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首页> 外文期刊>Journal of Applied Polymer Science >Surface modification of polymethyl methacrylate intraocular lenses with the mixture of acrylic acid and acrylamide via plasma-induced graft copolymerization
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Surface modification of polymethyl methacrylate intraocular lenses with the mixture of acrylic acid and acrylamide via plasma-induced graft copolymerization

机译：通过等离子体诱导的接枝共聚用丙烯酸和丙烯酰胺的混合物对聚甲基丙烯酸甲酯人工晶状体进行表面改性

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摘要

An approach is presented for the graft copolymerization of acrylic acid (AAc) and acrylamide (AAm) mixture onto the surfaces of polymethyl methacrylate intraocular lenses (PMMA IOLs) treated with an Argon gas plasma followed by the exposure to the oxygen atmosphere. In this case, peroxides formed by the plasma treatment are likely to be responsible for initiating the graft copolymerization. The amount of peroxides on the surface of PMMA IOLs was determined using 1,1-diphenyl-2-picrylhydrazyl, and the maximum amount was found with the plasma treatment at 30 W for 20 s under 5 mTorr pressure. The surfaces of the grafted PMMA IOLs were characterized using Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), electron spectroscopy for chemical analysis, and contact angle meter. The FTIR-ATR spectrum of PMMA-g-AAc-AAm showed the characteristic band of PAAc at 1580 cm(-1) together with those of PAAm at 1670 and 1630 cm(-1), confirming that the copolymer of AAc and AAm was successfully grafted onto the surfaces of PMMA IOLs. The experimental data of O1s/C1s and N1s/C1s reasonably concurred with the calculated data, a strong indication that the pH value of the reaction medium at 3.77 could produce a graft with an equal molar ratio. Surface tension of the samples increased to 52 dyn/cm due to the graft of the hydrophilic monomers. (C) 2002 Wiley Periodicals, Inc. [References: 14]
机译：提出了一种方法，用于将丙烯酸（AAc）和丙烯酰胺（AAm）混合物接枝共聚到用氩气等离子体处理过的聚甲基丙烯酸甲酯人工晶状体（PMMA IOL）的表面上，然后暴露于氧气气氛中。在这种情况下，通过等离子体处理形成的过氧化物可能是引发接枝共聚的原因。使用1，1-二苯基-2-吡啶甲基肼确定PMMA IOL表面的过氧化物含量，并在5 mTorr压力下于30 W进行20 s的等离子体处理，发现最大量。使用傅里叶变换红外光谱-全反射率（FTIR-ATR），用于化学分析的电子光谱和接触角仪对接枝的PMMA IOL的表面进行了表征。 PMMA-g-AAc-AAm的FTIR-ATR光谱显示了1580 cm（-1）时PAAc的特征谱带以及1670和1630 cm（-1）时PAAm的特征谱带，证实了AAc和AAm的共聚物是成功地接枝到了PMMA IOL的表面上。 O1s / C1s和N1s / C1s的实验数据与计算值合理地吻合，强烈表明反应介质的pH值为3.77可以产生等摩尔比的接枝物。由于亲水性单体的接枝，样品的表面张力增加到52 dyn / cm。 （C）2002 Wiley Periodicals，Inc. [参考：14]

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