LASER SURFACE TREATMENT OF A BIODEGRADABLE POLYMER AT VARYING FLUENCES

机译：可变通量的可生物降解聚合物的激光表面处理

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For biodegradable polymers such as poly (L-lactic acid) (PLLA), material crystallinity has a considerable effect on degradation and physical properties. In this work, the effects of laser fluence of a 355 nm UV Q-switched Nd-YAG laser on the crystallinity and conformation at the surface of PLLA films and the factors affecting the transformation are investigated. Electron microscopy, X-ray diffraction, and infrared spectroscopy are used to study the effects at varying fluences. The melting and crystallization kinetics of PLLA are examined to understand the important parameters that determine the overall crystallinity. Potentially, laser surface treatment at varying fluences can be used to spatially control the generation of a polymer surface with an altered degree of crystallinity. Such a structure may have applications including time-released drug delivery.

机译：对于可生物降解的聚合物，例如聚（L-乳酸）（PLLA），材料的结晶度对降解和物理性能有很大影响。在这项工作中，研究了355 nm UV Q开关Nd-YAG激光的能量密度对PLLA膜表面的结晶度和构象的影响以及影响转变的因素。电子显微镜，X射线衍射和红外光谱用于研究不同注量下的影响。检查了PLLA的熔融和结晶动力学，以了解决定总体结晶度的重要参数。潜在地，可以使用具有不同注量的激光表面处理来在空间上控制具有改变的结晶度的聚合物表面的产生。这样的结构可以具有包括延时释放的药物递送的应用。

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来源
《Transactions of the North American Manufacturing Research Institution of SME》|2008年|25-32|共8页
会议地点 Monterrey(MX);Monterrey(MX)
作者
Anubha Bhatla; Y. Lawrence Yao;
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作者单位

Department of Mechanical Engineering Columbia University New York, New York;

Department of Mechanical Engineering Columbia University New York, New York;

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会议组织
原文格式 PDF
正文语种 eng
中图分类
关键词
laser; biodegradable; polymer; surface treatment;

机译：激光;可生物降解聚合物;表面处理;

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1. Femtosecond Laser Fabrication of Engineered Functional Surfaces Based on Biodegradable Polymer and Biopolymer/Ceramic Composite Thin Films [J] . Albena Daskalova, Irina Bliznakova, Liliya Angelova, Polymers . 2019,第2期

机译：飞秒激光加工基于可生物降解聚合物和生物聚合物/陶瓷复合薄膜的工程功能表面
2. Comprehensive study of polymer fiber surface modifications Part 1: high-fluence UV-excimer-laser-induced structures [J] . Joanne Yip, Kwong Chan, Kwan Moon Sin, Polymer international . 2004,第6期

机译：聚合物纤维表面改性的综合研究第1部分：高通量紫外线准分子激光诱导的结构
3. Retrospective analysis of melasma treatment using a dual mode of low-fluence Q-switched and long-pulse Nd:YAG laser vs. low-fluence Q-switched Nd: YAG laser monotherapy (vol 17, pg 2, 2015) [J] . Choi Chun Pil, Yim Seon Mi, Seo Soo Hong, Journal of cosmetic and laser therapy . 2015,第4期

机译：回顾性分析使用低通量Q开关和长脉冲Nd：YAG激光与低通量Q开关Nd：YAG激光单一疗法的双模式黄褐斑治疗（2015年第17卷，第2，页）
4. Laser Surface Treatment of a Biodegradable Polymer at Varying Fluences [C] . A. BHATLA, Y. L. YAO SME Technical Conference . 2008

机译：激光表面处理可生物降解聚合物的不同流量
5. Improvements in the mechanical properties of some biodegradable polymers & bimodal poly(dimethylsiloxane) hydrogels and surface hydrophilic treatments. [D] . Zhang, Xiujuan. 2009

机译：改善了一些可生物降解的聚合物和双峰聚二甲基硅氧烷水凝胶的机械性能以及表面亲水性处理。
6. Femtosecond Laser Fabrication of Engineered Functional Surfaces Based on Biodegradable Polymer and Biopolymer/Ceramic Composite Thin Films [O] . Albena Daskalova, Irina Bliznakova, Liliya Angelova, 2018

机译：飞秒激光加工基于可生物降解聚合物和生物聚合物/陶瓷复合薄膜的工程功能表面
7. Danger of Low Fluence Q-switched Nd:YAG Laser Treatment for Melasma--So-called“Laser Toning” CASE REPORT Danger of Low Fluence Q-switched Nd:YAG Laser Treatment for Melasma--So-called“Laser Toning” [O] . Kenichiro Kasai 2016

机译：低流量的危险Q-Switched ND：对褐发质的Masma激光处理 - 所谓的“激光调光”病例报告低流量Q-Switched Nd：YAG激光治疗对黑阵的“激光调光”

LASER SURFACE TREATMENT OF A BIODEGRADABLE POLYMER AT VARYING FLUENCES

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