ISO/TS 19807-1:2019

Nanotechnologies — Magnetic nanomaterials — Part 1: Specification of characteristics and measurements for magnetic nanosuspensions

This document specifies the characteristics of magnetic nanosuspensions to be measured and lists measurement methods for measuring these characteristics. This is a generic document and does not deal with any particular application.

Nanotechnologies — Nanomatériaux magnétiques — Partie 1: Spécification des caractéristiques et des mesures pour les nanosuspensions magnétiques

General Information

• Status: Published
• Publication Date: 19-Jun-2019
• ICS: 07.120 - Nanotechnologies
• Technical Committee: ISO/TC 229 - Nanotechnologies
• Drafting Committee: ISO/TC 229/WG 4 - Material specifications
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 14-Sep-2022

Standards Content (Sample)

TECHNICAL ISO/TS
SPECIFICATION 19807-1
First edition
2019-06
Nanotechnologies — Magnetic
nanomaterials —
Part 1:
Specification of characteristics
and measurements for magnetic
nanosuspensions
Nanotechnologies — Nanomatériaux magnétiques —
Partie 1: Spécification des caractéristiques et des mesures pour les
nanosuspensions magnétiques
Reference number
ISO/TS 19807-1:2019(E)
©
ISO 2019

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ISO/TS 19807-1:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO/TS 19807-1:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 9
5 Characteristics and measurement methods of magnetic nanosuspensions .10
6 Reporting .12
Annex A (informative) Components of liquid suspensions of magnetic nanoparticles .13
Bibliography .15
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ISO/TS 19807-1:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 229, Nanotechnologies.
A list of all parts in the ISO/TS 19807 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
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ISO/TS 19807-1:2019(E)

Introduction
Nanomaterials offer the opportunity for new technologies at the interfaces between chemistry,
physics and biology. The term nanomaterial is used to refer to a wide range of particles, thin films,
self-assembling and lithographically produced structures in which at least one dimension is less than
100 nm. Magentic nanosuspensions are fluid nanodispersion, where the solid phase is formed by
magnetic nanoparticles.Magnetic nanosuspensions and bulk materials react to applied magnetic fields
in different ways. These unique properties enable the development of innovative technologies and
products.
Magnetic nanosuspensions have important potential industrial and healthcare applications such as
vacuum seals, lubricants, coolants, dampers, magnetic soaps, environmental remediation, medical
imaging, drug delivery technologies, magnetic hyperthermia therapy, etc. To satisfy the demands of
rapidly accelerating application markets, there is a strong need to provide universal definitions and
measurement methods for the characteristics of these suspensions. There are three components of
a magnetic nanosuspension: (1) magnetic nanoparticles (2) dispersing medium and (3) dispersant
(Annex A).
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TECHNICAL SPECIFICATION ISO/TS 19807-1:2019(E)
Nanotechnologies — Magnetic nanomaterials —
Part 1:
Specification of characteristics and measurements for
magnetic nanosuspensions
1 Scope
This document specifies the characteristics of magnetic nanosuspensions to be measured and lists
measurement methods for measuring these characteristics.
This is a generic document and does not deal with any particular application.
2 Normative references
There are no normative references for this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
AC susceptibility
complex ratio between the dynamic magnetization and the applied magnetic excitation field
i2πft−φ
()
Note 1 to entry: The dynamic magnetization is given as MM= e and the applied magnetic excitation
0
i2πft
field is given as HH= e . The AC susceptibility χ =MH/ is divided into an in-phase component (real part)
0
′′′
and an out-of-phase component (imaginary part): χχ=− iχ .
Note 2 to entry: In dependence on the type of magnetization that is used, the AC susceptibility of a material is
related to volume, mass or amount of the material.
M M
AC volume susceptibility 0VV0
χϕ=−cossi inϕ
V
H H
0 0
M M
AC mass susceptibility 0mm0
χϕ=−cossi inϕ
m
H H
0 0
M M
0nn0
AC molar susceptibility
χϕ=−cossi inϕ
n
H H
0 0
Note 3 to entry: AC susceptibility depends on the excitation field frequency and the temperature, which should
also be indicated.
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Note 4 to entry: The amplitude of the excitation field must be small enough so there is a linear relation between
the amplitude of the dynamic magnetization and the amplitude of the applied AC field.
3.2
agglomerate
collection of weakly or medium strongly bound particles where the resulting external surface area is
similar to the sum of the surface areas of the individual components
Note 1 to entry: The forces holding an agglomerate together are weak forces, for example van der Waals forces or
simple physical entanglement.
Note 2 to entry: Agglomerates are also termed secondary particles and the original source particles are termed
primary particles.
Note 3 to entry: Primary particles can themselves be composites particles with both magnetic and non-
magnetic parts.
[SOURCE: ISO/TS 80004-2:2015,3.4]
3.3
aggregate
particle comprising strongly bonded or fused particles, where the resulting external surface area is
significantly smaller than the sum of surface areas of the individual components
Note 1 to entry: The forces holding an aggregate together are strong forces, for example covalent or ionic bonds,
or those resulting from sintering or complex physical entanglement, or otherwise combined former primary
particles.
Note 2 to entry: Aggregates are also termed secondary particles and the original source particles are termed
primary particles.
[SOURCE: ISO/TS 80004-2:2015,3.5]
3.4
chemical composition
ratio of the quantities of the chemical elements present in the nanosuspension
Note 1 to entry: The quantities may be expressed in mass, volumen or number of moles.
3.5
core-shell nanoparticle
nanoparticle consisting of a core and shell(s)
Note 1 to entry: A related term nanostructured core-shell particle is defined in ISO/TS 80004-4.
Note 2 to entry: The largest external dimension/length (core diameter plus twice the shell thickness) has to be in
the nanoscale . For spherical core-shell nanoparticle, this length is the outer diameter.
Note 3 to entry: A related term, single-core magnetic nanoparticle, is defined in reference [1].
[SOURCE: ISO/TS 80004-2:2015,4.13]
3.6
curie temperature
temperature at which a ferromagnetic material passes from the ferromagnetic state to the paramagnetic
state and vice versa
[SOURCE: ISO 11358-1:2014, 3.3]
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3.7
differential magnetic susceptibility
differential ratio of the magnetization that is induced by a magnetic field change to the amplitude of the
magnetic field change
Note 1 to entry: The magnetic susceptibility of a material can be related to volume, mass or amount of the
material.
dM
volume susceptibility
V
χ =
V
dH
dM
mass susceptibility
m
χ =
m
dH
dM
n
molar susceptibility
χ =
n
dH
Note 2 to entry: The initial susceptibility χo is defined as the susceptibility at H = 0.
Note 3 to entry: Magnetic nanosuspensions are considered as magnetically isotropic and their magnetic
susceptibility is indicated as a scalar.
3.8
dispersant
additive that facilitates the dispersion of solid in the dispersing medium, and that increases the stability
against agglomeration of the mixture thereafter
[SOURCE: ISO 4618: 2014, 2.85, modified]
3.9
dispersing medium
liquid in which the sample is dispersed and suspended
[SOURCE: ISO 14703:2008, 3.5]
3.10
dry matter content
ratio of the mass of residues after drying at certain high temperature to that of sample before drying
3.11
dynamic viscosity
ratio between the applied shear stress and rate of shear of a liquid
Note 1 to entry: It is sometimes called the coefficient of dynamic viscosity, or simply viscosity.
Note 2 to entry: Dynamic viscosity is a measure of the resistance to flow or deformation of a liquid.
Note 3 to entry: The term dynamic viscosity can also be used in a different context to denote a frequency-
dependent quantity in which shear stress and shear rate have a sinusoidal time dependence.
[SOURCE: ISO 3104:1994, 3.3, modified]
3.12
equivalent diameter
diameter of a sphere that produces a response by a given particle-sizing method, that is equivalent to
the response produced by the particle being measured
Note 1 to entry: The physical property to which the equivalent diameter refers is indicated using a suitable
subscript (see ISO 9276-1:1998).
Note 2 to entry: For discrete-particle-counting, light-scattering instruments, an equivalent optical diameter is used.
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Note 3 to entry: Other material constants like density of the particle are used for the calculation of the equivalent
diameter like Stokes diameter or sedimentation equivalent diameter. The material constants, used for the
calculation, should be reported additionally.
[SOURCE: ISO/TS 80004-6:2013, 3.1.5]
3.13
fluid density
mass of unit volume of suspension at specific temperature
3.14
fluid nanodispersion
heterogeneous material in which nano-objects or a nanophase are dispersed in a continuous fluid phase
of a different composition
[SOURCE: ISO/TS 80004-4:2011, 3.5]
3.15
freezing point
temperature at which solid crystals form within the dispersing medium as the liquid nanoparticle
suspension is cooled under specified conditions of test
3.16
hydrodynamic diameter
equivalent diameter of a particle in a liquid having the same diffusion coefficient as the real particle in
that liquid
[SOURCE: ISO/TS 80004-6:2013, 3.2.6]
3.17
magnetic moment
vector quantity describing the ability of a magnetized body to produce a magnetic field outside its own
boundaries
3.18
magnetic nanoparticle
Nanoparticles with coupled atomic magnetic moment
3.19
magnetic field hyperthermia
the process where a time varying magnetic field of frequency f and amplitude H results in a temperature
o
T increase of a magnetic nanosuspension
3.20
magnetization
vector quantity describing the specific magnetic moment of a material
Note 1 to entry: The magnetic moment of a sample can be related to volume, mass or amount of substance of the
sample to obtain the magnetization.
μ
volume magnetization
m
M =
V
V
μ
mass magnetization
m
M =
m
m
μ
m
molar magnetization
M =
n
n
Note 2 to entry: The magnetization should be indicated for sufficiently homogeneous compartments of the
sample and those compartments should be mentioned (e.g. magnetization of the nanoparticle cores).
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3.21
magnetoviscosity
dynamic viscosity of a liquid suspension of magnetic nanoparticles in the presence of external
magnetic field
3.22
multi-core nanoparticle
core-shell nanoparticle with more than one physically separated core embedded in a matrix of shell
material
3.23
nanoparticle
nano-object with all external dimensions in the nanoscale where the lengths of the longest and the
shortest axes of the nano-object do not differ significantly
Note 1 to entry: If the dimensions differ significantly (typically by more than 3 times), terms such as nanofibre or
nanoplate may be preferred to the term nanoparticle.
[SOURCE: ISO/TS 80004-2:2015, 4.4]
3.24
nanophase
physically or chemically distinct region or collective term for physically distinct regions of the same
kind in a material with the discrete regions having one, two or three dimensions in the nanoscale
Note 1 to entry: Nano-objects embedded in another phase constitute a nanophase.
[SOURCE: ISO/TS 80004-4:2011, 2.12]
3.25
nano-object
discrete piece of material with one, two or three external dimensions in the nanoscale
Note 1 to entry: The second and third external dimensions are orthogonal to the first dimension and to each other.
[SOURCE: ISO/TS 80004-2:2015,2.2]
3.26
nanoscale
length range approximately from 1 nm to 100 nm
Note 1 to entry: Properties that are not extrapolations from a larger size are predominantly exhibited in this
length range.
[SOURCE: ISO/TS 80004-1:2015, 2.1]
3.27
nanosuspension
fluid nanodispersion (3.14) where the dispersed phase is a solid
Note 1 to entry: The use of the term “nanosuspension” carries no implication regarding thermodynamic stability.
[SOURCE: ISO/TS 80004-4:2011, 3.5.1]
3.28
particle
minute piece of matter with defined physical boundaries
Note 1 to entry: A physical boundary can also be described as an interface.
Note 2 to entry: A particle can move as a unit.
[SOURCE: ISO/TS 80004-2:2015,3.1]
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3.29
particle size
linear dimension of a particle determined by a specified measurement method and under specified
measurement conditions
Note 1 to entry: Different methods of analysis are based on the measurement of different physical properties.
Independent of the particle property actually measured, the particle size can be reported as a linear dimension,
e.g. as the equivalent spherical diameter.
Note 2 to entry: Particle size can be core diameter or hydrodynamic diameter depending on the appl
...