Complicity of degradable polymers in health-care applications

Anju, S.; Prajitha, N.; Sukanya, V S; Mohanan, P.V.

doi:10.1016/j.mtchem.2019.100236

Cited by 53 publications

(42 citation statements)

References 155 publications

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“…In general, the main methods for plastic waste reduction/elimination are thermal and chemical degradation, photodegradation, oxidative degradation, and biodegradation (Haider et al, 2019;Anju et al, 2020). Mechanical recycling and energy recycling (recovery) are often employed.…”

Section: Chemical Methods For Plastic Recycling Valorizationmentioning

confidence: 99%

“…Commercial polymers such as PE and PP are susceptible to photo-and thermo-oxidation and undergo chain scission with reduction in their molar mass (Anju et al, 2020). Thus, the main used methods for the degradation of PE are the oxidative methods.…”

Section: Polyethylene (Pe) Degradationmentioning

confidence: 99%

“…Photo-oxidation, similarly to thermo-oxidation, involves a chain of reactions and is generally divided into three steps: initiation, propagation, and termination ( Figure 10A; Singh and Sharma, 2008). In the initiation step, chemical bonds in the main polymer chain are broken, and oxygen-mediated disintegration of polymers liberates free radicals (Gewert et al, 2015;Anju et al, 2020). In the propagation phase, the polymer radical reacts with oxygen and forms a peroxy radical and this leads to the scission of long polymer chains into shorter chains (Singh and Sharma, 2008;Gewert et al, 2015).…”

Section: Polyethylene (Pe) Degradationmentioning

confidence: 99%

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Marine Environmental Plastic Pollution: Mitigation by Microorganism Degradation and Recycling Valorization

et al. 2020

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Plastics are very useful materials and present numerous advantages in the daily life of individuals and society. However, plastics are accumulating in the environment and due to their low biodegradability rate, this problem will persist for centuries. Until recently, oceans were treated as places to dispose of litter, thus the persistent substances are causing serious pollution issues. Plastic and microplastic waste has a negative environmental, social, and economic impact, e.g., causing injury/death to marine organisms and entering the food chain, which leads to health problems. The development of solutions and methods to mitigate marine (micro)plastic pollution is in high demand. There is a knowledge gap in this field, reason why research on this thematic is increasing. Recent studies reported the biodegradation of some types of polymers using different bacteria, biofilm forming bacteria, bacterial consortia, and fungi. Biodegradation is influenced by several factors, from the type of microorganism to the type of polymers, their physicochemical properties, and the environment conditions (e.g., temperature, pH, UV radiation). Currently, green environmentally friendly alternatives to plastic made from renewable feedstocks are starting to enter the market. This review covers the period from 1964 to April 2020 and comprehensively gathers investigation on marine plastic and microplastic pollution, negative consequences of plastic use, and bioplastic production. It lists the most useful methods for plastic degradation and recycling valorization, including degradation mediated by microorganisms (biodegradation) and the methods used to detect and analyze the biodegradation.

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Section: Chemical Methods For Plastic Recycling Valorizationmentioning

confidence: 99%

Section: Polyethylene (Pe) Degradationmentioning

confidence: 99%

Section: Polyethylene (Pe) Degradationmentioning

confidence: 99%

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Marine Environmental Plastic Pollution: Mitigation by Microorganism Degradation and Recycling Valorization

et al. 2020

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“…The destruction process represents the decomposition of polymer chains with separation of low molecular weight compounds other than the monomer [ 22 ]. The degradation process is the partial decomposition of the polymer, not into low molecular weight products, but into fragments with large but smaller molecular weights than the original polymer, and this is the most common process during the lifetime of a polymeric material [ 23 , 24 , 25 , 26 ].…”

Section: Degradation Of Polymersmentioning

confidence: 99%

“…There are different types of polymer degradation such as thermal, photo, hydrolitic, bio and mechanical degradation [ 24 ]. Polymeric materials are susceptible to degradation to varying degrees.…”

Section: Degradation Of Polymersmentioning

confidence: 99%

Lifetime Prediction Methods for Degradable Polymeric Materials—A Short Review

2020

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The determination of the secure working life of polymeric materials is essential for their successful application in the packaging, medicine, engineering and consumer goods industries. An understanding of the chemical and physical changes in the structure of different polymers when exposed to long-term external factors (e.g., heat, ozone, oxygen, UV radiation, light radiation, chemical substances, water vapour) has provided a model for examining their ultimate lifetime by not only stabilization of the polymer, but also accelerating the degradation reactions. This paper presents an overview of the latest accounts on the impact of the most common environmental factors on the degradation processes of polymeric materials, and some examples of shelf life of rubber products are given. Additionally, the methods of lifetime prediction of degradable polymers using accelerated ageing tests and methods for extrapolation of data from induced thermal degradation are described: the Arrhenius model, time–temperature superposition (TTSP), the Williams–Landel–Ferry (WLF) model and 5 isoconversional approaches: Friedman’s, Ozawa–Flynn–Wall (OFW), the OFW method corrected by N. Sbirrazzuoli et al., the Kissinger–Akahira–Sunose (KAS) algorithm, and the advanced isoconversional method by S. Vyazovkin. Examples of applications in recent years are given.

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Emerging polymeric biomaterials and manufacturing techniques in regenerative medicine

et al. 2022

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The current demand for patients’ organ and tissue repair and regeneration is continually increasing, where autologous or allograft is the golden standard treatment in the clinic. However, due to the shortage of donors, mismatched size and modality, functional loss of the donor region, possible immune rejection, and so forth, the application of auto‐/allo‐grafts is frequently hindered in many cases. In order to solve these problems, artificial constructs structurally and functionally imitating the extracellular matrix have been developed as substitutes to promoting cell attachment, proliferation, and differentiation, and ultimately forming functional tissues or organs for better tissue regeneration. Particularly, polymeric materials have been widely utilized in regenerative medicine because of their ease of manufacturing, flexibility, biocompatibility, as well as good mechanical, chemical, and thermal properties. This review presents a comprehensive overview of a variety of polymeric materials, their fabrication methods as well applications in regenerative medicine. Finally, we discussed the future challenges and perspectives in the development and clinical transformation of polymeric biomaterials.

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Complicity of degradable polymers in health-care applications

Cited by 53 publications

References 155 publications

Marine Environmental Plastic Pollution: Mitigation by Microorganism Degradation and Recycling Valorization

Marine Environmental Plastic Pollution: Mitigation by Microorganism Degradation and Recycling Valorization

Lifetime Prediction Methods for Degradable Polymeric Materials—A Short Review

Emerging polymeric biomaterials and manufacturing techniques in regenerative medicine

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