CN106279467A - A kind of method utilizing tannic extract to fix natural rubber latex proteins matter - Google Patents
A kind of method utilizing tannic extract to fix natural rubber latex proteins matter Download PDFInfo
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- CN106279467A CN106279467A CN201610837839.XA CN201610837839A CN106279467A CN 106279467 A CN106279467 A CN 106279467A CN 201610837839 A CN201610837839 A CN 201610837839A CN 106279467 A CN106279467 A CN 106279467A
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- natural rubber
- tannic extract
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/04—Purifying; Deproteinising
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- General Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of method utilizing tannic extract to fix natural rubber latex proteins matter, it is characterized in that: add the ratio of the tannic extract solid of more than 0.2 weight portion according to the natural rubber latex Ruzhong of every 100 weight portions, tannic extract is added natural rubber latex Ruzhong, then according to the conventional formulations of rubber and technique, complete the film forming of rubber, leaching, dry, sulfuration processing, prepared rubber can extract water-soluble protein content less than 100 μ g/dm2；Described rubber is the natural rubber gloves goods that dipping manufactures；Described natural rubber latex is high ammonia concentrated latex；Described tannic extract is commercially available commodity powdered extracts.Its good effect is: with tannic extract cheap and easy to get for protein fixative, solves the protein allergy problem of natural rubber products, improves the mechanical property of rubber, ageing resistace and hydrophilicity, meanwhile, expands the range of application of tannic extract.
Description
Technical field
The invention belongs to the processing technology field of rubber, be specifically related to one and utilize tannic extract to fix natural rubber latex proteins
The method of matter.
Background technology
Nature rubber latex is a kind of biosynthetic high polymer aqua type colloidal dispersion, is mainly composed of rubber hydrocarbon (poly-
Isoprene), water, non-rubber substance, wherein non-rubber substance includes the molten thing of protein, lipoid, acetone, the hydrotrope, inorganic salt etc..
Heveatex has technological operation and the physical property of excellence, and its wet gel strength is high, elastic greatly, creep is little, is widely used in
Produce dipped article, including medical gloves, core industry special type protection glove, balloon etc..For versatility, there is no other at present
Material can substitute completely, and natural rubber remains being preferably selected of virus-isolating, infective micro-organisms and protection.
Natural rubber latex contains two proteinoid, and a class is and the hmw protein of rubber hydrocarbon particle strong bonded,
The low molecule water soluble protein that one class is present in milk surum.In natural rubber dipped article, protein is commonly present distribution not
Uniform phenomenon, as in natural emulsion glove, the protein of about 95% is distributed in glove interior surface, the water solublity egg wherein remained
White matter is to cause the sensitization source of protein I type allergy.It is even dead that severe allergy person there will be shock.Natural for overcoming
The allergic problem of rubber latex proteins matter, the scheme of solution is divided three classes.One is, removes isolating protein, including repeatedly leaching rubber
Goods, latex is centrifuged, utilize protease acid or basic hydrolysis protein, radiation cured latex after carry out centrifugal treating,
Adsorbent protein, this scheme is utilized to be disadvantageous in that, along with the decline of protein content in latex, latex glue
Body system stability declines, and the mechanical property of the dry rate of rubber and antioxygenic property, rubber also can be by bad
Impact.Two are, chloridized makes protein denaturation, but this can make the percentage elongation of rubber decline, and affects the use of goods.Three
It is to utilize fixative stable protein, fixative used to include dialdehyde sodium alginate (Chinese invention patent, application number
200910041291.8, authorized announcement date on July 6th, 2011), chitosan/sericin (Chinese invention patent, application number
200910198482.5, authorized announcement date on July 20th, 2011), sericin compositions (Chinese invention patent, application number
200910197790.6, authorized announcement date on May 30th, 2012), sericin grafting aqueous polyurethane (Chinese invention patent, application
Numbers 201210470393.3, June 4 2014 Shen Qing Publication day), this scheme can not only effectively reduce natural rubber latex or
Content of soluble protein in natural rubber products, moreover it is possible to the physical and mechanical properties of natural rubber products is produced favourable work
With, but the deficiency of the program is, fixative is required to prepare beforehand through complicated reaction, and the productivity of fixative is low, instead
Condition difficulty is answered to control so that the cost of these fixatives is high, and in natural rubber latex processing factory or natural rubber products factory very
Difficulty is prepared in situ and uses.Therefore, develop a kind of utilize wide material sources, inexpensive fixative process natural rubber latex egg
The method of white matter, has become as the urgent needs of this area.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, it is provided that one utilizes tannic extract to fix natural rubber latex proteins
The method of matter, to solve protein allergy problem in natural rubber products.
For completing the task of the present invention, applicant has analysed in depth existing natural rubber latex proteins matter fixing means
Feature.On this basis, in conjunction with natural rubber latex proteins matter and the feature of afforestation product tannic extract, propose to utilize tannic extract to fix sky
So method of rubber latex proteins matter.
What the present invention provided utilizes the method that tannic extract fixes natural rubber latex proteins matter, it is characterised in that: tannic extract is added
Enter natural rubber latex Ruzhong, then according to the conventional formulations of rubber and technique, complete the film forming of rubber, leaching, do
Dry, sulfuration processing, can extract water-soluble protein content less than 100 μ g/dm in prepared rubber2；Described rubber
Goods are the natural rubber gloves goods that dipping manufactures；Described natural rubber latex is high ammonia concentrated latex；Described tannic extract
For commercially available commodity powdered extracts.
For achieving the above object, what the present invention proposed utilizes the method that tannic extract fixes natural rubber latex proteins matter, successively
According to following steps, tannic extract is added in latex:
1) the pure process of the increasing of tannic extract: tannic extract is configured to the aqueous solution that mass percentage content is 10～30%, room temperature is put
Put 30～90 minutes, be then centrifuged 15～30 minutes under the conditions of 6000～8000 revs/min, collect the supernatant, increased
Pure tannic extract solution；
2) acid-base value regulation: with mass percentage content be 5～15% ammonia spirit will above-mentioned 1) the pure tannic extract of increasing
The pH value of solution regulates to 5.5～8；
3) being blended of tannic extract solution and natural rubber latex: at ambient temperature, according to the natural rubber of every 100 weight portions
Latex adds the ratio of the tannic extract solid of more than 0.2 weight portion, by above-mentioned 2) tannic extract solution add natural rubber latex Ruzhong,
Stirring makes tannic extract mix homogeneously with latex, and mixing speed is 60～120 revs/min.
What the present invention provided utilizes the method that tannic extract fixes natural rubber latex proteins matter, make use of tannic extract molecule dexterously
H-bonding capability between amino, carboxyl and tannic extract molecule and egg in middle phenolic hydroxyl group and natural rubber latex proteins matter molecule
Hydrophobic bond binding ability between white matter molecule.Low molecule water soluble protein is made to divide by the interaction of tannic extract with protein
Son becomes big.In natural rubber film forming procedure, diffusion and the migration of the protein molecule that these changes are big are obstructed, it is intended to rest on
The inside of rubber, it is to avoid protein water-soluble go out rear sensitisation problems.Tannic extract has hydrophilic and non-oxidizability, and molecular weight is concentrated
In the range of 500～3000, less than natural rubber latex proteins matter.For the natural rubber latex that with the addition of tannic extract,
In its film forming procedure, not yet occur that combine and that molecular weight is little tannic extract molecular diffusion rates fast, easily to rubber system with protein
Product surface migration, and interacted by the hydrophobic bond between tannic extract molecule and rubber hydrocarbon (polyisoprene) molecule, stop
In rubber article, these tannic extract molecules can not only effectively capture the protein molecule of rubber article, but also can
Improve natural rubber products hydrophilic and ageing resistace.Polyisoprene molecule contains a large amount of unsaturated double-bond, is vulcanizing
Cheng Zhong, these double bonds crosslink chemical reaction and form dimensional network structure after opening, give rubber intensity, elasticity, chi
Very little stability and application.Hydrophobic bond binding ability, tannic extract molecule and protein is there is between rubber chain and tannic extract molecule
Intermolecular hydrogen bond, the hydrophobic bond binding ability of existing, therefore, tannic extract is as the bridge between rubber hydrocarbon and protein, natural rubber
In glue goods sulfidation, help lend some impetus to rubber hydrocarbon, tannic extract, protein three component further combined with, formed crosslink density
Bigger network structure, improves the mechanical property such as hot strength of rubber.It is natural that what the present invention provided utilizes tannic extract to fix
The method of rubber latex proteins matter, can not only solve the protein allergy problem of natural rubber products, overcomes traditional latex egg
The shortcoming that white matter fixative preparation process is complicated, process conditions difficulty controls, cost is high, moreover it is possible to improve the mechanical property of rubber
And ageing resistace, have the advantages that to achieve many things at one stroke.
Advantages of the present invention:
1) environmental friendliness, low cost: tannic extract is a kind of natural product deriving from plant, has wide material sources, price low
Feature honest and clean, eco-friendly.What the present invention provided utilizes the method that tannic extract fixes natural rubber latex proteins matter, it is not necessary to evergreen chinquapin
Glue carries out chemical modification process, will not use organic solvent, will not have a negative impact environment, is a kind of environmental friendliness and warp
The method of Ji.
2) feasible process, easily promote: what the present invention provided utilizes the method that tannic extract fixes natural rubber latex proteins matter, is
Directly add in natural rubber latex Ruzhong and increase pure tannic extract solution, then according to natural rubber products conventional formulations and technique, complete
Become film forming, leaching, dry, sulfuration processing, it is not necessary to change processing technique and the condition of rubber, it is not required that increase new
Equipment.Increasing of tannic extract is pure, acid-base value regulates and tannic extract is simple with the blending operations of latex, easy to control, can be in rubber mill
Scene completes, easy popularization and application.
3) tannic extract range of application is expanded: tannic extract is a kind of traditional afforestation product, is mainly used as at process hides tanning agent, boiler water
Reason agent, timber work glue etc..Being affected by factors such as petrochemical industry low costs, the application market of tannic extract is significantly shunk.This
Tannic extract is developed for fixing natural rubber latex proteins matter by invention, is a kind of new opplication to tannic extract, contributes to expanding woodsization
Product utilize scope.
Detailed description of the invention
Embodiment is given below so that the present invention will be described in more detail, it is necessary to be pointed out that following example can not be managed
Solve as limiting the scope of the invention, the person skilled in the art in this field according to present invention, the present invention is made one
A little nonessential improvement and adjustment still belong to protection scope of the present invention.
Embodiment 1
Commercially available commodity powdery Acacia mangiumwilld tannic extract is configured to the aqueous solution that mass percentage content is 10%, and room temperature is put
Put 30 minutes.By Acacia mangiumwilld solution under the conditions of 6000 revs/min centrifugal 15 minutes, collect the supernatant, obtain increasing pure
Acacia mangiumwilld solution.With the ammonia spirit that mass percentage content is 15%, the pH value increasing pure Acacia mangiumwilld solution is regulated extremely
5.5.At ambient temperature, the solid Acacia mangiumwilld tannic extract of 1 weight portion is added according to the natural rubber latex Ruzhong of every 100 weight portions
Ratio, the Acacia mangiumwilld solution regulating pH value is added in high ammonia concentrated natural rubber latex, stirring make Acacia mangiumwilld with
Latex mix homogeneously, mixing speed is 120 revs/min.According to dipping manufacture natural rubber gloves goods conventional formulations and
Technique, completes to impregnate film forming, leaching, dry, sulfuration processing.Detect the extracted water-soluble protein content of these goods, stretching
The hydrophilic of intensity, elongation at break and this product surface, and the rubber obtained with the common process processed without tannic extract
Goods make the comparison of respective performances.
Embodiment 2
Commercially available commodity rubber powdered extracts is configured to the aqueous solution that mass percentage content is 30%, and room temperature places 60
Minute.Rubber solution is centrifuged 30 minutes under the conditions of 7000 revs/min, collects the supernatant, obtain increasing pure rubber solution.
With the ammonia spirit that mass percentage content is 10%, the pH value increasing pure rubber solution is regulated to 8.At ambient temperature, press
Add the ratio of the solid rubber tannic extract of 0.2 weight portion according to the natural rubber latex Ruzhong of every 100 weight portions, pH value will be regulated
Rubber solution adds in high ammonia concentrated natural rubber latex, and stirring makes rubber mix homogeneously with latex, and mixing speed is 90 revs/min
Clock.The conventional formulations of natural rubber gloves goods manufactured according to dipping and technique, complete to impregnate film forming, leaching, be dried, sulfuration
Processing.Detect the parent of the extracted water-soluble protein content of these goods, hot strength, elongation at break and this product surface
Aqueous, and the rubber obtained with the common process that processes without tannic extract makees the comparison of respective performances.
Embodiment 3
Commercially available commodity Fructus Myricae rubrae powdered extracts is configured to the aqueous solution that mass percentage content is 20%, and room temperature places 90
Minute.Fructus Myricae rubrae solution is centrifuged 30 minutes under the conditions of 8000 revs/min, collects the supernatant, obtain increasing pure Fructus Myricae rubrae solution.
With the ammonia spirit that mass percentage content is 5%, the pH value increasing pure Fructus Myricae rubrae solution is regulated to 6.5.At ambient temperature,
Add the ratio of the solid myrica extract of 2 weight portions according to the natural rubber latex Ruzhong of every 100 weight portions, pH value will be regulated
Fructus Myricae rubrae solution adds in high ammonia concentrated natural rubber latex, and stirring makes Fructus Myricae rubrae mix homogeneously with latex, and mixing speed is 60 revs/min
Clock.The conventional formulations of natural rubber gloves goods manufactured according to dipping and technique, complete to impregnate film forming, leaching, be dried, sulfuration
Processing.Detect the parent of the extracted water-soluble protein content of these goods, hot strength, elongation at break and this product surface
Aqueous, and the rubber obtained with the common process that processes without tannic extract makees the comparison of respective performances.
The extracted water-soluble protein content of rubber of embodiment 1～3 acquisition, hot strength, elongation at break
As shown in table 1 with the hydrophilic on surface (contact angle) test result.Rubber embodiment 1～3 obtained is empty 70 DEG C of heat
After aging 168 hours of gas, rubber can extract water-soluble protein content, hot strength, elongation at break and contact angle
Test result is as shown in table 2.Tannic extract is added natural rubber latex Ruzhong, effectively secures latex protein, natural rubber products
And the extracted water-soluble protein content after heat ageing processes is respectively less than 100 μ g/dm2, meet ASTM D 3577-
2009 international standards and the limitation requirement of GB 24788-2009 domestic standard, solve natural rubber latex proteins matter allergic problem.Will
Tannic extract adds natural rubber latex Ruzhong, improves hot strength and the elongation at break of rubber, and the rubber system of improve
The heat aging property of product.Tannic extract is added natural rubber latex Ruzhong, reduces the contact angle of rubber article, improve rubber
The hydrophilic of product surface.
The extracted water-soluble protein content of rubber of table 1 embodiment 1～3, hot strength, elongation at break and
Contact angle
Table 2 after hot air aging processes, the extracted water-soluble protein content of the rubber of embodiment 1～3,
Hot strength, elongation at break and contact angle
Claims (2)
1. one kind utilizes the method that natural rubber latex proteins matter fixed by tannic extract, it is characterised in that: tannic extract is added natural rubber
In latex, then according to the conventional formulations of rubber and technique, complete the film forming of rubber, leaching, be dried, sulfuration adds
Work, can extract water-soluble protein content less than 100 μ g/dm in prepared rubber2；Described rubber is dipping
The natural rubber gloves goods manufactured；Described natural rubber latex is high ammonia concentrated latex；Described tannic extract is commercially available business
Product powdered extracts.
The method utilizing tannic extract to fix natural rubber latex proteins matter the most according to claim 1, it is characterised in that successively
According to following steps, tannic extract is added in latex:
1) the pure process of the increasing of tannic extract: tannic extract is configured to the aqueous solution that mass percentage content is 10 ~ 30%, room temperature places 30 ~ 90
Minute, then it is centrifuged 15 ~ 30 minutes under the conditions of 6000 ~ 8000 revs/min, collects the supernatant, obtain increasing pure tannic extract molten
Liquid；
2) acid-base value regulation: will above-mentioned 1 with the ammonia spirit that mass percentage content is 5 ~ 15%) increasing pure tannic extract solution
PH value regulates to 5.5 ~ 8；
3) being blended of tannic extract solution and natural rubber latex: at ambient temperature, according to the natural rubber latex of every 100 weight portions
The ratio of tannic extract solid more than middle addition 0.2 weight portion, by above-mentioned 2) tannic extract solution add natural rubber latex Ruzhong, stirring
Making tannic extract mix homogeneously with latex, mixing speed is 60 ~ 120 revs/min.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1810868A (en) * | 2005-12-01 | 2006-08-02 | 苏州中核华东辐照有限公司 | Rubber emulsion with low soluble protein content and production method thereof |
| CN101575371A (en) * | 2009-05-13 | 2009-11-11 | 桂林奥尼斯特节能环保科技有限责任公司 | Method adopting tannin to process silkworm cocoon processing wastewater and recycle sericin protein |
| CN101613422A (en) * | 2009-07-21 | 2009-12-30 | 中山大学 | A kind of natural rubber latex protein fixation method |
| CN101851302A (en) * | 2010-05-20 | 2010-10-06 | 中国热带农业科学院农产品加工研究所 | Method for improving oxygen aging resistance of protein-removed natural rubber |
| CN105295127A (en) * | 2014-07-30 | 2016-02-03 | 江苏淼森实业有限公司 | Method for preparing sponge products from tannic acid modified natural latex |
-
2016
- 2016-09-21 CN CN201610837839.XA patent/CN106279467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810868A (en) * | 2005-12-01 | 2006-08-02 | 苏州中核华东辐照有限公司 | Rubber emulsion with low soluble protein content and production method thereof |
| CN101575371A (en) * | 2009-05-13 | 2009-11-11 | 桂林奥尼斯特节能环保科技有限责任公司 | Method adopting tannin to process silkworm cocoon processing wastewater and recycle sericin protein |
| CN101613422A (en) * | 2009-07-21 | 2009-12-30 | 中山大学 | A kind of natural rubber latex protein fixation method |
| CN101851302A (en) * | 2010-05-20 | 2010-10-06 | 中国热带农业科学院农产品加工研究所 | Method for improving oxygen aging resistance of protein-removed natural rubber |
| CN105295127A (en) * | 2014-07-30 | 2016-02-03 | 江苏淼森实业有限公司 | Method for preparing sponge products from tannic acid modified natural latex |
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