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Waste Tire Rubber-based Refrigerants for Solid-state Cooling Devices

Chinese Journal of Polymer Science 2020年第7期38卷 769-775,I0007页

作者： nicolau molina born Erik Oda Usuda Mariana da Silva Gigliotti Denílson JoséMarcolino de Aguiar William Imamura Lucas Soares Paixao Alexandre Magnus Gomes Carvalho Catalan Institute of Nanoscience and Nanotechnology(ICN2) 08860BellaterraBarcelonaSpain The Institute of Photonic Sciences(ICFO) 08193CastelldefelsBarcelonaSpain Universidade Federal de Sāo Paulo(UNIFESP) 00972-270DiademaSPBrazil Instituto de Física"Gleb Wataghin" Universidade Estadual de Campinas(UNICAMP)13083-970CampinasSPBrazil Universidade Tecnológica Federal do Paraná(UTFPR) 84017-220Ponta GrossaPRBrazil Faculdade de Engenharia Mec(a)nica Universidade Estadual de Campinas(UNICAMP)13083-860CampinasSPBrazil Departamento de Engenharia Mec(a)nica Universidade Estadual de Maringá(UEM)870-900MaringáPRBrazil

Management of discarded tires is a compelling environmental issue *** there are several approaches developed to recycle waste tire rubbers,their application in solid-state cooling is still *** the high barocaloric potential verified for elastomers,the use of waste tire rubber(WTR)as a refrigerant in solid-state cooling devices is very ***,we investigated the barocaloric effects in WTR and polymer blends made of vulcanized natural rubber(VNR)and WTR,to evaluate its feasibility for solid-state cooling *** adiabatic temperature changes and the isothermal entropy changes reach giant values,as well as the performance parameters,being comparable or even better than most barocaloric materials in ***,pure WTR and WTR-based samples also present a faster thermal exchange than VNR,consisting of an additional advantage of using these discarded ***,the present findings evidence the encouraging perspectives of employing waste rubbers in solid-state cooling based on barocaloric effects,contributing to both the recycling of polymers and the sustainable energy technology field.

关键词： Waste tire rubber Solid-state cooling Barocaloric effect Tire recycling Sustainable energy

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Supergiant Barocaloric Effects in Acetoxy Silicone Rubber over a Wide Temperature Range:Great Potential for Solid-state Cooling

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Chinese Journal of Polymer Science 2020年第9期38卷 999-1005,I0008页

作者： William Imamura Erik Oda Usuda Lucas Soares Paixao nicolau molina Bom Angelo Marcio Gomes Alexandre Magnus Gomes Carvalho Faculdade de Engenharia Mec(a)nica UNICAMPCEP 13083-860CampinasSPBrazil Universidade Federal de Sāo Paulo UNIFESPCEP 09913-030DiademaSPBrazil Instituto de Física Gleb Wataghin UNICAMPCEP 13083-859CampinasSPBrazil Catalan Institute of Nanoscience and Nanotechnology ICN208860 BelaterraBarcelonaSpain The Institute of Photonic Sciences ICFO08193 CastelldefelsBarcelonaSpain Instituto de Física UFRJCEP 21941-972Rio de JaneiroRJBrazil Departamento de Engenharia Mec(a)nica UEMCEP 87020-900MaringáPRBrazil

Solid-state cooling based on caloric effects is considered a viable alternative to replace the conventional vapor-compression refrigeration *** barocaloric materials,recent results show that elastomers are promising candidates for cooling applications around *** the present paper,we report supergiant barocaloric effects observed in acetoxy silicone rubber—a very popular,low-cost and environmentally friendly *** values of adiabatic temperature change and reversible isothermal entropy change were obtained upon moderate applied pressures and relatively low *** huge barocaloric changes are associated both to the polymer chain rearrangements induced by confined compression and to the first-order structural *** results are comparable to the best barocaloric materials reported so far,opening encouraging prospects for the application of elastomers in near future solid-state cooling devices.

关键词： Solid-state cooling Barocaloric effect Elastomer Silicone rubber Crystalline-amorphous transition

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Outcomes of surrogate pregnancies in California and hospital economics of surrogate maternity and newborn care

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World Journal of Obstetrics and Gynecology 2015年第4期4卷 102-107页

作者： Yona nicolau Austin Purkeypile T Allen Merritt Mitchell Goldstein Bryan Oshiro Department of Pediatrics Division of NeonatologyLoma Linda University Children’s Hospital Department of Obstetrics and Gynecology Loma Linda University Children’s Hospital Office of Finance Loma Linda University Children’s Hospital

AIM:To describe maternity and newborn charges for an economic analysis of surrogate pregnancies on the health care resource ***:A retrospective chart review of all women identified as being surrogates and the infants born from these pregnancies was performed between January 1,2012 and December 31,*** maternity diagnoses,mode of delivery,duration of hospitalization,and hospital charges were collected together with infants' birth weights,gestational age,length of hospital stay,and hospital *** associated with the in vitro fertilization cycles,artificial insemination,or embryo(s)transfer into the surrogate were not considered in the maternity charges.A ratio contrasting the maternity hospital charges for the surrogate carrier was compared as a ratio to the mean charges for 2540 infants delivered in 2013 after naturalconception and adjusted to the baseline hospital charges for both maternity and newborn ***:Analysis of sixty-nine infants delivered from both gestational and traditional surrogate women found an increased in multiple births,NICU admission,and length of stay with hospital charges several multiples beyond that of a term infant conceived naturally and provided care in our *** singletons and twins(per infant)hospital charges were increased 26 times(P < 0.001)and in triplets charges were increased 173 times(P < 0.0001)when compared to a term infant provided care in a normal nursery at our ***:Maternity costs for surrogates exceed those of women who conceive naturally,and these costs are especially magnified in women with triplets and multiple births.

关键词： Surrogacy pregnancy Assisted reproductive technologies Prematurity Multiple gestations

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