CN104892877A - Phenolated lignin modified expandable resorcinol-phenol-formaldehyde resin and preparation method thereof - Google Patents
Phenolated lignin modified expandable resorcinol-phenol-formaldehyde resin and preparation method thereof Download PDFInfo
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Abstract
The invention discloses modified expandable resorcinol-phenol-formaldehyde resin and a preparation method thereof. The preparation method comprises the following steps: adding lignin, phenol and a basic catalyst into a reactor for phenolate and degradation of lignin; adding a formaldehyde solution for condensation reaction with phenolated lignin and phenol; adding paraformaldehyde for further condensation reaction with the basic catalyst; adding resorcinol for condensation polymerization, so as to obtain the phenolated lignin modified expandable resorcinol-phenol-formaldehyde resin. As phenolate and degradation of lignin are carried out in advance, the phenolic hydroxyl group content of lignin is improved. Moreover, high-activity resorcinol is added, so that the prepared lignin-based phenolic resin is high in activity; a foam material made of the modified resin through solidification is high in mechanical properties, and low in scaling off rate. The compression strength of lignin modified phenolic foam is 172.1 kPa, and the bending strength of lignin modified phenolic foam is 254.6 kPa, which are respectively 10.5 percent and 22.1 percent higher than those of foam which is not added with lignin; the scaling off rate of the lignin modified phenolic foam is 19.1 percent, which is 22.8 percent lower than that of the form which is not added with lignin.
Description
Technical field
The present invention relates to the preparation method of lignin modification resol, specifically phenolate lignin degrading under alkaline condition, then utilize the lignin modification resorcinol phenol formaldehyde resin that phenolate is degraded, prepare light-weight environment-friendly insulating foam.
Background technology
China's forest tree remainder resource output is large, economic worth is high, but lower to its utilization ratio at present, how to make full use of biomass resource and prepares the key content that biomass-based composite material is research at present.Liginon Resource is one of important sources of biomass resource, xylogen is the aromaticity superpolymer containing oxo phenylpropyl alcohol or derivatives thereof structural unit, a large amount of hydroxyls is there is in structural unit, can Substitute For Partial phenol as the synthesis material preparing resol, can reduce the dependence to fossil feedstock like this, the Quan Zhihua simultaneously achieving biomass resource utilizes.At present, be that raw material is prepared foam material by chemical modification means such as polymerization, grafting and mainly concentrated on polyurethane foam with xylogen, the application of xylogen in resol is less.ZL 201210441520.7 provides a kind of preparation method utilizing tree bark powder to prepare Phenolic resin wood adhesive, this invention activates under tree bark powder alkaline condition, then based Wood Adhesives is prepared with formaldehyde solution, urea reaction, do not need tree bark powder through extracting and pre-treatment, the Quan Zhihua achieving low-cost bio raw material uses, and preparation technology is simple possible more.ZL 201010252819.9 provides and utilizes the thick enzymolysis xylogen of by product of maize straw fermenting and preparing biological butyl alcohol, saccharan product to prepare expandable phenolic resin, but not to xylogen pre-treatment, only have minority xylogen to take part in reaction, the phenol resin active of preparation is lower.By infrared spectrum, the present invention, to xylogen phenolate degraded pre-treatment, finds out that the lignin phenol's hydroxyl after process increases really, so phenolate xylogen can prepare expandable phenolic resin by Substitute For Partial phenol.In addition, the present invention adds a small amount of high reactivity Resorcinol, improves the activity of resol, and the lignin-modified phenolic foam mechanical property of preparation is good, falls slag rate few.
Summary of the invention
The technical problem solved is the shortcomings such as xylogen activity is low, the high and foamy body of lignin phenol formaldehyde resin free formaldehyde of preparation is low in order to solve, the invention provides the method for modifying of phenolate lignin modification resorcinol phenol formaldehyde resin, specifically by phenolate degradation treatment under xylogen alkaline condition, then react with paraformaldehyde condensation polymerization.
The preparation method of a kind of phenolate lignin modification of technical scheme expandability resorcinol phenol formaldehyde resin, is characterized in that, by mass parts, consisting of:
The preparation method of described phenolate lignin modification expandability resorcinol phenol formaldehyde resin, is characterized in that comprising the following steps:
The first step, xylogen phenolate degradation treatment: 4 ~ 20 parts of xylogen, 12 ~ 34 parts of phenol, 0.8 ~ 5.6 part of basic catalyst are added in reactor, is warming up to 85 ~ 100 DEG C, reaction 60 ~ 240min;
Second step, is cooled to 75 ~ 95 DEG C, adds 4 ~ 32 parts of formaldehyde solutions, carries out condensation polymerization reaction 10 ~ 40min;
3rd step, divides and adds 7 ~ 24 parts of paraformaldehydes for six times, and divide and add remaining basic catalyst 75 ~ 95 DEG C reaction 60 ~ 100min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical;
4th step, is cooled to 50 ~ 80 DEG C, adds 2 ~ 8 parts of resorcin reaction 20 ~ 100min.
The preparation method of described phenolate lignin modification expandability resorcinol phenol formaldehyde resin, is characterized in that, described xylogen is any one in enzymolysis xylogen, sodium lignosulfonate, calcium lignin sulphonate or alkali lignin.
The preparation method of described phenolate lignin modification expandability resorcinol phenol formaldehyde resin, it is characterized in that, described formaldehyde solution percentage composition is 37%.
The preparation method of described phenolate lignin modification expandability resorcinol phenol formaldehyde resin, it is characterized in that, described paraformaldehyde is the industrial goods of 95%, and the polymerization degree is 8 ~ 12.
The preparation method of described phenolate lignin modification expandability resorcinol phenol formaldehyde resin, is characterized in that, described basic catalyst is any one in the sodium hydroxide of mass concentration 50%, potassium hydroxide or hydrated barta.
The preparation method of described phenolate lignin modification expandability resorcinol phenol formaldehyde resin, is characterized in that, the lignin modification expandability resorcinol phenol formaldehyde resin solids content of described preparation is 70% ~ 85%.
Beneficial effect
1. the present invention utilizes xylogen Substitute For Partial phenol to prepare resorcinol phenol formaldehyde resin, and phenol substitution rate is high.Wherein, xylogen substitutes phenol 10% ~ 50%, takes full advantage of forestry biomass discarded sections and substitutes phenol and prepare lignin modification foaming resol, has certain environment and economy and is worth;
2. the present invention is in advance to xylogen phenolate degradation treatment, improves the content of phenolic hydroxyl groups of xylogen, promotes xylogen and formaldehyde reaction;
3. present invention adds a small amount of high reactivity Resorcinol, improve the activity of lignin-base resol;
4. the present invention adopts formaldehyde solution and paraformaldehyde to prepare the resorcinol phenol formaldehyde resin of lignin modification, without the need to carrying out follow-up processed, simple to operate;
5. the foam materials mechanical strength prepared through curing molding of the resorcinol phenol formaldehyde resin of phenolate lignin modification of the present invention is high, falls slag rate low.The phenol formaldehyde foam compressive strength of lignin modification is 172.1kPa, and flexural strength is 254.6kPa, improves 22.1% and 12.2% respectively than the foamy body not adding xylogen; Falling slag rate is 19.1%, reduces 22.8% than unmodified foam.
Accompanying drawing explanation
Accompanying drawing is the infrared spectrogram before and after xylogen phenolate process.As can be seen from accompanying drawing, xylogen after phenolate process, 3273cm
-1the hydroxyl stretching vibration at place is strengthened, and hydroxy radical content obviously increases; 1594cm
-1for phenyl ring skeletal vibration characteristic peak; 1212cm
-1the phenolic hydroxyl group O-H flexural vibration peak at place strengthens, fingerprint region 813cm
-1outside the C-H face at place, formation vibration peak is strengthened, 755cm
-1and 692cm
-1there is formation vibration peak outside the para-orientation of phenol and mono-substituted C-H face in place, after showing xylogen phenolate, content of phenolic hydroxyl groups increases.
Embodiment
Basic catalyst sodium hydroxide, potassium hydroxide and hydrated barta in the embodiment of the present invention are the aqueous solution that mass concentration is 50%; " part " described in each embodiment all represents mass parts.
Below in conjunction with concrete example, illustrate the solution of the present invention and effect further.
A preparation method for phenolate lignin modification expandability resorcinol phenol formaldehyde resin, is characterized in that, by mass parts, consisting of:
Embodiment 1
The first step, xylogen phenolate degradation treatment: 4 parts of enzymolysis xylogens, 34 parts of phenol, 0.8 part of 50%NaOH solution are added in reactor, is warming up to 85 DEG C, reaction 60min; Second step, is cooled to 75 DEG C, adds 32 parts of formaldehyde solutions, carries out condensation polymerization reaction 10min; 3rd step, divides and adds 24 parts of paraformaldehydes for six times, and divide and add 0.8 part of 50%NaOH solution 75 DEG C reaction 60min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 4th step, is cooled to 50 DEG C, adds 2 parts of resorcin reaction 20min.The resorcinol phenol formaldehyde resin of obtained phenolate lignin modification.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
Embodiment 2
The first step, xylogen phenolate degradation treatment: 20 parts of sodium lignosulfonates, 12 parts of phenol, 5.6 parts of 50%NaOH solution are added in reactor, is warming up to 100 DEG C, reaction 240min; Second step, is cooled to 90 DEG C, adds 4 parts of formaldehyde solutions, carries out condensation polymerization reaction 40min; 3rd step, divides and adds 20 parts of paraformaldehydes for six times, and divide and add 2.4 parts of 50%NaOH solution 90 DEG C reaction 100min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 4th step, is cooled to 60 DEG C, adds 8 parts of resorcin reaction 100min.The resorcinol phenol formaldehyde resin of obtained phenolate lignin modification.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
Embodiment 3
The first step, xylogen phenolate degradation treatment: 10 parts of calcium lignin sulphonates, 24 parts of phenol, 4.5 parts of 50%KOH solution are added in reactor, is warming up to 90 DEG C, reaction 180min; Second step, is cooled to 85 DEG C, adds 20 parts of formaldehyde solutions, carries out condensation polymerization reaction 30min; 3rd step, divides and adds 16 parts of paraformaldehydes for six times, and divide and add 1.5 parts of 50%KOH 90 DEG C reaction 70min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 4th step, is cooled to 80 DEG C, adds 6 parts of resorcin reaction 70min.The resorcinol phenol formaldehyde resin of obtained phenolate lignin modification.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
Embodiment 4
The first step, xylogen phenolate degradation treatment: by 15 parts of alkali lignins, 20 parts of phenol, 3.5 parts of 50%Ba (OH)
2add in reactor, be warming up to 95 DEG C, reaction 210min; Second step, is cooled to 80 DEG C, adds 25 parts of formaldehyde solutions, carries out condensation polymerization reaction 35min; 3rd step, divides and adds 20 parts of paraformaldehydes for six times, divides and adds 4.5 parts of 50%Ba (OH) for four times
285 DEG C of reaction 80min, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 4th step, is cooled to 70 DEG C, adds 5 parts of resorcin reaction 60min.The resorcinol phenol formaldehyde resin of obtained phenolate lignin modification.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
Embodiment 5
The first step, xylogen phenolate degradation treatment: 8 parts of xylogen sodium, 28 parts of phenol, 3 parts of 50%KOH are added in reactor, is warming up to 92 DEG C, reaction 120min; Second step, is cooled to 88 DEG C, adds 15 parts of formaldehyde solutions, carries out condensation polymerization reaction 20min; 3rd step, divides and adds 10 parts of paraformaldehydes for six times, and divide and add 2 parts of 50%KOH 83 DEG C reaction 65min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 4th step, is cooled to 65 DEG C, adds 4 parts of resorcin reaction 50min.The resorcinol phenol formaldehyde resin of obtained phenolate lignin modification.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
The lignin modification resorcinol phenol formaldehyde resin of the non-phenolate process of comparative example 1
The first step, to add in reactor condensation polymerization reaction 20min at 80 DEG C by 12 parts of enzymolysis xylogens, 21 parts of phenol, 2 parts of 50%NaOH, 20 parts of formaldehyde solution; Second step, divides and adds 20 parts of paraformaldehydes for six times, and divide and add 5 parts 50%NaOH80 DEG C reaction 90min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 3rd step, is cooled to 70 DEG C, adds 7 parts of resorcin reaction 45min.The resorcinol phenol formaldehyde resin of obtained phenolate lignin modification.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
The pure resorcinol phenol formaldehyde resin of comparative example 2
The first step, to add in reactor condensation polymerization reaction 20min at 85 DEG C by 36 parts of phenol, 2 parts of 50%NaOH, 6 parts of formaldehyde solution; Second step, divides and adds 24 parts of paraformaldehydes for six times, and divide and add 5 parts of 50%NaOH 85 DEG C reaction 100min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical; 3rd step, is cooled to 60 DEG C, adds 4 parts of resorcin reaction 50min.Obtained pure resorcinol phenol formaldehyde resin.
The performance of resin fundamental property and foam materials thereof sees attached list 1.
Subordinate list 1: the performance of phenolate lignin modification resorcinol phenol formaldehyde resin and foam materials thereof
The detection of above-mentioned resol and foam materials thereof: viscosity detects under adopting NDJ-1 rotational viscosimeter 25 DEG C of conditions by GB/T14074-2006 regulation; Solids content detects by the regulation of GB/T14074-2006; Compressive strength specifies test by GB 8813-2008; Flexural strength specifies test by GB 8812-2007; Friability (falling slag rate) specifies to detect by GB/T 12812-2006.
Claims (7)
1. a preparation method for phenolate lignin modification expandability resorcinol phenol formaldehyde resin, is characterized in that, by mass parts, consisting of:
2. the preparation method of phenolate lignin modification expandability resorcinol phenol formaldehyde resin according to claim 1, is characterized in that comprising the following steps:
The first step, xylogen phenolate degradation treatment: 4 ~ 20 parts of xylogen, 12 ~ 34 parts of phenol, 0.8 ~ 5.6 part of basic catalyst are added in reactor, is warming up to 85 ~ 100 DEG C, reaction 60 ~ 240min;
Second step, is cooled to 75 ~ 95 DEG C, adds 4 ~ 32 parts of formaldehyde solutions, carries out condensation polymerization reaction 10 ~ 40min;
3rd step, divides and adds 7 ~ 24 parts of paraformaldehydes for six times, and divide and add remaining basic catalyst 75 ~ 95 DEG C reaction 60 ~ 100min for four times, wherein, the paraformaldehyde amount at every turn added is identical, and the amount of basic catalyst is also identical;
4th step, is cooled to 50 ~ 80 DEG C, adds 2 ~ 8 parts of resorcin reaction 20 ~ 100min.
3. the preparation method of phenolate lignin modification expandability resorcinol phenol formaldehyde resin according to claim 2, is characterized in that, described xylogen is any one in enzymolysis xylogen, sodium lignosulfonate, calcium lignin sulphonate or alkali lignin.
4. the preparation method of phenolate lignin modification expandability resorcinol phenol formaldehyde resin according to claim 2, it is characterized in that, described formaldehyde solution percentage composition is 37%.
5. the preparation method of phenolate lignin modification expandability resorcinol phenol formaldehyde resin according to claim 2, it is characterized in that, described paraformaldehyde is the industrial goods of 95%, and the polymerization degree is 8 ~ 12.
6. the preparation method of phenolate lignin modification expandability resorcinol phenol formaldehyde resin according to claim 2, is characterized in that, described basic catalyst is any one in the sodium hydroxide of mass concentration 50%, potassium hydroxide or hydrated barta.
7. the preparation method of phenolate lignin modification expandability resorcinol phenol formaldehyde resin according to claim 2, it is characterized in that, the lignin modification expandability resorcinol phenol formaldehyde resin solids content of preparation is 70% ~ 85%.
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| CN111040688A (en) * | 2019-12-24 | 2020-04-21 | 江南大学 | Lignin-based phenolic resin adhesive synergistically modified by polyphenol compound and phenol |
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Effective date of registration: 20220720 Address after: 401120 no.2-1, building 1-2, No.6 Xinnan Road, Longxi street, Yubei District, Chongqing Patentee after: Chongqing Jikai Technology Service Co.,Ltd. Address before: 247100 workshop No.26, new material industrial park, Jiangnan industrial concentration zone, Guichi District, Chizhou City, Anhui Province Patentee before: Chizhou ruiyat new materials Co.,Ltd. |
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