Antibacterial effect of thiocyanate substituted poly(vinyl chloride)

Kameda, Tomohito; Ono, Masahiko; Grause, Guido; Mizoguchi, Tadaaki; Yoshioka, Toshiaki

doi:10.1007/s10965-010-9492-3

Cited by 42 publications

(20 citation statements)

References 11 publications

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“…For example, only 3.8 % of the Cl present in PVC was substituted with isothiocyanate ( _ N C S) at 100 in tetra hydrofuran (THF)/dimethyl sulfoxide (DMSO) solution, which showed reduced adhesion of bacteria (Staphylococcus capitis) by 79 % (Fig. 6) 78 ) . This finding may be very important in the use of PVC in sanitary goods, wallpaper, and so on.…”

Section: Pvcmentioning

confidence: 99%

Feedstock Recycling <i>via</i> Waste Plastic Pyrolysis

Kumagai

2016

J. Jpn. Petrol. Inst.

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Plastics are essential materials for various products such as packaging and containers, electrical and electronic equipment, and automobiles. Japanese production of polymers was reported as 10.6 million t in 2014 1) , with the majority prepared from finite fossil resources. Currently, in excess of 150 and 200 different types of polymers and additives, respectively, are produced and distributed within Japan 2 ) . Metals and fillers are further mixed with these products to achieve the desired properties, giving innumerable combinations. Thus, no single recycling technique can treat all types of waste plastics. Consequently, waste plastics are commonly treated by mechanical recycling, feedstock recycling, and energy recovery, depending on the waste composition and the purpose of the recycled products.The Plastic Waste Management Institute reported that 9.3 million t of waste plastics were collected in 2014 in Japan 1 ) . The utilized rate (mechanical recycling feedstock recycling energy recovery) for collected waste plastics was 83 %, and is increasing yearly. Utilization can be broken down into 70 % energy recovery, 26 % mechanical recycling, and 4 % feedstock recycling. According to the Basic Law for Establishing the Recycling-based Society, the order of priority of these techniques is as follows: mechanical recycling feedstock recycling energy recovery. Therefore, the ideal and actual situations show a wide gap.Feedstock recycling is a growing field in Japan, but is challenging due to the mismatch with current domestic recycling systems. However, advances in research and technical development show the potential to achieve an advanced recycling-based society. In Japan, monomerization, blast furnace reduction, coke oven chemical feedstock recycling, liquefaction, and gasification are categorized as feedstock recycling. In this paper, we focus on liquefaction and gasification, which are based on the pyrolysis technique.Pyrolysis converts polymeric materials into gases, liquids, and solids at high temperatures in the absence of oxygen. This process cleaves various chemical bonds in polymers and additives by the action of only heat, which is advantageous for low-purity waste that cannot be treated by mechanical recycling. Polyethylene (PE), polypropylene (PP), and polystyrene (PS) are the main polymeric materials produced worldwide, so have been widely studied. In addition, these materials are good quality carbon and hydrogen resources (PE and PP: 86 % C and 14 % H; PS: 92 % C and 8 % H). In contrast, the pyrolysis of polyvinyl chloride (PVC) and poly(ethylene terephthalate) (PET) Recycling of waste plastics is essential for reducing environmental degradation and ensuring future resource security. The quantity of domestic plastic waste recycled is increasing yearly, reaching 83 % in 2014. However, only 26 % and 4 % of the recycled waste plastic is treated by mechanical and feedstock recycling, respectively, whereas 70 % is treated by energy recovery (incineration). Therefore, the mechanical and feedstock recycling ra...

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Section: Pvcmentioning

confidence: 99%

Feedstock Recycling <i>via</i> Waste Plastic Pyrolysis

Kumagai

2016

J. Jpn. Petrol. Inst.

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“…When PVC is exposed to a nucleophile such as a thiol group, a substitution reactions occur ( Step 1 in Figure 1). 37…”

Section: Solvent -Non Solvent Mptms Modificationmentioning

confidence: 99%

Dual antibacterial effect of immobilized quaternary ammonium and aliphatic groups on PVC

et al. 2015

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“…Among these studies, the thiocyanated PVC that was exposed to some types of Gram(‐ve) bacteria. The results indicated that the modified PVC reduced the adhesion of bacteria by between 67 and 79% .…”

Section: Introductionmentioning

confidence: 98%

Effect of some biologically active pyridopyrimidine derivatives on photostability and bioactivity of rigid poly(vinyl chloride)

Rabie

Monem

2016

Vinyl Additive Technology

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Some pyridopyrimidine derivatives with high biological activity have been investigated as photostabilizers for rigid Poly(vinyl chloride) (PVC). Their stabilizing efficiencies were evaluated by determining the percentage of weight loss, the amount of formed gel, as well as the intrinsic viscosities, of the photodegraded PVC. The extent of discoloration of the photodegraded polymer was also evaluated. The antimicrobial activities of PVC was evaluated in absence and in presence of the investigated materials. The applied materials reduced the loss in weight that resulted from HCl evolution during photodegradation. Both viscosity and gel content measurements showed also a decrease in their values during the degradation process. The extent of discoloration was also improved. The results have proved a greater stabilizing efficiencies of the antimicrobial pyridopyrimidine derivatives than that of the industrial UV absorber, phenyl salicylate. Photostabilized samples of PVC exhibited good antimicrobial activities against some types of bacteria and fungi. A radical mechanism was proposed to account for the stabilizing action of the investigated products. J. VINYL ADDIT. TECHNOL.,

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Antibacterial effect of thiocyanate substituted poly(vinyl chloride)

Cited by 42 publications

References 11 publications

Feedstock Recycling <i>via</i> Waste Plastic Pyrolysis

Feedstock Recycling <i>via</i> Waste Plastic Pyrolysis

Dual antibacterial effect of immobilized quaternary ammonium and aliphatic groups on PVC

Effect of some biologically active pyridopyrimidine derivatives on photostability and bioactivity of rigid poly(vinyl chloride)

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