CN101314925B - Method of producing stalk composite fiber material for road - Google Patents
Method of producing stalk composite fiber material for road Download PDFInfo
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- CN101314925B CN101314925B CN2008100473885A CN200810047388A CN101314925B CN 101314925 B CN101314925 B CN 101314925B CN 2008100473885 A CN2008100473885 A CN 2008100473885A CN 200810047388 A CN200810047388 A CN 200810047388A CN 101314925 B CN101314925 B CN 101314925B
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Abstract
The invention relates to a method for preparing a road used composite straw fibrous material. The preparation method comprises the steps as follows: pulverizing; alkalizing and stewing plant straw to obtain fibrous pulp; mixing the fibrous pulp with bentonite and milling; conducting sodium treatment, chemical modification and purification to obtain modified composite bentonite pulp; separating, drying, etc., to prepare the composite fibrous material. The road used composite straw fibrous material prepared by adopting the method is adopted as an additive and applied in a bituminous mixture, so as to increase the capacity of a bituminous pavement to bear heavy load, prolong endurance life and service life of the pavement. The preparation method adopts the straw and the bentonite as the raw materials, has the characteristics of wide material source, simple process, high utilization rate of resources, low cost, no pollution, etc, eliminates the shortcomings that the existing fibrous material adopts the used newspapers as the raw materials and the printing ink on the newspapers is difficult to be removed completely, solves the problem of unstable properties of mixed materials, and adopts wood as the raw material, thereby increasing the expense of raw materials and reducing production cost.
Description
Technical field
The present invention relates to a kind of preparation method of stalk composite fiber material for road, especially to the extracting method of stalk fibre classified resourceization.
Background technology
Sustained and rapid development along with national economy, modern road traffic is to the development of the aspect of high speed, heavy duty, heavy traffic and traffic channelling, this serviceability to the asphalt concrete pavement that highway generally adopts is had higher requirement, start with from structure, material, technology and to solve the road surface and damage problem in early days, form the build technology on China heavy traffic asphaltum road surface, guarantee the function of use of road surface in service life, reduce the life cycle cost of highway, strive reaching 10-20 the service life on road surface.
It is the direct reflection of pavement structure mechanical behavior under environment (stress-temperature-hydraulic) acting in conjunction that the pavement structure body destroys, how to increase the ability of asphalt concrete pavement opposing local function, improve fatigue life, prolong road surface service life, the performance that improves asphalt is the important topic that asphalt pavement material is selected under the present heavily loaded transportation condition, structural design faced.Have aspect three improving the research of mainly carrying out on the pavement performance of asphalt: be the anti-deforming ability that the grating of improving the mineral compound improves asphalt on the one hand, as pitch code hoof fat crushed stones (SMA) structure, many rubbles (SMA) structure, big particle diameter bituminous concrete (LSMA) etc.; Be to improve the cohesive strength that the asphalt performance quality improves asphalt on the other hand, strengthen the opposing permanent deformation and reduce response to temperature, as the SBS modified pitch, SBR modified pitch, PE modified pitch etc.; The 3rd important research direction is to add fiber and steel bar reinforced material to improve its whole physical and mechanical property in asphalt.Mixing fiber in asphalt becomes a kind of new tool that improves performance of asphalt mixture, is subjected to paying close attention to widely and paying attention to.After fiber is admixed asphalt, need not heavy mechanical equipment and complicated construction technology during construction, thereby can be applied to the different aspect of road engineering, as reinforcing, repairing and dead-end fracture.And, bring into play its different useful effect for the pavement structure under the varying environment, and also can obviously not increase the difficulty of construction on road surface, these advantages all are that other reinforcement means is incomparable.
The fiber of admixture mainly contains lignin fibre, mineral fibres and organic synthetic fibers in bituminous paving at present, and wherein the use of lignin fibre is the most general, is organic synthetic fibers and mineral fibres secondly.About lignin fibre, owing to considering cost and technology processing reason, domestic manufacturer all selects for use waste paper as raw material, also has a lot of producers to adopt waste paper to make raw material abroad, wherein the subject matter of Cun Zaiing: the raw materials quality instability.Because the difference of waste paper is very big, periodical is arranged, magazine, newspaper, copy paper or the like, wherein some paper has reclaimed and had used.When sampling was inspected by ready samples, producer can select and recommend the fiber product that processes by than high-quality waste paper, can satisfy code requirement fully.But when using in actual production, because the unstability of raw material causes unstable product quality.And waste paper printing ink is difficult to take off to the greatest extent, directly influences the oil absorbency of fiber.Although external relevant producer begins to carry out the production of wood fibre with timber as raw material, improve the quality of wood fibre, its price is expensive, causes the waste resource.
Summary of the invention
At above-mentioned existing problems, the object of the present invention is to provide a kind of preparation method of stalk composite fiber material for road.
For achieving the above object, technical scheme of the present invention is: a kind of preparation method of stalk composite fiber material for road, and preparation flow is:
The a straw forms fiber pulp through pulverizing, alkalization, boiling,
The b bentonite forms the modified alta-mud slurry through levigate, sodium, chemical modification, purification,
C mixes fiber pulp with the modified alta-mud slurry, add coupling agent and form emulsion after separating, and drying obtains complex fiber material again.
Straw employing concentration after the pulverizing is that the NaOH alkaline solution of 0.08mol/L～0.15mol/L soaks the fiber pulp that obtains after the also boiling.The modified alta-mud slurry is meant that bentonite obtains after sodium and chemical modification.Bentonitic sodium be meant bentonite through levigate, immersion in NaOH solution, making beating, centrifugally mix and stir, processed.The chemical modification of sodium-ionized bentonite be meant sodium-ionized bentonite by add quality for its bromine cetyl trimethylammonium of 20%～30% carry out chemical modification after, and adopt diesel oil to purify.What mixed pulp was meant fiber pulp and modified alta-mud slurry is 10～6 by mass ratio: 1 mixes.Separate and to be meant that adopting rotating speed is that the centrifuge of 1000r/min～4000r/min filters out the close fiber with modified alta-mud of length between 1～1.5mm.Emulsion is meant that the fiber of mixed pulp after separate purifying adds silane coupler and water forms, silane coupler with separate after fiber quality dry weight ratio be 1～5: 1000.
Owing to adopted above technical scheme, the preparation method of stalk composite fiber material of the present invention has the following advantages:
(1) raw material (stalk and bentonite) that adopts of the present invention come that source range is wide, preparation technology is simple, pollution-free, be easy to suitability for industrialized production;
(2) on material is selected, China will produce 700,000,000 tons of all kinds of crop materials every year at present, wherein has an appointment 40% effectively to be handled and utilize.Not only wasted resource, but also because the open incineration of stalk causes the generation of serious atmosphere pollution, fire and traffic accident.The processing of stalk is one of main resource environment problem of facing of China rural area with utilizing, and adopts the raw material of stalk as the preparation road fiber, realizes the recycling of refuse;
(3) the present invention adopts straw as raw material, has abandoned current fibrous material and has adopted disregard message paper printing ink to be difficult to take off most shortcoming, has solved the mixture performance instability; And adopt timber to increase raw-material expense as raw material, reduced production cost;
(4) it is low that complex fiber material of the present invention has the construction temperature requirement, has bigger specific surface, is easy to and base material (concrete or rubble) mix, improved oil absorbency.
Description of drawings
Accompanying drawing is complex fiber material preparation method's of the present invention flow chart.
The specific embodiment
Below in conjunction with accompanying drawing a kind of complex fiber material preparation method of the present invention is done further detailed the description, its preparation method is seen accompanying drawing.
This preparation method's enforcement is earlier stalk and bentonite to be carried out processing in early stage, and it is compound afterwards the two to be carried out the later stage, that is:
(1) early stage of stalk, processing was divided into following steps: 1. get the raw materials ready, straw (straw, cornstalk, wheat straw, cotton stalk etc.) is screened, cleans and keeps certain humidity, and stalk is cut into the preservation (storage time should not above 7 days) of preserving moisture of length about 100mm; 2. pulverize, straw is machined to rough fiber with fiber; 3. alkalization, it is that 0.08%～0.15% NaOH solution soaked 3～4 hours that rough fiber is placed concentration, afterwards the crude fibre that soaks is moved out to rinse bath, blasts CO simultaneously
2So that residual NaOH solution is regulated pH=6.4～7.6 in the neutralized crude fiber; 4. boiling places boiling under 1～4 atmospheric pressure with the crude fibre that cleans up; 5. slurrying places fiberizer to grind the crude fibre after the boiling and makes the fine fibre slurry;
(2) bentonitic processing in early stage is divided into following steps: 1. get the raw materials ready, bentonite is carried out cleaning-drying, remove perishable impurity; 2. levigate, place grinding machine for grinding to become molecule bentonite; 3. slurrying, adopting the screening mode to select particle diameter is after particle between 0.01～0.1mm places NaOH solution to soak more than 10 hours, use beater to make into slurries, and guarantee that slurries are easy to flow, use the above centrifuge of 3000r/min to stir slurries 20～30min, obtain sodium-ionized bentonite through dewatering, purifying again.4. chemical modification, the quality of the bromine cetyl trimethylammonium (abbreviating CTMB as) of interpolation is that 20%～30% pair of sodium-ionized bentonite of sodium-ionized bentonite carries out the chemical reaction modification.5. purify, the bentonite employing diesel oil of chemical modification is purified.6. the modified alta-mud slurry adds water, and make into slurries in beater in the modified alta-mud that purification is come out, and makes it moisture content 150%～200%.
(3) mixed pulp is starched according to stirring in mass ratio 10: 150～300 adding agitators handled the fiber pulp and the modified alta-mud that obtain by (1) and (2).
(4) separate, behind the stirring 30～40min of mixed pulp elder generation, stir towards a direction again, (mixed pulp is centrifugal separating in the sieves of different sieve apertures to adopt the centrifuge screening this moment, centrifuge speed is controlled at the fiber of 1000r/min～4000r/min), extracts the fiber of fibre length between 1～1.5mm.
(5) make emulsion after the fiber that extracts is added silane coupler and water, and uniform mixing, the silane coupler of employing with separate after fiber quality dry weight ratio be 1～5: 1000, add the water that proposes 10 times of back fiber qualities simultaneously.
(6) will add coupling agent fiber emulsion stir and adopt under 110 ℃～130 ℃ temperature and dehydrate, just obtain the road complex fiber material this moment.
Example 1: utilize maize straw to make complex fiber material, the steps include:
(1) selects not have the maize straw that rots, with its defoliation, remove fringe, go to clean behind the root and remove its surface contaminants, and soaked one hour, take out then stalk is cut into about 100mm, under the situation of its humidity of maintenance, store for future use.
(2) utilize the fiber process machine that the stalk that stores is processed into rough fiber.
(3) crude fibre being placed concentration is that the NaOH solution of 0.08mol/L～0.15mol/L soaked 3～4 hours, afterwards the crude fibre that soaks is moved out to rinse bath, blasts CO in rinse bath
2And pH value to 6.4～7.6 of mensuration rinse bath.
(4) crude fibre that will regulate the pH value carried out boiling 310 minutes, and the boiling composition consists of maize straw crude fibre, NaOH solution, Na
2S9H
2The ratio of the weight of O, water is 10: 4: 1: 100, and utilize the fiber machine to make the fine fibre slurries.
(5) bentonite is carried out cleaning-drying, remove perishable impurity, oven dry, and grinding machine for grinding becomes molecule again.
(6) selecting particle diameter with screening is after particle between 0.01～0.1mm places NaOH solution to soak more than 10 hours, use mixer to mix and stir into slurries, and guarantee that slurries are easy to flow, use the above centrifuge of 3000r/min to stir slurries 20～30min, obtain sodium-ionized bentonite through dewatering, purifying again.
(7) get sodium-ionized bentonite, add entry and make slurries.20%～30% the bromine cetyl trimethylammonium (abbreviating CTMB as) that adds quality and be sodium-ionized bentonite in slurries carries out the chemical reaction modification to sodium-ionized bentonite.
(8 adopt the bentonite of diesel oil purification by liquid extraction through (7) chemical modification.In the modified alta-mud that purification is come out, add water, and in beater, make into moisture content, and constantly stir, with standby at 150%～200% slurries.
(9) crude fibre after will handling make pH be 7.6 slurries and with (8) in modified alta-mud slurry of preparation evenly mix and stir, get 10Kg fiber pulp and 1Kg modified alta-mud slurry, stir towards a direction again after promptly fiber, bentonitic mixed pulp being stirred 30min earlier, and (mixed pulp is centrifugal separating in the sieves of different sieve apertures to adopt the centrifuge screening, centrifuge speed is controlled at 2000r/min, extracts the fiber that be adsorbed with modified alta-mud of fibre length between 1～1.5mm.
(10) with the fiber 4.5Kg of length between 1～1.5mm that extracts, add water 45kg water and silane coupler 4.5g makes emulsion, mixed and stirred 10 minutes.Carry out controlling 110 ℃ of oven dry down of temperature again after the processed for mixed liquor, just obtained the composite road fibrous material.
Example 2: utilize rice straw to make complex fiber material, the steps include:
(1) selects not have the rice straw that rots, with its defoliation, remove fringe, go to clean behind the root and remove its surface contaminants, and soaked one hour, take out then stalk is cut into about 100mm, under the situation of its humidity of maintenance, store for future use.
(2) utilize the fiber process machine that the stalk that stores is processed into rough fiber.
(3) crude fibre being placed concentration is that the NaOH solution of 0.12mol/L soaked 3 hours, afterwards the crude fibre that soaks is moved out to rinse bath, blasts CO in rinse bath
2And the pH value to 7.6 of mensuration rinse bath.
(4) crude fibre that will regulate the pH value carried out boiling 10 minutes, and the boiling composition consists of rice straw crude fibre, NaOH solution, Na
2S9H
2The weight ratio of O, water 10: 4: 1: 200, and utilize the fiber machine to make the fine fibre slurry.
(5) bentonite is carried out cleaning-drying, remove perishable impurity, oven dry, and grinding machine for grinding becomes molecule again.
(6) selecting particle diameter with screening is after particle between 0.01～0.1mm places NaOH solution to soak more than 10 hours, use mixer to mix and stir into slurries, and guarantee that slurries are easy to flow, use the above centrifuge of 3000r/min to stir slurries 20～30min, obtain sodium-ionized bentonite through dewatering, purifying again.
(7) get sodium-ionized bentonite, add entry and make slurries.20%～30% the bromine cetyl trimethylammonium (abbreviating CTMB as) that adds quality and be sodium-ionized bentonite in slurries carries out the chemical reaction modification to sodium-ionized bentonite.
(8) adopt diesel oil to purify through the bentonite of (7) chemical modification.In the modified alta-mud that purification is come out, add water, and in beater, make into moisture content, and constantly stir, make the modified alta-mud slurry at 150%～200% slurries.
(9) crude fibre after will handling make pH be 8.0 slurries and with (8) in modified alta-mud slurry of preparation evenly mix and stir, get 6Kg fiber pulp and 1Kg modified alta-mud slurry, stir towards a direction again after promptly fiber, bentonitic mixed pulp being stirred 30～40min earlier, and (mixed pulp is centrifugal separating in the sieves of different sieve apertures to adopt the centrifuge screening, centrifuge speed is controlled at 4000r/min, extracts the fiber that be adsorbed with modified alta-mud of fibre length between 1～1.5mm.
(10) with the fiber 4.5Kg of length between 1～1.5mm that extracts, add water 45kg water and silane coupler 22.5g makes emulsion, mixed and stirred 10 minutes.Carry out controlling 130 ℃ of oven dry down of temperature again after the processed for mixed liquor, just obtained the composite road fibrous material.
Claims (6)
1. the preparation method of a stalk composite fiber material for road, it is characterized in that: the preparation flow of complex fiber material is:
The a straw forms fiber pulp through pulverizing, alkalization, boiling,
The b bentonite is through levigate, sodium, the bentonite after the sodium by add quality for its bromine cetyl trimethylammonium of 20%～30% carry out chemical modification after, and adopt diesel oil to purify, purifying forms the modified alta-mud slurry,
C mixes fiber pulp with the modified alta-mud slurry, add coupling agent and form emulsion after separating, and drying obtains complex fiber material again.
2. the preparation method of a kind of stalk composite fiber material for road as claimed in claim 1 is characterized in that: fiber pulp be meant the straw after the pulverizing adopt concentration be the NaOH alkaline solution of 0.08mol/L～0.15mol/L soak and boiling after obtain.
3. the preparation method of a kind of stalk composite fiber material for road as claimed in claim 1 is characterized in that: bentonitic sodium be meant bentonite through levigate, immersion in NaOH solution, making beating, centrifugally mix and stir, processed.
4. the preparation method of a kind of stalk composite fiber material for road as claimed in claim 1 is characterized in that: fiber pulp is 10～6 with the modified alta-mud slurry by mass ratio: 1 mixes.
5. the preparation method of a kind of stalk composite fiber material for road as claimed in claim 1 is characterized in that: separate being meant that adopting rotating speed is that the centrifuge of 1000r/min～4000r/min filters out the close fiber with modified alta-mud of length between 1～1.5mm.
6. the preparation method of a kind of stalk composite fiber material for road as claimed in claim 1, it is characterized in that: emulsion is meant that the fiber of mixed pulp after separate purifying adds silane coupler and water forms, silane coupler with separate after fiber quality dry weight ratio be 1～5: 1000.
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| CN101314925B true CN101314925B (en) | 2011-04-20 |
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| CN103833274B (en) * | 2013-12-31 | 2016-01-13 | 中国科学院武汉岩土力学研究所 | A kind of heavy metal contamination soil consolidator and using method thereof |
| JP6698658B2 (en) * | 2015-08-04 | 2020-05-27 | 株式会社クラレ | Carbon precursor derived from plant material |
| CN108249823B (en) * | 2018-02-10 | 2020-07-10 | 华北水利水电大学 | Nano-alumina modified asphalt mixture doped with straw composite fibers and preparation method thereof |
| CN114133587A (en) * | 2021-12-17 | 2022-03-04 | 山东交通学院 | Modified straw fiber and preparation method thereof, asphalt mucilage prepared from modified straw fiber and preparation method of asphalt mucilage |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87106213A (en) * | 1986-09-09 | 1988-03-23 | 纳幕尔杜邦公司 | Fill composition and the application in wood fiber paper is made thereof |
| US4753710A (en) * | 1986-01-29 | 1988-06-28 | Allied Colloids Limited | Production of paper and paperboard |
| US5266538A (en) * | 1990-12-21 | 1993-11-30 | Southern Clay Products, Inc. | Method for preparing high solids bentonite slurries |
| CN1213421A (en) * | 1996-03-08 | 1999-04-07 | 联合胶体有限公司 | Clay compositions and their used in paper making |
| CN1238019A (en) * | 1996-11-19 | 1999-12-08 | 西巴特殊化学水处理有限公司 | Manufacture of paper |
| CN1345997A (en) * | 2000-09-24 | 2002-04-24 | 许绍良 | Treating method for converting waste liquid produced in paper-making process into usable resource. |
-
2008
- 2008-04-18 CN CN2008100473885A patent/CN101314925B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4753710A (en) * | 1986-01-29 | 1988-06-28 | Allied Colloids Limited | Production of paper and paperboard |
| CN87106213A (en) * | 1986-09-09 | 1988-03-23 | 纳幕尔杜邦公司 | Fill composition and the application in wood fiber paper is made thereof |
| US5266538A (en) * | 1990-12-21 | 1993-11-30 | Southern Clay Products, Inc. | Method for preparing high solids bentonite slurries |
| CN1213421A (en) * | 1996-03-08 | 1999-04-07 | 联合胶体有限公司 | Clay compositions and their used in paper making |
| CN1238019A (en) * | 1996-11-19 | 1999-12-08 | 西巴特殊化学水处理有限公司 | Manufacture of paper |
| CN1345997A (en) * | 2000-09-24 | 2002-04-24 | 许绍良 | Treating method for converting waste liquid produced in paper-making process into usable resource. |
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