Polycarbonate composite material capable of being sterilized by ionizing radiation as well as preparation method and application of polycarbonate composite material

Abstract

The invention discloses a polycarbonate composite material capable of being subjected to ionizing radiation sterilization as well as a preparation method and application thereof. The polycarbonate composite material capable of being subjected to ionizing radiation sterilization is prepared from the following raw materials in parts by weight: 50 to 100 parts of aromatic polycarbonate, 0.1 to 10 parts of polyether or polyether derivative, 0.1 to 10 parts of impact modifier and 0.01 to 2 parts of o-benzoyl sulfimide, through selection of the raw material components, the prepared polycarbonate composite material capable of being subjected to ionizing radiation sterilization has a relatively low yellowing index and excellent mechanical properties after irradiation, and the problems that the yellowing index is too high and the mechanical properties are reduced after irradiation of an existing polycarbonate material are solved.

Description

Technical Field

[0001] The invention relates to the technical field of polymer composite materials, and in particular to a polycarbonate composite material capable of being sterilized by ionizing radiation, a preparation method and an application thereof. Background Art

[0002] A suitable material for medical technology products is polycarbonate material. Polycarbonate material, a material with polycarbonate as the main component. Polycarbonate is an amorphous polymer that becomes a transparent glass-like substance after melting and cooling, and has excellent optical and mechanical properties. Polycarbonate material has a high melting point, is also resistant to low temperatures, has low water absorption, has good impact resistance, insulation and aging resistance, and can withstand inorganic and organic dilute acids. Products made from it are relatively cheap, can be easily produced by injection molding or extrusion, and can have a variety of forms. Polycarbonate material can be obtained in transparent, translucent and opaque forms. The material has high breaking strength and high stiffness, high heat deformation temperature and good dimensional stability, all of which make it a very suitable material for many medical technology applications.

[0003] Products for medical use are usually delivered in the form of sterile products, which means that they must go through a sterilization process to maintain sterility before being delivered to the consumer. The respective packaging can be opened at the time of use and the medical technology device can be used thereby. On-site sterilization of unpackaged products (for example, in the same hospital) is not suitable for many products because the risk of contamination is involved until the final use. Therefore, products for single and multiple use need to be sterilized before their first application. This is usually done with the aid of ionizing radiation, which is a very effective way and does not require any additional steps. With the aid of radiation sterilization, it is allowed to sterilize the medical technology product in its closed packaging, and thus ensure the highest possible sterility. The product remains sterile until the package is opened immediately before its use. Typically, a radiation dose of 25 to 100 kGy is used, and several products can be sterilized at the same time.

[0004] When articles made from aromatic polycarbonate-based compositions are irradiated, yellowing of the polycarbonate material occurs, which becomes more intense with increasing radiation dose, due to degradation and rearrangement reactions.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a polycarbonate composite material that can be sterilized by ionizing radiation, a preparation method and an application thereof. The present invention selects various raw material components so that the prepared polycarbonate composite material that can be sterilized by ionizing radiation has a lower yellowing index and excellent mechanical properties after irradiation, thereby solving the problem that the yellowing index of existing polycarbonate materials is too high and the mechanical properties are reduced after irradiation.

[0007] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0008] The first aspect of the present invention provides a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0009] 50-99.5 parts of aromatic polycarbonate, 0.1-10 parts of polyether or polyether derivative, 0.1-10 parts of impact modifier and 0.01-2 parts of o-benzoylsulfonimide.

[0010] The polycarbonate composite material of the invention has the advantages of radiation resistance, excellent rigidity and toughness, and the manufactured parts have high visible light transmittance and good appearance, and can meet the quality requirements of various processing techniques and post-assembly.

[0011] Preferably, the polycarbonate composite material sterilizable by ionizing radiation comprises the following raw materials in parts by weight:

[0012] 69.75-98.75 parts of aromatic polycarbonate, 0.1-2.5 parts of polyether or polyether derivative, 0.1-5 parts of impact modifier and 0.05-1.5 parts of o-benzoylsulfonimide.

[0013] Preferably, the polycarbonate composite material sterilizable by ionizing radiation comprises the following raw materials in parts by weight:

[0014] 90.5-97.5 parts of aromatic polycarbonate, 0.5-1.5 parts of polyether or polyether derivative, 0.5-2 parts of impact modifier and 0.05-1 part of o-benzoylsulfonimide.

[0015] Preferably, the raw material further comprises 0.01 to 30 parts of additives;

[0016] The additive is selected from at least one of flame retardants, anti-dripping agents, fillers, antistatic agents, colorants, pigments, heat stabilizers, lubricants, mold release agents, UV absorbers, IR absorbers, hydrolysis stabilizers and plasticizers.

[0017] Preferably, the heat stabilizer is a phosphorus-based and / or phenolic heat stabilizer; the anti-dripping agent may be a fluorinated olefin compound, such as polytetrafluoroethylene; the lubricant may be a stearic acid lubricant, more preferably pentaerythritol stearate.

[0018] Preferably, the filler may be at least one of chalk, quartz powder, titanium dioxide, silicate, aluminosilicate, talc, wollastonite and montmorillonite, and may also be at least one of kaolin, zeolite, vermiculite, alumina and silicon dioxide modified by ion exchange.

[0019] Preferably, the colorant or pigment can be a sulfur-containing pigment such as cadmium red or cadmium yellow, a ferrocyanide-based pigment such as Prussian blue, an oxide pigment such as titanium dioxide, zinc oxide, red iron oxide, black iron oxide, chromium oxide, titanium yellow, zinc-iron-based brown, titanium-cobalt-based green, cobalt blue, copper-chromium-based black, copper-iron-based black or a chromium-based pigment such as chrome yellow, a phthalocyanine-based colorant such as copper-phthalocyanine blue or copper-phthalocyanine green, a sulfur-indigo colorant, a pyrenone-based, perylene-based, quinacridone-based, dioxazine-based, isoindolinone-based and quinophthalone-based derivative, anthraquinone-based, heterocyclic system.

[0020] In the present invention, a blue and / or blue-violet colorant is used which compensates for the visual yellow perception caused by radiation damage. More preferably, the colorant is selected from cyanine, quinolone, anthraquinone or phthalocyanine-derivatives.

[0021] Preferably, the UV absorber is one having as low a transmittance as possible below 400 nm and as high a transmittance as possible above 400 nm. Particularly suitable UV absorbers are hydroxybenzotriazoles, such as 2-(3',5'-bis(1,1-dimethylbenzyl)-2'-hydroxyphenyl)benzotriazole, 2-(2'-hydroxy-5'-(tert-octyl)phenyl)benzotriazole, bis(3-(2H-benzotriazolyl)-2-hydroxy-5-tert-octyl)methane, 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-(hexyloxy)phenol, and benzophenones such as 2,4-dihydroxybenzophenone and 2-hydroxy-4-(octyloxy)benzophenone. Particularly preferred are triazine UV absorbers, and mixtures of these UV absorbers may also be used.

[0022] Preferably, the weight average molecular weight of the aromatic polycarbonate is 10000 to 50000 g / mol;

[0023] The aromatic polycarbonate is aromatic bisphenol A polycarbonate or aromatic bisphenol A polycarbonate containing siloxane copolymer.

[0024] Preferably, the weight average molecular weight of the polyether or polyether derivative is 400 to 8000 g / mol;

[0025] The polyether or polyether derivative includes PEG or a fully capped derivative obtained by esterifying or chlorinating the terminal hydroxyl groups of PEG.

[0026] Preferably, the impact modifier is selected from at least one of ABS, MBS and EBA.

[0027] The second aspect of the present invention provides a method for preparing the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation, and the preparation method comprises the following steps:

[0028] (a) weighing each raw material according to weight;

[0029] (b) mixing the raw materials to obtain a premix;

[0030] (c) putting the premix into a twin-screw extruder for melt blending, extruding, drawing, cooling, drying, and pelletizing to obtain the polycarbonate composite material that can be sterilized by ionizing radiation

[0031] Preferably, the control parameters of the twin-screw extruder are as follows:

[0032] The screw speed is 200-600r / min, the temperature is 250-300°C, and the vacuum degree is -0.07-0.08MPa.

[0033] The third aspect of the present invention provides a use of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation in the preparation of medical technology products or components.

[0034] Preferably, the components include dialyzer components, oxygenator components, tubing connectors, miscellaneous connectors, blood pump components, infusion valve connectors, syringes, intravenous access components, surgical instruments, two-way valves and reversing valves.

[0035] Compared with the prior art, the beneficial effects of the present invention include at least:

[0036] In the polycarbonate composite material sterilizable by ionizing radiation of the present invention, a combination of benzoylsulfonimide and polyether or polyether derivative is used as a stabilizer for polycarbonate composite materials, and ethylene-butyl acrylate copolymer is used as an impact modifier to significantly improve the problems of high yellowing index and decreased mechanical properties of polycarbonate after irradiation. Specifically, after a 3mm thick test piece of the polycarbonate composite material sterilizable by ionizing radiation of the present invention is irradiated with 30kGy and placed under natural light for 15 days, the difference in yellowing index between that before radiation sterilization is less than 13, and the polycarbonate composite material still has excellent visible light transmittance and mechanical properties. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0038] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0039] The raw materials used in the following examples are as follows:

[0040] Aromatic polycarbonate: from Puyang Shengtong Juyuan New Materials Co., Ltd. -PC-8285. Based on bisphenol A polycarbonate, with a test temperature of 300°C and a load of 1.2 kg and a 10.0 cm 3 / 10min melt volume flow rate MVR.

[0041] Polyether or polyether derivative: a polyether end-capped derivative from Jiangsu Haian Petrochemical Company, brand PEG-3000, with a weight average molecular weight of about 3000 g / mol.

[0042] Impact modifier: EBA (ethylene-butyl acrylate copolymer) from DuPont, USA, brand Elvaloy PTW.

[0043] o-Benzoylsulfonyl imide: o-Benzoylsulfonyl imide from Shanghai MacLean Biochemical Technology Co., Ltd., CAS registration number 81-07-2.

[0044] The colorant is cobalt blue colorant.

[0045] Example 1

[0046] This embodiment is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation includes the following raw materials in parts by weight:

[0047] 97.999 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative, 0.5 parts of impact modifier, 0.75 parts of o-benzoylsulfonimide and 0.001 parts of colorant.

[0048] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0049] (a) weighing each raw material according to weight;

[0050] (b) mixing the raw materials to obtain a premix;

[0051] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0052] Example 2

[0053] This embodiment is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation includes the following raw materials in parts by weight:

[0054] 97.499 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative, 1 part of impact modifier, 0.75 parts of o-benzoylsulfonimide and 0.001 parts of colorant.

[0055] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0056] (a) weighing each raw material according to weight;

[0057] (b) mixing the raw materials to obtain a premix;

[0058] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0059] Example 3

[0060] This embodiment is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation includes the following raw materials in parts by weight:

[0061] 96.999 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative, 1.5 parts of impact modifier, 0.75 parts of o-benzoylsulfonimide and 0.001 parts of colorant.

[0062] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0063] (a) weighing each raw material according to weight;

[0064] (b) mixing the raw materials to obtain a premix;

[0065] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0066] Comparative Example 1

[0067] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0068] Aromatic polycarbonate 99.999 parts and colorant 0.001 parts.

[0069] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0070] (a) weighing each raw material according to weight;

[0071] (b) mixing the raw materials to obtain a premix;

[0072] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0073] Comparative Example 2

[0074] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0075] 99.249 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative and 0.001 parts of colorant.

[0076] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0077] (a) weighing each raw material according to weight;

[0078] (b) mixing the raw materials to obtain a premix;

[0079] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0080] Comparative Example 3

[0081] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0082] 99.149 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative, 0.1 parts of o-benzoylsulfonyl imide and 0.001 parts of colorant.

[0083] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0084] (a) weighing each raw material according to weight;

[0085] (b) mixing the raw materials to obtain a premix;

[0086] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0087] Comparative Example 4

[0088] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0089] 50-100 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative, 0.5 parts of o-benzoylsulfonimide and 0.001 parts of colorant.

[0090] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0091] (a) weighing each raw material according to weight;

[0092] (b) mixing the raw materials to obtain a premix;

[0093] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0094] Comparative Example 5

[0095] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0096] 98.499 parts of aromatic polycarbonate, 0.75 parts of polyether or polyether derivative, 0.75 parts of o-benzoylsulfonimide and 0.001 parts of colorant.

[0097] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0098] (a) weighing each raw material according to weight;

[0099] (b) mixing the raw materials to obtain a premix;

[0100] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0101] Comparative Example 6

[0102] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0103] 99.249 parts of aromatic polycarbonate, 0.75 parts of o-benzoylsulfonyl imide and 0.001 parts of colorant.

[0104] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0105] (a) weighing each raw material according to weight;

[0106] (b) mixing the raw materials to obtain a premix;

[0107] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0108] Comparative Example 7

[0109] This comparative example is a polycarbonate composite material that can be sterilized by ionizing radiation. The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight:

[0110] 98.25 parts of aromatic polycarbonate, 1 part of impact modifier, 0.75 parts of o-benzoylsulfonyl imide and 0.001 parts of colorant.

[0111] The preparation method of the above-mentioned polycarbonate composite material that can be sterilized by ionizing radiation comprises the following steps:

[0112] (a) weighing each raw material according to weight;

[0113] (b) mixing the raw materials to obtain a premix;

[0114] (c) The premix is ​​fed into a twin-screw extruder ZSE 27CC 40D produced by Leistritz Company, and melt-blended, extruded, stretched, cooled, dried, and pelletized at a processing rate of 20 kg / h, a rotation speed of 200 r / min, and a temperature of 280° C. and a vacuum degree of 0.05 MPa to obtain the polycarbonate composite material sterilizable by ionizing radiation.

[0115] Experimental example

[0116] The polycarbonate composite materials sterilizable by ionizing radiation prepared in the above-mentioned embodiment and comparative example were obtained respectively; then, the color sample was injection molded on a Haitian injection molding machine. The process temperature during the injection molding process was 280°C, and the mold temperature was 80°C. The yellowness index (YI) of the sample with a wall thickness of 3 mm was measured using an X-Rite colorimeter device, forming a difference ΔY.I. between the value 15 days after irradiation and the value before irradiation; the measurement results are shown in Table 1;

[0117] Specific irradiation method for the sample:

[0118] Gamma radiation (generated with the aid of a Co60 source): very high penetration depth and relatively low dose rate → Duration of the sterilization process: several hours until the desired dose (30 kGy) is reached, which is tracked with the aid of a dosimeter. ;

[0119] The melt volume flow rates of the polycarbonate composite materials sterilizable by ionizing radiation prepared in different embodiments and comparative examples were tested, and the test results are shown in Table 1;

[0120] The ISO 180A test method was used to test the Izod notched impact strength of the corresponding samples of the polycarbonate composite materials of different embodiments and comparative examples at an ambient temperature of 23° C. The test results are shown in Table 1.

[0121] Table 1

[0122]

[0123]

[0124] From Table 1, we can see that:

[0125] The addition of polyether or polyether derivative in Comparative Examples 1-2 can significantly reduce the difference ΔY.I. between the value before irradiation and the value 15 days after irradiation of the polycarbonate composite material. The polycarbonate stabilizer composed of polyether or polyether derivative and o-benzoylsulfonyl imide in Comparative Examples 3-5 has a more obvious effect of reducing ΔY.I. before and after irradiation, but as the proportion of o-benzoylsulfonyl imide in the polycarbonate composition increases, the impact strength of the polycarbonate composition decreases sharply.

[0126] The introduction of ethylene-butyl acrylate copolymer in Examples 1 to 3 of the present invention can improve the problem of decreased impact resistance of the polycarbonate composition due to the increase of o-benzoylsulfonyl imide component. As the content of component C increases, the impact resistance of the polycarbonate composition becomes stronger and stronger.

[0127] In summary, the polycarbonate composite material prepared by the embodiment of the present invention is prepared by combining various raw materials in different proportions. After taking a 3mm thick test piece and irradiating it with 30kGy, it is placed under natural light for 15 days. The difference in yellowing index between that before radiation sterilization is less than 13, and it still has excellent visible light transmittance and mechanical properties. This polycarbonate composition that can be sterilized by ionizing radiation meets the application in the preparation of medical technology products or medical technology product parts.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A polycarbonate composite material sterilizable by ionizing radiation, characterized in that: The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight: 50-100 parts of aromatic polycarbonate, 0.1-10 parts of polyether or polyether derivative, 0.1-10 parts of impact modifier and 0.01-2 parts of o-benzoylsulfonimide.

2. The polycarbonate composite material sterilizable by ionizing radiation according to claim 1, characterized in that: The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight: 69.75-98.75 parts of aromatic polycarbonate, 0.1-2.5 parts of polyether or polyether derivative, 0.1-5 parts of impact modifier and 0.05-1.5 parts of o-benzoylsulfonimide.

3. The polycarbonate composite material sterilizable by ionizing radiation according to claim 1, characterized in that: The polycarbonate composite material that can be sterilized by ionizing radiation comprises the following raw materials in parts by weight: 90.5-97.5 parts of aromatic polycarbonate, 0.5-1.5 parts of polyether or polyether derivative, 0.5-2 parts of impact modifier and 0.05-1 part of o-benzoylsulfonimide.

4. The polycarbonate composite material sterilizable by ionizing radiation according to any one of claims 1 to 3, characterized in that: The raw material also includes 0.01 to 30 parts of additives; The additive is selected from at least one of flame retardants, anti-dripping agents, fillers, antistatic agents, colorants, pigments, heat stabilizers, lubricants, mold release agents, UV absorbers, IR absorbers, hydrolysis stabilizers and plasticizers.

5. The polycarbonate composite material sterilizable by ionizing radiation according to claim 1, characterized in that: The weight average molecular weight of the aromatic polycarbonate is 10000 to 50000 g / mol; The aromatic polycarbonate is aromatic bisphenol A polycarbonate or aromatic bisphenol A polycarbonate copolymerized with siloxane.

6. The polycarbonate composite material sterilizable by ionizing radiation according to claim 1, characterized in that: The weight average molecular weight of the polyether or polyether derivative is 400 to 8000 g / mol; The polyether or polyether derivative includes PEG or a fully capped derivative obtained by esterifying or chlorinating the terminal hydroxyl groups of PEG.

7. The polycarbonate composite material sterilizable by ionizing radiation according to claim 1, characterized in that: The impact modifier is selected from at least one of ABS, MBS and EBA.

8. The method for preparing the polycarbonate composite material sterilizable by ionizing radiation according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: (a) weighing each raw material according to weight; (b) mixing the raw materials to obtain a premix; (c) feeding the premix into a twin-screw extruder for melt blending, extruding, drawing, cooling, drying, and pelletizing to obtain the polycarbonate composite material that can be sterilized by ionizing radiation.

9. The preparation method according to claim 8, characterized in that: The control parameters of the twin-screw extruder are as follows: The screw speed is 200-600r / min, the temperature is 250-300°C, and the vacuum degree is -0.07-0.08MPa.

10. Use of the polycarbonate composite material sterilizable by ionizing radiation according to any one of claims 1 to 7 in the preparation of medical technology products or components.

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