CN103274637A - Method for preparing thermal insulating cotton from kenaf bast - Google Patents
Method for preparing thermal insulating cotton from kenaf bast Download PDFInfo
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- CN103274637A CN103274637A CN2013102029809A CN201310202980A CN103274637A CN 103274637 A CN103274637 A CN 103274637A CN 2013102029809 A CN2013102029809 A CN 2013102029809A CN 201310202980 A CN201310202980 A CN 201310202980A CN 103274637 A CN103274637 A CN 103274637A
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- bluish dogbane
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Abstract
The invention discloses kenaf bast thermal insulating cotton. The thermal insulating cotton is prepared by using the following steps of: soaking the kenaf bast which is taken as a raw material in an alkali liquor, carrying out mechanical solution and pulping treatment, and adding an adhesive, a flame retardant, a water-proof agent and a foaming agent into the slurry solution of the kenaf bast respectively for foaming to obtain a lightweight wall thermal insulating material the density of which is 0.01-0.09g/cm<3>. The kenaf bast thermal insulating cotton has quite low heat conductivity coefficient and quite high oxygen index, and therefore the thermal insulating cotton has good flame retardation. Compared with the existing lightweight thermal insulating material on the market (such as a glass wool board and a polyurethane foam board), the kenaf bast thermal insulating cotton has predominant advantages both in the aspects of environment friendliness and cost.
Description
Technical field
The present invention relates toA kind of bluish dogbane skin insulating cotton belongs to the heat-insulating fireproof material technical field.
Background technology
Heat preserving and insulating material and goods are important factors that influence building energy conservation.The development of building thermal insulation material and application more and more are subjected to the generally attention of countries in the world.After the seventies in 20th century, generally pay attention to production and its application under construction of lagging material abroad, make every effort to reduce significantly the consumption of the energy, thereby reduce environmental pollution and Greenhouse effect.State's heat insulating material for external industry has had very long history, and building energy conservation accounts for the overwhelming majority with lagging material, and heat insulating material also constantly emerges in large numbers.
Along with the Chinese Urbanization's process is accelerated, build a building and be on the increase.The energy-saving building materials market of China is bigger, especially building thermal insulation material.The power loss of China's house dwelling house is roughly body of wall and accounts for 50%, and roofing accounts for 10%, and door and window accounts for 25%, and vault and ground account for 15%.This makes the Building Fire Protection problem become a focus of social concerns.In recent years, a lot of catastrophic buildingss event of catching fire took place in China, had caused irremediable heavy losses to the country and people.Central ministries and agencies have successively put into effect the generation that [2011] No. 65 literary compositions come standard and prevention building fire that disappears of [2009] No. 46 literary compositions of public logical word and public affairs for this reason.This regulation is carried out public logical [2009] No. 46 literary compositions of word as strict as possible; lagging material need use A level non-fire material; make the range of choice to lagging material become very narrow, existing market satisfies the lagging material that the A level do not fire has rock cotton board, inorganic glass bead, multicellular glass, foam cement, inorganic fibre etc. several.Discharge a large amount of heats during the burning of organic materials in these materials, produce a large amount of poison gas and not only can accelerate big fire spreading, cause trapped personnel and rescue personnel's injures and deaths easily.In addition, inorganic materials exists dust and fiber fines, and not only polluted air but also easy breed bacteria become the hidden danger that endangers health of people already.
Along with the enhancing day by day of people's environmental protection, safety, health perception, countries in the world begin the emphasis of environmental-protection flame-retardant material as development and application, and have obtained certain achievement.And Chinese insulating cotton market in urgent need novel material can reach national regulation insulating cotton standard, can environment not worked the mischief again.
Bluish dogbane is regarded as futurism plant, is a kind of strong stress resistance, anti-extensive cultivation, rapid, the higher annual textile plant of output of growth, and essential species is implanted in tropical and subtropical zone and temperate zone, the results phloem fiber.No matter be to consider that from degradation capability or from other environmental improvement functions the wide development prospect is arranged.There are a lot of area plantation bluish dogbanes in China, has every year a large amount of bluish dogbanes to burn as bavin.Utilize bluish dogbane leather insulating cotton, be not only and take full advantage of this resource, advocate environmental protection and reusable edible, and the raising of insulating cotton performance is also had positive pushing effect.
Summary of the invention
The invention provides a kind of bluish dogbane skin insulating cotton, its technical scheme that adopts is:
A kind of bluish dogbane skin insulating cotton, it is prepared from by comprising following steps:
A) with the bluish dogbane skin successively through dipping by lye, machinery is discongested and defibrination is handled, and obtains pulp fiber;
B) in pulp fiber, add tackiness agent, fire retardant, water-resisting agent and whipping agent successively, obtain foam;
C) foam is poured in the mould, passed through drainage and drying and moulding.
The described alkali lye of step a) is the sodium hydroxide solution of 2-6%wt; The time of described immersion is 36-64h; The described machinery time of discongesting is 8-16min.Described alkali lye is preferably the sodium hydroxide solution of 3%wt; The time of described immersion is preferably 50h; The described time of discongesting is preferably 12min.
Step b) is specially: pulp fiber is carried out mechanical stirring, add organic mixed glue, fire retardant, water-resisting agent and whipping agent in the whipping process successively, finally obtain foam.Described tackiness agent is organic blend glue stuff, is the mixed aqueous solution of 5%wt polyvinyl alcohol, 5%wt plant amylum, 25%wt white glue with vinyl and 0.05%wt polyacrylamide; Whipping agent is the thionamic acid octamylamine sodium-salt aqueous solution of 10%wt; Fire retardant is the mixture of clorafin and boric acid borax mass ratio 1:1, and its mesoboric acid borax is the mixture of boric acid and borax mass ratio 1:1; Water-resisting agent is the alkyl ketene dimer milky solution of 15%wt.Described tackiness agent consumption is the 40-80% of bone dry fiber quality; The consumption of water-resisting agent is the 2-4% of bone dry fiber quality; The fire retardant consumption is the 40-60% of bone dry fiber quality; Foaming agent consumption is the 60-100% of bone dry fiber quality.
The temperature of the drying and moulding described in the step c) is 95-105 ℃, and the time of drying and moulding is 24-48h.
Above bone dry fiber is that the quality of pulp fiber is in over dry.
The invention has the advantages that: (1) as the feedstock production fire retardant material, replaces existing organic polymer material and inorganic materials with the bluish dogbane skin, and the pollution that when reducing the organic materials burning environment is produced is in order to avoid work the mischief to HUMAN HEALTH.And this material and body of wall agree with better, difficult drop-off.(2) the bluish dogbane source is wide, and growth is rapid, and strong stress resistance is cheap.(3) the present invention preparation and bluish dogbane skin insulating cotton because having lower thermal conductivity and higher oxygen index, and possess good flame retardancy and heat insulation effect.
Description of drawings:
The preparation flow of Fig. 1 bluish dogbane skin insulating cotton
Embodiment
In order to make content of the present invention be convenient to more understand, below in conjunction with embodiment technical solutions according to the invention are described further, but the present invention is not limited only to this.
Embodiment 1
(1) earlier with the bluish dogbane peeling, clean, obtain the bluish dogbane skin.
(2) the bluish dogbane skin is earlier soaked 50h through the 3%wt sodium hydroxide solution, add water then and carry out machinery and discongest 12min, regulate slurry concentration to 5% by defibrination at last.
(3) in the 5%wt aqueous slurry solution, add organic mixed glue, fire retardant, water-resisting agent and whipping agent successively, under mechanical agitation, mixture paste is foamed, obtain foam.Wherein, tackiness agent boils for some time by water, polyvinyl alcohol, plant amylum, white glue with vinyl and polyacrylamide (mass ratio is 13:1:1:5:0.01) and mixes, and consumption is 60% of bone dry fiber quality; The fire retardant composition is clorafin and boric acid borax (boric acid and borax mass ratio are 1:1), and the consumption of clorafin and boric acid borax is 25% of bone dry fiber quality; The water-resisting agent composition is the alkyl ketene dimer of 15%wt, and consumption is 3% of bone dry fiber quality; Blowing agent component is the thionamic acid octamylamine sodium-salt aqueous solution of 10%wt, and consumption is 80% of bone dry fiber quality.
(4) foam is slowly poured in the mould that specification is 19 * 19 * 5cm, left standstill drainage 2-3min, then it is moved to dry 36h in 95 ℃ the air dry oven.
(5) adopt CNS GB/T 10294-2008 and GB/T 8924-2005 after the sample demoulding that drying is good, its thermal conductivity and oxygen index are measured.The measurement result of thermal conductivity and oxygen index is respectively 0.038 W/ (m.k) and 29.8%.
Embodiment 2
(1) earlier with the bluish dogbane peeling, clean, obtain the bluish dogbane skin.
(2) the bluish dogbane skin is earlier soaked 50h through the 3%wt sodium hydroxide solution, add water then and carry out machinery and discongest 12min, regulate slurry concentration to 5% by defibrination at last.
(3) in the 5%wt aqueous slurry solution, add organic mixed glue, fire retardant, water-resisting agent and whipping agent successively, under mechanical agitation, mixture paste is foamed, obtain foam.Wherein, tackiness agent boils for some time by water, polyvinyl alcohol, plant amylum, white glue with vinyl and polyacrylamide (mass ratio is 13:1:1:5:0.01) and mixes, and consumption is 60% of bone dry fiber quality; The fire retardant composition is clorafin and boric acid borax (boric acid and borax mass ratio are 1:1), and the consumption of clorafin and boric acid borax is 30% of bone dry fiber quality; The water-resisting agent composition is the alkyl ketene dimer of 15%wt, and consumption is 3% of bone dry fiber quality; Blowing agent component is the thionamic acid octamylamine sodium-salt aqueous solution of 10%wt, and consumption is 80% of bone dry fiber quality.
(4) foam is slowly poured in the mould that specification is 19 * 19 * 5cm, left standstill drainage 2-3min, then it is moved to dry 36h in 95 ℃ the air dry oven.
(5) adopt CNS GB/T 10294-2008 and GB/T 8924-2005 after the sample demoulding that drying is good, its thermal conductivity and oxygen index are measured.The measurement result of thermal conductivity and oxygen index is respectively 0.032 W/ (m.k) and 33.8%.
Embodiment 3
(1) earlier with the bluish dogbane peeling, clean, obtain the bluish dogbane skin.
(2) the bluish dogbane skin is earlier soaked 50h through the 3%wt sodium hydroxide solution, add water then and carry out machinery and discongest 12min, regulate slurry concentration to 5% by defibrination at last.
(3) in the 5%wt aqueous slurry solution, add organic mixed glue, fire retardant, water-resisting agent and whipping agent successively, under mechanical agitation, mixture paste is foamed, obtain foam.Wherein, tackiness agent boils for some time by water, polyvinyl alcohol, plant amylum, white glue with vinyl and polyacrylamide (mass ratio is 13:1:1:5:0.01) and mixes, and consumption is 60% of bone dry fiber quality; The fire retardant composition is clorafin and boric acid borax (boric acid and borax mass ratio are 1:1), and the consumption of clorafin and boric acid borax is 20% of bone dry fiber quality; The water-resisting agent composition is the alkyl ketene dimer of 15%wt, and consumption is 3% of bone dry fiber quality; Blowing agent component is the thionamic acid octamylamine sodium-salt aqueous solution of 10%wt, and consumption is 80% of bone dry fiber quality.
(4) foam is slowly poured in the mould that specification is 19 * 19 * 5cm, left standstill drainage 2-3min, then it is moved to dry 36h in 95 ℃ the air dry oven.
(5) adopt CNS GB/T 10294-2008 and GB/T 8924-2005 after the sample demoulding that drying is good, its thermal conductivity and oxygen index are measured.The measurement result of thermal conductivity and oxygen index is respectively 0.043 W/ (m.k) and 22.6%.
Claims (7)
1. bluish dogbane skin insulating cotton, it is prepared from by comprising following steps:
A) with the bluish dogbane skin successively through dipping by lye, machinery is discongested and defibrination is handled, and obtains pulp fiber;
B) in pulp fiber, add tackiness agent, fire retardant, water-resisting agent and whipping agent successively, obtain foam;
C) foam is poured in the mould, passed through drainage and drying and moulding.
2. the preparation method of bluish dogbane skin insulating cotton as claimed in claim 1 is characterized in that, the described alkali lye of step a) is the sodium hydroxide solution of 2-6%wt; The time of described immersion is 36-64h; The described machinery time of discongesting is 8-16min.
3. the preparation method of bluish dogbane skin insulating cotton as claimed in claim 1 is characterized in that, the described alkali lye of step a) is preferably the sodium hydroxide solution of 3%wt; The time of described immersion is preferably 50h; The described time of discongesting is preferably 12min.
4. the preparation method of bluish dogbane skin insulating cotton as claimed in claim 1, it is characterized in that step b) is specially: pulp fiber is carried out mechanical stirring, add organic mixed glue, fire retardant, water-resisting agent and whipping agent in the whipping process successively, finally obtain foam.
5. the preparation method of bluish dogbane skin insulating cotton as claimed in claim 1, it is characterized in that the tackiness agent described in the step b) is organic blend glue stuff, is the mixed aqueous solution of 5%wt polyvinyl alcohol, 5%wt plant amylum, 25%wt white glue with vinyl and 0.05%wt polyacrylamide; Whipping agent is the thionamic acid octamylamine sodium-salt aqueous solution of 10%wt; Fire retardant is the mixture of clorafin and boric acid borax mass ratio 1:1, and its mesoboric acid borax is the mixture of boric acid and borax mass ratio 1:1; Water-resisting agent is the alkyl ketene dimer milky solution of 15%wt.
6. the preparation method of bluish dogbane skin insulating cotton as claimed in claim 1 is characterized in that the tackiness agent consumption described in the step b) is the 40-80% of bone dry fiber quality; The consumption of water-resisting agent is the 2-4% of bone dry fiber quality; The fire retardant consumption is the 40-60% of bone dry fiber quality; Foaming agent consumption is the 60-100% of bone dry fiber quality.
7. the preparation method of bluish dogbane skin insulating cotton as claimed in claim 1, the temperature that it is characterized in that the drying and moulding described in the step c) is 95-105 ℃, the time of drying and moulding is 24-48h.
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| CN201310202980.9A CN103274637B (en) | 2013-05-28 | 2013-05-28 | Method for preparing thermal insulating cotton from kenaf bast |
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| CN201310202980.9A CN103274637B (en) | 2013-05-28 | 2013-05-28 | Method for preparing thermal insulating cotton from kenaf bast |
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| CN103274637A true CN103274637A (en) | 2013-09-04 |
| CN103274637B CN103274637B (en) | 2015-02-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120635A (en) * | 2014-07-11 | 2014-10-29 | 福建农林大学 | Degradable flame-retardant heat preservation ultralight foam material and preparation method thereof |
| CN105293890A (en) * | 2015-10-09 | 2016-02-03 | 蚌埠市天源气体有限责任公司 | Heat-preservation cotton used for low-temperature pipeline |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912247A (en) * | 2006-07-07 | 2007-02-14 | 福建农林大学 | Method for preparing vegetable fibre liquid foam package material |
| CN101962272A (en) * | 2010-10-18 | 2011-02-02 | 福建农林大学 | Flame-retardant plant fiber construction heat-insulation wall material and preparation method thereof |
| CN103030890A (en) * | 2012-12-29 | 2013-04-10 | 重庆理工大学 | Light polymer base fibrilia reinforced composite and fabrication method thereof |
-
2013
- 2013-05-28 CN CN201310202980.9A patent/CN103274637B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912247A (en) * | 2006-07-07 | 2007-02-14 | 福建农林大学 | Method for preparing vegetable fibre liquid foam package material |
| CN101962272A (en) * | 2010-10-18 | 2011-02-02 | 福建农林大学 | Flame-retardant plant fiber construction heat-insulation wall material and preparation method thereof |
| CN103030890A (en) * | 2012-12-29 | 2013-04-10 | 重庆理工大学 | Light polymer base fibrilia reinforced composite and fabrication method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 聂玉静等: "红麻在人造板工业上的研究现状和应用前景", 《木材加工机械》, no. 3, 31 December 2009 (2009-12-31), pages 38 - 41 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120635A (en) * | 2014-07-11 | 2014-10-29 | 福建农林大学 | Degradable flame-retardant heat preservation ultralight foam material and preparation method thereof |
| CN104120635B (en) * | 2014-07-11 | 2016-07-06 | 福建农林大学 | The preparation method that a kind of degradable anti-flaming is incubated ultralight expanded material |
| CN105293890A (en) * | 2015-10-09 | 2016-02-03 | 蚌埠市天源气体有限责任公司 | Heat-preservation cotton used for low-temperature pipeline |
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