Developments in the field of rosin chemistry and its implications in coatings

Chen, Gang-Fung

doi:10.1016/0033-0655(92)80002-e

Cited by 50 publications

(19 citation statements)

References 64 publications

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“…The most frequent and abundant diterpenoid resin compounds found in rosin are derivatives of abietane (abietic, neoabietic, dehydroabietic acidaromatic, palustric, and levopimaric acids), pimarane, and isopimarane (pimaric, isopimaric, and sandaracopimaric acids) skeletons (Table S3) (Keeling and Bohlmann 2006;Silvestre and Gandini 2008). In general, from rosin feedstock, several products can be obtained, such as adhesives, coatings, printing inks, paper-sizing, waterproofing material, polymerization emulsifiers, surfactants, polymer precursors, and emulsifiers for pharmaceutical and cosmetic applications (Chen 1992;Lee et al 2001;Mandaogade et al 2002;Silvestre and Gandini 2008;Rao 2012).…”

Section: Oleoresin Products and Marketmentioning

confidence: 99%

Pine oleoresin: tapping green chemicals, biofuels, food protection, and carbon sequestration from multipurpose trees

Rodrigues-Corrêa

Lima

Fett-Neto

2012

Food and Energy Security

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Plants of the genus Pinus are able to grow in a wide range of environments, many of which are quite harsh and extreme. High benefit–cost ratio of pine plantations resides on the relatively low demand for management investments and high economic and environmental services returns. Pine forests work as sinks of atmospheric carbon, contributing to greenhouse effect mitigation. They are important sources of numerous useful products, including not only wood and cellulose but also nonwood products used by the chemical, food, and pharmaceutical industries, as well as for biorefineries. This review examines biological and economic aspects of pine trees concerning the chemical industry, especially the contributions of this natural source for replacing petroleum‐derived chemicals and fuels, improving food safety, and increasing carbon storage. Future goals for this forestry sector, such as the establishment of super‐resinous forests, are also discussed.

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Section: Oleoresin Products and Marketmentioning

confidence: 99%

Pine oleoresin: tapping green chemicals, biofuels, food protection, and carbon sequestration from multipurpose trees

Rodrigues-Corrêa

Lima

Fett-Neto

2012

Food and Energy Security

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“…These can be divided into two subgroups, namely pimaric and abietic type acids [13]. The basic difference between the two groups is in the substituent at the C-13 position, which is isopropyl in abietic acid and vinyl or methyl in pimaric acid [11,13]. The varnishes used by Stradivari have the ratio of 3:1 flax and colophony oil, with some dyes [6].…”

Section: Determination Of the Archaeometric Characteristics Of The Vamentioning

confidence: 99%

“…Moreover, most of the violins that have survived to the present day have undergone restoration and revarnishing interventions of various magnitudes. Negligent or very intense/aggressive use of the violin leads to pre-collapse situations: longitudinal fractures at the level of the f-holes/worktop areas, or upper cover lid detachment, tab damage, cracking or erosion of the varnish in active areas (next to the chin or near the tongue and the throat), and other deterioration or evolving degradations requiring urgent restoration and reversal interventions [1,2,[10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Authentication of an Old Violin by Multianalytical Methods

et al. 2019

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The paper presents the authentication of a Stradivari 1737 type violin, which belonged to the Romanian scientist Ştefan Odobleja. The analytical methods used in the study for assessing archaeometric characteristics of some component materials, along with the white degree and glycolysis rate measurements of the label that allowed an extensive evaluation of the violin, were OM, SEM–EDX, and micro-FTIR. The preparation binder (egg white from thin gypsum layers) and the varnish (identification of linseed oil and colophony components, alongside contamination impurities) were assessed in order to evaluate the artefact conservation state, as well as the restoration and counterfeiting interventions. We can conclude that the violin was done by a violin maker from the Stradivari family, and it is a replica of the violins of that period.

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“…The use of biomass for this need has been surprising in environmental fields, due to social and economic sustainability (TREVISANI et al, 2006). In the past, biomass was widely used as a source of fibers, polymers and fuels, by virtue of its renewable capacity and availability (Chen, 1992). Vegetable oils were used as energy sources even before fossil diesel, but at that time petroleum was a novelty, and due to large demand, its products had low prices, making their use more viable.…”

Section: Introductionmentioning

confidence: 99%

Tephrosia Vogelii oil use in biodiesel production and its conservation with Syzygium jambolanum DC (jambul) extract

2018

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ResumoTephrosia (Tephrosia Vogelii) é uma leguminosa que tem cerca de 8% de óleo e rotenoides, que tem sido estudado por vários autores. Este óleo foi extraído das sementes e utilizado para transesterificação formando, glicerina e biodiesel como principais produtos, que são uma mistura de ésteres alquílicos de cadeia linear. Na transesterificação, foi utilizado um excesso de álcool em proporções molares de 6: 1 para o metanol e de 9: 1 a 12: 1 para o etanol e subsequente remoção da glicerina. O jamelão (Syzygium jambolanum), é um fruto da família myrtaceae, amplamente utilizado como ornamental e seus frutos são comestíveis, eles foram empregados na forma de extrato como antioxidante. O biodiesel obtido foi submetido ao teste Rancimat, método padrão aprovado pela norma europeia EN 14214 e pela norma brasileira RANP 07/08, com o objetivo de analisar a estabilidade oxidativa do biodiesel, onde o valor mínimo permitido de indução é de 6 horas. A composição de ácidos graxos foi feita por cromatografia gasosa, gentilmente efetuada pela Universidade Estadual de Maringá (UEM). O extrato de jamelão mostrou atividade antioxidante por eliminação de radicais livres do DPPH e o valor de 44,15%, em relação ao Trolox. A concentração fenólicos totais em soluções diluídas até dez vezes, foi de 4,45 mg ml-1. O teste Rancimat mostrou um período de indução de 3,59 horas sem a presença de antioxidante, indicando que a presença desse antioxidante era necessária. Quando o teste de Rancimat foi realizado na presença de extrato de jamelão, observou-se um tempo de indução de 8,2 horas, sugerindo a eficiência do antioxidante aplicado e mostrando grande similaridade com os valores obtidos de um biodiesel sintetizado a partir de óleo de soja. Biodiesel de óleo de soja sem hidroxitolueno butilado (BHT) mostrou um tempo de indução de 4,2 horas, enquanto que na presença de extrato de jamelão o tempo de indução obtido foi de 7,1 horas. Novas alternativas ao óleo de soja para a produção de biodiesel são cada vez mais exigidas, e o óleo de sementes de Tephrosia (Tephrosia vogelii) pode ser usado para este fim. O antioxidante provou ser de grande viabilidade e aplicabilidade para conservação, e não requer grandes quantidades para obter um resultado satisfatório e consistente conforme requerido pela legislação, uma vez que sua obtenção é derivada de fontes naturais. Palavras-chave: Biodiesel. Jamelão. Transesterificação. AbstractTephrosia (Tephrosia Vogelii) is a legume that has about 8% oil plus rotenoids, which has been studied by several authors. This oil was analyzed in the seeds and used for transesterification of triglycerides providing glycerin and biodiesel as major products, which are a mixture of straight-chain alkyl esters. In transesterification, an excess of alcohol is used in molar ratios of 6: 1 for methanol and 9: 1 to 12: 1 for ethanol, and subsequent removal of glycerin. Jambul (Syzygium jambolanum), a fruit from the myrtaceae family that is widely grown due its use in ornaments and for their edible fruits, was employed as an anti...

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Developments in the field of rosin chemistry and its implications in coatings

Cited by 50 publications

References 64 publications

Pine oleoresin: tapping green chemicals, biofuels, food protection, and carbon sequestration from multipurpose trees

Pine oleoresin: tapping green chemicals, biofuels, food protection, and carbon sequestration from multipurpose trees

Authentication of an Old Violin by Multianalytical Methods

Tephrosia Vogelii oil use in biodiesel production and its conservation with Syzygium jambolanum DC (jambul) extract

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