نتایج جستجو برای: biodegradable polymers

تعداد نتایج: 81074  

Journal: :Chemical communications 2012
Aneta J Mieszawska Anita Gianella David P Cormode Yiming Zhao Andries Meijerink Robert Langer Omid C Farokhzad Zahi A Fayad Willem J M Mulder

Polylactic-co-glycolic acid (PLGA) based nanoparticles are biocompatible and biodegradable and therefore have been extensively investigated as therapeutic carriers. Here, we engineered diagnostically active PLGA nanoparticles that incorporate high payloads of nanocrystals into their core for tunable bioimaging features. We accomplished this through esterification reactions of PLGA to generate p...

2017
Mythili Prakasam Janis Locs Kristine Salma-Ancane Dagnija Loca Alain Largeteau Liga Berzina-Cimdina

Recent progress made in biomaterials and their clinical applications is well known. In the last five decades, great advances have been made in the field of biomaterials, including ceramics, glasses, polymers, composites, glass-ceramics and metal alloys. A variety of bioimplants are currently used in either one of the aforesaid forms. Some of these materials are designed to degrade or to be reso...

2016
Zhijian Tan Yongjian Yi Hongying Wang

The use of plastic film in agriculture has the serious drawback of producing vast quantities of waste. In this work, films were prepared from natural fibers and biodegradable polymers as potential substitutes for the conventional non-biodegradable plastic film used as mulching material in agricultural production. The physical properties (e.g., mechanical properties, heat preservation, water per...

Journal: :Biomaterials 2005
Carlos A Aguilar Yi Lu Samuel Mao Shaochen Chen

Thin films of biodegradable polymeric materials, poly(epsilon-caprolactone) (PCL) and poly(glycolic acid) (PGA) were micro-patterned using a Ti-sapphire femtosecond pulsed laser and ArF excimer UV laser in ambient conditions. The laser-patterned polymers were characterized using a scanning electron microscope (SEM), Fourier transform infrared spectroscopy in attenuated total reflectance mode (F...

2017
Ali Hossein Rezayan Negar Firoozi Somayyeh Kheirjou Seyed Jamal Tabatabaei Rezaei Mohammad Reza Nabid

In this paper, the focus is on a new kind of biodegradable semi-interpenetrating polymer networks, which is derived from ɛ-caprolactone, lactide, 1,4-butane diisocyanate and ethylenediamine and also its potential has been investigated in soft tissue engineering applications. The polymers were characterized by nuclear magnetic resonance (NMR) spectrometry, Fourier transform infrared spectroscopy...

2010
Zengshe Liu Sevim Z. Erhan

Ring-opening polymerization of epoxidized soybean oil (ESO) catalyzed by boron trifluoride diethyl etherate (BF3 OEt2) in methylene chloride was conducted in an effort to develop useful biodegradable polymers. The resulting polymerized ESO (PESO) were characterized using infrared (IR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), H NMR, C NMR, solid st...

2017
M. Susana Cortizo M. Soledad Belluzo

The destruction of bone tissue due to disease (osteonecrosis, tumors, osteoporosis) or inefficient healing posttraumatic injury is a problem affecting the world population. The repair of small defect may be mediated by the osteoblast and osteoclast activity which ensures a balanced control of bone resorption and formation, allowing the bone repair, renewal, and growth. However, when the defect ...

2010
Maria Teresa Barros Krasimira T. Petrova Raj P. Singh

Herein, we report the synthesis of monomethacryloyl sucrose esters, and their successful free radical homo- and co-polymerisation with styrene, methylmethacrylate, α-and β-pinene. The chemical, physical, structural and surface chemical properties of these polymers, containing a hydrophobic olefin backbone and hydrophilic sugar moieties as side chains, have been investigated. Biodegradation test...

2016
Luís J. del Valle Lourdes Franco Ramaz Katsarava Jordi Puiggalí

Development of materials with an antimicrobial activity is fundamental for different sectors, including medicine and health care, water and air treatment, and food packaging. Electrospinning is a versatile and economic technique that allows the incorporation of different natural, industrial, and clinical agents into a wide variety of polymers and blends in the form of micro/nanofibers. Furtherm...

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