CN104974683A - Preparation method of konjak powder-chitosan-PVA mixed binder - Google Patents
Preparation method of konjak powder-chitosan-PVA mixed binder Download PDFInfo
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- CN104974683A CN104974683A CN201510323953.6A CN201510323953A CN104974683A CN 104974683 A CN104974683 A CN 104974683A CN 201510323953 A CN201510323953 A CN 201510323953A CN 104974683 A CN104974683 A CN 104974683A
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Abstract
The invention discloses a preparation method of a konjak powder-chitosan-PVA mixed binder and relates to the technical field of binder preparation. The preparation method comprises 1, preparing a PVA solution with a mass fraction of 10%, 2, carrying out blending polymerization on konjak powder and chitosan in the solution, and 3, adding the PVA solution and a cross-linking agent chloropropylene oxide solution into the blended polymer and carrying out stirring at a temperature of 60-70 DEG C for 1.5-2h to obtain the mixed binder. The konjak powder-chitosan-PVA mixed binder has the advantages of high bonding strength, good water resistance and good stability, can be widely used in the fields of timber assembling and wood-based plate processing and can also be used in the field of water resistance and packaging.
Description
Technical field
The present invention relates to chemical field, the preparation method of especially a kind of Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick.
Background technology
In the wood adhesive used at present, many is three-aldehyde glue---the urea-formaldehyde resin (UF) of solvent based, resol (PF) and terpolycyantoamino-formaldehyde resin (VIF), this " three-aldehyde glue " is except poor water resistance, shelf lives are short, a large amount of formaldehyde is discharged in the process of producing and use, environmental pollution causes very large impact, and mankind's Long Term Contact also can cause the danger of suffering from the diseases such as respiratory tract disease, malignant tumour, leukemia.Along with the proposition of environmental protection and the theory such as energy-conservation, higher requirement be it is also proposed to timber industry glue, this just requires to reduce formaldehyde monomers and consumption, tackiness agent Free Aldehyde content is made to reach minimum standard, or seek suitable raw material and fill a prescription to replace " three aldehyde " glue, thoroughly solve free aldehyde and discharge the environmental problem brought.
Natural adhesive raw material sources are extensive, and cost is low, easy to use, asepsis environment-protecting, along with petroleum-based energy is nervous and the going deep into of tackiness agent theoretical investigation, the more important thing is the enhancing of people's environmental consciousness, natural adhesive comes into one's own again, to giving full play to its natural environmental-protective and reproducible advantage.
Rhizoma amorphophalli glucomannan is the one deposit property polysaccharide extracted in Araeceae konjac tuber, and be a kind of renewable natural polymer child resource, its wide material sources, have biodegradability, and water-sol viscosity is high, can thickening, gel and film forming.Chitosan (chitosan, CA) is the biomacromolecule that chitin (Chitin) deacetylation is transformed, and is also the unique natural alkaline polysaccharide of occurring in nature.Containing abundant hydroxyl and amino in chitosan molecule structure, make it to be easy to carry out chemically modified and modification, its Application Areas widely.In recent years, chitosan is widely used in the industries such as medicine, food, chemical industry, environmental protection.A series of derivatives that chitosan is generated by modification all have very strong wetting ability, can degrade by biology, be nontoxic, the free of contamination macromolecular material of a class.Polyvinyl alcohol (polyvinyl alcohol, PVA) be the white powder water-soluble polymer resin being hydrolyzed by Vinyl Acetate Copolymer and obtaining, nontoxic, cheap, good film-forming property and generate glued membrane intensity high, be applicable to bonding paper, fabric and timber etc.PVA can also use as the auxiliary agent of many sizing agents, can improve gluing power and wet fastness.
But Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick cohesive strength that research is obtained is at present good not, constrains its development.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, provides that a kind of Joint strength is high, the preparation method of the Rhizoma amorphophalli powder of water-tolerant-chitosan-PVA Blend rubber stick.
A preparation method for Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick, is characterized in that comprising the following steps:
(1) preparing massfraction is 10%PVA solution;
(2) 40-60 part Rhizoma amorphophalli powder and 200-300 part deionized water is added in a reservoir, be warming up to 65-75 DEG C, be be stirred into konjaku solution under the agitation condition of 200-220r/min at rotating speed, 40-60 part chitosan is added in konjaku solution, continuous stirring makes chitosan dissolving or fully swelling, adjusted to ph is in the scope of 4 ~ 6, and the initiator adding 2-3 weight part stirs 30-40min and obtains polymer blend;
(3) in polymer blend, adding 30-40 part mass concentration is the PVA solution of 10%, and 10-20 weight part mass concentration is the epoxy chloropropane solution of 4%, stirs 1.5-2h obtain Blend rubber stick at 60-70 DEG C; Then by the NaOH solution of 30%, the pH value of glue is adjusted to 6 ~ 7, after being warming up to 85 DEG C of continuation reaction 5min, cooling discharge, namely obtains sizing agent after standing and defoaming.
Further, the preparation method of described 10%PVA solution is: by PVA and pure water 1:9 swelling 5 ~ 10min at normal temperatures in mass ratio, then DEG C constant temperature of the solution warms to 90 after swelling is kept 20 ~ 30min, after making it to dissolve completely, be cooled to 25 DEG C again to seal, namely make the PVA solution that massfraction is 10%.
Further, the polymerization degree >=1700 of PVA of the present invention, alcoholysis degree is 97%.
Further, described initiator to be mass concentration be 10% ammonium persulphate or potassium persulfate solution.
Owing to have employed technique scheme, the invention has the beneficial effects as follows: linking agent made by the preferred epoxy chloropropane of the present invention, epoxy chloropropane is a kind of ring-type oxygenatedchemicals, easily and graft starch molecule generation crosslinking reaction, make to be bonded to each other between chemical bond and form one cancellated high polymers seemingly, and make cross-linking set segment have better ductility, flexibility, therefore its mechanical property is better, and due to epoxy chloropropane crosslinking reaction mild condition, be easy to control, its chemical stability is high, gained cross-linking products is antiacid, alkali, the stability of anti-shearing effect is higher.Preparation technology of the present invention is by preferred copolymerization units, initiator, control the temperature condition of reaction, the more existing sizing agent of gained sizing agent, not containing organic volatile, pollute little more environmental protection, cohesive strength is stronger, and water resistance is higher, and production cost is low simultaneously, being easy to scale operation, is the sizing agent that nontoxic pollution is few.
Embodiment
By the following examples, the invention will be further described:
Embodiment 1
A preparation method for Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick, comprises the following steps:
(1) preparing massfraction is 10%PVA solution: by PVA and pure water 1:9 swelling 5min at normal temperatures in mass ratio, then DEG C constant temperature of the solution warms to 90 after swelling is kept 20min, after making it to dissolve completely, be cooled to 25 DEG C again to seal, namely make the PVA solution that massfraction is 10%; Wherein, the polymerization degree >=1700 of selected PVA, alcoholysis degree is 97%.
(2) 40 portions of Rhizoma amorphophalli powders and 300 parts of deionized waters are added in a reservoir, be warming up to 65 DEG C, be be stirred into konjaku solution under the agitation condition of 200r/min at rotating speed, 40 parts of chitosans are added in konjaku solution, continuous stirring makes chitosan dissolving or fully swelling, adjusted to ph is 4, and the initiator adding 2 weight parts stirs 30min and obtains polymer blend; Initiator used to be mass concentration be 10% ammonium persulfate solution;
(3) in polymer blend, adding 40 parts of mass concentrations is the PVA solution of 10%, and 20 weight part mass concentrations are the epoxy chloropropane solution of 4%, stirs 1.5h obtain Blend rubber stick at 70 DEG C; Then by the NaOH solution of 30%, the pH value of glue is adjusted to 6, after being warming up to 85 DEG C of continuation reaction 5min, cooling discharge, namely obtains sizing agent after standing and defoaming.
Embodiment 2
A preparation method for Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick, comprises the following steps:
(1) preparing massfraction is 10%PVA solution: by PVA and pure water 1:9 swelling 10min at normal temperatures in mass ratio, then DEG C constant temperature of the solution warms to 90 after swelling is kept 30min, after making it to dissolve completely, be cooled to 25 DEG C again to seal, namely make the PVA solution that massfraction is 10%; Wherein, the polymerization degree >=1700 of selected PVA, alcoholysis degree is 97%;
(2) 60 portions of Rhizoma amorphophalli powders and 200 parts of deionized waters are added in a reservoir, be warming up to 75 DEG C, be be stirred into konjaku solution under the agitation condition of 220r/min at rotating speed, 60 parts of chitosans are added in konjaku solution, continuous stirring makes chitosan dissolving or fully swelling, adjusted to ph is 6, and the initiator adding 3 weight parts stirs 40min and obtains polymer blend; Initiator used to be mass concentration be 10% ammonium persulfate solution;
(3) in polymer blend, adding 30 parts of mass concentrations is the PVA solution of 10%, and 10 weight part mass concentrations are the epoxy chloropropane solution of 4%, stirs 2h obtain Blend rubber stick at 60 DEG C; Then by the NaOH solution of 30%, the pH value of glue is adjusted to 7, after being warming up to 85 DEG C of continuation reaction 5min, cooling discharge, namely obtains sizing agent after standing and defoaming.
Embodiment 3
A preparation method for Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick, comprises the following steps:
(1) preparing massfraction is 10%PVA solution: by PVA and pure water 1:9 swelling 8min at normal temperatures in mass ratio, then DEG C constant temperature of the solution warms to 90 after swelling is kept 25min, after making it to dissolve completely, be cooled to 25 DEG C again to seal, namely make the PVA solution that massfraction is 10%; Wherein, the polymerization degree >=1700 of selected PVA, alcoholysis degree is 97%.
(2) 50 portions of Rhizoma amorphophalli powders and 250 parts of deionized waters are added in a reservoir, be warming up to 70 DEG C, be be stirred into konjaku solution under the agitation condition of 210r/min at rotating speed, 50 parts of chitosans are added in konjaku solution, continuous stirring makes chitosan dissolving or fully swelling, adjusted to ph is 5, and the initiator adding 2-3 weight part stirs 35min and obtains polymer blend; Initiator used to be mass concentration be 10% ammonium persulphate or potassium persulfate solution;
(3) in polymer blend, adding 35 parts of mass concentrations is the PVA solution of 10%, and 15 weight part mass concentrations are the epoxy chloropropane solution of 4%, stirs 2h obtain Blend rubber stick at 65 DEG C; Then by the NaOH solution of 30%, the pH value of glue is adjusted to 6.5, after being warming up to 85 DEG C of continuation reaction 5min, cooling discharge, namely obtains sizing agent after standing and defoaming.
Embodiment 3 performance test
Do following testing performance index to the tackiness agent obtained by embodiment 1,2 or 3, its test result is as shown in table 1 below:
| Index | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Shearing resistance/MPa | 28 | 30 | 31 |
| Tensile strength/MPa | 26 | 27 | 27 |
| Stripping strength/MPa | 46 | 50 | 48 |
As can be seen from test result, the Blend rubber stick cohesive strength obtained by the present invention is large, and various aspects of performance can meet the use standard of wood adhesive, can, wood-based plate manufacture field use assembled at timber.
Claims (4)
1. a preparation method for Rhizoma amorphophalli powder-chitosan-PVA Blend rubber stick, is characterized in that comprising the following steps:
(1) preparing massfraction is 10%PVA solution;
(2) 40-60 part Rhizoma amorphophalli powder and 200-300 part deionized water is added in a reservoir, be warming up to 65-75 DEG C, be be stirred into konjaku solution under the agitation condition of 200-220r/min at rotating speed, 40-60 part chitosan is added in konjaku solution, continuous stirring makes chitosan dissolving or fully swelling, adjusted to ph is in the scope of 4 ~ 6, and the initiator adding 2-3 weight part stirs 30-40min and obtains polymer blend;
(3) in polymer blend, adding 30-40 part mass concentration is the PVA solution of 10%, and 10-20 weight part mass concentration is the epoxy chloropropane solution of 4%, stirs 1.5-2h obtain Blend rubber stick at 60-70 DEG C; Then by the NaOH solution of 30%, the pH value of glue is adjusted to 6 ~ 7, after being warming up to 85 DEG C of continuation reaction 5min, cooling discharge, namely obtains sizing agent after standing and defoaming.
2. the preparation method of a kind of Rhizoma amorphophalli powder according to claim 1-chitosan-PVA Blend rubber stick, it is characterized in that the preparation method of described 10%PVA solution is: by PVA and pure water 1:9 swelling 5 ~ 10min at normal temperatures in mass ratio, then DEG C constant temperature of the solution warms to 90 after swelling is kept 20 ~ 30min, after making it to dissolve completely, be cooled to 25 DEG C again to seal, namely make the PVA solution that massfraction is 10%.
3. the preparation method of a kind of Rhizoma amorphophalli powder according to claim 1 and 2-chitosan-PVA Blend rubber stick, it is characterized in that: the polymerization degree >=1700 of described PVA, alcoholysis degree is 97%.
4. the preparation method of a kind of Rhizoma amorphophalli powder according to claim 1 and 2-chitosan-PVA Blend rubber stick, is characterized in that: described initiator to be mass concentration be 10% ammonium persulphate or potassium persulfate solution.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106047222A (en) * | 2016-06-15 | 2016-10-26 | 安徽扬帆充气游乐设备制造有限公司 | High adhesive strength adhesive for inflatable boat |
| CN106047221A (en) * | 2016-06-15 | 2016-10-26 | 安徽扬帆充气游乐设备制造有限公司 | Adhesive with excellent adhesive property for inflatable boats |
| CN106118551A (en) * | 2016-06-26 | 2016-11-16 | 欧振云 | A kind of forest-friendly building timbers adhesive |
| CN106566440A (en) * | 2016-10-28 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Composite modified environment-friendly metal corrugated pipe adhesive and preparation method thereof |
| CN107400477A (en) * | 2016-05-19 | 2017-11-28 | 长沙市汇华胶粘剂科技有限公司 | A kind of preparation method of konjac glucomannan-polyvinyl alcohol-dipotassium hydrogen phosphate blending green environment protection adhesion agent |
| CN107446523A (en) * | 2017-08-30 | 2017-12-08 | 含山县茂盛胶合板厂 | A kind of glued board adhesive |
| CN107828284A (en) * | 2017-10-24 | 2018-03-23 | 沈阳顺风新材料有限公司 | A kind of interfacial agents and preparation method thereof |
| CN107903847A (en) * | 2017-11-20 | 2018-04-13 | 苏州甫众塑胶有限公司 | A kind of compound wooden case adhesive and preparation method thereof |
| CN110037293A (en) * | 2019-04-02 | 2019-07-23 | 安徽雁飞粮油有限责任公司 | A kind of wheat compound nutritional particle and preparation method thereof |
| CN117599753A (en) * | 2023-12-29 | 2024-02-27 | 广东微方程新材料有限公司 | Adsorption material based on molecular sieve and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107400477A (en) * | 2016-05-19 | 2017-11-28 | 长沙市汇华胶粘剂科技有限公司 | A kind of preparation method of konjac glucomannan-polyvinyl alcohol-dipotassium hydrogen phosphate blending green environment protection adhesion agent |
| CN106047222A (en) * | 2016-06-15 | 2016-10-26 | 安徽扬帆充气游乐设备制造有限公司 | High adhesive strength adhesive for inflatable boat |
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| CN106118551A (en) * | 2016-06-26 | 2016-11-16 | 欧振云 | A kind of forest-friendly building timbers adhesive |
| CN106566440A (en) * | 2016-10-28 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Composite modified environment-friendly metal corrugated pipe adhesive and preparation method thereof |
| CN107446523A (en) * | 2017-08-30 | 2017-12-08 | 含山县茂盛胶合板厂 | A kind of glued board adhesive |
| CN107828284A (en) * | 2017-10-24 | 2018-03-23 | 沈阳顺风新材料有限公司 | A kind of interfacial agents and preparation method thereof |
| CN107903847A (en) * | 2017-11-20 | 2018-04-13 | 苏州甫众塑胶有限公司 | A kind of compound wooden case adhesive and preparation method thereof |
| CN110037293A (en) * | 2019-04-02 | 2019-07-23 | 安徽雁飞粮油有限责任公司 | A kind of wheat compound nutritional particle and preparation method thereof |
| CN117599753A (en) * | 2023-12-29 | 2024-02-27 | 广东微方程新材料有限公司 | Adsorption material based on molecular sieve and preparation method thereof |
| CN117599753B (en) * | 2023-12-29 | 2024-05-24 | 广东微方程新材料有限公司 | Adsorption material based on molecular sieve and preparation method thereof |
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Effective date of registration: 20180914 Address after: 221300 Sheng Qiang Road, New River Town, Pizhou, Jiangsu Applicant after: Pizhou Jinfeng wood fiber powder Co., Ltd. Address before: 530004 100 East University Road, Nanning, the Guangxi Zhuang Autonomous Region Applicant before: Guangxi University |
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Address after: 221300 Sheng Qiang Road, New River Town, Pizhou, Jiangsu Patentee after: Jiangsu jinyufeng New Material Co., Ltd Address before: 221300 Sheng Qiang Road, New River Town, Pizhou, Jiangsu Patentee before: PIZHOU JINFENG WOOD FIBER POWDER Co.,Ltd. |
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Denomination of invention: Preparation method of konjac powder chitosan PVA blend adhesive Effective date of registration: 20210809 Granted publication date: 20181026 Pledgee: China Construction Bank Corporation Pizhou sub branch Pledgor: Jiangsu jinyufeng New Material Co.,Ltd. Registration number: Y2021980007390 |