CN113043414A - Preparation method of carbonized mildew-proof and cracking-proof bamboo straw - Google Patents
Preparation method of carbonized mildew-proof and cracking-proof bamboo straw Download PDFInfo
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 186
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- 241001330002 Bambuseae Species 0.000 title claims abstract description 186
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 186
- 239000011425 bamboo Substances 0.000 title claims abstract description 186
- 239000010902 straw Substances 0.000 title claims abstract description 98
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000003763 carbonization Methods 0.000 claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 34
- 238000005336 cracking Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
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- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
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- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/15—Decontamination of previously treated wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
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Abstract
本发明提供了一种炭化防霉防开裂竹质吸管的制备方法，该方法为：将毛竹加工成竹质棒材，分别从两侧面圆心向中心点顺时针和逆时针钻孔，分别距离竹质棒的中心点1mm处时，将钻孔平台向竹质棒一端移动，再向另一端移动，两个钻头反向退出，在竹质吸管预成品的内壁纵向刻缝，将镂空蒸汽棒插入竹质吸管预成品的内部通入水蒸汽炭化后，紫外杀菌，得炭化防霉防开裂竹质吸管。本发明通过反向等扭矩钻孔，提升了吸管加工成品率，降低竹吸管壁厚和重量；通过内壁刻缝和炭化处理，提升了竹质吸管抗开裂和抗霉变性能，延长了竹吸管仓储时间，并且可以通过对炭化参数的调整，实现多种颜色吸管的制备。The invention provides a method for preparing a carbonized, mildew-proof and crack-proof bamboo straw. The method comprises the following steps: processing moso bamboo into bamboo rods, drilling holes clockwise and counterclockwise from the center of the circle on both sides to the center point, respectively When the center point of the quality rod is 1mm, move the drilling platform to one end of the bamboo rod, and then move it to the other end, the two drills are withdrawn in the opposite direction, and the inner wall of the pre-finished bamboo straw is longitudinally carved, and the hollow steam rod is inserted. After the interior of the pre-finished bamboo straw is carbonized with water vapor, ultraviolet sterilization is performed to obtain a carbonized, mildew-proof and crack-resistant bamboo straw. The invention improves the processing yield of straws through reverse equal-torque drilling, reduces the wall thickness and weight of the bamboo straws; and improves the anti-cracking and anti-mildew properties of the bamboo straws through the inner wall slitting and carbonization treatment, and prolongs the bamboo straws. Storage time, and the preparation of various color straws can be realized by adjusting the carbonization parameters.
Description
Technical Field
The invention belongs to the technical field of bamboo processing, and particularly relates to a preparation method of a carbonized mildew-proof anti-cracking bamboo straw.
Background
The straw is widely used in the catering field, particularly the disposable straw polypropylene plastic straw occupies the main market of the straw, the use of the non-degradable disposable plastic straw causes huge pressure on the environment, and an environment-friendly substitute replaces the non-degradable plastic straw. Wherein the bamboo straw as a new product has the advantages of environmental protection and degradability.
The bamboo has a vascular bundle and thin-walled structure two-phase composite structure, and the vascular bundles in the thickness direction of the bamboo are arranged from outside to inside and are changed from dense to sparse, so that the thickness direction of the bamboo has an obvious gradient structure, and the bamboo is subjected to treatment at different temperatures and humidity, so that internal stress is easily generated, and finally, the bamboo product is cracked in the expansion and contraction process. In addition, the bamboo is used as a natural biomass material, and the outer layer structure of the bamboo is compact, so that the moisture of the bamboo is not easy to be discharged outwards, and the mould is easy to breed; meanwhile, the bamboo contains a large amount of substances which are beneficial to the growth of mould, such as organic matters, protein, starch, cellulose, hemicellulose, lignin and the like, and provides a nutrient source for the growth of the mould.
The bamboo is used for manufacturing daily necessities such as chopsticks, chopping blocks and the like, the advantages of high bamboo strength and ecological environmental protection can be well exerted, and the bamboo products can be well prevented from cracking and mildewing in the using process by using the modern processing technology and the antibacterial technology.
However, the structure of the straw made by drilling the bamboo chips is different from that of daily necessities such as bamboo chopsticks and bamboo chopping blocks. Because the bamboo suction pipe is of a hollow structure, and one part of the pipe wall of the suction pipe is the side of the green bamboo and the other part is the side of the yellow bamboo, the difference of the materials is large, and the suction pipe is easy to crack in the using process. In addition, the hollow internal structure of the bamboo straw has the inner aperture level below 10mm, and the inner surface is easy to enrich moisture in the environment, so that the bamboo straw is mildewed, and the human health is directly harmed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of the carbonized mildew-proof cracking-proof bamboo straw aiming at the defects of the prior art, the method prepares the bamboo straw by drilling holes with reverse equal torque, improves the processing yield of the straw, improves the production efficiency, can expand the application range of bamboo, reduces the wall thickness of the bamboo straw and reduces the weight of the bamboo straw; through inner wall slot and inner wall carbomorphism processing, promoted the anti fracture of bamboo straw and anti mildew performance, prolonged bamboo straw storage time to can realize the preparation of multiple colour straw through the adjustment to the carbomorphism parameter.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for preparing a carbonized mildew-proof and cracking-proof bamboo straw comprises the following steps:
s1, preparing bamboo bars: cutting moso bamboos with the age of 5-7 years, cutting to a fixed length, fixing the width and splitting, selecting bamboo chips with the wall thickness of more than or equal to 7mm, removing tabasheer and fixing the thickness, and drawing into round bars to obtain bamboo bars;
s2, reverse equal-torque drilling forming: fixing the bamboo rod obtained in the S1 on a drilling platform, horizontally moving the centers of circles of two side surfaces of the bamboo rod at the speeds of 1500-2000 r/min respectively, clockwise rotating and anticlockwise rotating at the speeds of 20-50 mm/S respectively, stopping continuously advancing when two drill bits reach positions 1mm away from the center of the bamboo rod respectively, keeping the two drill bits rotating in place, horizontally moving the drilling platform to one end of the bamboo rod for 2mm, horizontally moving the drilling platform to the other end of the bamboo rod for 4mm in the reverse direction, and horizontally and reversely withdrawing the bamboo rod at the speeds of 150-200 mm/S to obtain a bamboo pre-formed suction pipe product;
two drill bits are adopted to drill in opposite directions, one drill bit rotates clockwise, the other drill bit rotates anticlockwise, the probability of breakage in the drilling process can be reduced, the stress balance of the bamboo stick is kept, and the drill bits advance in opposite directions simultaneously, so that the machining efficiency is improved;
s3, performing slotting and carbonization inside the bamboo straw preform: uniformly carving 4-8 arc-shaped carved seams longitudinally on the inner wall of the bamboo suction pipe preform obtained in the step S2, uniformly distributing the carved seams on the inner wall of the bamboo suction pipe, inserting a hollow steam rod into the interior of the bamboo suction pipe preform, introducing water vapor with the temperature of 180-200 ℃ for 30-120 min, carbonizing the inner wall of the bamboo suction pipe preform, and naturally cooling to room temperature to obtain a carbonized bamboo suction pipe;
according to the invention, the carbonization is realized by introducing water vapor at high temperature, so that the degradation of starch nutrient components and partial hemicellulose in the bamboo straw is reduced, and the effect of controlling internal mildew is achieved;
the invention carries out carbonization treatment on the inner wall of the bamboo suction pipe preform, can better control the carbonization depth, greatly saves the treatment time, reduces the energy consumption, and needs to consume more energy if carrying out integral carbonization. And the carbonization of the surface layer of the material is easy to cause by the whole carbonization, and the carbonization degree of the inner layer is not enough.
According to the invention, the carbonization treatment is carried out on the inner wall of the bamboo straw preform, so that the hemicellulose and starch nutrients of the bamboo can be added and degraded, the mildew resistance of the product at the later stage is reduced, the mildew resistance is improved after carbonization, the texture is hardened and crisp, the change of the carbonization color expresses the carbonization degree, the color becomes dark and deep, the carbonization degree is high, the carbonization degree can be controlled according to the requirement on the hardness, a compact carbonization layer is formed on the surface of the straw after carbonization, the straw has better high temperature resistance, the surface stress is reduced after the inner wall of the bamboo straw is carbonized, and the cracking characteristic is reduced;
s4, outer surface sterilization treatment: and (4) rolling the carbonized bamboo straw obtained in the step (S3) through an ultraviolet device, and sterilizing for 5-10S to obtain the carbonized mildew-proof anti-cracking bamboo straw.
Preferably, the bamboo stick material in S1 has a length of 120 mm-200 mm and a diameter of 7 mm-9 mm.
Preferably, the thickness of the bamboo straw preform in S2 is 0.5 mm-1.5 mm.
Preferably, the depth of the arc-shaped notch in the S3 is 0.2 mm-0.5 mm.
Preferably, the outer diameter of the hollow steam rod in S3 is 5 mm-8 mm, the length of the hollow steam rod is telescopic, and the length adjusting range is 100 mm-250 mm.
Preferably, the ultraviolet lamps in the S4 are 4 ultraviolet lamps with power of 20W and are arranged in parallel at an adjacent distance of 15 cm.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the bamboo straw is prepared by reverse equal-torque drilling, the processing yield of the straw is improved, the production efficiency is improved, the application range of bamboo materials can be expanded, the wall thickness of the bamboo straw is reduced, and the weight of the bamboo straw is reduced; through inner wall slot and inner wall carbomorphism processing, promoted the anti fracture of bamboo straw and anti mildew performance, prolonged bamboo straw storage time to can realize the preparation of multiple colour straw through the adjustment to the carbomorphism parameter.
2. According to the invention, the carbonization is realized by introducing water vapor at high temperature, so that the degradation of starch nutrient components and partial hemicellulose in the bamboo straw is reduced, and the effect of controlling internal mildew is achieved; the invention carries out carbonization treatment on the inner wall of the bamboo suction pipe preform, can better control the carbonization depth, greatly saves the treatment time, reduces the energy consumption, and needs to consume more energy if carrying out integral carbonization. And the carbonization of the surface layer of the material is easy to cause by the whole carbonization, and the carbonization degree of the inner layer is not enough. According to the invention, the carbonization treatment is carried out on the inner wall of the bamboo straw preform, so that the nutritional ingredients of hemicellulose and starch of the bamboo can be added for degradation, the mildew resistance of the product at the later stage is reduced, the mildew resistance is improved after carbonization, the texture is hardened and crisp, the change of the carbonization color expresses the carbonization degree, the color becomes dark and deep, the carbonization degree is high, the carbonization degree can be controlled according to the requirement on the hardness, a compact carbonization layer is formed on the surface of the straw after carbonization, the straw has better high temperature resistance, the surface stress is reduced after the inner wall of the bamboo straw is carbonized, and the cracking characteristic is reduced.
The present invention will be described in further detail with reference to examples.
Detailed Description
Example 1
The preparation method of the carbonized mildew-proof and cracking-proof bamboo straw comprises the following steps:
s1, preparing bamboo bars: cutting moso bamboos with the age of 6 years, cutting to a fixed length, fixing the width and splitting, selecting bamboo chips with the wall thickness of more than or equal to 8mm, removing tabasheer and fixing the thickness, and drawing into round bars to obtain bamboo bars with the length of 180mm and the diameter of 8 mm;
s2, reverse equal-torque drilling forming: fixing the bamboo rod obtained in the S1 on a drilling platform, horizontally moving the centers of circles of two side surfaces of the bamboo rod at the rotation rate of 1800r/min respectively and at the speed of 30mm/S in a clockwise rotation drilling mode and a counterclockwise rotation drilling mode, stopping continuously moving when two drill bits reach positions 1mm away from the center of the bamboo rod respectively, keeping the two drill bits rotating in place, horizontally moving the drilling platform 2mm towards one end of the bamboo rod, horizontally moving the drilling platform 4mm towards the other end of the bamboo rod in the reverse direction, and horizontally withdrawing the two drill bits from the bamboo rod at the speed of 180mm/S to obtain a bamboo suction pipe preform with the wall thickness of 1 mm;
s3, performing slotting and carbonization inside the bamboo straw preform: uniformly carving 6 arc-shaped carved seams longitudinally on the inner wall of the bamboo suction pipe preform obtained in the step S2 by using a milling cutter with the diameter of 1mm, wherein the depth of the carved seams is 0.4mm, the carved seams are uniformly distributed on the inner wall of the bamboo suction pipe, inserting a hollow steam rod into the interior of the bamboo suction pipe preform, introducing water vapor with the temperature of 190 ℃ for 80min, carbonizing the inner wall of the bamboo suction pipe preform, and naturally cooling to room temperature to obtain a carbonized bamboo suction pipe; the outer diameter of the hollow steam rod is 6mm, the length of the hollow steam rod is telescopic, and the length adjusting range is 100 mm-250 mm;
s4, outer surface sterilization treatment: rolling the carbonized bamboo suction pipe obtained in the step S3 through an ultraviolet device, and sterilizing for 8S to obtain a carbonized mildew-proof cracking-proof bamboo suction pipe; the ultraviolet device is characterized in that 4 ultraviolet lamps with power of 20W are arranged in parallel according to the adjacent distance of 15 cm.
In the embodiment, the bamboo straw is prepared by drilling holes with reverse equal torque, so that the processing yield of the straw is improved, the production efficiency is improved, the application range of bamboo materials can be expanded, the wall thickness of the bamboo straw is reduced, and the weight of the bamboo straw is reduced; through inner wall slot and inner wall carbomorphism processing, promoted the anti fracture of bamboo straw and anti mildew performance, prolonged bamboo straw storage time to can realize the preparation of multiple colour straw through the adjustment to the carbomorphism parameter.
In the embodiment, the carbonization is realized by introducing water vapor at high temperature, so that the degradation of starch nutrient components and partial hemicellulose in the bamboo straw is reduced, and the effect of controlling internal mildew is achieved; in the embodiment, the inner wall of the preformed bamboo straw product is carbonized, so that the carbonization depth can be well controlled, the treatment time is greatly saved, the energy consumption is reduced, and more energy sources are consumed if the bamboo straw product is integrally carbonized. And the carbonization of the surface layer of the material is easy to cause by the whole carbonization, and the carbonization degree of the inner layer is not enough. The embodiment carries out the carbonization treatment to the inner wall of bamboo matter straw preform and can add bamboo timber hemicellulose, starch nutrient composition degradation, it is mouldy to reduce later stage product, the mould proof ability becomes good after the carbonization, the texture becomes hard, become crisp, the change of carbomorphism colour expresses the carbomorphism degree, the colour darkens and becomes dark, it is high to express the carbomorphism degree, can be according to the demand to hardness, control the carbomorphism degree, the straw carbonization back, the surface forms compact carbomorphism layer, has better high temperature resistance, bamboo matter straw inner wall is after the carbonization, surface stress reduces, the fracture characteristic has been reduced.
The prepared carbonized mildew-proof anti-cracking bamboo straw has the following properties: the length of the standard size is 180mm, the outer diameter is 8mm, the inner diameter is 6.6mm, and the mass of the straw is 1.53 g; the radial compression bearing capacity of the suction pipe is 40N, and the suction pipe has no deformation in a temperature resistance test (oil at 120 +/-5 ℃ and constant temperature for 30 min; boiling water for 30 min). The color difference of change (E ×) of the inner charred color was 55. A brightness (L) of 60; the anti-cracking capacity of the bamboo straw is circulated for 20 times in a steaming-drying cycle; antibacterial property: microorganisms such as coliform bacteria, salmonella and the like are not detected, and mould (CFU/g) is less than 3.
Example 2
The preparation method of the carbonized mildew-proof and cracking-proof bamboo straw comprises the following steps:
s1, preparing bamboo bars: cutting moso bamboos with the age of 5 years, cutting to a fixed length, fixing the width and splitting, selecting bamboo chips with the wall thickness of more than or equal to 7mm, removing tabasheer and fixing the thickness, and drawing into round bars to obtain bamboo bars with the length of 120mm and the diameter of 7 mm;
s2, reverse equal-torque drilling forming: fixing the bamboo rod obtained in the step S1 on a drilling platform, horizontally moving the centers of the two sides of the bamboo rod at a speed of 20mm/S at a rotation speed of 1500r/min in a clockwise rotation drilling mode and a counterclockwise rotation drilling mode respectively, stopping moving the two drill bits forward when the two drill bits reach positions 1mm away from the center of the bamboo rod respectively, keeping the two drill bits rotating in place, horizontally moving the drilling platform 2mm towards one end of the bamboo rod, horizontally moving the drilling platform 4mm towards the other end of the bamboo rod in the reverse direction, and horizontally withdrawing the two drill bits from the bamboo rod at a speed of 150mm/S to obtain a bamboo suction pipe preform with a wall thickness of 1.5 mm;
s3, performing slotting and carbonization inside the bamboo straw preform: uniformly carving 4 arc-shaped carved seams longitudinally on the inner wall of the bamboo suction pipe preform obtained in the step S2 by using a milling cutter with the diameter of 1mm, wherein the depth of the carved seams is 0.2mm, the carved seams are uniformly distributed on the inner wall of the bamboo suction pipe, inserting a hollow steam rod into the interior of the bamboo suction pipe preform, introducing water vapor with the temperature of 180 ℃ for 120min, carbonizing the inner wall of the bamboo suction pipe preform, and naturally cooling to room temperature to obtain a carbonized bamboo suction pipe; the outer diameter of the hollow steam rod is 5mm, the length of the hollow steam rod is telescopic, and the length adjusting range is 100 mm-250 mm;
s4, outer surface sterilization treatment: rolling the carbonized bamboo suction pipe obtained in the step S3 through an ultraviolet device, and sterilizing for 5S to obtain a carbonized mildew-proof cracking-proof bamboo suction pipe; the ultraviolet device is characterized in that 4 ultraviolet lamps with power of 20W are arranged in parallel according to the adjacent distance of 15 cm.
The prepared carbonized mildew-proof anti-cracking bamboo straw has the following properties: the length of the standard size is 120mm, the outer diameter is 7mm, the inner diameter is 5.8mm, and the mass of the straw is 1.22 g; the radial compression bearing capacity of the suction pipe is 30N, and the suction pipe has no deformation in a temperature resistance test (oil at 120 +/-5 ℃ and constant temperature for 30 min; boiling water for 30 min). The color difference of change (E) of the inner charred color was 42. A brightness (L) of 55; the bamboo straw is subjected to steaming-drying circulation for 25 times; antibacterial property: microorganisms such as coliform bacteria, salmonella and the like are not detected, and mould (CFU/g) is less than 3.
Example 3
The preparation method of the carbonized mildew-proof and cracking-proof bamboo straw comprises the following steps:
s1, preparing bamboo bars: cutting moso bamboos with the age of 7 years, cutting to a fixed length, fixing the width and splitting, selecting bamboo chips with the wall thickness of more than or equal to 9mm, removing tabasheer and fixing the thickness, and drawing into round bars to obtain bamboo bars with the length of 200mm and the diameter of 9 mm;
s2, reverse equal-torque drilling forming: fixing the bamboo rod obtained in the step S1 on a drilling platform, horizontally moving the centers of the two sides of the bamboo rod at the rotation rate of 2000r/min respectively, adopting a clockwise rotation drilling mode and a counterclockwise rotation drilling mode to the central point of the bamboo rod at the speed of 50mm/S respectively, stopping continuously moving when two drill bits reach the position 1mm away from the central point of the bamboo rod respectively, keeping the two drill bits rotating in place, horizontally moving the drilling platform to one end of the bamboo rod for 2mm, horizontally moving the drilling platform to the other end of the bamboo rod in the reverse direction for 4mm, and horizontally withdrawing the two drill bits from the bamboo rod at the speed of 200mm/S in the reverse direction to obtain a bamboo suction pipe preform with the wall thickness of 0.5 mm;
s3, performing slotting and carbonization inside the bamboo straw preform: uniformly carving 8 arc-shaped carved seams longitudinally on the inner wall of the bamboo suction pipe preform obtained in the step S2 by using a milling cutter with the diameter of 1mm, wherein the depth of the carved seams is 0.5mm, the carved seams are uniformly distributed on the inner wall of the bamboo suction pipe, inserting a hollow steam rod into the interior of the bamboo suction pipe preform, introducing water vapor with the temperature of 200 ℃ for 30min, carbonizing the inner wall of the bamboo suction pipe preform, and naturally cooling to room temperature to obtain a carbonized bamboo suction pipe; the outer diameter of the hollow steam rod is 8mm, the length of the hollow steam rod is telescopic, and the length adjusting range is 100 mm-250 mm;
s4, outer surface sterilization treatment: rolling the carbonized bamboo straw obtained in the step S3 through an ultraviolet device, and sterilizing for 10S to obtain a carbonized mildew-proof cracking-proof bamboo straw; the ultraviolet device is characterized in that 4 ultraviolet lamps with power of 20W are arranged in parallel according to the adjacent distance of 15 cm.
The prepared carbonized mildew-proof anti-cracking bamboo straw has the following properties: the length of the standard dimension is 200mm, the outer diameter is 9mm, the inner diameter is 7.4mm, and the mass of the straw is 1.61 g; the radial compression bearing capacity of the suction pipe is 40N, and the suction pipe has no deformation in a temperature resistance test (oil at 120 +/-5 ℃ and constant temperature for 30 min; boiling water for 30 min). The color difference of change (E x) of the inner charred color was 50. A brightness (L) of 55; the anti-cracking capacity of the bamboo straw is circulated for 20 times in a steaming-drying cycle; antibacterial property: microorganisms such as coliform bacteria, salmonella and the like are not detected, and mould (CFU/g) is less than 3.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (6)
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