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3D printing antibacterial product

An antibacterial agent and 3D printing technology, applied in the field of preparing 3D printing products with antibacterial activity, can solve the problems of increasing additional costs and high manufacturing costs

Pending Publication Date: 2021-02-05
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although there have been attempts to use the DLP method to prepare antimicrobial materials for dental applications (Sa, L., Kaiwu, L., Shenggui, C., Junzhong, Y., Yongguang, J., Lin, W. and Li, R. (2019). "3D printing dental composite resins with sustaining antibacterial ability". "Journal of materials science", 54(4), 3309-3318), but This approach requires the use of silver nitrate / nanotechnology in advanced nanotechnology laboratories and cannot be performed in conventional 3D printing equipment
This nanotechnology is expected to require high manufacturing costs
Furthermore, to ensure the safe use of nanoparticles in production, users will require a higher degree of safety precautions and thus add additional cost to the application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] Example 1: Parallel dash test

[0066] Two 3D printed materials were tested to determine the inhibitory effect of the 3D printed materials prepared using the methods of the present disclosure. Two bacteria commonly found in the environment were tested -- Staphylococcus aureus (S. aureus) (Gram-positive) and K. pneumoniae (Gram-negative).

[0067] The test for antimicrobial efficacy is based on a modified method of AATCC test method 147, which is also known as the parallel streak test. This method is useful for obtaining a rough estimate of activity because the growth of the inoculum organism decreases from one end of each streak to the other and from one streak to the next, allowing for increased sensitivity. The size of the zone of inhibition and the narrowing of the scribe line by the presence of the antimicrobial agent allows estimation of residual antimicrobial activity after multiple washes (AATCC).

[0068] In this test, an ABS-based UV-sensitive resin was selec...

example 2

[0076] Example 2: Surface wear test

[0077] Perform surface wear tests to determine antimicrobial activity inside 3D printed products. PHMB (10% by weight) and Zinc Oxide (2.5% by weight) were added to HTM 140 resin and printed by the method of the present disclosure using DLP technology and before the samples were subjected to the modified AATCC Test Method 147 as described above Use a cutter to scrape off the surface of the printed material. Place the abraded surface down (contacting the Petri dish).

[0078] After culturing Klebsiella pneumoniae with the samples, a width of inhibition of 0.067 was observed, thus demonstrating the antibacterial effect of the interior of the 3D printed material against Klebsiella pneumoniae.

example 3

[0079] Example 3: Parallel streak testing of samples formed with mixtures

[0080] The experiments were repeated using ABS-tough, another 3D printing resin with some inherent basic antimicrobial functions. The resin was mixed with a significantly smaller amount of water-based PHMB (1% by net weight).

[0081] Instead of using an ultrasonic mixer, alcohol is used as a mixing agent to improve the mixing quality. The modified AATCC test method 147 was repeated, and the results showed that the 3D printed samples showed a stronger antibacterial effect against Staphylococcus aureus, while all samples did not allow bacteria to grow on the samples. This indicates that the surface of the sample has an effective antibacterial function.

[0082] Figure 8 and 9 demonstrates the activity of 3D printed sample materials prepared with resin integrated with different amounts of PHMB at a ratio of 1:1 with and without worn surfaces before testing Combine with 99% ethanol. Figure 8 depic...

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Abstract

The present disclosure provides a method for preparing an antibacterial 3D printing material, wherein the antibacterial agent is integrated with the 3D printing material. The 3D printing material manufactured by the method of the present disclosure contains one or more antibacterial agents that are completely integrated in the entire product and exhibit antibacterial effects in the entire product,and the one or more antibacterial agents are resistant to daily wear and tear.

Description

technical field [0001] The present invention relates to antibacterial three-dimensional (3D) printing materials and methods for preparing 3D printed products with antibacterial activity. Background technique [0002] Infectious diseases can often be spread by means including respiratory droplets and contaminated surfaces. In the context of the COVID-19 pandemic, the Centers for Disease Control and Prevention (CDC) proposes that people may become infected with COVID- 19. As a result, efforts have been made to sanitize surfaces shared by the public, particularly the common areas of hotels and large residential complexes seen in Asian cities (e.g., Hong Kong), where tens of thousands of people share common areas containing the same door handles, elevator buttons, etc. panels and other surfaces. However, due to the limited manpower available to clean such high-risk areas, there is a need to prepare surfaces with enhanced antimicrobial properties to limit skin contact contamin...

Claims

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Application Information

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IPC IPC(8): C08L55/02C08L79/00C08K3/22B33Y70/00B33Y70/10B33Y80/00
CPCC08L55/02C08K3/22B33Y70/00B33Y70/10B33Y80/00C08K2003/2296C08L79/00C08K2003/2286C08K2003/2241C08K5/136C08K5/19C08K5/0058B33Y10/00C08K3/015C08L79/02B29C64/124C09D7/65C09D7/61C09D7/80B29K2055/02B29K2105/0035C09D5/14C09D155/02
Inventor 卢君宇简志伟
Owner THE HONG KONG POLYTECHNIC UNIV
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