Yarn containing oxalis fiber and preparation method and use thereof

Abstract

The present invention relates to a yarn containing Oxalis fiber and a preparation method and use thereof, comprising the following steps: pretreatment, microcapsule preparation, Oxalis pulp preparation, Oxalis alkali cellulose preparation, oxidation, yellowing, adhesive liquid preparation, spinning solution preparation, and wet spinning steps. Different from the prior art, the above technical scheme makes full use of Oxalis, extracts the effective components of Oxalis water extract, and coats the soluble effective components of Oxalis in the form of microcapsules, and then uses the Oxalis fiber remaining after water extraction to prepare adhesive liquid, and the adhesive liquid is blended with the microcapsules to obtain a spinning solution that can be wet-spun and a yarn containing Oxalis fiber. The technical scheme makes full use of the whole plant of Oxalis, is energy-saving and environmentally friendly, and the efficacy of Oxalis is well preserved, which is a natural functional yarn.

Description

Technical Field

[0001] The present application relates to the field of textiles, and in particular to a yarn containing oxalis fiber and a preparation method and use thereof. Background Art

[0002] In recent years, with the continuous improvement of people's quality of life and the continuous enhancement of health and environmental awareness, the international market has higher requirements for the comfort, health care and fashion of clothing. In view of the fierce competition in the domestic and foreign textile and clothing markets, the market demand for functional and health care clothing has gradually increased, especially health care functional clothing woven from natural plant fibers.

[0003] Oxalis, a perennial herb, has sparse soft hairs all over; the stem is creeping or obliquely ascending, with many branches. The leaves are alternate, palmately compound leaves with 3 leaflets, inverted cordate, and the leaflets are sessile. Oxalis, especially the whole herb of creeping Oxalis, can be used as medicine. It is cold in nature, sour in taste, and enters the liver and small intestine meridians. It has the effects of clearing away heat and detoxification, calming the liver and calming the nerves, relieving inflammation and pain, promoting dampness and reducing swelling, and cooling blood and dispersing blood stasis.

[0004] Red Oxalis pigment has an inhibitory effect on Escherichia coli, Bacillus subtilis and Staphylococcus aureus, and the inhibitory effect becomes more obvious as the concentration of the pigment solution increases. Therefore, red Oxalis pigment can be used as a food pigment and a natural preservative under certain conditions. The water extract of Oxalis can promote the proliferation, differentiation and mineralization of osteoblasts in vitro.

[0005] There is currently no precedent in the art for using the whole herb of Oxalis to prepare yarn. Summary of the invention

[0006] In view of the above problems, the present application provides a method of using natural plant Oxalis as raw material, encapsulating the effective components of water extract of Oxalis in the form of microcapsules, and mixing with spinning solution prepared by Oxalis fiber for 25 minutes before spinning to form Oxalis fiber yarn. This technical solution makes full use of the whole plant of Oxalis, saves

[0007] It is environmentally friendly and retains the efficacy of Oxalis, making it a functional yarn made from natural materials.

[0008] To achieve the above object, the inventor provides a method for preparing a yarn containing Oxalis fiber, comprising the following steps:

[0009] Pretreatment: adding water and ethanol to the dried Oxalis, decoct and filter to obtain a decoction and a first precipitate; concentrating the decoction at 70-90°C to obtain an Oxalis water extract; the mass ratio of the ethanol, Oxalis and water is

[0010] The ratio is 0-30:80-120:200-800;

[0011] Preparation of microcapsules: Gum arabic and chitosan are added with water to obtain a wall material solution, the water extract of Oxalis oxalis is added into the wall material solution, and the water extract microcapsules of Oxalis oxalis are obtained by spray drying;

[0012] Preparation of Oxalis pulp: tearing the first precipitate, squeezing and dehydrating it, and then impregnating it with an impregnation liquid, refining it, and filtering it through 35 to obtain Oxalis pulp; the composition and content of the impregnation liquid are NaCO3 4-10wt%, anthraquinone 0.1-3wt%, NaSiO3 2-4wt%, and the rest is water; the refining adopts a two-stage disc grinding;

[0013] Preparation of oxali cellulose: adding 40-60% NaOH aqueous solution to the oxali cellulose pulp, soaking at 40-70° C. for 10-35 min, filtering, squeezing and dehydrating to obtain oxali cellulose;

[0014] Oxidation and yellowing: adding 0.3-5% hydrogen peroxide to the oxali cellulose and soaking for 10-20 minutes to oxidize 40% of the oxali cellulose; then adding 30-40% carbon disulfide reagent to oxidize the oxali cellulose.

[0015] The cellulose sodium sulfonate is further subjected to yellowing reaction and filtered to obtain the cellulose sodium sulfonate; the esterification degree of the cellulose sodium sulfonate is 45-55;

[0016] Preparation of adhesive liquid: adding 10-20% NaOH aqueous solution to the sodium cellulose sulfonate to obtain an adhesive liquid, the falling ball viscosity of the adhesive liquid is 40-60s;

[0017] 45 Preparation of spinning solution: the microcapsules are mixed with the viscose solution, degassed and filtered to obtain a spinning solution containing Oxalis fiber; the mass percentage of the microcapsules in the spinning solution containing Oxalis fiber is 1-20%; the spinning solution containing Oxalis fiber is mixed with other viscose spinning solutions to obtain a working spinning solution; the content of the spinning solution containing Oxalis fiber in the working spinning solution is 30-100%; the maturity NH4Cl value of the working spinning solution is 8-12ml;

[0018] 50. Wet spinning: The working spinning solution is wet-spun using a spinning machine to obtain yarn containing Oxalis fiber.

[0019] Different from the prior art, the above technical solution makes full use of Oxalis, extracts the effective components of Oxalis water extract, and encapsulates the soluble effective components of Oxalis in the form of microcapsules, and then uses the remaining Oxalis fibers after water extraction to prepare adhesive liquid, and the adhesive liquid is blended with the microcapsules to obtain a spinning solution containing Oxalis fibers that can be wet-spun and a yarn containing Oxalis fibers. This technical solution makes full use of the whole plant of Oxalis, is energy-saving and environmentally friendly, and the efficacy of Oxalis is well preserved.

[0020] In some embodiments, the pretreatment step is to decoct for 2-5 times, each time for 0.5-3 hours; after the decoctions are combined, they are concentrated and dried at 70-90° C. for 2-6 hours.

[0021] In some embodiments, in the microcapsule preparation step, the mass ratio of gum arabic to chitosan is 40-50:40-50; and the concentration of the wall material solution is 1-10%.

[0022] In some embodiments, the Oxalis pulp preparation step adopts a two-stage disc mill; a pressing and dewatering screw is arranged between the two disc mills to remove 75-95% of the impregnation liquid; the pulp after the first disc mill is refined by the pressing and dewatering screw and concentrated to 20-40% of the original volume; the pulp concentration of the first disc mill is 15%-45%; the beating degree is 25-35OSR; the pulp concentration of the second disc mill is 15%-35%, and the beating degree is 40-70OSR.

[0023] In some embodiments, in the preparation step of Oxalis alkali cellulose, the volume ratio of the Oxalis pulp to the 40-60% NaOH aqueous solution is 1:2.5-5.

[0024] In some embodiments, in the preparation step of the Oxalis alkali cellulose, the first precipitate is torn and squeezed and dehydrated using a press tearing machine, and the dehydrated liquid obtained by squeezing and dehydrating is concentrated and then incorporated into the Oxalis water extract.

[0025] The inventor also provides a yarn containing Oxalis fiber, wherein the Oxalis fiber is prepared by any of the above-mentioned preparation methods.

[0026] Different from the prior art, the yarn is mainly prepared from Oxalis fiber, and also contains microcapsules with Oxalis water extract, which makes full use of all the effective ingredients of Oxalis and is natural and environmentally friendly.

[0027] The inventor also provides a use of a yarn containing Oxalis fiber in the preparation of an anti-inflammatory patch and a bandage. According to the physiological effects of Oxalis, the yarn has the effects of anti-inflammatory and analgesic, dampness-removing and swelling-removing, cooling blood and dispersing blood stasis.

[0028] The inventor also provides a use of a yarn containing Oxalis fiber in preparing fresh-keeping bags. According to the antibacterial and antiseptic effects of Oxalis, the fiber has the effect of inhibiting food decay, can become a natural preservative, and can be used to make food packaging bags.

[0029] The inventor also provides a use of yarn containing Oxalis fiber in the preparation of health-care clothing. According to the effect of Oxalis in promoting the proliferation, differentiation and mineralization of osteoblasts, this fiber can be used to make health-care clothing, effectively prevent osteoporosis and promote the growth of bone cells.

[0030] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation mode and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0032] In the drawings of the specification:

[0033] Figure 1 Schematic diagram of wet spinning process equipment. DETAILED DESCRIPTION

[0034] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0036] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0037] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0038] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0039] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0040] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0041] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0042] To achieve the above object, the inventor provides a method for preparing a yarn containing Oxalis fiber, comprising the following steps:

[0043] Pretreatment: adding water and ethanol to the dried Oxalis, decocting and filtering to obtain a decoction and a first precipitate; concentrating the decoction at 70-90° C. to obtain an Oxalis water extract; the mass ratio of the ethanol, Oxalis and water is 0-30:80-120:200-800;

[0044] Adding ethanol can promote the extraction of alcohol-soluble active ingredients in Oxalis, and ethanol evaporates during the decoction and drying process.

[0045] Preparation of microcapsules: Gum arabic and chitosan are added with water to obtain a wall material solution, the water extract of Oxalis oxalis is added into the wall material solution, and the water extract microcapsules of Oxalis oxalis are obtained by spray drying;

[0046] Preparation of Oxalis pulp: tearing the first precipitate, squeezing and dehydrating it, and then impregnating it with an impregnation liquid, refining it, and filtering it to obtain Oxalis pulp; the composition and content of the impregnation liquid are NaCO3 4-10wt%, anthraquinone 0.1-3wt%, NaSiO3 2-4wt%, and the rest is water; the refining adopts a two-stage disc mill;

[0047] Oxalis pulp is a fibrous aggregate. The role of NaCO3 and anthraquinone in the impregnation liquid is to dissolve the lignin between the fibers and dissociate the precipitate after water extraction of Oxalis into pulp; while NaSiO3 is used to chelate some heavy metal ions and play a buffering role. In addition, the impregnation liquid has less corrosive effect on the equipment, which is conducive to the subsequent disc grinding.

[0048] Oxalis fiber is a short fiber, and the fiber is processed (tearing, splitting, brooming, bending, crushing and kneading) by disc grinding, which is conducive to the later swelling and reaching the spinning viscosity.

[0049] Preparation of oxali cellulose: adding 40-60% NaOH aqueous solution to the oxali cellulose pulp, soaking at 40-70° C. for 10-35 min, filtering, squeezing and dehydrating to obtain oxali cellulose;

[0050] Alkali treatment can convert cellulose macromolecules into cellulose materials with smaller molecular weights, while destroying some relatively inert cellulose structures and increasing the reactivity of cellulose.

[0051] Oxidation and yellowing: adding 0.3-5% hydrogen peroxide to the oxali cellulose and soaking for 10-20 minutes to oxidize the oxali cellulose; continuing to add 30-40% carbon disulfide reagent to further yellow the oxali cellulose, filtering to obtain sodium cellulose sulfonate; the esterification degree of the sodium cellulose sulfonate is 45-55;

[0052] Oxidation can effectively degrade the larger molecular chains in the alkali cellulose of Oxalis oxali, further dissociating the fibers into short fibers and small molecules, which is conducive to swelling and achieving spinnable viscosity. Through yellowing, sodium cellulose sulfonate soluble in dilute alkali solution is obtained.

[0053] Preparation of adhesive liquid: adding 10-20% NaOH aqueous solution to the sodium cellulose sulfonate to obtain an adhesive liquid, the falling ball viscosity of the adhesive liquid is 40-60s;

[0054] Through the previous impregnation, pulping, alkali treatment, oxidation, and yellowing series of processes, the Oxalis fiber is fully degraded to form fine fibers, which can swell in dilute alkali solution to form a viscose; at the same time, the falling ball viscosity of the viscose is controlled at 40-60S, which is suitable for wet spinning. The sodium cellulose sulfonate is added with a 10-20% NaOH aqueous solution to mature the viscose.

[0055] Preparation of spinning solution: the microcapsules are mixed with the viscose solution, degassed and filtered to obtain Oxalis spinning solution; the mass percentage of the microcapsules in the Oxalis spinning solution is 1-20%; the Oxalis spinning solution is mixed with other viscose spinning solutions to obtain a working spinning solution; the content of the Oxalis spinning solution in the working spinning solution is 30-100%; the maturity NH4Cl value of the working spinning solution is 8-12; the maturation of viscose in the present technical solution: the preparation of the viscose solution starts from the dissolution of sodium cellulose sulfonate, and continues in the processes of mixing, degassed, filtering, etc. until the spinning is completed.

[0056] In some embodiments, when the maturity of the cellulose spinning solution of Oxalis oxyphylla is less than 8-12, other viscose spinning solutions with better maturity can be added so that the maturity of the mixed spinning solution reaches 8-12, which is convenient for spinning.

[0057] Wet spinning: The working spinning solution is wet-spun using a spinning machine to obtain yarn containing Oxalis fiber.

[0058] Different from the existing technology, the above technical scheme makes full use of Oxalis, extracts the effective ingredients of Oxalis water extract, and encapsulates the effective ingredients of Oxalis in the form of microcapsules, and then uses the Oxalis fibers remaining after water extraction to prepare an adhesive liquid, and the adhesive liquid is blended with the microcapsules to obtain a spinning solution that can be wet-spun and an Oxalis fiber-containing yarn.

[0059] In some embodiments, the pretreatment step is to decoct for 2-5 times, each time for 0.5-3 hours; after the decoctions are combined, they are concentrated and dried at 70-90° C. for 2-6 hours.

[0060] In the current processing steps, if a high ethanol content is added, the amount of water can be appropriately reduced, the number of decoctions can be reduced, and the decoction time can also be reduced, but the corresponding 70-90°C concentration process time is increased to fully volatilize the ethanol.

[0061] In some embodiments, in the microcapsule preparation step, the mass ratio of gum arabic to chitosan is 40-50:40-50; and the concentration of the wall material solution is 1-10%.

[0062] In some embodiments, the Oxalis pulp preparation step adopts a two-stage disc mill; a pressing and dewatering screw is arranged between the two disc mills to remove 75-95% of the impregnation liquid; the pulp after the first disc mill is refined by the pressing and dewatering screw and concentrated to 20-40% of the original volume; the pulp concentration of the first disc mill is 15%-45%; the beating degree is 25-35OSR; the pulp concentration of the second disc mill is 15%-35%, and the beating degree is 40-70OSR.

[0063] In some embodiments, in the preparation step of Oxalis alkali cellulose, the volume ratio of the Oxalis pulp to the 40-60% NaOH aqueous solution is 1:2.5-5.

[0064] In some embodiments, in the preparation step of the Oxalis alkali cellulose, the first precipitate is torn and squeezed and dehydrated using a press tearing machine, and the dehydrated liquid obtained by squeezing and dehydrating is concentrated and then incorporated into the Oxalis water extract.

[0065] The fiber is torn into smaller and finer parts by using a squeezing and tearing machine, and the excess water-soluble matter is squeezed out during the squeezing and dehydration process. This part of the water-soluble matter is combined and concentrated with the water extract of Oxalis oxalis, and fully utilized. The squeezed insoluble matter of Oxalis oxalis is torn into fine pieces and then impregnated with chemicals, which has a better ability to absorb chemicals. In some embodiments, the squeezing ratio is 2:1-5:1.

[0066] In some embodiments, in the step of preparing oxali cellulose, the pressing ratio of the pressing and dehydrating step is 2-3:1.

[0067] In some embodiments, the fibers containing Oxalis after wet spinning are subjected to a series of post-treatments such as bundling, stretching, washing, desulfurization, bleaching, pickling, oiling, drying, packaging, etc., so as to adapt them to the requirements of textile processing and use.

[0068] The inventor also provides a yarn containing Oxalis fiber, wherein the Oxalis fiber is prepared by any of the above-mentioned preparation methods.

[0069] Different from the existing technology, the yarn is mainly prepared from Oxalis fiber by wet spinning, and also contains microcapsules with Oxalis water extract, which makes full use of the whole Oxalis plant, avoids waste, and is natural and environmentally friendly.

[0070] The inventor also provides a use of yarn containing Oxalis fiber in the preparation of anti-inflammatory medicine patches and bandages. According to the physiological effects of Oxalis, the yarn containing Oxalis fiber has the effects of anti-inflammatory and analgesic, dampness-removing and swelling-removing, cooling blood and dispersing blood stasis, and has antibacterial function, and can be used to prepare medical bandages.

[0071] The inventor also provides a use of yarn containing Oxalis fiber in preparing fresh-keeping bags. According to the antibacterial and antiseptic effects of Oxalis, the yarn containing Oxalis fiber has the effect of inhibiting food decay, can become a natural preservative, and can be used to make food packaging bags.

[0072] The inventor also provides a use of yarn containing Oxalis fiber in preparing health-care clothing. According to the effect of Oxalis in promoting the proliferation, differentiation and mineralization of osteoblasts, the yarn containing Oxalis fiber can effectively prevent osteoporosis and promote the growth of bone cells, and can be used to make health-care clothing.

[0073] The wet spinning equipment described in this embodiment is as follows Figure 1 As shown, the process includes the following steps: the working spinning solution is sent to the spinning machine through a circulation pipeline, metered by a metering pump, and then enters the spinneret (cap) through a candle filter and a connecting pipe. The spinning solution stream pressed out from the spinneret hole enters the coagulation bath, the solvent in the spinning solution stream diffuses into the coagulation bath, and the coagulant penetrates into the stream, so that the spinning solution stream reaches a critical concentration and precipitates in the coagulation bath to form fibers.

[0074] Example 1 A yarn containing oxalis fiber and its preparation:

[0075] Pretreatment: add water and ethanol to the dried Oxalis, and boil twice, each time for 1 hour; after boiling and filtering, obtain a decoction and a first precipitate; concentrate and dry the decoction at 70-90°C for 6 hours to obtain an Oxalis water extract; the mass ratio of the ethanol, Oxalis and water is 30:100:500.

[0076] Preparation of microcapsules: Gum arabic and chitosan are added with water to obtain a wall material solution, the water extract of Oxalis oxalis is added to the wall material solution, and the water extract of Oxalis oxalis is obtained by spray drying; the mass ratio of gum arabic and chitosan is 1:1; the concentration of the wall material solution is 5%.

[0077] Preparation of Oxalis pulp: tearing the first precipitate, squeezing and dehydrating it, and then impregnating it with an impregnation liquid, refining it, and filtering it to obtain Oxalis pulp; the composition and content of the impregnation liquid are NaCO3 5wt%, anthraquinone 1wt%, NaSiO3 3wt%, and the rest is water;

[0078] The pulping adopts two-stage disc grinding; a pressing and dewatering screw is set between the two disc grindings to remove 85% of the impregnation liquid; the pulp after the first disc grinding is concentrated to 30% of the original volume through the pressing and dewatering screw; the pulp concentration of the first disc grinding is 15%-45%; the beating degree is 25-35OSR; the pulp concentration of the second disc grinding is 15%-35%, and the beating degree is 40-70OSR.

[0079] Preparation of Oxalis alkali cellulose: Add 50% NaOH aqueous solution to the Oxalis pulp at a volume ratio of 1:5; soak at 60° C. for 20 minutes, filter, squeeze and dehydrate to obtain Oxalis alkali cellulose.

[0080] Oxidation and yellowing: adding 1% hydrogen peroxide to the oxali cellulose and soaking for 15 minutes to oxidize the oxali cellulose; adding 35% carbon disulfide reagent and soaking for 10 minutes to further yellow the oxali cellulose, filtering to obtain sodium cellulose sulfonate; the esterification degree of the sodium cellulose sulfonate is 50;

[0081] Preparation of adhesive liquid: adding the sodium cellulose sulfonate to a 15% NaOH aqueous solution to obtain an adhesive liquid, the falling ball viscosity of the adhesive liquid being 40-60s;

[0082] Preparation of spinning solution: mixing the microcapsules with the adhesive solution, degassing and filtering to obtain Oxalis spinning solution; the mass percentage of the microcapsules in the Oxalis spinning solution is 10%; the content of the Oxalis spinning solution in the working spinning solution is 100%; the maturity NH4Cl value of the working spinning solution is 8-12;

[0083] Wet spinning: The working spinning solution is wet-spun using a spinning machine to obtain yarn containing Oxalis fiber.

[0084] Example 2 A yarn containing oxalis fiber and its preparation:

[0085] Pretreatment: adding water to the dried Oxalis, decocting for 5 times, each time for 1 hour; after decocting and filtering, obtaining a decoction and a first precipitate; concentrating and drying the decoction at 70° C. for 2 hours to obtain an Oxalis water extract; the mass ratio of the Oxalis to water is 100:800;

[0086] Preparation of microcapsules: Gum arabic and chitosan are added with water to obtain a wall material solution, the water extract of Oxalis oxyphylla is added to the wall material solution, and the water extract of Oxalis oxyphylla is obtained by spray drying; the mass ratio of gum arabic and chitosan is 1:1; the concentration of the wall material solution is 5%;

[0087] Preparation of Oxalis pulp: tearing the first precipitate, squeezing and dehydrating it, and then impregnating it with an impregnation liquid, refining it, and filtering it to obtain Oxalis pulp; the composition and content of the impregnation liquid are NaCO3 10wt%, anthraquinone 0.1wt%, NaSiO3 2wt%, and the rest is water;

[0088] The pulping adopts two-stage disc grinding; a pressing and dewatering screw is set between the two disc grindings to remove 90% of the impregnation liquid; the pulp after the first disc grinding is concentrated to 20% of the original volume through the pressing and dewatering screw; the pulp concentration of the first disc grinding is 15%-45%; the beating degree is 25-35OSR; the pulp concentration of the second disc grinding is 15%-35%, and the beating degree is 40-70OSR.

[0089] Preparation of Oxalis alkali cellulose: Add 40% NaOH aqueous solution to the Oxalis pulp at a volume ratio of 2:5; soak at 50° C. for 30 minutes, filter, squeeze and dehydrate to obtain Oxalis alkali cellulose.

[0090] Oxidation and yellowing: 5% hydrogen peroxide is added to the oxali cellulose and soaked for 10 minutes to oxidize the 275 alkali cellulose of oxali; 30% carbon disulfide reagent is added and soaked for 10 minutes to oxidize the 275 alkali cellulose of oxali.

[0091] The cellulose further undergoes yellowing reaction, and is filtered to obtain sodium cellulose sulfonate; the degree of esterification of the sodium cellulose sulfonate is 48;

[0092] Preparation of adhesive liquid: The sodium cellulose sulfonate is added with 10% NaOH aqueous solution to obtain an adhesive liquid.

[0093] The drop ball viscosity of the adhesive is 40-60s;

[0094] 280 Preparation of spinning solution: mixing the microcapsules with the adhesive solution, degassing, and filtering to obtain Oxalis

[0095] Spinning solution; the mass percentage of the microcapsules in the Oxalis spinning solution is 20%; the content of the Oxalis spinning solution in the working spinning solution is 100%; the maturity NH4Cl value of the working spinning solution is 8-12;

[0096] Wet spinning: The working spinning solution is wet-spun using a spinning machine to obtain yarn containing Oxalis fiber.

[0097] Example 3 A yarn containing oxalis fiber and its preparation:

[0098] Pretreatment: adding water to the dried Oxalis, decocting for 5 times, each time for 1 hour; decocting and filtering to obtain a decoction and a first precipitate; concentrating and drying the decoction at 70°C for 2 hours to obtain an Oxalis water extract;

[0099] The mass ratio of water is 100:800;

[0100] 290 Microcapsule preparation: Gum arabic and chitosan are added with water to obtain a wall material solution, and the water extract of Oxalis oxalis is added

[0101] In the wall material solution, the water extract microcapsules of Oxalis oxyphylla are obtained by spray drying; the mass ratio of gum arabic to chitosan is 1:1; the concentration of the wall material solution is 1%;

[0102] Preparation of Oxalis pulp: The first precipitate is torn, squeezed and dehydrated, and then soaked with soaking liquid, refined, and

[0103] Filter to obtain Oxalis pulp; the composition and content of the impregnation liquid are NaCO34wt%, anthraquinone 3wt%, NaSiO32954wt%, and the rest is water;

[0104] The pulping adopts two-stage disc grinding; a pressing and dewatering screw is set between the two disc grindings to remove 90% of the impregnation liquid; the pulp after the first disc grinding is concentrated to 20% of the original volume through the pressing and dewatering screw; the pulp concentration of the first disc grinding is 15%-45%; the beating degree is 25-35OSR; the pulp concentration of the second disc grinding is 15%-35%, and the beating degree is 40-70OSR.

[0105] Preparation of Oxalis alkali cellulose: Add 60% NaOH aqueous solution to the Oxalis pulp at a volume ratio of 2:5; soak at 50° C. for 30 minutes, filter, squeeze and dehydrate to obtain Oxalis alkali cellulose.

[0106] Oxidation and yellowing: adding 5% hydrogen peroxide to the oxali cellulose and soaking for 10 minutes to oxidize the oxali cellulose; adding 30% carbon disulfide reagent and soaking for 10 minutes to further yellow the oxali cellulose, filtering to obtain sodium cellulose sulfonate; the esterification degree of the sodium cellulose sulfonate is 48;

[0107] Preparation of adhesive liquid: adding 10% NaOH aqueous solution to the sodium cellulose sulfonate to obtain an adhesive liquid, the falling ball viscosity of the adhesive liquid is 40-60s;

[0108] Preparation of spinning solution: mixing the microcapsules with the adhesive solution, degassing and filtering to obtain Oxalis sorrel spinning solution; the mass percentage of the microcapsules in the Oxalis sorrel spinning solution is 10%;

[0109] The content of the Oxalis spinning solution in the working spinning solution is 80%, and 20% of the polyester spinning solution is added; the maturity NH4Cl value of the working spinning solution is 8-12;

[0110] Wet spinning: The working spinning solution is wet-spun by a spinning machine to obtain yarn containing Oxalis fiber. Yarn containing Oxalis fiber has the same properties as viscose yarn (fiber). Different from ordinary viscose fiber, yarn containing Oxalis fiber contains effective ingredients of Oxalis, so it has pharmacological effects, antibacterial and antiseptic effects, and promotes the proliferation, differentiation and mineralization of osteoblasts. Yarn containing Oxalis fiber, like viscose, is processed into fabric containing Oxalis fiber through weaving and knitting to serve consumers.

[0111] Example 4

[0112] The yarn containing wood sorrel fiber prepared in Examples 1-3 was used to weave a medical bandage.

[0113] The yarn containing Oxalis fiber prepared in Examples 1-3 is used to weave food preservation bags.

[0114] The yarn containing Oxalis fiber prepared in Examples 1-3 is used to weave health-care underwear and joint protectors.

[0115] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A method for preparing yarn containing Oxalis fiber, characterized in that: The following steps are involved: Pretreatment: adding water and ethanol to the dried Oxalis, boiling and filtering to obtain a decoction and a first precipitate; The decoction is concentrated at 70-90° C. to obtain an Oxalis water extract; the mass ratio of ethanol, Oxalis and water is 0-30:80-120:200-800; Preparation of microcapsules: Gum arabic and chitosan are added with water to obtain a wall material solution, the water extract of Oxalis oxalis is added into the wall material solution, and the water extract microcapsules of Oxalis oxalis are obtained by spray drying; Preparation of Oxalis pulp: tearing the first precipitate, squeezing and dehydrating it, impregnating it with an impregnation liquid, refining it, and filtering it to obtain Oxalis pulp; the composition and content of the impregnation liquid are NaCO3 4-10wt%, anthraquinone 0.1-3wt%, NaSiO3 2-4wt%, and the rest is water; and refining is performed by two-stage disc grinding; Preparation of oxali cellulose: adding 40-60% NaOH aqueous solution to the oxali cellulose pulp, soaking at 40-70° C. for 10-35 min, filtering, squeezing and dehydrating to obtain oxali cellulose; Oxidation and yellowing: add 0.3-5% hydrogen peroxide to the oxali cellulose and soak for 10-20 minutes; continue to add 30-40% carbon disulfide reagent, soak for 10-20 minutes, filter, and obtain sodium cellulose sulfonate; the esterification degree of the sodium cellulose sulfonate is 45-55; Preparation of adhesive liquid: adding 10-20% NaOH aqueous solution to the sodium cellulose sulfonate to obtain an adhesive liquid, the falling ball viscosity of the adhesive liquid is 40-60s; Preparation of spinning solution: the microcapsules are mixed with the viscose solution, degassed and filtered to obtain a spinning solution containing Oxalis fiber; the mass percentage of the microcapsules in the spinning solution containing Oxalis fiber is 1-20%; the spinning solution containing Oxalis fiber is mixed with other viscose spinning solutions to obtain a working spinning solution; the content of the spinning solution containing Oxalis fiber in the working spinning solution is 30-100%; the maturity NH4Cl value of the working spinning solution is 8-12; Wet spinning: The working spinning solution is wet-spinned by a spinning machine to obtain a yarn containing Oxalis fiber; The preparation step of the Oxalis pulp comprises two-stage grinding; a pressing and dewatering screw is arranged between the two stages of grinding to remove 75-95% of the impregnation liquid; the pulp after the first stage of grinding is concentrated to 20-40% of the original volume by the pressing and dewatering screw; the pulp concentration of the first stage of grinding is 15%-45%; the beating degree is 25-35OSR; the pulp concentration of the second stage of grinding is 15%-35% and the beating degree is 40-70OSR; The preparation step of the oxali cellulose is that the volume ratio of the oxali pulp to the NaOH aqueous solution with a concentration of 40-60% is 1:2.5-5.

2. The preparation method according to claim 1, characterized in that: The pretreatment step comprises decocting for 2-5 times, each time for 0.5-3 hours; after the decoctions are combined, they are concentrated and dried for 2-6 hours.

3. The preparation method according to claim 1, characterized in that: In the microcapsule preparation step, the mass ratio of gum arabic to chitosan is 40-50:40-50; and the concentration of the wall material solution is 1-10%.

4. A yarn containing Oxalis fiber, characterized in that: The yarn containing Oxalis fiber is prepared by the preparation method described in any one of claims 1-3.

Images