CN1142338C - Water-soluble staltic cellulose fibre and its preparing process - Google Patents
Water-soluble staltic cellulose fibre and its preparing process Download PDFInfo
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- CN1142338C CN1142338C CNB991192532A CN99119253A CN1142338C CN 1142338 C CN1142338 C CN 1142338C CN B991192532 A CNB991192532 A CN B991192532A CN 99119253 A CN99119253 A CN 99119253A CN 1142338 C CN1142338 C CN 1142338C
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Abstract
The present invention relates to a water soluble stanch cellulose fiber and a production method thereof. The porosity of the water soluble stanch cellulose fiber is from 60 to 99%, and the roughness is from 15 mum to 20 mum. The production method comprises the following steps: activating a fiber with a sodium hydroxide water solution; etherifying the fiber with a halogenated alkyl acid reaction liquid; neutralizing the fiber with a hydrochloric acid for controlling the pH value to 6.5 to 7.5; washing the fiber with an ethanol water solution till the salt content is less than or equal to 3%; carrying out solid-liquid separation; drying, carding and opening the fiber. The fiber produced by the method has the advantages of large specific surface, large porosity, wide application, simple technology, less investment, and low cost of the products, and has better stanching effect than that of water soluble fabrics.
Description
One, technical field
The present invention relates to a kind of water-soluble staltic cellulose fibre and manufacture method thereof, is raw material with viscose or textile fiber more precisely, carries out becoming a kind of water-soluble cellulose fibre after the processed through method of the present invention.
Water-soluble high-molecular material can be widely used in every field according to the form of its molecular structure and final products.For example Powdered fiber derivative water-soluble material can be used as weaving thickener, medicine disintegrant, oil refining auxiliary agent, food additives etc.The textile-like fiber can be used as medical styptic, and especially textile-like cellulose derivative haemostatic effect is more excellent, can be absorbed by the person.
Two, background technology
Chinese patent literature CN1035803C has introduced a kind of soluble hemostyptic fabric, it is after the textile gauze of degreasing is handled 2-3 hour with the alkali metal hydroxide reactant liquor, handled the pure continuous gauze 6-10 of degreasing hour that handled through alkali metal hydrogen-oxygen thing reactant liquor with a halogenated acetic acids reactant liquor again, regulate the PH to 6.5-7.5 of the textile gauze of handling through a halogenated acetic acids with the ethanol of 75-85% and hydrochloric acid, last wash textile gauze with the ethanol of 75-85% again, below 1%, form soluble hemostyptic fabric until NaCl content.
Another piece Chinese patent literature CN1143697A has introduced preparation soluble cellulose fabric and manufacture method thereof, at first used for textiles alkali metal hydroxide reactant liquor is handled 1-1.5 hour, and bath raio is 1: 5; Handled textiles 4-4.5 hour that handled through alkali metal hydrogen-oxygen thing reactant liquor with a halogenated acetic acids reactant liquor, bath raio is 1: 2.5 again; The back makes its PH to 6.5-7.5 with in the hydrochloric acid and through the textiles that a halogenated acetic acids reactant liquor was handled; Purify the textiles that transfers to PH6.5-7.5 with 75% ethanol at last, below 1%, form the soluble hemostyptic cellulose fabric until salt content.
But the above-mentioned soluble hemostyptic cellulose fabric that is used to stop blooding generally can only be used for the hemostasis of the planar shaped surface of a wound, is used for very inconvenience of cavity type filling.In addition, fiber is after weaving, twist, weaving, and porosity significantly reduces between the fiber, and the chemical graft sex change is also very difficult, influences the physics haemostatic effect again, and its process is long, and cost up is restricted in the use.Water-soluble fibre can be as styptics such as spherical, sheet, column, plug shapes, and can be used for plane, the hemostasis of the cavity type surface of a wound.The manufacturing of the water-soluble fibre of wet spinning, higher to ingredient requirement, the equipment investment costliness, area of mill site is big.
Three, summary of the invention
The objective of the invention is to develop a kind of water-soluble staltic cellulose fibre, make its porosity height, roughness is big, and haemostatic effect is good.
Another object of the present invention just is to work out a kind of manufacture method of new water-soluble staltic cellulose fibre, makes its technology simple, small investment, and the anthemorrhagic performance of product is better, and product cost is low.
The present invention is a raw material with viscose glue or textile fiber, utilizes active hydroxyl and halogenated acid on the fiber molecule to carry out etherification reaction generation water-soluble cellulose ether.
A kind of water-soluble staltic cellulose fibre, with pretreated viscose or pretreated textile fiber is raw material, raw material and NaOH reactant aqueous solution are activated, again with containing ethanol, wherein a kind of alcohol of propyl alcohol or acetone or 1: 1 acetone of volume ratio and methyl alcohol, all the other are for after the monochloracetic acid mixed liquor of water carries out etherificate as reactant liquor, with in the hydrochloric acid and etherificate after fiber, wash with ethanol water again, carry out Separation of Solid and Liquid, oven dry forms, the porosity of this water-soluble staltic cellulose fibre is greater than between the 60-99%, and roughness is greater than 15 μ m-20 μ m.
The manufacture method of a kind of water-soluble staltic cellulose fibre of the present invention comprises:
A, be raw material with pretreated viscose or pretreated textile fiber, raw material is placed the reactor of reactant liquor do action, raw material was handled 1-2 hour as reactant liquor with the sodium hydrate aqueous solution of percetage by weight 10-50%, activate; bath raio 1: 5.1-20
B, handle after the activation among a raw material 5.6-8 hour; bath raio is 1: 2.5; carry out etherificate; the reactant liquor of a said haloalkyl acid is the monochloracetic acid reactant liquor; the monochloracetic acid reactant liquor is for containing wherein a kind of alcohol of ethanol, propyl alcohol or acetone or 1: 1 acetone of volume ratio and methyl alcohol; all the other are the mixed liquor of the monochloracetic acid of water with a haloalkyl acid reaction liquid
C, with in the hydrochloric acid and the fiber among the b, be 6.5-7.5 until PH.
D, with the fiber among the ethanol water of the 60-74% washing c, until salt content be smaller or equal to 3% after, carry out liquid-solid separation, tell fiber, dry again, carry out combing, shredding at last.
If with textile fiber is raw material,, textile fiber is carried out the degreasing preliminary treatment with the method that the technical staff under this area all knows; If with the viscose is that raw material is that method is carried out preliminary treatment to it described in 90104824.0 by the patent No. then, PH9-10.5 at room temperature specifically, with 1-4 restrain effective chlorine/liter the liquor natrii hypochloritis handled viscose 40-60 minute, the solution of draining then, water washs, again in 95-100 ℃, under the condition of PH9-10.5, with the aqueous hydrogen peroxide solution of 0.3% percetage by weight and few stable agent for example sodium pyrophosphate handle the viscose of handling through the liquor natrii hypochloritis, for example sodium pyrophosphate solution time of handling is 50-70 minute with aqueous hydrogen peroxide solution and few stable agent, the aqueous hydrogen peroxide solution of draining then, water washs until no clorox and exists, as raw material.
, under 10-50 ℃ temperature, handle raw material and activate as reactant liquor with the sodium hydrate aqueous solution of percetage by weight 10-50%.But, handled raw material 1-2 hour with the mixed liquor of the ethanol liquid of the sodium hydrate aqueous solution of percetage by weight 25-50% and 95% as reactant liquor again, activate, the volume ratio of the sodium hydrate aqueous solution of 25-50% and 95% ethanol liquid is 1: 1.
When handling raw material after the activation, under the temperature of room temperature-75 ℃, to carry out etherificate for well with the monochloracetic acid reactant liquor.Said room temperature is 18-25 ℃, it is to contain ethanol, propyl alcohol a kind of alcohol or acetone or 1: 1 acetone of volume ratio and methyl alcohol wherein that the reactant liquor of acid is spent on one chloro second border, all the other are the mixed liquor of water, be the monochloracetic acid that contains the percentage by volume of 15-40% with the monochloracetic acid reactant liquor again, the ethanol of 20-50% percentage by volume, the propyl alcohol a kind of alcohol wherein or 1: 1 the acetone of volume ratio and the methyl alcohol of acetone or 20-50% percentage by volume, all the other are good for the mixed liquor of water.
Using in the hydrochloric acid after the etherificate and the fiber in the solution after the etherificate, is 6.5-7.5 until making PH.The concentration of used hydrochloric acid is unrestricted, can also use watery hydrochloric acid with concentrated hydrochloric acid, and it is that the aqueous hydrochloric acid solution of 10-20% neutralizes and is advisable that general usefulness contains the hydrogen chloride percetage by weight.
Fiber is washed with the ethanol water of 60-74% with in the hydrochloric acid and back, until salt content smaller or equal to 3%, percetage by weight.Again to wash to salt content smaller or equal to 3% to 1.1% to well.Fiber after the ethanol water washing of 60-74% carries out liquid-solid separation, and the fiber of telling is dried under＜120 ℃-60 ℃ temperature in drying room formula drying machine, and combing is carried out in the oven dry back on cotton comb, carries out shredding and handle on opener.
Produce water-soluble staltic cellulose fibre with said method.
Porosity, the roughness of materials such as water-soluble hemostatic textile, water-soluble staltic cellulose fibre are relevant with anthemorrhagic performance.Because these water soluble hemostatic materials are polyelectrolyte, its course of dissolution divides suction, swelling, three stages of dissolving, so dissolution time is longer.Suction and swelling time are subjected to the influence of material porosity and surface roughness.The porosity of water-soluble hemostatic textile is between 35-60%, and roughness is between 3-15 μ m.The porosity of water-soluble staltic cellulose fibre is between greater than 60%-99%, and roughness is between greater than 15-20 μ m.
Aperture and porosity are the indexs that shows material inner surface size, and aperture and porosity are big more, and the material inner surface is big more.Roughness is the index that shows that outer surface is long-pending, and its numerical value is big more, and external surface area is big more.
Clotting factor and blood platelet are the principal elements that influences haemostatic effect, both be adsorbed in material surface what will directly influence the quality of haemostatic effect.
During the material adsorptive liquid, the relation of porosity and liquid absorption is as follows:
Kwm is the limit liquid storage amount of material in the formula.
δ F is the volume weight of material.
ε is the porosity of material.
As seen, limit liquid storage amount and volume weight are inversely proportional to from above-mentioned formula (1), are directly proportional with porosity.Weight is light more, and the hemostatic material that porosity is big more is beneficial to absorption clotting factor, blood platelet more, is beneficial to hemostasis more.
The material surface roughness influences liquid wetting to material.According to the Wen Zeer equation, the relation of roughness and angle of wetting is as follows:
In the formula: δ is a roughness factor.
γ
SABe solid, gas meter surface tension.
γ
SLBe the solid, liquid surface tension
γ
LABe liquid, gas meter surface tension
θ " is the rough surface contact angle.
θ ' is the smooth surface contact angle.
As seen, under the constant situation of other factors, roughness factor is big more from formula (2), and contact angle is more little, and is easy more wetting.So the hemostatic material surface roughness is big more, easy more wetting by blood, and then with its absorption.This point is also confirmed by the test result.It is about 10% that platelet adhesion rate increases, and whole blood viscosity increases about 5%.And when porosity＜35%, during roughness＜1 μ m, material mainly by poly-ly so absorb water, the expansion hemostasis by compression.
The advantage of a kind of water-soluble staltic cellulose fibre of the present invention and manufacture method thereof just is:
1, a kind of water-soluble staltic cellulose fibre of the present invention, its porosity are greater than between the 60-99%, and roughness is greater than 15 μ m-20 μ m.
2, because method of the present invention is made raw material with pretreated viscose or pretreated textile fiber, increased roughness, surface physical characteristics such as porosity have been improved, improved the physics anthemorrhagic performance, so not only improve haemostatic effect and saved the weaving operation again, reduced the cost of product.When material of the present invention is used to stop blooding, compare with the textile-like water soluble hemostatic material, because of its specific area and porosity greater than the textile-like water soluble hemostatic material, the effect in physical absorption stage is greater than the textile-like water soluble hemostatic material.The porosity measurement data show: fibrefill is bigger more than 30% than common hospital gauze porosity.Aperture, porosity, thrombin time, platelet adhesion rate, whole blood be low cuts the viscosity test result and show: degenerative condition is close, the material that the surface physics state is different, its anthemorrhagic performance is also different, increase along with porosity, thrombin time reduces, the platelet adhesion reaction amount increases, and makes the haemostatic effect of the water-soluble staltic cellulose fibre that method of the present invention makes better than water-soluble fabric.
3, because the material that has method of the present invention to make is a cellulose fibre, be easy to be processed into shape in each, for example spherical (as the hemostasis ball), sheet, plug shape, column, mould shape, cushion, capsule, bag shape etc., not only can be used for the plane surface of a wound, also can be used for the cavity-like surface of a wound, also can with multilayer material and medicine compound make multi-functional dressing or paste bleeding-stopping dressing be used for medical treatment, family's hemostasis, military first aid or burn and protect wound.
4, the material applications made from method of the present invention is extensive, can make medicine or cosmetics carrier, packaging material.During as pharmaceutical carrier, because of the many adsorbances of hole are big, good biocompatibility, degradable easily absorbs, the efficient height, side reaction is little.The material made from method of the present invention is during as packaging material, and solubilized is easy to handle discarded object, and is not only easy to use, and helps environmental protection; The material made from method of the present invention can be made into nonwoven fabric, also can be made into promptly abandoning clothing.
For example, the material made from method of the present invention can be made into the Orally taken hemostatic agent.The water-soluble staltic cellulose fibre that the inventive method is made is ground into powdery, incapsulates or directly be pressed into tablet, can be used for alimentary canals hemostasis such as esophagus or stomach after oral.
Having is to can be made into water-soluble facial mask with the material that method of the present invention is made again, with the water-soluble staltic cellulose fibre combing and make nonwoven fabric 10 * 10cm
2, will dissolve in solvent again and stable under dry state, hygrometric state under activity bigger, can be dissolved in 75% the ethanol by the cosmetics of skin absorbs again, form cosmetic solution, above-mentioned nonwoven fabric was dipped in the cosmetic solution 30 minutes, extrude excessive moisture, dry, obtain being loaded with the nonwoven fabric of cosmetics, after face thoroughly cleans, be affixed on face with it, and spray is with a small amount of distilled water, cosmetics in the nonwoven fabric are activated, and with facial driving fit, then nutritional labeling is very fast by skin absorbs.
Be to make the water soluble package bag in addition with the material that method of the present invention is made.Water-soluble staltic cellulose fibre is made nonwoven fabric 3 * 8cm
2, the back doubling of opposite side water spray was scalded 2 minutes in 90 ℃ of pressures, and the condiment for instant noodles of packing into will remain material mouthful limit water spray, pressure seal mouth again.During the instant face, can directly seasoning bag be dropped in the soup, need not to seal off.This method can be used for the preparation of the stronger industrial chemicals of contaminative, for example dissolving of dyestuff equally.
5, method technology of the present invention is simple, and plant area is little, small investment, and product cost is low.
Five, the specific embodiment
Below with embodiment product of the present invention and method are further described; to help product of the present invention, method and advantage thereof are done further to understand; protection scope of the present invention is not subjected to the restriction of these embodiment, and protection scope of the present invention is decided by claim.
Embodiment 1
Its porosity of the water-soluble staltic cellulose fibre of present embodiment is 85%, and roughness is 17 μ m.
A carries out ungrease treatment to textile fiber, with pretreated textile fiber is raw material, and raw material is placed the reactor of reactant liquor do action, handles 2 hours in 50 ℃ as reactant liquor with the sodium hydrate aqueous solution of percetage by weight 10%, activate bath raio 1: 5.5.
Raw material after the activation among b, the usefulness monochloracetic acid reactant liquor processing a 8 hours; bath raio is 1: 2.5, carries out etherificate in room temperature, contains the monochloracetic acid of 40% percentage by volume in the reactant liquor of said monochloracetic acid; the acetone of 50% percentage by volume, and all the other are water.
Being in 15% the hydrochloric acid and the fiber among the b with containing the hydrogen chloride percetage by weight after c, the etherificate, is 6.5 until PH.
D, with in the hydrochloric acid and after, with 70% ethanol water fiber is washed again, be 2.7% percetage by weight until salt content.Carry out Separation of Solid and Liquid with centrifugal process, isolate fiber, dry under 110 ℃ temperature in room formula drying machine, combing is carried out in the oven dry back on cotton comb, carries out shredding and handle on opener.Its porosity of water-soluble staltic cellulose fibre that generates is 85%, and roughness is 17 μ m.
Embodiment 2
Its porosity of the water-soluble staltic cellulose fibre of present embodiment is 90%, and roughness is 18 μ m.
Used in the present embodiment establish each and process conditions are substantially identical with embodiment 1, only different is, with pretreated viscose as raw material.Its pretreated method is, is that method in 90104824.0 is carried out by the patent No..At room temperature in PH9.5, with 2.5 gram effective chlorine/liter the liquor natrii hypochloritis handled viscose 50 minutes, the solution of draining then, water washs; Again in 98 ℃, handled the viscose handled through the liquor natrii hypochloritis 60 minutes with the aqueous hydrogen peroxide solution of 0.3% percetage by weight and a small amount of pyrophosphoric acid under the condition of PH9.5, water-soluble Huaihe River of hydrogen peroxide of draining then, water washs the existence until no clorox, as raw material.Its porosity is 90%, and roughness is 18 μ m.
Embodiment 3
Its porosity of the water-soluble staltic cellulose fibre of present embodiment is 92%, and roughness is 18.5 μ m.
A with pretreated textile fiber as raw material, raw material is placed reactant liquor do action reactor, with raw material with the mixed liquor of the ethanol liquid of 50% sodium hydrate aqueous solution and 95% as reactant liquor, handle in 40 ℃ and to activate in 1.5 hours; bath raio is 1: 6, the volume ratio of 50% sodium hydrate aqueous solution and 95% ethanol liquid is 1: 1.
B uses the raw material of monochloracetic acid reactant liquor after 35 ℃ of activation of handling among a 6.2 hours, and bath raio 1: 2.5 is carried out etherificate.The monochloracetic acid that contains 15% percentage by volume in the said monochloracetic acid reactant liquor, the ethanol of 35% percentage by volume, all the other are water.
Being in 20% the hydrochloric acid and the fiber among the b with containing the hydrogen chloride percetage by weight after the c etherificate, is 7.0 until making its PH.
D with in the hydrochloric acid and after, with 65% ethanol water fiber is washed again, until salt content is 1.1% percetage by weight, carry out Separation of Solid and Liquid with centrifugal process, isolate fiber, in room formula drying machine, under 90 ℃ temperature, dry, through on cotton comb, carrying out combing, on opener, carry out shredding and handle after the oven dry.Its porosity is 92%, and roughness is 18.5 μ m.
Embodiment 4
Its porosity of the water-soluble staltic cellulose fibre of present embodiment is 90%, and roughness is 18 μ m.
Its equipment and process conditions are basic identical with embodiment 3, and only different is, are raw material with pretreated viscose, and its pretreated method is with embodiment 2.Its porosity is 90%, and roughness is 18 μ m.
Embodiment 5
Its porosity of the water-soluble staltic cellulose fibre of present embodiment is 95%, and roughness is 18 μ m.
Its equipment and process conditions are substantially with embodiment 3, and only different is contains the monochloracetic acid of 30% percentage by volume and 30% acetone in the monochloracetic acid reactant liquor, and all the other are water.Its porosity is 95%, and roughness is 18 μ m.
Embodiment 6
Its porosity of the water-soluble staltic cellulose fibre of this example is 95%, and roughness is 19 μ m.
A, with pretreated cotton textiles flower fiber as raw material, raw material is placed reactant liquor do action reactor, with raw material with the mixed liquor of the ethanol liquid of 30% sodium hydrate aqueous solution and 95% as reactant liquor, handle to activate in 2.0 hours in 30 ℃, bath raio is 1: 7.The volume ratio of 30% sodium hydrate aqueous solution and 95% ethanol liquid is 1: 1.
B, with the monochloracetic acid reactant liquor raw material after 30 ℃ of activation of handling among a 5.7 hours, bath raio 1: 2.5 contains the monochloracetic acid of 20% percentage by volume in the said monochloracetic acid reactant liquor, the acetone of 50% percentage by volume and methyl alcohol, all the other are water.The volume ratio of acetone and methyl alcohol is 1: 1.
Being in 20% the hydrochloric acid and the fiber among the b with containing the hydrogen chloride percetage by weight after c, the etherificate, is 7.3 until making its PH.
D with in the hydrochloric acid and after, with 70% ethanol water fiber is washed again, until salt content is 1.2% percetage by weight, carry out Separation of Solid and Liquid with centrifugal process, isolate fiber, in room formula drying machine, under 80 ℃ temperature, dry, through on cotton comb, carrying out combing, on opener, carry out shredding and handle after the oven dry.Its porosity is 95%, and roughness is 19 μ m.
Claims (8)
1, a kind of water-soluble staltic cellulose fibre, it is characterized in that, with pretreated viscose or pretreated textile fiber is raw material, raw material and NaOH reactant aqueous solution are activated, again with containing ethanol, wherein a kind of alcohol of propyl alcohol or acetone or 1: 1 acetone of volume ratio and methyl alcohol, all the other are for after the monochloracetic acid mixed liquor of water carries out etherificate as reactant liquor, with in the hydrochloric acid and etherificate after fiber, wash with ethanol water again, carry out Separation of Solid and Liquid, oven dry forms, and this water-soluble staltic cellulose fibre porosity is greater than between the 60-99%, and roughness is greater than 15 μ m-20 μ m.
2, a kind of manufacture method of water-soluble staltic cellulose fibre is characterized in that, comprising:
A, be raw material with pretreated viscose or pretreated textile fiber, raw material is placed the reactor of reactant liquor do action, raw material was handled 1-2 hour as reactant liquor with the sodium hydrate aqueous solution of percetage by weight 10-50%, activate; bath raio 1: 5.1-20
B, handle after the activation among a raw material 5.6-8 hour; bath raio is 1: 2.5; carry out etherificate; a said haloalkyl acid reaction liquid is the monochloracetic acid reactant liquor; the monochloracetic acid reactant liquor is for containing wherein a kind of alcohol of ethanol, propyl alcohol or acetone or 1: 1 acetone of volume ratio and methyl alcohol; all the other are the mixed liquor of water with a haloalkyl acid reaction liquid
C, with fiber in the hydrochloric acid and among the b, be 6.5-7.5 until PH,
D, with the fiber among the ethanol water of the 60-74% washing c, until salt content be smaller or equal to 3% after, carry out liquid-solid separation, tell fiber, dry again, carry out combing, shredding at last.
3, according to the manufacture method of a kind of water-soluble staltic cellulose fibre of claim 2, it is characterized in that, under 10-50 ℃ temperature, handle raw material, activate.
4, according to the manufacture method of a kind of water-soluble staltic cellulose fibre of claim 2, it is characterized in that, handle raw material with the sodium hydrate aqueous solution of percetage by weight 25-50% and 95% ethanol liquid mixed liquor as reactant liquor, activate, the volume ratio of the sodium hydrate aqueous solution of 25-50% and 95% ethanol liquid is 1: 1.
5, according to the manufacture method of a kind of water-soluble staltic cellulose fibre of claim 2, it is characterized in that, under the temperature of room temperature～75 ℃, carry out etherificate.
6, according to the manufacture method of a kind of water-soluble staltic cellulose fibre of claim 2, it is characterized in that, the monochloracetic acid reactant liquor is the monochloracetic acid that contains the percentage by volume of 15-40%, the ethanol of the percentage by volume of 20-50%, the propyl alcohol a kind of alcohol wherein or 1: 1 the acetone of volume ratio and the methyl alcohol of acetone or 20-50% percentage by volume, all the other are the mixed liquor of water.
7, according to the manufacture method of a kind of water-soluble staltic cellulose fibre of claim 2, it is characterized in that, wash to salt content smaller or equal to 3% to 1.1%.
8, according to the manufacture method of a kind of water-soluble staltic cellulose fibre of claim 2, it is characterized in that, in drying room formula drying machine, under＜120 ℃-60 ℃ temperature, dry.
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| CNB991192532A CN1142338C (en) | 1999-08-30 | 1999-08-30 | Water-soluble staltic cellulose fibre and its preparing process |
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| CNB991192532A CN1142338C (en) | 1999-08-30 | 1999-08-30 | Water-soluble staltic cellulose fibre and its preparing process |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100408735C (en) * | 2003-12-19 | 2008-08-06 | 郭利明 | Process for preparing water soluble plant cellulose (thread) and color variable water soluble plant cellulose (thread) |
| CN101284144B (en) * | 2008-05-30 | 2011-06-08 | 上海爱灵卫生材料有限公司 | Soluble hemostatic cotton |
| CN101623512B (en) * | 2009-08-13 | 2013-11-13 | 黄艇 | Production method of water-soluble hemostatic gauze |
| CN101961505A (en) * | 2010-09-28 | 2011-02-02 | 北京纺织科学研究所 | Methods for preparing medical anti-adhesion hemostatic material and medical anti-adhesion hemostatic washing fluid |
| CN104389155B (en) * | 2014-12-18 | 2016-02-24 | 山东蓝汀制药有限公司 | A kind of medical material and preparation method |
| CN107281534A (en) * | 2016-04-11 | 2017-10-24 | 宣晓星 | A kind of preparation method of natural bamboo fibres hemostatic gauze |
| CN105862407A (en) * | 2016-05-05 | 2016-08-17 | 黄艇 | Method for preparing bamboo fiber hemostatic gauze |
| CN106638092A (en) * | 2016-09-14 | 2017-05-10 | 青岛大学 | Flame-retardant paper pulp and preparation method for flame-retardant paper |
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