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CN-122008655-A - Cross-layer gallium-based alloy synergistic heat conduction micro-hook puncture-proof inner core and preparation method and application thereof

CN122008655ACN 122008655 ACN122008655 ACN 122008655ACN-122008655-A

Abstract

The invention discloses a cross-layer gallium-based alloy synergistic heat conduction micro-hook stab-resistant inner core, a preparation method and application thereof, wherein the micro-hook stab-resistant inner core is formed by bonding and fixing a heat dissipation layer and a stab-resistant layer through a composite adhesive; the heat dissipation layer is non-woven fabric loaded with gallium-based alloy particles and heat conducting filler, the surface of the heat dissipation layer is coated with an insulating layer, the stab-resistant layer is a modified UHMWPE micro-hook structure nail with a micro-hook array, and the composite adhesive takes solvent-free UV cured PU as a base material and is added with gallium-based alloy particles. According to the invention, a three-dimensional composite system of a heat dissipation layer, an anti-puncture layer and a cross-layer gallium-based alloy is constructed, interlayer stability is enhanced by means of physical anchoring of a micro-hook array, a continuous heat conduction network is constructed by cross-layer gallium-based alloy particles, the cooperation of anti-puncture, heat conduction and adhesion functions is realized, and the prepared micro-hook anti-puncture inner core integrates high-efficiency cross-layer heat conduction, high-strength anti-puncture, excellent flexibility and reliable insulation, and meets the severe requirements of special protection scenes such as armies, security and the like.

Inventors

  • LIU JINXIN
  • JIA XIAOCHEN
  • LIU YUQING
  • ZHOU JINGPING

Assignees

  • 苏州大学

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. The preparation method of the cross-layer gallium-based alloy synergistic heat conduction micro-hook stab-resistant inner core is characterized by comprising the following steps of: (1) The method comprises the steps of taking a high polymer elastomer solution as a core layer spinning solution, taking the high polymer elastomer concentration in the core layer spinning solution as 15-20 wt%, taking the high polymer elastomer solution containing a heat conducting filler as a shell layer spinning solution, taking the high polymer elastomer concentration in the shell layer spinning solution as 15-20 wt% and the heat conducting filler concentration as 10-22-wt%, adopting a coaxial electrostatic spinning device to spin the core layer spinning solution and the shell layer spinning solution, synchronously spraying gallium-based alloy particles on formed fibers in situ after spinning is started to enable the gallium-based alloy particles to be embedded into fiber gaps, and carrying out prestretching treatment, plasma surface modification treatment and compression molding on the obtained fiber layer after spinning is finished to obtain a non-woven fabric, carrying out surface modification treatment on the non-woven fabric, then coating an insulating layer, and solidifying to obtain a heat dissipation layer; (2) Forming a micro-hook structure first sheet with a micro-hook array on the bonding surface by using ultra-high molecular weight polyethylene added with a hydroxyl grafting modifier as a base material through laser engraving processing to obtain an anti-puncture layer; (3) Adding gallium-based alloy particles into ultraviolet curing polyurethane, uniformly mixing to obtain a composite adhesive, wherein the particle size of the gallium-based alloy particles is 1-5 mu m, bonding the insulating layer of the heat dissipation layer obtained in the step (1) and the surface of the micro-hook of the stab-resistant layer obtained in the step (2) by adopting the composite adhesive, and obtaining the cross-layer gallium-based alloy synergistic heat conduction micro-hook stab-resistant inner core after pressurizing and compounding treatment and ultraviolet curing treatment.
  2. 2. The preparation method of claim 1, wherein in the step (1), the high molecular elastomer is a mixture of polycaprolactone and a styrene-butadiene-styrene block copolymer, the mass ratio of the polycaprolactone to the styrene-butadiene-styrene block copolymer is (2-4) 1, the heat conducting filler is boron nitride nano-sheets modified by surface grafting hydroxyl groups or amino groups, the thickness of the boron nitride nano-sheets is 5-10 nm, the material of the insulating layer is heat conducting organic silicon insulating paint, the heat conducting organic silicon insulating paint consists of nano-alumina and methyl phenyl silicone resin, wherein the content of the nano-alumina is 8-12 wt%, and the particle size is 45-55 nm.
  3. 3. The method according to claim 1, wherein in the step (1), the spinning process parameters are voltage 20-25 kV, receiving distance 15-25 cm, extrusion rate of core layer spinning solution 0.2-0.4 mL/h, extrusion rate of shell layer spinning solution 0.5-0.6 mL/h, rotational speed of receiving roller 1-3 r/min, ambient temperature 20-35 ℃ and relative humidity 45-55%.
  4. 4. The method according to claim 1, wherein in the step (1), the synchronous in-situ spraying is performed by adopting a multi-nozzle spraying device, wherein the spraying technological parameters are that the distance between a nozzle and a receiving roller is 5-10 cm, the spraying pressure is 0.2-0.3 MPa, and the spraying flow is 1.0-1.5 g/h.
  5. 5. The method according to claim 1, wherein in the step (1), the pre-stretching treatment is performed by stretching the fiber layer 5-10% in the longitudinal direction, and releasing the fiber layer at a speed of 0.4-0.6 mm/s after maintaining the fiber layer 5-15 min, the plasma surface modification treatment is performed by introducing argon gas at a flow rate of 5-15L/min into the treatment environment, setting the power to 70-90W, and continuously treating the fiber layer 5-10 s, and the press forming is performed by pressing the fiber layer 5-10 MPa with a flat press and maintaining the pressing force 5-10 min.
  6. 6. The preparation method of the fiber according to claim 1, wherein in the step (2), the mass ratio of the ultra-high molecular weight polyethylene fiber to the hydroxyl grafting modifier is 1 (0.02-0.05), the hydroxyl grafting modifier is a silane coupling agent, the height of the micro hooks of the micro hook array is 50-100 μm, the micro hooks are in a barb-shaped structure, the micro hooks are arranged in a rectangular array, the row spacing is 0.5-1 mm, the column spacing is 0.3-0.8 mm, and the arrangement density is 20-50 per cm 2 .
  7. 7. The method according to claim 1, wherein in the step (3), the mass ratio of the ultraviolet-curable polyurethane to the gallium-based alloy particles is 1 (0.05-0.08).
  8. 8. The method according to claim 1, wherein in the step (3), the ultraviolet curing treatment is performed by irradiation with 365 nm ultraviolet curing lamps for 30 to 60s hours.
  9. 9. A cross-layer gallium-based alloy synergistic thermally conductive microhook stab-resistant core prepared by the preparation method of any one of claims 1-8.
  10. 10. Use of the cross-layer gallium-based alloy synergistic thermally conductive microhook stab resistant core of claim 9 in stab resistant equipment or protective apparel.

Description

Cross-layer gallium-based alloy synergistic heat conduction micro-hook puncture-proof inner core and preparation method and application thereof Technical Field The invention relates to the technical field of protective materials, in particular to a cross-layer gallium-based alloy synergistic heat conduction micro-hook stab-resistant inner core, and a preparation method and application thereof. Background The stab-resistant inner core is used as a core functional component of special scenes such as arming and police equipment, security protection clothing and the like, and has excellent stab-resistant performance and good wearing comfort, and the comprehensive performance of the stab-resistant inner core directly influences the actual combat application effect of the protection equipment. However, the design of the traditional stab-resistant inner core mostly takes the reinforced stab-resistant performance as a core, and densification structures such as a high-density ultra-high molecular weight polyethylene (UHMWPE) lamination and metal grid lamination are generally adopted, so that the structure can realize the basic stab-resistant function, but seriously hinders heat conduction and emission, so that the problems of lack of heat dissipation capability, easy induction of stuffy feeling, uncomfortable body feeling and the like are caused when the structure is worn for a long time, and the wearing experience is greatly reduced. In order to meet the heat dissipation requirement, part of the design is improved by simply punching or compounding the common breathable fabric, but the punching treatment can damage the structural integrity of the anti-puncture layer, so that the anti-puncture strength is greatly reduced, the composite design of the common breathable fabric and the anti-puncture layer has the defect of insufficient interlayer binding force, layering and falling easily occur, and the dual core requirements of high-strength anti-puncture and high-efficiency heat dissipation are always difficult to meet simultaneously. In order to balance the stab-resistant and heat-dissipating performance of the stab-resistant inner core, chinese patent CN119243357A discloses a technical scheme of compounding mesoporous WO 3 and hydroxylated BN nano material in UHMWPE fibers, so that the heat conductivity of the material is improved by more than 20% compared with that of pure UHMWPE, the heat conductivity is enhanced to a certain extent, chinese patent CN114347598A is used for compounding UHMWPE short fibers and viscose fibers into cloth after needling, a basic ventilation channel is constructed by utilizing fiber pores, a path is provided for heat dissipation, and Chinese patent CN119800606A is used for preparing a polyvinylidene fluoride (PVDF)/titanium dioxide aerogel composite porous membrane through electrostatic spinning, so that the moisture permeability of the material is more than or equal to 5000 g/(m 2.24 h), and the heat dissipating efficiency of a heat dissipation layer is effectively improved. However, the prior art still has obvious short plates, breakthrough progress in the aspects of cooperative improvement of the stab-resistant strength and the heat dissipation efficiency, continuity of interlayer heat conduction and integration of structural stability is not realized, comprehensive upgrading of the comprehensive performance of the stab-resistant inner core cannot be achieved, and severe requirements of special protection scenes on high performance and high reliability of equipment are difficult to meet. Disclosure of Invention The invention aims to solve the technical problems that the puncture-proof performance and the heat dissipation efficiency of the traditional puncture-proof inner core are difficult to cooperatively balance, a heat conduction fault is easily formed due to discontinuous interlayer heat conduction system, and layering and falling are easily caused due to insufficient interlayer bonding force. The above object of the present invention is achieved by the following technical solutions: The invention provides a preparation method of a cross-layer gallium-based alloy synergistic heat conduction micro-hook stab-resistant inner core, which comprises the following steps: (1) The method comprises the steps of taking a high polymer elastomer solution as a core layer spinning solution, taking the high polymer elastomer concentration in the core layer spinning solution as 15-20 wt%, taking the high polymer elastomer solution containing a heat conducting filler as a shell layer spinning solution, taking the high polymer elastomer concentration in the shell layer spinning solution as 15-20 wt% and the heat conducting filler concentration as 10-22-wt%, adopting a coaxial electrostatic spinning device to spin the core layer spinning solution and the shell layer spinning solution, synchronously spraying gallium-based alloy particles on formed fibers in situ after spinning is started to enable the