CN102276976B - A kind of porous polyurethane-polyacrylic acid/acrylamide constant-humidity material - Google Patents
A kind of porous polyurethane-polyacrylic acid/acrylamide constant-humidity material Download PDFInfo
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- CN102276976B CN102276976B CN201110141151.5A CN201110141151A CN102276976B CN 102276976 B CN102276976 B CN 102276976B CN 201110141151 A CN201110141151 A CN 201110141151A CN 102276976 B CN102276976 B CN 102276976B
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- acrylamide
- polyacrylic acid
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- porous polymer
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Abstract
The object of this invention is to provide a kind of synthesizing formula and preparation technology of porous polymer constant humidity material. Given first the chemical formulation of polyacrylic acid/acid/acrylamide moisture-absorption modified resin and porous polymer constant humidity material, then introduced the preparation technology of polyacrylic acid/acrylamide resin, next has illustrated to foam prepares the process of cellular polyurethane-polyacrylic acid/acrylamide material. Cellular polyurethane-polyacrylic acid/acrylamide material after pre-moisture absorption, can change rapid moisture absorption or moisture releasing according to ambient humidity, ambient humidity raise or reduce, thereby maintaining ambient humidity substantially constant in confined space, and this material has good tensile property and rebound performance. The present invention combines shockproof cushioning performance and constant humidity performance, can be widely used in the buffering constant humidity storage package of weaponry and the product for civilian use.
Description
Technical field
The present invention relates to a kind of macromolecular material that has shock-absorbing capacity and constant humidity performance concurrently, belong to functional high polymer material field.
Background technology
Humidity is the main inducement that occurs failure phenomenon during weaponry stores, transports. If ambient humidity is controlled bad, can bring all adverse effects to weaponry. The harm of humidity be mainly by with the acting in conjunction of other environmental factor (as temperature, pernicious gas etc.), the various material production corrosion failures that Defence infrastructure and weaponry are used, this corrosion failure has the feature of generality, permanence. Such as, air humidity is too high, can form in metal surface the moisture film of condensed state, makes metal produce electrochemical corrosion; The Growth and reproduction of moist suitable mould and insect simultaneously, indirectly to material production destruction; The too low phenomenons such as high-molecular organic material cracking that easily cause of humidity. Even the equipment not too responsive to damp condition, if be long-term stored in the too high or too low environment of humidity, under the acting in conjunction of other environmental stress, also can occur corrosion phenomenon, particularly humidity by too high (low) to too low (height) harm while alternately changing even more serious. Therefore, how controlling wet is the problem of war storage packaging overriding concern.
For problem and integrated, the intelligentized requirements of multifunctional packaging such as my army's wet effect of weaponry packaging control are undesirable at present, use is inconvenient, if can make packaging material, as amortizing packaging material etc. has moisture absorption, moisture releasing function, particularly can be by constant in desirable humidity value ambient humidity in packaging, this is for a lot of weaponrys, and storage and the transport of the precision instrument especially to humidity sensitive, easily losing efficacy have great importance. Porous polymer constant humidity material combines shockproof cushioning performance and constant humidity performance effectively, for the preparation of shockproof cushioning constant humidity housing material is laid a good foundation; For the Shockproof anti-corrosion problem solving in my army's weaponry storage and transportation, improve the service life of my army's weaponry, guarantee that operational weapon equips all the time in good war preparedness serviceable condition, can carry out at any time combat duty, improve the quick supportability tool of modernized war logistics and be of great significance. In addition, this material is also expected to be used widely at storage, transport and other civil area of food, medicine etc.
Summary of the invention
The object of this invention is to provide a kind of formula and preparation technology of porous polymer constant humidity material.
The raw material of this porous polymer constant humidity material and proportioning (gram) be:
The raw material of this porous polymer constant humidity material high-hygroscopicity resin used and proportioning (gram) be:
The production of this porous polymer constant humidity material comprises two parts: the preparation of high-hygroscopicity resin particle and porous polymer material preparation.
High-hygroscopicity resin particle preparation technology is:
(1) by the water-soluble NaOH NaOH aqueous solution that is mixed with, be cooled to normal temperature.
(2) under magnetic agitation condition, with acrylic acid (AA) the solution titration NaOH aqueous solution.
(3) in mixed solution, add acrylamide (AM), continue to be stirred to AM and dissolve completely, then be placed in 70 DEG C of baking ovens and heat 1h.
(4) keeping temperature is 70 DEG C, in solution, adds quantitative crosslinking agent (N, N '-methylene-bisacrylamide) and initator (potassium peroxydisulfate) to carry out polymerization and cross-linking reaction 5h.
(5), after dry under 100 DEG C of conditions, pulverize, sieve and obtain the resin particle that particle diameter is 0.20～0.56mm.
Porous polymer material preparation technology is:
(1) take quantitative PPG 330N with beaker, add successively stannous octoate and triethylene diamine, foam stabiliser L580 and water, 1200r/min electric stirring 10min obtains mixed material.
(2) in mixed material, add rapidly quantitative TDI, stir 8-15s and obtain foaming prepolymer.
(3) in foaming prepolymer, add high-hygroscopicity resin particle, continue to stir after 8-12s, pour rapidly foaming in papery mould into.
(4) foam completely, then put it in 60 DEG C of baking ovens, slaking 48h, the cooling rear demoulding obtains product.
Main feature of the present invention:
1. the present invention has higher moisture absorption multiplying power and moisture releasing speed. Under 30 DEG C, 100%RH environment, moisture absorption multiplying power can reach 1.87g/g; After moisture absorption, under 30 DEG C, 20%RH environment, moisture releasing 35h can reach moisture releasing balance.
2. after the pre-moisture absorption certain hour of the present invention, be transferred to high humidity (or low humidity) environment moisture absorption rapidly of lower time (or moisture releasing), make ambient humidity decline rapidly (or raise). In the time that environment temperature is 30 DEG C, humidity exposure time is 0.5h～6h in advance, 20g constant humidity material can be by constant the relative humidity in 6L closed container certain value within the scope of 43%RH～59%RH.
3. under 25 DEG C～53 DEG C high low temperature alternation environment, 40g porous PU-PAA/AM constant humidity material can maintain the humidity in 6L closed container (50% ± 3%) RH.
4. the present invention has good hot strength, elongation at break and rebound performance. Hot strength can reach 180.01KPa, and elongation at break can reach 160%, and rebound degree can reach 33.70%. And there is reticulated, open structure.
5. the present invention is applied widely, both can be used as moisture-absorbing desiccant and has used, and also can be used for the buffering constant humidity storage package of various products.
Detailed description of the invention
Embodiment 1:
High-hygroscopicity resin particle preparation process is:
Take NaOH16.6g with electronic balance and be dissolved in 168ml water and be mixed with the NaOH aqueous solution, be cooled to normal temperature. Under magnetic agitation condition, with 31.5g acrylic acid (AA) the solution titration NaOH aqueous solution. In mixed solution, add 10.5g acrylamide (AM), continue to be stirred to AM and dissolve completely, then be placed in 70 DEG C of baking ovens and heat 1h. Keeping temperature is 70 DEG C, in solution, adds 0.02g crosslinking agent (N, N '-methylene-bisacrylamide) and 0.02g initator (potassium peroxydisulfate) reaction 5h. Temperature is adjusted to 100 DEG C and is dried, product is put into Universalpulverizer after dry to pulverize, sieving and obtaining particle diameter is that the resin particle of 0.20～0.56mm is stand-by.
Cellular polyurethane-polyacrylic acid/acrylamide material preparation process is:
Take 10g PPG 330N with beaker, add successively 0.07g stannous octoate, 0.08g triethylene diamine, 0.18g foam stabiliser L580 and 3.0g water, 1200r/min electric stirring 10min obtains mixed material. Add rapidly 6.5gTDI to mixed material, stir 10-15s and obtain foaming prepolymer. In foaming prepolymer, add 12g high-hygroscopicity resin particle, continue to stir after 9-12s, pour rapidly foaming in papery mould into. After foaming, then put it to slaking 48h in 60 DEG C of baking ovens, the cooling rear demoulding obtains product.
Embodiment 2:
High-hygroscopicity resin particle preparation process is:
Take 16.6gNaOH with electronic balance and be dissolved in 168ml water and be mixed with the NaOH aqueous solution, be cooled to normal temperature. Under magnetic agitation condition, with 31.5g acrylic acid (AA) the solution titration NaOH aqueous solution. In mixed solution, add 10.5g acrylamide (AM), continue to be stirred to AM and dissolve completely, then be placed in 70 DEG C of baking ovens and heat 1h. Keeping temperature is 70 DEG C, in solution, adds 0.04g crosslinking agent (N, N '-methylene-bisacrylamide) and 0.03g initator (potassium peroxydisulfate) reaction 5h. Temperature is adjusted to 100 DEG C and is dried, product is put into Universalpulverizer after dry to pulverize, sieving and obtaining particle diameter is that the resin particle of 0.20～0.56mm is stand-by.
Cellular polyurethane material preparation process is:
Take 10g PPG 330N with beaker, add successively 0.12g stannous octoate, 0.11g triethylene diamine, 0.22g foam stabiliser L580 and 3.5g water, 1200r/min electric stirring 10min obtains mixed material. Add rapidly 7.0gTDI to mixed material, stir 8-12s and obtain foaming prepolymer. In foaming prepolymer, add 9.0g high-hygroscopicity resin particle, continue to stir after 8-10s, pour rapidly foaming in papery mould into. After foaming, then put it to slaking 48h in 60 DEG C of baking ovens, the cooling rear demoulding obtains product.
Claims (4)
1. a porous polymer constant humidity material, is characterized in that: the raw material adopting consists of
The raw material of wherein said high-hygroscopicity resin particle consists of: acrylic acid 30-35 gram, acrylamide 9-12 gram,Potassium peroxydisulfate 0.02-0.03 gram, N, 0.02-0.04 gram of N '-methylene-bisacrylamide, water 160-200 gram,NaOH 16-18 gram.
2. porous polymer constant humidity material according to claim 1, is characterized in that: its preparation technology comprisesThe preparation of high-hygroscopicity resin particle and the preparation of cellular polyurethane-polyacrylic acid/acrylamide material.
3. porous polymer constant humidity material according to claim 2, is characterized in that: described cellular polyurethane-polyacrylic acid/acrylamide material preparation process is:
(1) take quantitative PPG 330N with beaker, add successively stannous octoate and triethylene twoAmine, foam stabiliser L580 and water, 1200r/min electric stirring 10min obtains mixed material;
(2) in mixed material, add quantitative TDI, stir 8-15s and obtain foaming prepolymer;
(3) in foaming prepolymer, add high-hygroscopicity resin particle rapidly, stir after 8-12s, fall rapidlyEnter foaming in papery mould;
(4) after foaming, then put it to slaking 48h in 60 DEG C of baking ovens, the cooling rear demoulding obtains product.
4. according to the porous polymer constant humidity material described in claim 2 or 3, it is characterized in that: cellular polyurethaneAfter the pre-moisture absorption of-polyacrylic acid/acrylamide material, can maintain confined space ambient humidity constant; Hot strength can reach180.01KPa, elongation at break can reach 160%, and rebound degree can reach 33.70%, and has reticulated, open knotStructure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110141151.5A CN102276976B (en) | 2011-05-27 | 2011-05-27 | A kind of porous polyurethane-polyacrylic acid/acrylamide constant-humidity material |
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| CN201110141151.5A CN102276976B (en) | 2011-05-27 | 2011-05-27 | A kind of porous polyurethane-polyacrylic acid/acrylamide constant-humidity material |
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| CN102276976A CN102276976A (en) | 2011-12-14 |
| CN102276976B true CN102276976B (en) | 2016-05-25 |
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| CN106893551A (en) * | 2015-12-17 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of liquid sealing material and its preparation and application |
| CN106750499A (en) * | 2016-11-22 | 2017-05-31 | 俞潮军 | A kind of micropore large surface material for volatile organic contaminant absorption |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003046B (en) * | 1984-10-17 | 1989-01-11 | 日本触媒化学工业株式会社 | Water-absorbing agent |
| CN1357015A (en) * | 1999-04-21 | 2002-07-03 | Ppg工业油漆股份有限公司 | Polymer |
| CN1408736A (en) * | 2001-09-24 | 2003-04-09 | 中国科学院过程工程研究所 | Process for preparing multifunctional poly propenoic acid/salts long acting water-keeping material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003046B (en) * | 1984-10-17 | 1989-01-11 | 日本触媒化学工业株式会社 | Water-absorbing agent |
| CN1357015A (en) * | 1999-04-21 | 2002-07-03 | Ppg工业油漆股份有限公司 | Polymer |
| CN1408736A (en) * | 2001-09-24 | 2003-04-09 | 中国科学院过程工程研究所 | Process for preparing multifunctional poly propenoic acid/salts long acting water-keeping material |
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