紫外固化聚丙烯酸酯医用导电胶的制备和性能研究  

Preparation and properties of UV-curable polyacrylate medical conductive adhesive

作　　者：范延超 宫静榕 朱冬玲 栾伟伟 Fan Yanchao;Gong Jingrong;Zhu Dongling;Luan Weiwei(Hebei Kangchen Biotechnology Co.,Ltd.,Handan 056200,Hebei,China)

机构地区：[1]河北康臣生物科技有限公司,河北邯郸056200

出　　处：《中国胶粘剂》2025年第4期53-59,70,共8页China Adhesives

摘　　要：以水溶性单体2-丙烯酰胺基-2-甲基丙磺酸(AMPS)作为聚合主体,以1,2-丙二醇作为增溶剂、N,N-亚甲基双丙烯酰胺作为交联剂、碳酸钾作为中和剂、氯化钾作为电性能增强剂、导电钛白粉作为辅助导电剂、2-羟基-4’-(2-羟乙氧基)-2-甲基苯丙酮作为光引发剂制成的导电胶液,经过涂布及UV固化机固化,可直接制成医用导电胶,并对其结构和性能进行表征。研究结果表明:(1)傅里叶变换红外光谱仪和热裂解气相色谱质谱联用仪分析其结构后认为,已经成功制备了目标产物。(2)AMPS用量小时,水性聚丙烯酸酯导电胶的结构强度小,导致测试180°剥离力时胶层发生内部结构撕裂,180°剥离力小;而当AMPS用量过大时,胶粘剂的结构太强,压敏胶不容易贴敷到钢板上,也导致180°剥离力小。选择AMPS质量分数为40%时,胶粘剂的性能相对较好。(3)增塑剂1,2-丙二醇在低用量时,可以给胶层提供弹性形变,使胶层与基材的表面更充分接触,剥离力随1,2-丙二醇用量增加而升高;但当1,2-丙二醇用量过高时,界面处易发生内聚破坏(胶层内部断裂),导致剥离力下降。选择1,2-丙二醇的配比为21.2%,作为最终配方。(4)在交联剂N,N-亚甲基双丙烯酰胺低用量时,可增强胶层内聚力,且随着用量增大而剥离力增大;但用量过大时交联网络过于致密,分子链运动受阻,致使剥离力降低,剥离面易发生突发性界面分离。选择交联剂质量分数为0.13%,作为最终工艺配方。(5)在筛选的相对最优条件下,采用2-羟基-4’-(2-羟乙氧基)-2-甲基苯丙酮作为胶液的引发剂、氯化钾作为导电剂、纳米级高纯导电钛白粉作为辅助导电剂,可以使最终制成的医用导电胶具有优良的心电性能。(6)经过55℃恒温30天,或者-20℃冷冻7天处理后,上述配方导电胶制成的心电电极的心电性能、黏附力基本保持不变,表明该导电胶具有较好的耐候性。Using water-soluble monomer 2-acrylamido-2-methylpropanesulfonic acid(AMPS)as the main polymer,1,2-propanediol as the solubilizer,N,N-methylbisacrylamide as the crosslinking agent,potassium carbonate as the neutralizing agent,potassium chloride as the electrical performance enhancer,conductive titanium dioxide as the auxiliary conductive agent,and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylphenylacetone as the photoinitiator,the conductive adhesive solution was prepared.After coating and UV curing,it could be directly made into medical conductive adhesive,and its structure and properties were characterized.The research results showed that,(1)After analyzing its structure using Fourier transform infrared spectroscopy and pyrolysis gas chromatography-mass spectrometry,it was believed that the target product had been successfully prepared.(2)When the dosage of AMPS was small,the structural strength of water-based polyacrylate conductive adhesive was low,which led to internal structural tearing of the adhesive layer when testing 180°peel force,resulting in low 180°peel force.When the amount of AMPS used was too large,the structure of the adhesive was too strong,and the pressure sensitive adhesive was not easy to adhere to the steel plate,which also led to low 180°peel force.When selecting AMPS mass fraction of 40%,the performance of the adhesive was relatively good.(3)When the dosage of plasticizer 1,2-propylene glycol was low,it could provide elastic deformation to the adhesive layer,making the surface of the adhesive layer more fully in contact with the substrate,and the peel force increased with the increase of 1,2-propylene glycol dosage.But when the dosage of 1,2-propylene glycol was too high,cohesive failure(internal fracture of the adhesive layer)was prone to occur at the interface,resulting in a decrease in peel force.The ratio of 21.2%for 1,2-propylene glycol was selected as the final formula.(4)At low dosage of crosslinking agent N,N-methylene bisacrylamide,the cohesion of the adhesive layer could be enhance

关 键 词：聚丙烯酸酯 导电胶 紫外固化 医用 

分 类 号：TQ436.9[化学工程]