CN105524404A - Preparation method for liquefied bamboo-based phenolic foamed plastic - Google Patents
Preparation method for liquefied bamboo-based phenolic foamed plastic Download PDFInfo
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- CN105524404A CN105524404A CN201510763664.8A CN201510763664A CN105524404A CN 105524404 A CN105524404 A CN 105524404A CN 201510763664 A CN201510763664 A CN 201510763664A CN 105524404 A CN105524404 A CN 105524404A
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Abstract
The invention provides a preparation method for a liquefied bamboo-based phenolic foamed plastic, belonging to the field of plastic processing technology. The preparation method is characterized by comprising the following steps: adding a liquefied substance of bamboo wood, paraformaldehyde and sodium hydroxide into a flask, carrying out heating and a reaction and then carrying out discharging, wherein the resinification time of PBF is 2 h, the resinification temperature of NaOH and a phenol substance is 70 DEG C and the resinification time of PF is 2 h; and putting PBF into the beaker, adding bamboo powder, a surfactant and a foaming agent, i.e., isopropyl ether, carrying out rapid stirring, then adding a curing agent, i.e., an aqueous phosphoric acid solution, carrying out stirring until milky foam bulk appears, rapidly pouring the foam bulk into a stainless steel cup for foaming, and carrying out curing and cooling. Through improvement of original preparation technology for the foamed plastic and usage of sodium hydroxide as a catalyst, the prepared thermosetting material has degradability and effectively reduced environmental pollution; moreover, generation and preparation cost is effectively reduced; and the preparation method is simple, easy to operate and suitable for large-scale promotion and application.
Description
Technical field
The invention belongs to plastic processing field, particularly relate to a kind of preparation method of the bamboo base phenolic foamed plastics that liquefies.
Background technology
In recent years along with the fast development of science and technology, increasing material preparation technology is upgraded.In the face of the exhaustion day by day of some nonrenewable resourceses, develop the focus that biomass resource has become various countries researchist research.Bamboo is the important component part of biomass resource, especially very extensive in the distribution of south China each province.In recent years along with the further rise of bamboo product secondary industry, various bamboo processing tankage increased, and be mostly used as fuel, utility value is low, and contaminate environment.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of preparation method of the bamboo base phenolic foamed plastics that liquefies.
Liquefy the preparation method of bamboo base phenolic foamed plastics, it is characterized in that comprising the steps:
(1) be that 1:1.6:0.4 adds in flask by bamboo liquefied substance, paraformaldehyde and sodium hydroxide by the ratio of amount of substance, be heated to 80 DEG C of reactions, discharging after reaction 2h;
(2) the resinifying time of PBF is 2h, and formaldehyde and the ratio of phenol amount of substance are 1.2, NaOH is 0.6 with the ratio of phenol amount of substance, and resinifying temperature is 70 DEG C;
(3) the resinifying temperature of PF is 90 DEG C, and the resinifying time is 2h, and formaldehyde and the ratio of phenol amount of substance are 1.2, NaOH is 0.6 with the ratio of phenol amount of substance;
(4) PBF100g is taken in the beaker of 250mL, add 2 ~ 6g bamboo powder, 2 ~ 8g tensio-active agent Tu Wen – 80 and 4 ~ 8g whipping agent isopropyl ether, 8 ~ 16g solidifying agent phosphate aqueous solution is added after rapid stirring 1min, continue rapid stirring to occur to there being oyster white foam, pour in stainless steel cup rapidly and foam, solidification cooling.
The preparation method of a kind of bamboo base phenolic foamed plastics that liquefies of the present invention, is characterized in that described in step (1), flask is the four-hole boiling flask of 1000ml, and is provided with agitator, thermometer, prolong.
The preparation method of a kind of bamboo base phenolic foamed plastics that liquefies of the present invention, is characterized in that the massfraction of phosphate aqueous solution described in step (4) is 85%.
The preparation method of a kind of bamboo base phenolic foamed plastics that liquefies of the present invention, is characterized in that the diameter of stainless steel cup described in step (4) is 10cm.
The preparation method of a kind of bamboo base phenolic foamed plastics that liquefies of the present invention, is characterized in that described in step (4), set time is 30min.
The preparation method of a kind of bamboo base phenolic foamed plastics that liquefies of the present invention, by the improvement to original porous plastics preparation technology, with sodium hydroxide as catalyzer, made one-tenth thermosetting material, has degradability, and the pollution for environment effectively reduces, effectively demote simultaneously and generated the cost prepared, and preparation technology is simple, easy handling, is suitable for large range promotion use.
Embodiment
Liquefy the preparation method of bamboo base phenolic foamed plastics, it is characterized in that comprising the steps:
(1) be that 1:1.6:0.4 adds in flask by bamboo liquefied substance, paraformaldehyde and sodium hydroxide by the ratio of amount of substance, be heated to 80 DEG C of reactions, discharging after reaction 2h;
(2) the resinifying time of PBF is 2h, and formaldehyde and the ratio of phenol amount of substance are 1.2, NaOH is 0.6 with the ratio of phenol amount of substance, and resinifying temperature is 70 DEG C;
(3) the resinifying temperature of PF is 90 DEG C, and the resinifying time is 2h, and formaldehyde and the ratio of phenol amount of substance are 1.2, NaOH is 0.6 with the ratio of phenol amount of substance;
(4) PBF100g is taken in the beaker of 250mL, add 2 ~ 6g bamboo powder, 2 ~ 8g tensio-active agent Tu Wen – 80 and 4 ~ 8g whipping agent isopropyl ether, 8 ~ 16g solidifying agent phosphate aqueous solution is added after rapid stirring 1min, continue rapid stirring to occur to there being oyster white foam, pour in stainless steel cup rapidly and foam, solidification cooling.
The preparation method of a kind of bamboo base phenolic foamed plastics that liquefies of the present invention, described in step (1), flask is the four-hole boiling flask of 1000ml, and is provided with agitator, thermometer, prolong.Described in step (4), the massfraction of phosphate aqueous solution is 85%.Described in step (4), the diameter of stainless steel cup is 10cm.Set time described in step (4) is 30min.Bamboo wood Liquefaction Products in Phenol thing (Mierocrystalline cellulose, hemicellulose, lignin degradation after product) itself is have higher molecular weight and the mixture of complex chemical composition.BF resin has higher dispersity.Because the viscosity of PBF is far above caused by conventional PF, viscosity is high may also be the reason causing PBFM compressive strength large., along with the rising of solidification value, its solidification endotherm(ic)peak weakens gradually, during to 200 DEG C, almost without endotherm(ic)peak, shows that solidification is complete.1st stage is mainly before 400 DEG C, the isopropyl ether whipping agent contained in the oxidation Sum decomposition of the methylol, ehter bond and the carbonyl that are cross-linked further, have neither part nor lot in curing cross-linked of resin and porous plastics system, tell caused by the volatile constituent volatilizations such as warm – 80 tensio-active agent, and the 2nd stage thermal weight loss is mainly in 400 ~ 750 DEG C, the decomposition of part aromatic ring and carbonization are the principal reactions in the 2nd stage.Improve the thermostability that solidification value can increase PBFM effectively, thus improve the thermotolerance of PBFM.Illustrate that the thermostability of foams solidification value to porous plastics has considerable influence, illustrate that suitably improving PBFM solidification value can improve its thermotolerance.
Claims (5)
1. liquefy the preparation method of bamboo base phenolic foamed plastics, it is characterized in that comprising the steps:
(1) be that 1:1.6:0.4 adds in flask by bamboo liquefied substance, paraformaldehyde and sodium hydroxide by the ratio of amount of substance, be heated to 80 DEG C of reactions, discharging after reaction 2h;
(2) the resinifying time of PBF is 2h, and formaldehyde and the ratio of phenol amount of substance are 1.2, NaOH is 0.6 with the ratio of phenol amount of substance, and resinifying temperature is 70 DEG C;
(3) the resinifying temperature of PF is 90 DEG C, and the resinifying time is 2h, and formaldehyde and the ratio of phenol amount of substance are 1.2, NaOH is 0.6 with the ratio of phenol amount of substance;
(4) PBF100g is taken in the beaker of 250mL, add 2 ~ 6g bamboo powder, 2 ~ 8g tensio-active agent Tu Wen – 80 and 4 ~ 8g whipping agent isopropyl ether, 8 ~ 16g solidifying agent phosphate aqueous solution is added after rapid stirring 1min, continue rapid stirring to occur to there being oyster white foam, pour in stainless steel cup rapidly and foam, solidification cooling.
2. the preparation method of a kind of bamboo base phenolic foamed plastics that liquefies as claimed in claim 1, is characterized in that described in step (1), flask is the four-hole boiling flask of 1000ml, and is provided with agitator, thermometer, prolong.
3. the preparation method of a kind of bamboo base phenolic foamed plastics that liquefies as claimed in claim 1, is characterized in that the massfraction of phosphate aqueous solution described in step (4) is 85%.
4. the preparation method of a kind of bamboo base phenolic foamed plastics that liquefies as claimed in claim 1, is characterized in that the diameter of stainless steel cup described in step (4) is 10cm.
5. the preparation method of a kind of bamboo base phenolic foamed plastics that liquefies as claimed in claim 1, is characterized in that described in step (4), set time is 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510763664.8A CN105524404A (en) | 2015-11-11 | 2015-11-11 | Preparation method for liquefied bamboo-based phenolic foamed plastic |
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| CN201510763664.8A CN105524404A (en) | 2015-11-11 | 2015-11-11 | Preparation method for liquefied bamboo-based phenolic foamed plastic |
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| CN105524404A true CN105524404A (en) | 2016-04-27 |
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| CN201510763664.8A Pending CN105524404A (en) | 2015-11-11 | 2015-11-11 | Preparation method for liquefied bamboo-based phenolic foamed plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114736420A (en) * | 2022-06-15 | 2022-07-12 | 常熟东南塑料有限公司 | Modified phenolic resin foam and preparation method thereof |
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2015
- 2015-11-11 CN CN201510763664.8A patent/CN105524404A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114736420A (en) * | 2022-06-15 | 2022-07-12 | 常熟东南塑料有限公司 | Modified phenolic resin foam and preparation method thereof |
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Application publication date: 20160427 |
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