CN103087416A - Method for reducing bamboo/plastic composite material thermal expansion coefficient by using inorganic filling material - Google Patents
Method for reducing bamboo/plastic composite material thermal expansion coefficient by using inorganic filling material Download PDFInfo
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- CN103087416A CN103087416A CN2013100417710A CN201310041771A CN103087416A CN 103087416 A CN103087416 A CN 103087416A CN 2013100417710 A CN2013100417710 A CN 2013100417710A CN 201310041771 A CN201310041771 A CN 201310041771A CN 103087416 A CN103087416 A CN 103087416A
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Abstract
The invention relates to a method for reducing bamboo/plastic composite material thermal expansion coefficient by using an inorganic filling material. The method comprises the steps that: 1, raw materials of plastic (polyethylene and polypropylene with a ratio of 1:9) R-PP and PE, precipitated calcium carbonate PCC, bamboo fiber RBF, bamboo particles GBP, silane-treated bamboo fiber TRBF, and silane-treated bamboo particles TGBP are prepared; 2, plasticizing granulation is carried out, wherein the raw materials are added into a double-screw extruder, and is subjected to plasticizing granulation under a rotation speed of 90r/min and a temperature of 155-180 DEG C; 3, prepared substrate particles are dried for 24h under a temperature of 85 DEG C; 4, a sample is prepared; and 5, when sample preparation is finished, the material cooled for 72h under room temperature. The method provided by the invention has the advantage that: with the application of the inorganic filling material, the thermal expansion coefficient of the bamboo/plastic composite material is reduced. The method is simple and feasible, and has a good effect. The method can be widely used in modification of bamboo (wood)/plastic composite material thermal expansion coefficients.
Description
Technical field
What the present invention relates to is a kind of method of utilizing mineral filler to reduce bamboo/plastic composite materials thermal expansivity, belongs to bamboo/plastic composite materials technical field.
Background technology
Bamboo (wood) plastic composite materials has become a kind of important functional material gradually.Compare with traditional composite wooden material, bamboo (wood) plastic composite materials is higher than plastics hardness, has the characteristics of the processibility of thermoplastics, can reuse and recycling, and biodegradable.The important index of hot expansibility in machinery and thermomechanical property research, its numerical value are important parameters in the engineering materials design.When temperature change, the free volume of material internal increases, thereby produces heat energy, the thermal expansion phenomenon occurs.Linear expansion system (LTEC) is an important parameters of engineering design, can be used for measuring material along with temperature the dimensional change after raising, to the using and develop and all play vital effect of material, what show when engineering materials assemble is particularly important.The factor that affects the superpolymer thermal expansivity has the density of superpolymer, degree of crystallinity, crystalline size, the course of processing (extruded velocity, extrusion pressure and extrusion temperature) etc.For matrix material, except the performance of matrix itself, filler long-width ratio, massfraction, direction and distribution also all also have certain influence to the thermal expansivity of matrix material.The LTEC value of timber (along timber rift grain direction) and mineral (as calcium carbonate) is approximately 1/20 of plastics LTEC value, 1/10 of biological fiber reinforced composite, its proportion perpendicular to the LTEC value of grain direction (radially with tangential) and timber is proportional, is about along the 5-10 of timber rift grain direction LTEC value doubly.Therefore, inorganic mineral and biological fiber can be used as the strongthener use that reduces the superpolymer thermal expansivity.
Summary of the invention
What the present invention proposed is a kind of method of utilizing mineral filler to reduce bamboo/plastic composite materials thermal expansivity, its objective is the thermal expansivity of reduction core-list structure wood plastic composite.
Technical solution of the present invention: utilize inorganic mineral to reduce the method for bamboo-plastic composite material thermal expansivity for strongthener; The method comprises following processing step:
One, get raw material, comprising:
1) plastics, plastics comprise polyethylene and polypropylene, and polyethylene and polyacrylic mass percent are polyethylene: polypropylene=1:9;
2) precipitated chalk is with 40 wt% massfractions;
3) bamboo fibers is with 40 wt% massfractions or the bamboo fibers crossed through silane treatment, respectively with 40 wt% massfractions;
4) bamboo particle is with 40 wt% massfractions or the bamboo particle crossed through silane treatment, respectively with 40 wt% massfractions;
5) through bamboo fibers that silane treatment is crossed, be to be processed by following methods to make through the bamboo particle that silane treatment is crossed: will treat that at first the bamboo fibers of silane treatment and bamboo particle dry 24 h under 85 ° of C, guarantee that its water ratio below 2 %, prepares treatment solution simultaneously; This treatment solution is comprised of methyl alcohol, pure water and solution of silane, press massfraction than being 8.1:0.9:1, wherein solution of silane be 1-amino-1-aminopropyl-Trimethoxy silane content more than or equal to 60%, the quality of solution of silane is to treat the bamboo fibers of silane treatment and 3 wt% of bamboo granular mass; Then dried bamboo fibers and bamboo particle are flooded 1 h under 25 ° of C of room temperature; After dipping is completed, 100 orders that impregnated bamboo fibers and bamboo particle are looked over so as to check after oven dry 24 h under 85 ° of C;
Two, added by single filler: comprising: precipitated chalk, bamboo fibers, bamboo particle or the bamboo fibers of crossing through silane treatment and the bamboo particle of crossing through silane treatment, wherein; Bamboo fibers, bamboo particle or the bamboo fibers of crossing through silane treatment and the bamboo particle of crossing through silane treatment are respectively with 40 wt% massfraction reinforced plastics matrixes; Precipitated chalk is from 3 wt%, 7wt%, and the massfraction of 10wt%15wt% to 30wt% is the reinforced plastics matrix respectively;
Three, plasticizing granulation adds above-mentioned raw materials in twin screw extruder, plastifies granulation take rotating speed 90 r/ min, temperature as 155 ℃-180 ℃;
Four, the blapharoplast of making, 85 ℃ of temperature, dry 24 h;
Five, sample preparation, blapharoplast after drying adds Plus 35 type injection molding machine sample preparations, and injection temperature is 175 ℃, and 68 ℃ of mold temperatures do not add the plastics R-PP﹠amp of auxiliary agent; The sample injection temperature of PE matrix is 180 ℃, 54 ℃ of mold temperatures;
Six, after sample preparation is completed, cooling 72 h at room temperature.
Advantage of the present invention: by the use of mineral filler, make the thermal expansivity of bamboo-plastic composite material be reduced.Operation is simple and feasible for present method, effective, can be widely used in the modification of bamboo (wood) plastic composite materials thermal expansivity.
Embodiment
Embodiment
Utilize inorganic mineral to reduce the method for bamboo-plastic composite material thermal expansivity for strongthener; Comprise following processing step:
One, get raw material, comprise
1) plastics R-PP﹠amp; PE, plastics R-PP﹠amp; PE comprises polyethylene and polypropylene, and polyethylene and polyacrylic mass percent are polyethylene: polypropylene=1:9;
2) precipitated chalk PCC is with 40 wt% massfractions;
3) bamboo fibers RBF is with 40 wt% massfractions or the bamboo fibers TRBF that crosses through silane treatment, respectively with 40 wt% massfractions;
4) bamboo particle GBP is with 40 wt% massfractions or the bamboo particle TGBP that crosses through silane treatment, respectively with 40 wt% massfractions;
Described silane treatment: be to be processed by following methods to make through bamboo fibers TRBF, bamboo particle TGBP that silane treatment is crossed: will treat that at first the bamboo fibers RBF of silane treatment and bamboo particle GBP dry 24 h under 85 ° of C, guarantee that its water ratio below 2 %, prepares treatment solution simultaneously; This treatment solution is comprised of methyl alcohol, pure water and solution of silane, press massfraction than being 8.1:0.9:1, wherein solution of silane be 1-amino-1-aminopropyl-Trimethoxy silane content more than or equal to 60%, the quality of solution of silane is to treat the bamboo fibers RBF of silane treatment and 3 wt% of bamboo particle GBP quality; Then dried bamboo fibers RBF and bamboo particle GBP are flooded 1 h under 25 ° of C of room temperature; After dipping is completed, 100 orders that impregnated bamboo fibers RBF and bamboo particle GBP are looked over so as to check after oven dry 24 h under 85 ° of C;
Two, experiment is minutes two groups, and wherein first group of experiment added by single filler: comprising: precipitated chalk PCC, bamboo fibers RBF, bamboo particle GBP or the bamboo fibers TRBF that crosses through silane treatment and the bamboo particle TGBP that crosses through silane treatment, wherein; Bamboo fibers RBF, bamboo particle GBP or the bamboo fibers TRBF and the bamboo particle TGBP that cross through silane treatment strengthen R-PP﹠amp with 40 wt% massfractions respectively; The PE matrix; Precipitated chalk PCC is from 3 wt%, 7wt%, and the massfraction of 10wt%15wt% to 30wt% strengthens respectively R-PP﹠amp; The PE matrix;
Second group of experiment, organic filler and mineral filler add simultaneously, the matrix material that organic filler comprises:
1) precipitated chalk PCC and bamboo fibers RBF, massfraction is respectively 40 wt%;
2) precipitated chalk PCC and the bamboo fibers TRBF that crosses through silane treatment, massfraction is respectively 40 wt%;
3) precipitated chalk PCC and bamboo particle GBP, massfraction is respectively 40 wt%;
4) precipitated chalk PCC and the bamboo particle TGBP that crosses through silane treatment, massfraction is respectively 40 wt%;
Mineral filler precipitated chalk PCC strengthens respectively R-PP﹠amp from the massfraction of 6 wt%, 12 wt% to 18 wt%; The PE matrix;
Three, plasticizing granulation adds above-mentioned raw materials in twin screw extruder, plastifies granulation take rotating speed 90 r/ min, temperature as 155 ℃-180 ℃;
Four, the blapharoplast of making, 85 ℃ of temperature, dry 24 h;
Five, sample preparation, blapharoplast after drying adds Plus 35 type injection molding machine sample preparations, and injection temperature is 175 ℃, and 68 ℃ of mold temperatures do not add the plastics R-PP﹠amp of auxiliary agent; The sample injection temperature of PE matrix is 180 ℃, 54 ℃ of mold temperatures;
Six, after sample preparation is completed, cooling 72 h at room temperature.
Table 1 precipitated chalk PCC add-on is to R-PP﹠amp; The impact of PE/PCC/GBP (TGBP) Thermal expansion coefficient of composites
Annotate: above % refers to mass percent; A, B, C ... significance after the expression variance analysis, same letter representation variance analysis there was no significant difference, probable value is set as 0.05; Numerical value is 5 mean values after test, and in bracket, numerical value is standard deviation.
After the adding of PCC, matrix material (R-PP﹠amp; PE/PCC/GBP and R-PP﹠amp; PE/PCC/TGBP) LTEC reduces (table 1) along with increasing of PCC add-on.When the add-on of PCC is increased to 18%, PP﹠amp; The LTEC of PE/PCC/GBP has reduced respectively 66.7%, 61.3% and 63.1%, and the TGBP that crosses through silane treatment has the effect of better reduction thermal expansion, has reduced respectively 70.6%, 65.5%, 64.2%, PP﹠amp 3 temperature ranges; The reason that the LTEC of PE/PCC/TGBP is lower is the effect that silane plays coupling agent, allows the better of filler and plastic substrate combination, thereby has played the effect of restriction thermal expansion.
Table 2 PCC add-on is to R-PP﹠amp; The impact of PE/PCC/RBF (TRBF) Thermal expansion coefficient of composites
Annotate: above % refers to mass percent; Numerical value is 5 mean values after test, and in bracket, numerical value is standard deviation.
R-PP﹠amp; The LTEC of PE/PCC/ RBF (TRBF) matrix material sees Table 2, with pure R-PP﹠amp; PE matrix phase ratio, after the adding of PCC, matrix material (R-PP﹠amp; PE/PCC/ RBF and R-PP﹠amp; PE/PCC/TRBF) LTEC reduces along with increasing of PCC add-on.When the add-on of PCC is increased to 18%, R-PP﹠amp; PE/PCC/ RBF matrix material has reduced respectively 69.2%, 64.8%, 65.8%, matrix material R-PP﹠amp; PE/PCC/TRBF has reduced respectively 74.4%, 66.9%, 67.1% 3 temperature ranges, with R-PP﹠amp; PE/PCC/GBP (TGBP) matrix material is similar, and the TRBF that crosses through silane treatment has the effect of better reduction thermal expansion.
PCC reduces the thermal expansivity of plastic substrate:
Table 3 PCC add-on is to PCC/ R-PP﹠amp; The impact of PE Thermal expansion coefficient of composites
Annotate: above % refers to mass percent; A, B, C ... significance after the expression variance analysis, same letter representation variance analysis there was no significant difference, probable value is set as 0.05; Numerical value is 5 mean values after test, and in bracket, numerical value is standard deviation.
When the PCC add-on from 3wt%, 7wt%, 10wt% is when 15wt% is increased to 30wt%, along with the LTEC of the rising matrix material of PCC content significantly reduces (table 3).When PCC content was 30wt%, the LTEC of matrix material was minimum, purer R-PP﹠amp; The PE matrix has reduced respectively 20.1%, 17.6 % and 19.6%.
Claims (2)
1. utilize inorganic mineral to reduce the method for bamboo-plastic composite material thermal expansivity for strongthener; It is characterized in that the method comprises following processing step:
One, get raw material, comprising:
1) plastics (R-PP﹠amp; PE), plastics (R-PP﹠amp; PE) comprise polyethylene and polypropylene, polyethylene and polyacrylic mass percent are polyethylene: polypropylene=1:9;
2) precipitated chalk (PCC) is with 40 wt% massfractions;
3) bamboo fibers (RBF) is with 40 wt% massfractions or the bamboo fibers (TRBF) crossed through silane treatment, respectively with 40 wt% massfractions;
4) bamboo particle (GBP) is with 40 wt% massfractions or the bamboo particle (TGBP) crossed through silane treatment, respectively with 40 wt% massfractions;
5) through bamboo fibers (TRBF) that silane treatment is crossed, be to be processed by following methods to make through the bamboo particle (TGBP) that silane treatment is crossed: will treat that at first the bamboo fibers (RBF) of silane treatment and bamboo particle (GBP) dry 24 h under 85 ° of C, guarantee that its water ratio below 2 %, prepares treatment solution simultaneously; This treatment solution is comprised of methyl alcohol, pure water and solution of silane, press massfraction than being 8.1:0.9:1, wherein solution of silane be 1-amino-1-aminopropyl-Trimethoxy silane content more than or equal to 60%, the quality of solution of silane is to treat 3 wt% of the bamboo fibers of silane treatment (RBF) and bamboo particle (GBP) quality; Then dried bamboo fibers (RBF) and bamboo particle (GBP) are flooded 1 h under 25 ° of C of room temperature; After dipping is completed, 100 orders that impregnated bamboo fibers (RBF) and bamboo particle (GBP) are looked over so as to check after drying 24 h under 85 ° of C;
Two, added by single filler: comprising: precipitated chalk (PCC), bamboo fibers (RBF), bamboo particle (GBP) or the bamboo fibers (TRBF) of crossing through silane treatment and the bamboo particle (TGBP) of crossing through silane treatment, wherein; Bamboo fibers (RBF), bamboo particle (GBP) or the bamboo fibers (TRBF) of crossing through silane treatment and the bamboo particle (TGBP) of crossing through silane treatment are respectively with 40 wt% massfraction reinforced plastics (R-PP﹠amp; PE) matrix; Precipitated chalk (PCC) is from 3 wt%, 7wt%, and the massfraction of 10wt%15wt% to 30wt% is reinforced plastics (R-PP﹠amp respectively; PE) matrix;
Three, plasticizing granulation adds above-mentioned raw materials in twin screw extruder, plastifies granulation take rotating speed 90 r/ min, temperature as 155 ℃-180 ℃;
Four, the blapharoplast of making, 85 ℃ of temperature, dry 24 h;
Five, sample preparation, blapharoplast after drying adds Plus 35 type injection molding machine sample preparations, and injection temperature is 175 ℃, and 68 ℃ of mold temperatures do not add the plastics R-PP﹠amp of auxiliary agent; The sample injection temperature of PE matrix is 180 ℃, 54 ℃ of mold temperatures;
Six, after sample preparation is completed, cooling 72 h at room temperature.
2. utilize inorganic mineral to reduce the method for bamboo-plastic composite material thermal expansivity for strongthener, it is characterized in that the method comprises following processing step:
One, get raw material, comprising:
1) plastics (R-PP﹠amp; PE), plastics (R-PP﹠amp; PE) comprise polyethylene and polypropylene, polyethylene and polyacrylic mass percent are polyethylene: polypropylene=1:9;
2) precipitated chalk (PCC) is with 40 wt% massfractions;
3) bamboo fibers (RBF) is with 40 wt% massfractions or the bamboo fibers (TRBF) crossed through silane treatment, respectively with 40 wt% massfractions;
4) bamboo particle (GBP) is with 40 wt% massfractions or the bamboo particle (TGBP) crossed through silane treatment, respectively with 40 wt% massfractions;
Described silane treatment: be to be processed by following methods to make through bamboo fibers (TRBF), bamboo particle (TGBP) that silane treatment is crossed: will treat that at first the bamboo fibers (RBF) of silane treatment and bamboo particle (GBP) dry 24 h under 85 ° of C, guarantee that its water ratio below 2 %, prepares treatment solution simultaneously; This treatment solution is comprised of methyl alcohol, pure water and solution of silane, press massfraction than being 8.1:0.9:1, wherein solution of silane be 1-amino-1-aminopropyl-Trimethoxy silane content more than or equal to 60%, the quality of solution of silane is to treat 3 wt% of the bamboo fibers of silane treatment (RBF) and bamboo particle (GBP) quality; Then dried bamboo fibers (RBF) and bamboo particle (GBP) are flooded 1 h under 25 ° of C of room temperature; After dipping is completed, 100 orders that impregnated bamboo fibers (RBF) and bamboo particle (GBP) are looked over so as to check after drying 24 h under 85 ° of C;
Two, organic filler and mineral filler add simultaneously, the matrix material that organic filler comprises:
1) precipitated chalk (PCC) and bamboo fibers (RBF), massfraction is respectively 40 wt%;
2) precipitated chalk (PCC) and the bamboo fibers (TRBF) crossed through silane treatment, massfraction is respectively 40 wt%;
3) precipitated chalk (PCC) and bamboo particle (GBP), massfraction is respectively 40 wt%;
4) precipitated chalk (PCC) and the bamboo particle (TGBP) crossed through silane treatment, massfraction is respectively 40 wt%;
Mineral filler precipitated chalk (PCC) is from the massfraction difference reinforced plastics R-PP﹠amp of 6 wt%, 12 wt% to 18 wt%; The PE matrix;
Three, plasticizing granulation adds above-mentioned raw materials in twin screw extruder, plastifies granulation take rotating speed 90 r/ min, temperature as 155 ℃-180 ℃;
Four, the blapharoplast of making, 85 ℃ of temperature, dry 24 h;
Five, sample preparation, blapharoplast after drying adds Plus 35 type injection molding machine sample preparations, and injection temperature is 175 ℃, and 68 ℃ of mold temperatures do not add the plastics (R-PP﹠amp of auxiliary agent; PE) the sample injection temperature of matrix is 180 ℃, 54 ℃ of mold temperatures;
Six, after sample preparation is completed, cooling 72 h at room temperature.
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| CN107060318A (en) * | 2017-05-11 | 2017-08-18 | 扬州赛创新材料科技有限公司 | A kind of composite building template and its manufacture method |
| CN115230063A (en) * | 2022-07-06 | 2022-10-25 | 青岛弧光高分子科技有限公司 | High-strength injection molding connection method for metal and polymer composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107060318A (en) * | 2017-05-11 | 2017-08-18 | 扬州赛创新材料科技有限公司 | A kind of composite building template and its manufacture method |
| CN115230063A (en) * | 2022-07-06 | 2022-10-25 | 青岛弧光高分子科技有限公司 | High-strength injection molding connection method for metal and polymer composite material |
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Application publication date: 20130508 |