can promote the degrading resistance property of tobacco in tobacco processing course.
3, Rhizoma amorphophalli glucomannan required for the present invention, chitosan and Xylo-Mucine, sufficient raw, is fully utilized to it waste also can avoiding polysaccharide resource.Meanwhile, altogether dry modified polysaccharide and film technique simple, be easy to industrialization promotion.
Accompanying drawing explanation
Fig. 1 is that in embodiment 3, gained tertiary blending polysaccharide tests schematic diagram to the humid keeping performance of pipe tobacco under RH=30% humidity;
Fig. 2 is that in embodiment 3, gained tertiary blending polysaccharide tests schematic diagram to the humid keeping performance of pipe tobacco under RH=80% humidity.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.Should be appreciated that embodiment is to make object of the present invention, technical scheme and advantage clearly, but protection scope of the present invention is not limited thereto, any change of expecting without creative work or replacement, all should be encompassed in protection scope of the present invention.
Embodiment 1
The preparation method of Rhizoma amorphophalli glucomannan described in the present embodiment, chitosan and Xylo-Mucine tertiary blending polysaccharide, is characterized in that: comprise the following steps:
(1) with deionized water respectively compound concentration be the konjak portuguese gansu polyose sugar soln of 3% and the chitosan solution of 1%, measure konjak portuguese gansu polyose sugar soln 10 parts, chitosan solution 5 parts according to parts by weight, after mixing binary polysaccharide mixing solutions, for subsequent use;
(2) according to Xylo-Mucine: the ratio of weight and number of binary polysaccharide mixing solutions is the ratio of 5 parts: 1000 parts, Xylo-Mucine is joined after mixing in binary polysaccharide mixing solutions, its pH value to 7.0 is regulated again with the sodium hydroxide solution of 8%, obtain neutral mixing solutions, for subsequent use;
(3) mixing polysaccharide powder is obtained after the neutral mixing solutions that step (2) obtains being placed in the dry 1.5h of BUCHIB-290Mini type spray drying device; Wherein, the rotating speed of described spray drying device is 15000rpm, and inlet temperature is 110 DEG C, temperature out is 70 DEG C;
(4) mixing polysaccharide powder is joined in the deionized water stirred, be mixed with the polysaccharide mixing solutions of 2%, and continuing to stir 1h, to be placed on temperature be heating 30 minutes in the water-bath of 75 DEG C, takes out cooling; According to glycerine: the ratio of weight and number of 2% polysaccharide mixing solutions is the ratio of 3 parts: 100 parts, glycerine is joined in 2% polysaccharide mixing solutions and mix, obtain stable tertiary blending polysaccharide emulsion;
(5) tertiary blending polysaccharide emulsion is placed in vacuum degassing machine, under 0.09MPa normal atmosphere after degassed 30 minutes, the emulsion of 120ml is pipetted in self-control HDPE smooth plate with transfer pipet, and to be positioned over the constant temperature perseverance that temperature is 25 ± 1 DEG C, humidity is 53 ± 1% be loft drier inner drying, time of drying is 1h, the film on smooth plate after drying is taken off, pulverize after namely obtain Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.
Wherein, described self-control HDPE smooth plate is the high density polyethylene(HDPE) plate of 0.5 × 0.5 × 0.02m.
Embodiment 2
The preparation method of Rhizoma amorphophalli glucomannan described in the present embodiment, chitosan and Xylo-Mucine tertiary blending polysaccharide, is characterized in that: comprise the following steps:
(1) with deionized water respectively compound concentration be the konjak portuguese gansu polyose sugar soln of 3% and the chitosan solution of 1%, measure konjak portuguese gansu polyose sugar soln 15 parts, chitosan solution 7 parts according to parts by weight, after mixing binary polysaccharide mixing solutions, for subsequent use;
(2) according to Xylo-Mucine: the ratio of weight and number of binary polysaccharide mixing solutions is the ratio of 8 parts: 1000 parts, Xylo-Mucine is joined after mixing in binary polysaccharide mixing solutions, its pH value to 7.0 is regulated again with the sodium hydroxide solution of 8%, obtain neutral mixing solutions, for subsequent use;
(3) mixing polysaccharide powder is obtained after the neutral mixing solutions that step (2) obtains being placed in the dry 1.5h of BUCHIB-290Mini type spray drying device; Wherein, the rotating speed of described spray drying device is 18000rpm, and inlet temperature is 120 DEG C, temperature out is 80 DEG C;
(4) mixing polysaccharide powder is joined in the deionized water stirred, be mixed with the polysaccharide mixing solutions of 3%, and continuing to stir 1h, to be placed on temperature be heating 30 minutes in the water-bath of 85 DEG C, takes out cooling; According to glycerine: the ratio of weight and number of 3% polysaccharide mixing solutions is the ratio of 4 parts: 100 parts, glycerine is joined in 3% polysaccharide mixing solutions and mix, obtain stable tertiary blending polysaccharide emulsion;
(5) tertiary blending polysaccharide emulsion is placed in vacuum degassing machine, under 0.09MPa normal atmosphere after degassed 40 minutes, the emulsion of 120ml is pipetted in self-control HDPE smooth plate with transfer pipet, and to be positioned over the constant temperature perseverance that temperature is 25 ± 1 DEG C, humidity is 53 ± 1% be loft drier inner drying, time of drying is 1h, the film on smooth plate after drying is taken off, pulverize after namely obtain Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.
Wherein, described self-control HDPE smooth plate is the high density polyethylene(HDPE) plate of 0.5 × 0.5 × 0.02m.
Embodiment 3
The preparation method of Rhizoma amorphophalli glucomannan described in the present embodiment, chitosan and Xylo-Mucine tertiary blending polysaccharide, is characterized in that: comprise the following steps:
(1) with deionized water respectively compound concentration be the konjak portuguese gansu polyose sugar soln of 3% and the chitosan solution of 1%, konjak portuguese gansu polyose sugar soln 18 parts, chitosan solution 10 parts is measured according to parts by weight, binary polysaccharide mixing solutions is obtained after mixing, for subsequent use;
(2) according to Xylo-Mucine: the ratio of weight and number of binary polysaccharide mixing solutions is the ratio of 10 parts: 1000 parts, Xylo-Mucine is joined after mixing in binary polysaccharide mixing solutions, its pH value to 7.0 is regulated again with the sodium hydroxide solution of 8%, obtain neutral mixing solutions, for subsequent use;
(3) mixing polysaccharide powder is obtained after the neutral mixing solutions that step (2) obtains being placed in the dry 1.5h of BUCHIB-290Mini type spray drying device; Wherein, the rotating speed of described spray drying device is 30000rpm, and inlet temperature is 130 DEG C, temperature out is 90 DEG C;
(4) mixing polysaccharide powder is joined in the deionized water stirred, be mixed with the polysaccharide mixing solutions of 4%, and continuing to stir 1h, to be placed on temperature be heating 30 minutes in the water-bath of 90 DEG C, takes out cooling; According to glycerine: the ratio of weight and number of 4% polysaccharide mixing solutions is the ratio of 5 parts: 100 parts, glycerine is joined in 4% polysaccharide mixing solutions and mix, obtain stable tertiary blending polysaccharide emulsion;
(5) tertiary blending polysaccharide emulsion is placed in vacuum degassing machine, under 0.09MPa normal atmosphere after degassed 45 minutes, the emulsion of 120ml is pipetted in self-control HDPE smooth plate with transfer pipet, and to be positioned over the constant temperature perseverance that temperature is 25 ± 1 DEG C, humidity is 53 ± 1% be loft drier inner drying, time of drying is 1h, the film on smooth plate after drying is taken off, pulverize after namely obtain Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.
Wherein, described self-control HDPE smooth plate is the high density polyethylene(HDPE) plate of 0.5 × 0.5 × 0.02m.
Embodiment 4
The preparation method of Rhizoma amorphophalli glucomannan described in the present embodiment, chitosan and Xylo-Mucine tertiary blending polysaccharide, is characterized in that: comprise the following steps:
(1) with deionized water respectively compound concentration be the konjak portuguese gansu polyose sugar soln of 3% and the chitosan solution of 1%, measure konjak portuguese gansu polyose sugar soln 20 parts, chitosan solution 8 parts according to parts by weight, after mixing binary polysaccharide mixing solutions, for subsequent use;
(2) according to Xylo-Mucine: the ratio of weight and number of binary polysaccharide mixing solutions is the ratio of 10 parts: 1000 parts, Xylo-Mucine is joined after mixing in binary polysaccharide mixing solutions, its pH value to 7.0 is regulated again with the sodium hydroxide solution of 8%, obtain neutral mixing solutions, for subsequent use;
(3) mixing polysaccharide powder is obtained after the neutral mixing solutions that step (2) obtains being placed in the dry 1.5h of BUCHIB-290Mini type spray drying device; Wherein, the rotating speed of described spray drying device is 25000rpm, and inlet temperature is 100 DEG C, temperature out is 85 DEG C;
(4) mixing polysaccharide powder is joined in the deionized water stirred, be mixed with the polysaccharide mixing solutions of 4%, and continuing to stir 1h, to be placed on temperature be heating 30 minutes in the water-bath of 90 DEG C, takes out cooling; According to glycerine: the ratio of weight and number of 4% polysaccharide mixing solutions is the ratio of 5 parts: 100 parts, glycerine is joined in 4% polysaccharide mixing solutions and mix, obtain stable tertiary blending polysaccharide emulsion;
(5) tertiary blending polysaccharide emulsion is placed in vacuum degassing machine, under 0.09MPa normal atmosphere after degassed 45 minutes, the emulsion of 120ml is pipetted in self-control HDPE smooth plate with transfer pipet, and to be positioned over the constant temperature perseverance that temperature is 25 ± 1 DEG C, humidity is 53 ± 1% be loft drier inner drying, time of drying is 1h, the film on smooth plate after drying is taken off, pulverize after namely obtain Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.
Wherein, described self-control HDPE smooth plate is the high density polyethylene(HDPE) plate of 0.5 × 0.5 × 0.02m.
Application Example 1
Rhizoma amorphophalli glucomannan embodiment 3 prepared, chitosan and Xylo-Mucine tertiary blending polysaccharide powder deionized water are mixed with the solution of 1%, then add in pipe tobacco according to 0.5% of tobacco quality; Glycerine using 1% adds in pipe tobacco as comparison test group according to 0.5% of tobacco quality; Not add the tobacco of any humectant as a control group.Be under the condition of 30% and 80%, measure its humectation effect to pipe tobacco respectively in humidity.
(1) under low-moisture conditions (RH=30%) humid keeping performance test-results as shown in Figure 1, in experimentation, moisture content of cut tobaccos mean value respectively, tertiary blending polysaccharide 12.70%, glycerine 11.39%, contrast 11.00%.Compared with test group, the pipe tobacco adding 0.5% Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, than the pipe tobacco adding glycerine, has better water retention property under low humidity conditions.
(2) under high humidity, (RH=80%) humid keeping performance test-results is as shown in Figure 2.In experimentation, moisture content of cut tobaccos mean value is respectively, tertiary blending polysaccharide 15.31%, glycerine 18.29%, contrast 17.61%, compared with test group, the pipe tobacco adding 0.5% Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, than the pipe tobacco adding glycerine, has better block-water performance under high humidity conditions.
Application Example 2
Rhizoma amorphophalli glucomannan embodiment 2 prepared, chitosan and Xylo-Mucine tertiary blending polysaccharide powder deionized water are mixed with the solution of 1%, then add in pipe tobacco according to 0.3% of tobacco quality; Glycerine with 1% adds in pipe tobacco, as comparison test group according to 0.3% of tobacco quality; Not add the tobacco of any humectant as a control group.Be under the condition of 30% and 80%, measure its humectation effect to pipe tobacco respectively in humidity.
(1) (RH=30%) under low-moisture conditions, in experimentation, moisture content of cut tobaccos mean value respectively, tertiary blending polysaccharide 12.33%, glycerine 11.12%, contrast 10.85%.Compared with test group, the pipe tobacco adding 0.3% Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, than the pipe tobacco adding glycerine, has better water retention property under low humidity conditions.
(2) under high humidity, in experimentation, moisture content of cut tobaccos mean value is respectively, tertiary blending polysaccharide 16.34%, glycerine 17.85%, contrast 17.33%, compared with test group, the pipe tobacco adding 0.3% Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, than the pipe tobacco adding glycerine, has better block-water performance under high humidity conditions.
Application Example 3
Rhizoma amorphophalli glucomannan embodiment 4 prepared, chitosan and Xylo-Mucine tertiary blending polysaccharide powder deionized water are mixed with the solution of 1%, then add in pipe tobacco according to 1.2% of tobacco quality; Glycerine with 1% adds in pipe tobacco, as comparison test group according to 1.2% of tobacco quality; Not add the tobacco of any humectant as a control group.Be under the condition of 30% and 80%, measure its humectation effect to pipe tobacco respectively in humidity.
(1) (RH=30%) under low-moisture conditions, in experimentation, moisture content of cut tobaccos mean value respectively, tertiary blending polysaccharide 12.99%, glycerine 11.68%, contrast 10.79%.Compared with test group, the pipe tobacco adding 0.3% Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, than the pipe tobacco adding glycerine, has better water retention property under low humidity conditions.
(2) under high humidity, in experimentation, moisture content of cut tobaccos mean value is respectively, tertiary blending polysaccharide 15.12%, glycerine 18.17%, contrast 17.45%, compared with test group, the pipe tobacco adding 1.2% Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, than the pipe tobacco adding glycerine, has better block-water performance under high humidity conditions.
Claims (3)
1. a preparation method for Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide, is characterized in that: comprise the following steps:
(1) with deionized water respectively compound concentration be the konjak portuguese gansu polyose sugar soln of 3% and the chitosan solution of 1%, konjak portuguese gansu polyose sugar soln 10 ~ 20 parts, chitosan solution 5 ~ 10 parts is measured according to parts by weight, binary polysaccharide mixing solutions is obtained after mixing, for subsequent use;
(2) according to Xylo-Mucine: the ratio of weight and number of binary polysaccharide mixing solutions is the ratio of 5 ~ 10 parts: 1000 parts, Xylo-Mucine is joined after mixing in binary polysaccharide mixing solutions, its pH value to 7.0 is regulated again with the sodium hydroxide solution of 8%, obtain neutral mixing solutions, for subsequent use;
(3) mixing polysaccharide powder is obtained after the neutral mixing solutions that step (2) obtains being placed in the dry 1.5h of BUCHIB-290Mini type spray drying device;
(4) mixing polysaccharide powder is joined in the deionized water stirred, be mixed with the polysaccharide mixing solutions of 2% ~ 4%, and continuing to stir 1h, to be placed on temperature be heating 30 minutes in the water-bath of 70 ~ 90 DEG C, takes out cooling; According to glycerine: the ratio of weight and number of 2% ~ 4% polysaccharide mixing solutions is the ratio of 3 ~ 5 parts: 100 parts, glycerine is joined in 2% ~ 4% polysaccharide mixing solutions and mix, obtain stable tertiary blending polysaccharide emulsion;
(5) tertiary blending polysaccharide emulsion is placed in vacuum degassing machine, under 0.09MPa normal atmosphere after degassed 30 ~ 45 minutes, the emulsion of 120ml is pipetted in self-control HDPE smooth plate with transfer pipet, and to be positioned over the constant temperature perseverance that temperature is 25 ± 1 DEG C, humidity is 53 ± 1% be loft drier inner drying, time of drying is 1h, the film on smooth plate after drying is taken off, pulverize 94 after namely obtain Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide.
2. the preparation method of Rhizoma amorphophalli glucomannan, chitosan and Xylo-Mucine tertiary blending polysaccharide as claimed in claim 1, it is characterized in that: described in step (3), the rotating speed of spray drying device is 15000 ~ 30000rpm, inlet temperature is 100 ~ 130 DEG C, temperature out is 70 ~ 90 DEG C.
3. a Rhizoma amorphophalli glucomannan, chitosan and the application of Xylo-Mucine tertiary blending polysaccharide in cigarette primary processing.
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| CN106723349A (en) * | 2016-12-28 | 2017-05-31 | 云南中烟工业有限责任公司 | A kind of olive polyphenol nano liposomes composite membrane and its application in cigarette |
| CN111642255A (en) * | 2020-06-12 | 2020-09-11 | 贵州石阡佛顶山野生油茶油业有限公司 | Low-temperature drying method for oil tea fruits |
| CN112812379A (en) * | 2021-02-03 | 2021-05-18 | 华南理工大学 | Degradable film and preparation method thereof |
| CN113388479A (en) * | 2021-06-29 | 2021-09-14 | 黔南民族师范学院 | Rosa roxburghii fruit wine composite clarifying agent and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106723349A (en) * | 2016-12-28 | 2017-05-31 | 云南中烟工业有限责任公司 | A kind of olive polyphenol nano liposomes composite membrane and its application in cigarette |
| CN111642255A (en) * | 2020-06-12 | 2020-09-11 | 贵州石阡佛顶山野生油茶油业有限公司 | Low-temperature drying method for oil tea fruits |
| CN111642255B (en) * | 2020-06-12 | 2022-04-22 | 贵州石阡佛顶山野生油茶油业有限公司 | Low-temperature drying method for oil tea fruits |
| CN112812379A (en) * | 2021-02-03 | 2021-05-18 | 华南理工大学 | Degradable film and preparation method thereof |
| CN112812379B (en) * | 2021-02-03 | 2022-01-04 | 华南理工大学 | Degradable film and preparation method thereof |
| CN113388479A (en) * | 2021-06-29 | 2021-09-14 | 黔南民族师范学院 | Rosa roxburghii fruit wine composite clarifying agent and preparation method thereof |
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Application publication date: 20151021 |