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absorbent fiber

A fiber and fiber cross-section technology, applied in the field of fibers, can solve the problems of insufficient liquid absorption of fibers, harsh reaction conditions, loss of liquid absorption function, etc., and achieve good liquid absorption performance and antibacterial performance, mild reaction conditions, and liquid absorption capacity. reduced effect

Active Publication Date: 2018-03-30
JIANGSU NEWVALUE MEDICAL PROD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these modification methods, on the one hand, have harsh reaction conditions, cumbersome steps, and are not easy to control; on the other hand, the distribution position and quantity of substituents on the molecular chain of the product obtained from the reaction are uncertain, making it difficult to effectively control the liquid absorption performance of the product.
In addition, the above products do not have antimicrobial properties either
These problems will greatly limit the clinical application of dressings prepared from chitin fibers, especially in the treatment of burns and chronic wounds.
[0005] In particular, in the past chitin fibers, people often control the liquid absorption performance of the fiber by controlling the degree of substitution, but the inventors of the present invention found that if the substitution is too low, the liquid absorption of the fiber is insufficient, and if the substitution is too high, Although the liquid absorption is significantly increased, the fiber shape is difficult to maintain, that is, the fibers will be dissolved or dispersed by the absorbed liquid
At this time, the outflow of liquid will cause a certain degree of loss of suction function.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088]Weigh 5 g of chitin fibers with a length of 6 cm and a p / (m+n+p) of 0.25, disperse them in 50 mL of isopropanol, add 2.54 g of 2-hydroxyethyl acrylate, and shake evenly at room temperature. React in a constant temperature water bath for 48 hours under the same conditions, separate the reacted chitin fibers from the reaction mixture, wash twice with 80% (v / v) methanol aqueous solution, take out the fibers, dry them, and disperse them in 80% (v / v) v) Add 30% (w / v) potassium hydroxide aqueous solution dropwise to methanol aqueous solution, adjust the pH of methanol and potassium hydroxide aqueous solution mixture to 11.0, soak for 1 hour, and then separate the soaked fiber from the mixture , washed 3 times with 80% (v / v) methanol aqueous solution, dehydrated, and dried at 40°C to obtain a liquid-absorbent fiber with a viscosity-average molecular weight (Mη) of 3 million and a degree of substitution of acryl group total substance of 0.17.

[0089] Dissolve absorbent fibers i...

Embodiment 2

[0091] Weigh 5 g of chitin fibers with a length of 6 cm and a p / (m+n+p) of 0.10, disperse them in 50 mL of isopropanol, add 7.09 g of 2-hydroxypropyl acrylate, and shake evenly at room temperature. React in a constant temperature water bath for 48 hours under the same conditions, separate the reacted chitin fibers from the reaction mixture, wash twice with 80% (v / v) methanol aqueous solution, take out the fibers, dry them, and disperse them in 80% (v / v) v) Add 30% (w / v) potassium hydroxide aqueous solution dropwise to methanol aqueous solution, adjust the pH of methanol and potassium hydroxide aqueous solution mixture to 11.0, soak for 1 hour, and then separate the soaked fiber from the mixture , washed three times with 80% (v / v) methanol aqueous solution, dehydrated, and dried at 40°C to obtain a liquid-absorbent fiber with a viscosity-average molecular weight of 3 million and a degree of substitution of acryl group total substance of 0.30.

[0092] Dissolve absorbent fibers ...

Embodiment 3

[0094] Weigh 5 g of chitin fibers with a length of 6 cm and a p / (m+n+p) of 0.10, disperse them in 50 mL of isopropanol, add 14.17 g of 2-hydroxypropyl acrylate, and shake evenly at room temperature. React in a constant temperature water bath for 48 hours under the same conditions, separate the reacted chitin fibers from the reaction mixture, wash twice with 80% (v / v) methanol aqueous solution, take out the fibers, dry them, and disperse them in 80% (v / v) v) Add 30% (w / v) potassium hydroxide aqueous solution dropwise to methanol aqueous solution, adjust the pH of methanol and potassium hydroxide aqueous solution mixture to 11.5, soak for 1 hour, and then separate the soaked fiber from the mixture , shake dry, and place in saturated CaCl 2 Soak in the solution for 1 hour, take out the fiber, wash 3 times with 80% (v / v) methanol aqueous solution, and dry at 40°C after dehydration to obtain a viscosity-average molecular weight of 500,000 and a total substitution degree of acryloyl...

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Abstract

The invention aims to provide a liquid absorption fiber. The fiber comprises a polymer represented by the following structural form shown in the description, wherein R is at least one selected from a group consisting of -NH2, -OCH2CH2OH, -OCH2CH2CH2OH, -OH, -ONa, -OK and -OCa; m, n and p respectively represent the quantity percentages of corresponding repeating units in a polymer molecule, and meet the following relational expression: m+n+p=1, p / (m+n+p)=0.05 to 0.30; when the degree of substitution D is defined to be m / (m+n+p): the total degree of substitution of the fiber Ds is 0.09 to 0.8, and the value of the degree of substitution Do of the polymer at the center point of the cross section of the fiber / the degree of substitution Dx of the polymer on the edge of the cross section of the fiber is 0 to 0.98. By the use of a simple process, the antibacterial performance, the liquid absorption property and the like of the fiber are improved by controlling the proportions of the repeating units with different substituent groups in the polymer contained in the fiber and enabling the degree of substitution of the outer side (edge) of the fiber to be greater than that of the inside (center) of the fiber; the fiber suitable for clinical application, particularly applicable in the aspects such as hemostasis, burns and chronic wound treatment, is provided.

Description

technical field [0001] The present invention relates to a fiber, in particular to a fiber which can absorb liquid by swelling. Background technique [0002] Chitin has good biocompatibility, biodegradability, hemostasis, and promotion of wound healing, making it suitable for various tissue engineering scaffold materials such as absorbable surgical sutures, wound dressings, drug carrier materials, and artificial skin has broad application prospects. [0003] Chitin is dissolved in organic acid or inorganic acid to form a viscous colloid. After spinning, coagulation, washing, drying and other processes, chitin fibers can be obtained, which can be used to prepare wound dressings. Chinese patent document CN1129748A (deacetylated chitosan fiber and its manufacturing method and application), Chinese patent document CN1149093A (chitin fiber and its preparation method), Chinese patent document CN101250759A (medical chitosan fiber and its preparation method) etc. Manufacturing meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/224D06M13/203D06M13/41A61L15/28A61L15/44A61L24/08D06M101/10
CPCA61L15/28A61L15/46A61L24/0015A61L24/08A61L2300/232A61L2300/404D06M13/203D06M13/2246D06M13/41D06M2101/10C08L5/08
Inventor 周应山王立平龚祖光杨柳清蒋锐徐灿红
Owner JIANGSU NEWVALUE MEDICAL PROD CO LTD
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