纳米TiO_(2)对口腔粘结剂性能的影响研究

Effect of nano TiO_(2) on the performance of oral adhesive

以2,4,6-三甲基苯甲酰基-二苯基氧化膦为光引发剂,甲基丙烯酸甲酯为单体,白炭黑为补强填料,纳米二氧化钛(TiO_(2))颗粒为抗菌填料,制备了口腔粘结剂。研究了纳米TiO_(2)尺寸、用量对粘结剂力学性能和抗菌性能的影响。研究结果表明:(1)纳米TiO_(2)尺寸是影响粘结剂力学性能的重要因素,选用粒径为30 nm的TiO_(2)进行填充较为适宜;(2)纳米TiO_(2)添加量是影响粘结剂力学性能的另一个重要因素。当TiO_(2)添加量为5.0%时,粘结剂的力学性能提升最显著。(3)纳米TiO_(2)的尺寸和添加量是影响抗菌性能的重要因素。当粘结剂中纳米TiO_(2)的粒径为30 nm,添加质量分数为5.0%时,抗菌率达到97.46%,满足行业抗菌率标准的要求。

The oral adhesive was prepared by using 2,4,6-trimethylbenzoyl diphenyl phosphine oxide as the photoinitiator,methyl methacrylate as the monomer,white carbon black as the reinforcing filler,and nano titanium dioxide(TiO_2) particles as the antibacterial filler.The effects of nano TiO_(2) size and addition amount on the mechanical and antibacterial properties of the adhesive were studied.The research results showed that,(1) The size of nano TiO_(2) was an important factor affecting the mechanical properties of adhesive,and it was more suitable to use TiO_(2) with a particle size of 30 nm for filling.(2) The addition amount of nano TiO_(2) was another important factor affecting the mechanical properties of adhesive.When the addition amount of TiO_(2) was 5.0%,the mechanical properties of the adhesive were significantly improved.(3) The size and addition amount of nano TiO_(2) were important factors affecting its antibacterial performance.When the particle size of nano TiO_(2) in the adhesive was30 nm and the addition mass fraction was 5.0%,the antibacterial rate reached 97.46%,meeting the requirements of industry's antibacterial rate standard.