CN107602926A - A kind of preparation method of corn cob fiber element film - Google Patents
A kind of preparation method of corn cob fiber element film Download PDFInfo
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- CN107602926A CN107602926A CN201710873785.7A CN201710873785A CN107602926A CN 107602926 A CN107602926 A CN 107602926A CN 201710873785 A CN201710873785 A CN 201710873785A CN 107602926 A CN107602926 A CN 107602926A
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Abstract
The present invention relates to a kind of preparation method of corn cob fiber element film, belong to field of material technology.Corncob is taken, is washed, is dried, ball milling, sieving, obtains ball milling corncob powder；Ball milling corncob powder is heated, filters, obtains filter residue I；Washed, and be dipped in hydrochloric acid with sodium hydroxide solution, hydrochloric acid solution, liquor natrii hypochloritis respectively, alcohol flushing is used after immersion, through drying, ball milling, obtain corn cob fiber element；Take PLA to pour into dichloroethanes, stir, the corn cob fiber element and polyvinyl alcohol of preparation are poured into wherein, stirring, sonic oscillation, obtain coating liquid；Coating thickness is controlled, is dried, is taken off film, produce a kind of corn cob fiber element film.
Description
Technical field
The present invention relates to a kind of preparation method of corn cob fiber element film, belong to field of material technology.
Background technology
In the 1950s, agricultural plastic film soverlay technique is first in the agricultural production of Japan and European and American developed countries
Use.The agricultural plastic film mainly includes canopy film and mulch film, in addition also sunshade net, fly net, forage grass film and agricultural
Non-woven fabrics etc..The plastic sheeting being mentioned herein is primarily referred to as the plastic film for covering ground, due to covered rearing with plastic film
Face can be incubated, water conservation, it is anti-grass, insect prevention, significant economic benefit is achieved in agricultural production, so, with film cover ground
Cultivation technique be promoted rapidly.Japan takes to the research of plastic sheeting ground cultivation within 1948, and it is to study this
Technology is earliest, the country of Income Maximum.Nineteen sixty-five, Italy started to use covered rearing with plastic film crop culture, was mainly used to cover
The remunerative crops such as coffee, pineapple, strawberry and tobacco；Film is mainly used in early spring low temperature arid season by the former Soviet Union,
To improve the soil moisture and prevent soil water evaporation；The U.S. keeps a full stand of seedings plastic sheeting for farmland, can reach the increase soil water
Point, the regulation soil moisture and the purpose for preventing weed growth.France begins to use plastic sheeting ground covering technique within 1971, covers
The crop of lid cultivation has tomato, corn, muskmelon, broad bean, grape, coffee, citrus, cocoa etc..Due to film covered ground
Using effect of the technology in agricultural production is notable, and therefore, technique is welcome by more and more producers.According to international agriculture
Reported with the plastics committee, its member state there are about 10 for the plastic resin of agricultural production every year8Kg, therein 70%~80% uses
In the production of plastic sheeting, and covered rearing with plastic film area increases considerably every year.
China introduced covered rearing with plastic film technology in 1978 from Japan, and was carried out first in Shanxi and the province of Heilungkiang two
44hm2Covered rearing with plastic film experiment in cultivation, obtain yield increase effect be up to 30%~50%；Gradually expand to test area in 1980
To 1666.7hm2；China in 1981 is applied to the covering of various vegetables crop using ldpe resin production film
Experiment in cultivation；Nineteen eighty-two nurse crop is expanded to cotton, peanut, corn etc.；Plastic sheeting is used for sugarcane, west by nineteen eighty-three again
The industrial crops covering experiment of more than the 40 individual kind such as melon, tobacco, all achieves huge economic benefit.From this, plastic sheeting
Culture underglass technology has obtained Rapid Popularization, while one " White Revolution " is also result in the agricultural production in China, covering
Area is expanded with 15%~20% growth rate in the whole nation every year.Area coverage reaches 6.6 × 10 within 19986hm2.2004 I
State's agricultural plastic film consumption is up to 1,680,000 tons, and wherein canopy film usage amount is up to 900,000 tons, nearly 4,000,000 hectares of area coverage；
Film is per 780,000 tons or so of Year's consumption, and area coverage is up to 15,000,000 hectares.According to
Statistics, 690.4 ten thousand tons of plastic sheeting yield in 2009,616.1 ten thousand tons of the yield than 2008 increase 12%, agricultural thin
119.4 ten thousand tons of yield than 2008 of film yield increases by 18.4% on a year-on-year basis.Plastic-sheet-covered cultivation area in 2010 is extended to 2.1 ×
107hm2, rate is popularized closely up to 41.3%, and the year consumption of film increases to 7.8x108Kg, it is acknowledged as consumption figure and occupies generation
First, boundary.According to scholarly forecast, in the coming years, market is to the demand of plastic sheeting by with 9% speed sustainable growth.
The content of the invention
The technical problems to be solved by the invention：It is poor for Traditional Agricultural banana, not degradable, plastic grain drift
A kind of floating the problem of having a strong impact on human health, there is provided preparation method of corn cob fiber element film.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
（1）100 ~ 120g corncobs are taken, are dried after cleaning, ball milling sieving, obtain ball milling corncob powder；
（2）Ball milling corncob powder is poured into 1000 ~ 1200g deionized water, heat boiling, filtering, obtain filter residue I；
（3）Filter residue I is respectively rinsed 5~8 times with sodium hydroxide solution, hydrochloric acid solution, liquor natrii hypochloritis successively, completion to be rinsed
Afterwards, modified filter residue is obtained；
（4）In mass ratio 1:5, modified filter residue is mixed with 0.1mol/L hydrochloric acid solutions, after 6~8h of standing, then 5200~
10~15min is centrifuged under 6000r/min, lower sediment is collected and rinses 3~5h with absolute ethyl alcohol, obtain modified filter cake,
（5）Modified filter cake is placed in baking oven and dried, ball milling, obtains Semen Maydis cellulose；
（6）Take 50 ~ 60g PLAs to be poured into 20 ~ 25mL dichloroethanes, corn cob fiber element is poured into after stirring and 5 ~ 8g gathers
Vinyl alcohol, ultrasonic vibration after stirring, obtains coating liquid；
（7）By coating liquid even spread on a glass, move into baking oven and dry after film terminates, take off film, produce to obtain a kind of jade
Rice core cellulose film.
Step（1）The mesh number of described sieving is 80.
Step（3）The mass fraction of described sodium hydroxide solution is 2%.
Step（3）The mass fraction of described liquor natrii hypochloritis is 5%.
Step（3）The mass fraction of described hydrochloric acid is 10%.
Step（6）Described drying time is 18 ~ 20h.
Compared with other method, advantageous effects are the present invention：
（1）The present invention is during corn cob fiber element film is prepared, and the cellulose and PLA prepared using corncob is original
Material, it is biodegradable after obtained film is discarded, carbon dioxide and water are only generated, is not polluted the environment, safety and environmental protection.
（2）Corn cob fiber element film prepared by the present invention is more stable, will not be produced after long-time illumination and be harmful to people
The material of body, while its gas permeability there has also been larger lifting.
Embodiment
100~120g corncobs are taken, after being washed with deionized water only, 5~6h in 50~60 DEG C of baking oven is placed in, takes out rearmounted
In ball grinder, with 300~320r/min rotating speed 60~80min of ball milling, 80 mesh sieves are crossed, obtain ball milling corncob powder；By 150
~200g ball milling corncob powders are poured into 1000~1200g deionized water, continue 5~6min of boiling, mistake after being heated to boiling
Filter, obtains filter residue I；The sodium hydroxide solution, the hydrochloric acid solution of mass fraction 10%, quality for being successively 2% with mass fraction by filter residue I
The liquor natrii hypochloritis of fraction 5% respectively rinses 5~8 times, after the completion of to be rinsed, obtains modified filter residue, in mass ratio 1:5, filtered modified
Slag mixes with 0.1mol/L hydrochloric acid solutions, after standing 6~8h, then 10~15min is centrifuged under 5200~6000r/min,
Collect lower sediment and rinse 3~5h with absolute ethyl alcohol, obtain modified filter cake, modified filter cake is placed in 4 in 45~50 DEG C of baking oven
After~5h, with 150~160r/min rotating speed 20~30min of ball milling, corn cob fiber element is obtained；50~60g PLAs are taken to pour into
Into 20~25mL dichloroethanes, stir to PLA all dissolving, by the corn cob fiber element and the poly- second of 5~8g of preparation
Enol pours into wherein, stirs 15~20min with 150~180r/min rotating speed, is subsequently placed at 180~220W sonic oscillation instrument
In, 15~20min of sonic oscillation, obtain coating liquid；With coating machine by above-mentioned coating liquid even spread on a glass, control film
Thickness is 0.3~0.5mm, and film moves into baking oven after terminating, and 18~20h is dried at 40~50 DEG C, film is taken off, produces a kind of corn
Core cellulose film.
Example 1
100g corncobs are taken, after being washed with deionized water only, 5h in 50 DEG C of baking oven is placed in, is placed in after taking-up in ball grinder, with
300r/min rotating speed ball milling 600min, 80 mesh sieves are crossed, obtain ball milling corncob powder；150g ball milling corncob powders are poured into
In 1000g deionized water, continue boiling 5min after being heated to boiling, filtering, obtain filter residue I；It is with mass fraction successively by filter residue I
2% sodium hydroxide solution, the hydrochloric acid solution of mass fraction 10%, the liquor natrii hypochloritis of mass fraction 5% respectively rinse 5 times, to be rinsed
After the completion of, obtain modified filter residue, in mass ratio 1:5, modified filter residue is mixed with 0.1mol/L hydrochloric acid solutions, after standing 6h, then
10min is centrifuged under 5200r/min, lower sediment is collected and rinses 3h with absolute ethyl alcohol, obtain modified filter cake, by modified filter cake
It is placed in 45 DEG C of baking oven after 4h, with 150r/min rotating speed ball milling 20min, obtains corn cob fiber element；50g PLAs are taken to pour into
Into 20mL dichloroethanes, stir to PLA all dissolving, the corn cob fiber element and 5g polyvinyl alcohol of preparation are fallen
Enter wherein, 20min is stirred with 150r/min rotating speed, is subsequently placed in 180W sonic oscillation instrument, sonic oscillation 15min, must apply
Film liquid；With coating machine by above-mentioned coating liquid even spread on a glass, it is 0.3mm to control coating thickness, and film moves after terminating
Enter baking oven, 18h is dried at 40 DEG C, film is taken off, produces a kind of corn cob fiber element film.
Example 2
110g corncobs are taken, after being washed with deionized water only, 6h in 55 DEG C of baking oven is placed in, is placed in after taking-up in ball grinder, with
310r/min rotating speed ball milling 70min, 80 mesh sieves are crossed, obtain ball milling corncob powder；175g ball milling corncob powders are poured into
In 1100g deionized water, continue boiling 6min after being heated to boiling, filtering, obtain filter residue I；It is with mass fraction successively by filter residue I
2% sodium hydroxide solution, the hydrochloric acid solution of mass fraction 10%, the liquor natrii hypochloritis of mass fraction 5% respectively rinse 6 times, to be rinsed
After the completion of, obtain modified filter residue, in mass ratio 1:5, modified filter residue is mixed with 0.1mol/L hydrochloric acid solutions, after standing 7h, then
12min is centrifuged under 5800r/min, lower sediment is collected and rinses 4h with absolute ethyl alcohol, obtain modified filter cake, by modified filter cake
It is placed in 47 DEG C of baking oven after 5h, with 155r/min rotating speed ball milling 25min, obtains corn cob fiber element；55g PLAs are taken to pour into
Into 22mL dichloroethanes, stir to PLA all dissolving, the corn cob fiber element and 7g polyvinyl alcohol of preparation are fallen
Enter wherein, 17min is stirred with 170r/min rotating speed, is subsequently placed in 200W sonic oscillation instrument, sonic oscillation 17min, must apply
Film liquid；With coating machine by above-mentioned coating liquid even spread on a glass, it is 0.4mm to control coating thickness, and film moves after terminating
Enter baking oven, 19h is dried at 45 DEG C, film is taken off, produces a kind of corn cob fiber element film.
Example 3
120g corncobs are taken, after being washed with deionized water only, 6h in 60 DEG C of baking oven is placed in, is placed in after taking-up in ball grinder, with
320r/min rotating speed ball milling 80min, 80 mesh sieves are crossed, obtain ball milling corncob powder；200g ball milling corncob powders are poured into
In 1200g deionized water, continue boiling 6min after being heated to boiling, filtering, obtain filter residue I；It is with mass fraction successively by filter residue I
2% sodium hydroxide solution, the hydrochloric acid solution of mass fraction 10%, the liquor natrii hypochloritis of mass fraction 5% respectively rinse 8 times, to be rinsed
After the completion of, obtain modified filter residue, in mass ratio 1:5, modified filter residue is mixed with 0.1mol/L hydrochloric acid solutions, after standing 8h, then
15min is centrifuged under 6000r/min, lower sediment is collected and rinses 5h with absolute ethyl alcohol, obtain modified filter cake, by modified filter cake
It is placed in 50 DEG C of baking oven after 5h, with 160r/min rotating speed ball milling 30min, obtains corn cob fiber element；60g PLAs are taken to pour into
Into 25mL dichloroethanes, stir to PLA all dissolving, the corn cob fiber element and 8g polyvinyl alcohol of preparation are fallen
Enter wherein, 15min is stirred with 1180r/min rotating speed, is subsequently placed in 220W sonic oscillation instrument, sonic oscillation 20min, must apply
Film liquid；With coating machine by above-mentioned coating liquid even spread on a glass, it is 0.5mm to control coating thickness, and film moves after terminating
Enter baking oven, 20h is dried at 50 DEG C, film is taken off, produces a kind of corn cob fiber element film.
The plastic sheeting that a kind of corn cob fiber element film being prepared into and Baoan district of Shenzhen city company are produced, specifically
Detection is as follows：
（1）Light transmission is tested
Experiment uses TV-1901 type dual-beam ultraviolet-uisible spectrophotometers, and the light transmittance of cotton film sample is carried out
Test, wave-length coverage are located at 200nm~900nm.During test, first obtained from 5 different parts of clip in circular paper substrate sample
50mm × 50mm test sample is obtained, light transmission test is carried out to the sample at this 5 positions successively, finally takes being averaged for they
Value represents the translucency of the circular sample, according to said method paper substrate cotton film and common PE plastic film sample is carried out respectively saturating
Optical property is tested, and each sample thin film is tested 5 times, is averaged.Sample size：50mm×50mm.
（2）Film degradation is tested
In laboratory, a diameter of 200mm prepared cotton film weighs successively, respectively flower deep tiling embedment 5cm
It is labelled with the sequencing of degradation time in basin, sample is taken out after 7,21,35,49d, is washed with deionized water
The impurity and soil in face, it is put into constant temperature oven drying and weighs again, during degraded, natural conditions and light that they are contacted
Essentially identical according to acting on, the relative humidity of soil is maintained at 50% or so.The calculation formula of degradation rate is：
Degradation rate=（Quality after quality-degraded before degraded）Quality × 100% before/degraded
Each sample thin film is tested 5 times, is averaged.Sample size：d = 200 mm
Specific test result such as table 1.
The corn cob fiber element film performance of table 1 characterizes
As shown in Table 1, a kind of corn cob fiber element film produced by the present invention, degradation rate and light transmittance are all significantly lifted.No
Environment can be polluted, there is very big development space.
Claims (6)
1. a kind of preparation method of corn cob fiber element film, its feature are again with preparation process：
100 ~ 120g corncobs are taken, are dried after cleaning, ball milling sieving, obtain ball milling corncob powder；
Ball milling corncob powder is poured into 1000 ~ 1200g deionized water, heat boiling, filtering, obtain filter residue I；
Filter residue I is respectively rinsed 5~8 times, after the completion of to be rinsed with sodium hydroxide solution, hydrochloric acid solution, liquor natrii hypochloritis successively,
Filter residue must be modified；
In mass ratio 1:5, modified filter residue is mixed with 0.1mol/L hydrochloric acid solutions, after standing 6~8h, then in 5200~6000r/
10~15min is centrifuged under min, lower sediment is collected and rinses 3~5h with absolute ethyl alcohol, obtain modified filter cake,
Modified filter cake is placed in baking oven and dried, ball milling, obtains Semen Maydis cellulose；
Take 50 ~ 60g PLAs to be poured into 20 ~ 25mL dichloroethanes, corn cob fiber element and the poly- second of 5 ~ 8g are poured into after stirring
Enol, ultrasonic vibration after stirring, obtains coating liquid；
By coating liquid even spread on a glass, move into baking oven and dry after film terminates, take off film, produce to obtain a kind of corncob
Cellophane.
A kind of 2. preparation method of corn cob fiber element film according to claim 1, it is characterised in that：Step（1）Institute
The mesh number for the sieving stated is 80.
A kind of 3. preparation method of corn cob fiber element film according to claim 1, it is characterised in that：Step（3）Institute
The mass fraction for the sodium hydroxide solution stated is 2%.
A kind of 4. preparation method of corn cob fiber element film according to claim 1, it is characterised in that：Step（3）Institute
The mass fraction of the liquor natrii hypochloritis stated is 5%.
A kind of 5. preparation method of corn cob fiber element film according to claim 1, it is characterised in that：Step（3）Institute
The mass fraction for the hydrochloric acid stated is 10%.
A kind of 6. preparation method of corn cob fiber element film according to claim 1, it is characterised in that：Step（6）Institute
The drying time stated is 18 ~ 20h.
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| CN201710873785.7A CN107602926A (en) | 2017-09-25 | 2017-09-25 | A kind of preparation method of corn cob fiber element film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110540741A (en) * | 2019-09-23 | 2019-12-06 | 济南圣泉集团股份有限公司 | Degradable composite material and preparation method and application thereof |
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Application publication date: 20180119 |