ИСО 21683-2019 "Release of nano-objects from paints, лакови и тонирана пластика експериментално симулирани за одређивање пигмената и пунила"

ИСО 21683-2019 “Ослобађање нано-објеката од боја, лакови и тонирана пластика експериментално симулирани за одређивање пигмената и пунила”

увод
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.

Процедуре које се користе за израду овог документа и оне које се користе за даље одржавање описане су у Делу 1 ИСО/ИЕЦ директиве. Нарочито, треба обратити пажњу на различите критеријуме одобрења који су потребни за различите типове ИСО докумената. This document has been drafted in accordance with the editing rules of ISO/IEC Directive Part 2 (види исо.орг/дирецтивес).

Please note that certain elements of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената. Details of any patent rights identified during the preparation of the document will be found in the introduction and/or in the list of patent claims received by ISO (see iso.org/patents).

ИСО 21683-2019 “Ослобађање нано-објеката од боја, лакови и тонирана пластика експериментално симулирани за одређивање пигмената и пунила”

Any trade names used in this document are provided for the convenience of the user and do not constitute an endorsement.

Voluntary, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (ТБТ) adhere to the principle of the world trade organization (WTO) information, please refer to the following URL:iso.org/iso/foreword.html.

This document was prepared by the ISO/TC 256 Technical Committee on Pigments, Dyes and Fillers.

Any feedback or questions regarding this document should be directed to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

увести
Nanoobjects (nanoscale pigments and fillers) can be released from paints, varnishes and tinted plastics into the surrounding air or liquids, which is an important health and safety consideration for the end user and the environment. Стога, it is important to obtain data on the tendency of tinted coatings and plastics to release nanoobjects, so that exposure [10] can be assessed, controlled, and minimized. This property may depend on the physical and chemical properties of the nanoobject and the substrate containing the nanoobject.

Methods currently available to assess the tendency of pigments, лакови, and plastics to release nano-objects into the air require energy to be applied to the sample to induce wear, ерозија, or comminentation, which causes the particles to diffuse into the gas phase, i.e., produce aerosols.

Due to their high sensitivity, particle number concentration and quantity weighted particle size distribution are necessary to quantify the release of nanoobjects, since particle mass depends on the cubic particle size and the mass concentration of nanoobjects is too low to detect them with currently commercially available instruments. Further measurements, such as total particle surface concentration, such as references [11] и [12], may help explain, на пример, health aspects. If the shape, morphology, porosity and density of the granular material is known, it can be precisely converted to different quantity types by measuring the total particle size distribution.

In addition to selecting the appropriate measuring instrument, quantitative assessment of process-induced particle release requires detailed information about the sample, the stress introduced, and the type of interconnect with the instrument. Figure 1 shows, на пример, the single stages that need to be considered when quantitatively characterizing particulate matter release in the air.

1 Домет
This document specifies a method for experimentally determining the release of nanoscale pigments and fillers into the environment under mechanical stress in paints, varnishes and tinted plastics.

The method is used to assess whether and how many particles of defined size and distribution are released from the surface and released into the environment under stress (the type and height of applied energy).

Samples are aged, weathered, or otherwise conditioned to simulate the entire life cycle.

2 Normative references
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. За датиране референце, примењује се само наведена верзија. For undated references, a new version of the reference (укључујући све ревизије) примењује.

ИСО 9276-1, Representation of results of particle size analysis – Парт 1: Graphical representation

ИСО/ТС 80004-1, nanotechnology – Vocabulary – Парт 1: Core terms

ИСО/ТС 80004-2, nanotechnology – Vocabulary – Парт 2: Nano-objects

3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TS 80004-1, ИСО/ТС 80004-2 and the following articles apply.

3.1 General terms and definitions

3.1.1 Aerosols

A system of solid or liquid particles suspended in a gas

[Извор: ИСО 15900:2009, 2.1]

3.1.2 nanometer scale

The length ranges from about 1 nm to 100 нм

Белешка 1: Properties that are not extrapolated from larger sizes are mainly represented in this length range.

[Извор: ИСО/ТС 80004-1:2015, 2.1]

3.1.3 Nanoparticles

For nanoobjects (3.1.4), all external dimensions are at the nanoscale (3.1.2), where the length of the longest and shortest axis of the nanoobject is not significantly different

Белешка 1: If the size difference is large (usually more than 3x), terms such as nanofibers or nanoplates may be superior to the term nanoparticles.

[Извор: ИСО/ТС 80004-2:2015, 4.4]

3.1.4 Nano objects

Discrete materials with one, two or three external dimensions at the nanoscale (3.1.2)

Белешка 1: The second and third external dimensions are orthogonal to the first dimension and to each other.

[Извор: ИСО/ТС 80004-1:2015, 2.5]

3.1.5 Паинт

A tinted coating material, when applied to a substrate, forms an opaque dry film with protective, decorative or specific technical properties

[Извор: ИСО 4618:2014, 2.184]

3.1.6 Equivalent spherical diameter x

The diameter of the sphere has the same physical properties as the particles being measured

Белешка 1: На пример, the physical properties are the same as the sedimentation rate or the displacement volume or projection area of the electrolyte solution under the microscope.

Белешка 2: The physical properties referred to by the equivalent diameter should be expressed using appropriate subscripts, such as x S for the equivalent surface area diameter or xV for the equivalent volume diameter.

[Извор: ИСО 26824:2013, 1.6]

3.1.7 Расподела величине честица. PSD

The cumulative distribution of material fractions less than a given particle size (size too small), expressed by the distribution density of material fractions in an equivalent spherical diameter or other linear size or size class divided by the width of the class

Белешка 1: Particle size distribution is described in ISO 9276-1.

3.1.8 Condensed particle counter

Instruments for measuring aerosol particle number concentrations (3.1.1)

Белешка 1: The particle size detected is usually less than a few hundred nanometers and larger than a few nanometers.

Белешка 2: CPC is a possible detector for use with DEMC.

Белешка 3: In some cases, a condensed particle counter may be called a condensed matter nucleus counter (CNC).

[Извор: ИСО 15900:2009, 2.5]

3.1.9 Differential electromobility classifier

A classifier capable of selecting aerosol (3.1.1) particles based on electromobility and passing them to the outlet

Белешка 1: DEMC classifies aerosol particle sizes by balancing the electrical power on each particle with its aerodynamic resistance in an electric field. Classified particles fall within a narrow range of electromobility determined by the operating conditions and physical size of the DEMC, while they can have different sizes due to the amount of charge they have.

[Извор: ИСО 15900:2009, 2.7]

3.1.10 Differential mobility analysis system DMAS

System for measuring sub-micron aerosol (3.1.1) particle size distribution, consisting of DEMC, flow meter, particle detector, interconnecting pipe, computer and suitable software

[Извор: ИСО 15900:2009, 2.8]

3.2 Specific terms and definitions

3.2.1 Particle release in paints, varnishes and plastics

Due to mechanical stress, materials are transferred from paints, varnishes and plastics to liquids or gases

3.2.2 Particle number Release n

The total number of particles within a specified size range that are released from the specimen due to mechanical stress

3.2.3 The number of particles in a specific area releases nA

Particle number release (3.2.2), divided by the stressed surface area of the specimen

3.2.4 Mass release by particle number

Number of particles released (3.2.2), divided by the mass of material removed

3.2.5 Total volume flow

Volume flow, which absorbs all air transport emissions at the particle source and transfers them

3.2.6 Particle number concentration nV

Number of particles per volume of air

3.2.7 Process concentration

Particle number concentration (3.2.6), total volume flow rate due to mechanical stress on the specimen (3.2.5), and particle number release (3.2.2)

3.2.8 Measuring concentration

The particle number concentration (3.2.6) is calibrated by a specified process concentration dilution (3.2.7) to establish better conditions for aerosol analysis

3.2.9 Concentration of model room

Particle number concentration (3.2.6), which results from the release of particle number in a specific area under better mixing conditions at a specified room height (3.2.3)

Белешка 1: Intermodel concentrations are independent of the selected test conditions and represent reference concentrations for actual particle number concentrations (на пример., particle pollution in a laboratory) when the intermodel heights are carefully selected.

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.

ИСО 21683-2019 “Ослобађање нано-објеката од боја, лакови и тонирана пластика експериментално симулирани за одређивање пигмената и пунила”

Дели овај пост

Повезан Постови