CN107603513A - A kind of method of cassava oxidized starch base adhesive - Google Patents
A kind of method of cassava oxidized starch base adhesive Download PDFInfo
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- CN107603513A CN107603513A CN201610541932.6A CN201610541932A CN107603513A CN 107603513 A CN107603513 A CN 107603513A CN 201610541932 A CN201610541932 A CN 201610541932A CN 107603513 A CN107603513 A CN 107603513A
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- oxidized starch
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- cassava oxidized
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Abstract
The invention provides a kind of preparation method of cassava oxidized starch base adhesive, the adhesive is using tapioca and polyvinyl alcohol as primary raw material, is pre-processed by the oxidation to tapioca and gelatinization etc..Use the two methods such as physics is compound and chemical crosslinking is compound to be modified with polyvinyl alcohol pretreatment cassava oxidized starch, the environmental type adhesive without formaldehyde is made.The cassava oxidized starch adhesive bonds power of gained is strong, and stability is good, and storage time is long, drying time section, and has environmentally friendly, nontoxic, low cost and other advantages, can be widely used for the numerous areas such as timber, papermaking and weaving.
Description
Technical field：
The present invention relates to a kind of preparation method of cassava oxidized starch base adhesive, the adhesive uses cassava oxidized starch
It is crosslinked with polyvinyl alcohol (PVA), then is mixed with auxiliary agent, belongs to field of adhesive technology.
Background technology：
Tapioca is cheap, and gelatinization point is low, viscosity is big, it is strong to paste liquid good film-forming property, permeability, makes as adhesive
Apparatus it is cementitious can good, safety and environmental protection and many advantages, such as economize on resources, in timber processing, Furniture manufacture, building decoration, food
The fields such as conduct industry have a wide range of applications.But existing starch-based glue stick adhesion strength is generally relatively low, water resistance is poor, flowing
Property poor, drying time length, these factors limit starch adhesive promoting the use of in timber and food service industry field, therefore
It is most important that improvement starch adhesive technology of preparing improves its performance.
The content of the invention：
Present invention aims at provide a kind of method of cassava oxidized starch base adhesive, the party to solve the above problems
Method has the advantages that oxidization time is short, adhesion strength is high, drying time is short and use range is wide.
Technical scheme is used by the present invention solves above-mentioned technical problem：The oxidized starch adhesive of the present invention is with cassava
Starch is primary raw material, and tapioca is configured to 10.0~30.0wt% starch milk, is existed by the pH value for adjusting starch milk
Reacted under alkalescence condition with oxidants such as sodium hypochlorite, it is mild acid conditions to adjust starch milk using HCl solution, adds terminator
It is prepared into cassava oxidized starch.Using ammonium persulfate initiator, cassava oxidized starch is polymerize to form crosslinking interpenetrating networks with PVA
Prepare cassava oxidized starch matrix stick.It is concretely comprised the following steps：
Described tapioca method for oxidation：Using tapioca as raw material, to three equipped with agitating device and water bath with thermostatic control
Tapioca and distilled water are added in mouth reactor, starch-containing 10.0~30.0wt% starch supernatant liquid is tuned into, at 30~40 DEG C
20~30min is stirred, adjusts pH value after reacting 20~30min, to add starch dosage 3.0 to 8~9 with 3.0wt% NaOH solution
~5.0wt% starch oxidation agent NaClO (effective chlorine >=5.5wt%), reacts 2h under 40 DEG C of stirring conditions of temperature.Use
10.0wt%HCl solution to pH value is 6, then adds 15.0wt%NaHSO3Solution is terminator, is discharged after stirring 10min, is stood
Precipitation filtering and washing, which is dried, mills, and completes the oxidation processes of tapioca.
Described cassava oxidized starch gelatinizing method：Added into three mouthfuls of reactors equipped with agitating device and water bath with thermostatic control
Cassava oxidized starch and distilled water, starch-containing 10.0~40.0wt% starch supernatant liquid is tuned into, is warming up to 55 DEG C, stirring 20~
It is gelatinized under 30min, then adjusts the floating pH value of starch to complete the paste to tapioca to 6.0~6.5 with 2.0wt% HCl solution
Change is handled.
Described cassava oxidized starch and polyvinyl alcohol crosslinked method：It is anti-to three mouthfuls equipped with agitating device and water bath with thermostatic control
Answer and PVA is added in device, be heated to 95 DEG C of stirring and dissolvings.The cassava oxidized starch added into three mouthfuls of reactors after gelatinization is newborn and stirs
Mix.Ammonium persulfate initiator, emulsifying agent are added by proportioning successively, adjusts pH value to react 1h to 3~4 with 10.0wt% HCl solution
After obtain it is stand-by after the main adhesive of tapioca base.
Embodiment：
With reference to embodiment, the present invention is further illustrated
Embodiment one：
The cassava oxidized starch adhesive of the present embodiment, is mainly made up of the raw material of following mass parts：Tapioca 20.0
Part, 60.0 parts of distilled water, 2 parts of 3.0wt%NaOH solution, 1.0 parts of 5.0wt%NaClO solution, 15.0wt%NaHSO3Solution
0.6 part, 1.5 parts of 10.0wt%HCl solution.
The preparation method of the cassava oxidized starch adhesive of this implementation, comprises the following steps：
Oxidation：120.0g distilled water is added into three mouthfuls of reactors equipped with agitating device and water bath with thermostatic control, 30~40
40.0g tapiocas are slowly added under DEG C stirring condition, and gelatinized corn starch is made.With mass fraction be 3.0wt%NaOH it is molten adjust pH value extremely
8~9.After reacting 20~30min, 3.0~5.0wt% of starch dosage starch oxidation agent NaClO 2.0g are added, are stirred at 40 DEG C
2h is reacted under the conditions of mixing.PH value is adjusted to 6 using 10.0wt%HCl solution, then adds 15.0wt%NaHSO3After solution stirring 10min
Discharging, staticly settle filtering and washing drying and mill, complete the oxidation processes of tapioca.
Gelatinization：Cassava oxidized starch emulsion in three mouthfuls of reactors is warming up to 55 DEG C, stirs and is gelatinized under 20~30min,
Then the pH value of starch supernatant liquid is adjusted with 10.0wt% HCl solution to 6.0~6.5, completes the gelatinization processing to starch.
Blending：PVA is added in three mouthfuls of reactors and is heated to 95 DEG C of stirring and dissolvings, the cassava oxidation added after gelatinization is formed sediment
Powder, the warm water that appropriate temperature is 30 DEG C is added, the viscosity of regulation system is 4.5Pa.s, obtains the main adhesive of starch base and enters
Row encapsulation, use can be stored.
Embodiment two：
The cassava oxidized starch adhesive of the present embodiment, is mainly made up of the raw material of following mass parts：Tapioca 20.0
Part, 60.0 parts of distilled water, 2.0 parts of 3.0wt%NaOH solution, 1.0 parts of 5.0wt%NaClO, 15.0wt%NaHSO3Solution 0.6
Part, 1.5 parts of 10wt%HCl solution, 32.0 parts of PVA, 3.0wt% (NH4)2S2O86.4 parts of solution.
The preparation method of the cassava oxidized starch adhesive of this implementation, comprises the following steps：
Oxidation：120.0g distilled water is added into three mouthfuls of reactors equipped with agitating device and water bath with thermostatic control, 30~40
40.0g tapiocas are slowly added under DEG C stirring condition, and gelatinized corn starch is made.PH value is adjusted with the NaOH that mass fraction is 3.0% is molten extremely
8~9.After reacting 20~30min, starch dosage 3-5wt% starch oxidation agent NaClO 2.0g are added, being 40 DEG C in temperature stirs
2h is reacted under the conditions of mixing.PH value is adjusted to 6 using 10.0wt%HCl solution, then adds 15.0wt%NaHSO3After solution stirring 10min
Discharging, staticly settle filtering and washing drying and mill, complete the oxidation processes of tapioca.
Gelatinization：Cassava oxidized starch emulsion in three mouthfuls of reactors is warming up to 55 DEG C, stirs and is gelatinized under 20~30min,
Then the pH value of starch supernatant liquid is adjusted with 10.0wt% HCl solution to 6.0~6.5, completes the gelatinization processing to starch.
Crosslinking：PVA is added in three mouthfuls of reactors and is heated to 95 DEG C and stirring and dissolving, the cassava oxidation added after gelatinization is formed sediment
Powder, ammonium persulfate initiator, emulsifying agent are added by proportioning successively, adjust pH value to react 1h to 3~4 with 10.0wt% HCl solution
Afterwards, the warm water that appropriate, temperature is 30 DEG C is added, the viscosity of regulation system is 4.5Pa.s, obtains the main adhesive of starch base and enters
Row encapsulation, use can be stored.
Cassava oxidized starch base adhesive of the present invention is compared compared with wood adhesive, is had the following advantages that：
Being aoxidized by ammonium persulfate triggers cassava oxidized starch base adhesive to shorten tack time, improves efficiency, together
When due to crosslinked action formed structure can effectively reduce destruction of the hydrone to adhesive, make water resistance, the bonding of adhesive
Performance significantly improves.By optimizing to auxiliary agent species and usage amount, when making water resistance and adhesion strength raising, the drying of adhesive
Between shorten.The three-dimensional structure that adhesive is formed after modification is more stable, is advantageous to maintain the molecular configuration of adhesive, is placed on
The degraded of chain destroys, improved the storage property of adhesive during storage, bonding.
Claims (5)
- A kind of 1. preparation method of cassava oxidized starch adhesive, it is characterised in that：First water is added to be configured to starch tapioca Breast, the pH value for adjusting starch milk are alkalescence condition, tapioca breast are reacted with hypochlorite oxidation agent, in mild acid conditions Down cassava oxidized starch is prepared into by adding terminator.Ammonium persulfate is used as initiator, by cassava oxidized starch and poly- second The interpenetrating networks that enol (PVA) polymerize formation crosslinking under certain condition prepare cassava oxidized starch adhesive.Its specific steps includes：1) under 30~40 DEG C, stirring condition, starch-containing 10.0~30.0wt% starch is made in tapioca and is floated, in starch milk In plus 3.0wt%NaOH adjust pH value to 8~9.Add 3.0~5.0wt% of starch dosage starch oxidation agent NaClO (effectively Chlorine >=5.5wt%), stir and reacted under 2h.PH value is adjusted to 6 using 10.0wt%HCl solution, then adds 15.0wt% NaHSO3, discharged after stirring 10min, staticly settle filtering and washing drying and mill, complete the oxidation processes of tapioca.2) under 30~40 DEG C, stirring condition, cassava oxidized starch is made to starch-containing 10.0~40.0wt% starch milk, risen Temperature is to 55 DEG C, stirring gelatinization, and the pH value of starch supernatant liquid is then adjusted with 10.0wt% HCl solution to 6.0~6.5, completes pair The gelatinization processing of starch.3) PVA is added in three mouthfuls of reactors and is heated to 95 DEG C of stirring and dissolvings, the cassava added into three mouthfuls of reactors after gelatinization Oxidized starch breast simultaneously stirs.Ammonium persulfate initiator, emulsifying agent are added by proportioning successively, the HCl with mass fraction 10.0% is molten Liquid adjusts pH value to 3~4, react obtain after 1h it is stand-by after the main adhesive of starch base.
- 2. according to a kind of preparation method of cassava oxidized starch adhesive of claim 1, it is characterised in that：Described starch is Tapioca；Described starch oxidation agent is sodium hypochlorite, postassium hypochlorite or hydrogen peroxide；Described initiator is ammonium persulfate； Described modifying agent is PVA.
- 3. according to a kind of preparation method of cassava oxidized starch adhesive of claim 1, it is characterised in that：In step 1)： Described starch oxidation agent is 3.0~5.0wt% of content of starch.
- 4. according to a kind of preparation method of cassava oxidized starch adhesive of claim 1, it is characterised in that：In step 3)： The mass ratio of the cassava oxidized starch and PVA is 5: 4~5: 8.
- A kind of 5. preparation method of cassava oxidized starch adhesive according to claim 1, it is characterised in that：Described draws Send out 0.2~0.5wt% that agent dosage is PVA dosages.
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| CN201610541932.6A CN107603513A (en) | 2016-07-12 | 2016-07-12 | A kind of method of cassava oxidized starch base adhesive |
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| CN201610541932.6A CN107603513A (en) | 2016-07-12 | 2016-07-12 | A kind of method of cassava oxidized starch base adhesive |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024955A (en) * | 2018-09-22 | 2018-12-18 | 芜湖市秋华保温材料有限责任公司 | A kind of rock wool belt composite plate |
| CN112376318A (en) * | 2020-11-18 | 2021-02-19 | 无锡海博源包装科技有限公司 | Anti-counterfeiting coating, anti-counterfeiting label printing process and anti-counterfeiting label |
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| CN101508876A (en) * | 2008-10-14 | 2009-08-19 | 长春工业大学 | Modified starch based adhesion agent for lumber and preparation method |
| CN103540278A (en) * | 2013-09-29 | 2014-01-29 | 安徽华印机电股份有限公司 | Preparation method of cassava starch biomass adhesive and application of adhesive |
| CN106221609A (en) * | 2016-08-29 | 2016-12-14 | 东北林业大学 | A kind of preparation method of cold curing tapioca gluing agent |
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2016
- 2016-07-12 CN CN201610541932.6A patent/CN107603513A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508876A (en) * | 2008-10-14 | 2009-08-19 | 长春工业大学 | Modified starch based adhesion agent for lumber and preparation method |
| CN103540278A (en) * | 2013-09-29 | 2014-01-29 | 安徽华印机电股份有限公司 | Preparation method of cassava starch biomass adhesive and application of adhesive |
| CN106221609A (en) * | 2016-08-29 | 2016-12-14 | 东北林业大学 | A kind of preparation method of cold curing tapioca gluing agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024955A (en) * | 2018-09-22 | 2018-12-18 | 芜湖市秋华保温材料有限责任公司 | A kind of rock wool belt composite plate |
| CN109024955B (en) * | 2018-09-22 | 2020-09-29 | 芜湖市秋华保温材料有限责任公司 | Rock wool area composite sheet |
| CN112376318A (en) * | 2020-11-18 | 2021-02-19 | 无锡海博源包装科技有限公司 | Anti-counterfeiting coating, anti-counterfeiting label printing process and anti-counterfeiting label |
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Application publication date: 20180119 |