DE102017215744A1 - Method and system for determining a degree of porosity of hair - Google Patents

Abstract

In various embodiments, a method for determining a degree of porosity of a user's hair is provided. The method may include determining a BET specific surface area of the hair using the BET device and determining a degree of porosity based on the BET specific surface area.

Description

The invention relates to a method and a system for determining a degree of porosity of hair and method for determining a recommendation regarding hair of a user.

Users often know little about the condition of their hair and often take wrong care and styling products that produce, for example, other than the desired hair color or the like.

In particular, users often do not know which degree of hair damage and / or which porosity their hair has.

In various embodiments, a method for determining hair porosity is provided. Hair porosity can be determined in terms of a number and size of pores, with the aim of determining suitable parameters for applying a hair dye (also referred to as hair coloring).

The porosity in an interior of the hair can be measured in various embodiments by means of a so-called BET apparatus. The measurement of porosity by means of the BET apparatus can be based on adsorption of nitrogen and determined by means of a BET isotherm.

In various embodiments, measurement results of the BET apparatus (e.g., the BET isotherm) may be used to determine a specific BET surface area of the user's hair. By means of a data processing device, e.g. by software, e.g. an app, hair porosity can be determined in various embodiments on the basis of the specific BET surface area of the hair using calibration data.

In various embodiments, the data evaluation may be based on a recommendation, e.g. a product and / or hair treatment recommendation in which a treatment result may depend on hair porosity, e.g. a hair color. For example, to achieve a desired hair color, a hair dyeing product can be detected. In addition, an exposure time of the hair dyeing product can be determined.

In various embodiments, a care product can be determined depending on the hair porosity.

In various embodiments, the determined recommendation can be provided to the user, for example by means of displays on a display device.

The display device may be part of an electronic data processing device in various embodiments.

In various embodiments, the display device may include a smartphone, a tablet, a phablet, a laptop, or the like.

In various embodiments, a method for determining a degree of porosity of a user's hair is provided. The method may include determining a BET specific surface area of the hair using the BET device and determining a degree of porosity based on the BET specific surface area.

In various embodiments, determining the degree of porosity may include assigning a degree of porosity of a plurality of degrees of porosity to a range of BET specific surface areas of a plurality of areas of BET specific surface area according to a mapping rule.

In various embodiments, the assignment rule may be based on calibration measurements on hair samples of known porosity.

In various embodiments, the hair sample may have a weight in a range of 0.05 g to 2.00 g.

In various embodiments, the determination of the degree of porosity can be done by means of a portable data processing device.

In various embodiments, the method may further include providing the determined degree of porosity.

In various embodiments, providing the determined degree of porosity may include displaying on a display.

In various embodiments, a method for determining a recommendation regarding a user's hair is provided. The method may include determining a porosity of hair of the user according to various embodiments and determining a recommendation of the hair based on the determined degree of porosity.

In various embodiments, the recommendation may include at least one of a product recommendation and a hair treatment recommendation.

In various embodiments, the product recommendation may include recommending products having a porosity level dependent content of at least one hair replenisher.

In various embodiments, the at least one hair replenisher may comprise at least one of a group of hair replenishers, which group may include lactic acid, urea, uric acid, and dicarboxylic acids. Suitable dicarboxylic acids include in particular succinic acid and / or maleic acid.

In various embodiments, a system for determining a degree of porosity of a user's hair is provided. The system may include a BET device for detecting a BET specific surface area of the hair by means of the BET device and a data processing device for determining a degree of porosity based on the BET specific surface area.

In various embodiments, the data processing device may have an assignment rule based on calibration measurements on hair samples with a known degree of porosity.

In various embodiments, the data processing device may include a portable data processing device.

In various embodiments, the portable computing device may include a smartphone, a tablet, or a phablet.

Embodiments of the invention are illustrated in the figures and are explained in more detail below.

• 1 ein Flussdiagramm eines Verfahrens zum Ermitteln eines Porositätsgrads gemäß verschiedenen Ausführungsbeispielen.
• 2A und 2B schematische Darstellungen eines Systems zum Ermitteln eines Porositätsgrads von Haaren gemäß verschiedenen Ausführungsbeispielen; und
• 3 ein Flussdiagramm eines Verfahrens zum Ermitteln einer Empfehlung bezüglich Haaren eines Nutzers gemäß verschiedenen Ausführungsbeispielen.

Show it

• 1 a flowchart of a method for determining a Porositätsgrads according to various embodiments.
• 2A and 2 B schematic representations of a system for determining a degree of porosity of hair according to various embodiments; and
• 3 a flowchart of a method for determining a recommendation regarding hair of a user according to various embodiments.

In the following detailed description, reference is made to the accompanying drawings which form a part of the present application and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology such as "top", "bottom", "front", "back", "front", "rear", etc. is used with reference to the orientation of the described figure (s). Because components of embodiments can be positioned in a number of different orientations, the directional terminology is illustrative and is in no way limiting. It should be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. It is understood that the features of the various described herein Example embodiments can be combined with each other, unless specifically stated otherwise. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

1 shows a flowchart 100 a method of providing hair condition information according to various embodiments.

2A and 2 B show schematic representations of a system 200 for determining a degree of porosity of hair 122 according to various embodiments.

The system can be a BET measuring device 102 (also referred to as BET apparatus or BET apparatus).

The BET measuring device 102 can, as in 1B shown, an adsorption vessel 118 in which a sample of the hair 122 entered by the user.

wobei n = im Gleichgewicht adsorbierte Gasmenge
n_m = Monoschichtkapazität, d.h. die Gasmenge, die für die vollständige Bedeckung der Adsorptionsoberfläche mit einer Monolage benötigt wird
c = Konstante ( $e^{\frac{\left(q_1-q_2\right)}{RT}};$

mit q₁ = Adsorptionswärme und q₂ = Kondensationswärme)
p = Geichgewichtsdruck des Adsorptivs
p₀ = Sättigungsdampfdruck des Adsorptivs (hier: 767 Torr bei 77,4 K)The BET device 102 can also valves (taps) 106 . 108 . 112 and 116 for metering the nitrogen, an oil pump (not shown) and a diaphragm gauge 114 exhibit. In various embodiments, the BET specific surface area may be determined using: $$\frac{n}{n_m}=\frac{c\cdot p}{\left(p_0-p\right)\cdot \left(1+\left(c-1\right)\frac{p}{p_0}\right)}$$

where n = in equilibrium adsorbed amount of gas
n _m = monolayer capacity, ie the amount of gas needed to completely cover the adsorption surface with a monolayer
c = constant ( $e^{\frac{\left(q_1-q_2\right)}{RT}};$

with q ₁ = heat of adsorption and q ₂ = heat of condensation)
p = Geichgewichtsdruck the adsorptive
p ₀ = saturation vapor pressure of the adsorptive (here: 767 Torr at 77.4 K)

In various embodiments, it may be necessary to perform a calibration measurement before an actual porosity determination.

• V1 = das Volumen im unteren Teil des Adsorptionsgefäßes 118, d.h. das gekühlte Volumen beim Eintauchen in den flüssigen Stickstoff
• V2 = Restvolumen der Apparatur 102
• V3 = Zusatzvolumen, das bei steigendem Druck im Membranmanometer 114 entsteht
• V1 kann mittels einer Differenzwägung ermittelt werden. Das Adsorptionsgefäß 118 wird zuerst leer gewogen, dann bis zur Oberkante mit Wasser gefüllt gewogen. Reste von Wasser können anschließend im Vakuum mittels Ausheizens des Adsorptionsgefäßes 118 entfernt werden.

For this purpose, an internal volume of the measuring device can be divided into three areas:

• V1 = the volume in the lower part of the adsorption vessel 118 ie the cooled volume when immersed in the liquid nitrogen
• V2 = residual volume of the apparatus 102
• V3 = additional volume, which increases with increasing pressure in the membrane manometer 114 created
• V1 can be determined by means of a differential weighing. The adsorption vessel 118 is first weighed empty, then weighed to the upper edge filled with water. Residues of water can then be removed in vacuo by heating the adsorption vessel 118 be removed.

Assuming that V3 << V2 and V3 << V1, V3 can be neglected and the residual volume of the apparatus 102 be calculated on the ideal gas law.

1. 1. Die ganze Apparatur 102 inklusive Adsorptionsgefäß 118 wird für einige Minuten evakuiert. Das Adsorptionsgefäß 118 wird ausgeheizt. Ventil 106 ist geschlossen, Ventile 108, 112 und 116 sind geschlossen.
2. 2. Spülen der Apparatur bei abgebautem Adsorptionsgefäß 118 mit Stickstoff für mindestens 15 Minuten. Ventile 106,108 und 112 offen, Ventil 116 geschlossen.
3. 3. Apparatur evakuieren. Ventile 106, 112 geschlossen, Ventile 108 und 116 offen.
4. 4. Füllen eines Dosiervolumens zwischen Ventil 108 und Ventil 112 mit Stickstoff aus einem Stickstoff-Vorratsgefäß (nicht dargestellt).
5. 5. Einlass von Stickstoff im Dosiervolumen in die Apparatur 102. Hierzu Ventil 108 öffnen und anschließend wieder schließen.
6. 6. Ablesen des Drucks am Membranmanometer 114.

In various exemplary embodiments, the calibration measurement (determination of V2 ) as follows:

1. 1. The whole apparatus 102 including adsorption vessel 118 is evacuated for a few minutes. The adsorption vessel 118 is heated up. Valve 106 is closed, valves 108 . 112 and 116 are closed.
2. 2. Rinse the apparatus with degraded adsorption vessel 118 with nitrogen for at least 15 minutes. valves 106 . 108 and 112 open, valve 116 closed.
3. 3. Evacuate the apparatus. valves 106 . 112 closed, valves 108 and 116 open.
4. 4. Fill a dosing volume between the valve 108 and valve 112 with nitrogen from a nitrogen storage vessel (not shown).
5. 5. Inlet of nitrogen in the dosing volume in the apparatus 102 , For this valve 108 open and then close again.
6. 6. Reading the pressure on the membrane manometer 114 ,

• 7. Eintauchen des Absorptionsgefäßes 118 in flüssigen Stickstoff.
• 8. Ablesen des Drucks am Membranmanometer 114.
• 9. Wiederholen von Schritt 4-6 zur Bestimmung weiterer Druckwerte.

At the beginning are the steps 4 - 6 to repeat up to 80-100 mbar in the apparatus 102 are reached.

• 7. Immerse the absorption vessel 118 in liquid nitrogen.
• 8. Reading the pressure on the diaphragm manometer 114 ,
• 9. Repeat step 4 - 6 for determining further pressure values.

• eine definierte Menge an zu untersuchende Haar 122 wird klein geschnitten, in das Absorptionsgefäß 118 eingewogen und anschließend im Vakuum ausgeheizt. Bei Haaren mit erhöhter Porosität = erhöhter Anzahl an Mikroporen sollte mindestens 4 Stunden mithilfe eines Heizpilzes ausgeheizt werden. Je nach zu erwartender Haarporosität werden zwischen 100 mg bis 1,5 g Haar verwendet. p und p_R werden nach einem der Kalibrationsmessung analogen Verfahren bestimmt. Bei jeweils zehn Messpunkten ergibt sich eine entsprechende Anzahl von Druckwertepaaren, mit deren Hilfe sich die im Gleichgewicht adsorbierte Gasmenge N berechnen lässt. $$n=\frac{1}{m\cdot R}\left\{\left(\frac{p_R}{T_R}-\frac{p}{T}\right)\cdot \left(V_1-\frac{m}{\rho }\right)+\left(p_R-p\right)\cdot \frac{V_2}{T_R}\right\}$$
  
  wobei m = Masse der Probe p_R = Manometer-Anzeige (in mbar) bei Raumtemperatur T_R (in Kelvin) p = Manometer-Anzeige bei Eintauchen von V in flüssigen Stickstoff V₁, V₂ = Teilvolumina in ml ρ = Dichte der Probe

Determining a specific surface of internal hair porosity:

• a defined amount of hair to be examined 122 is cut small, in the absorption vessel 118 weighed and then heated in vacuo. Hair with increased porosity = increased micropores should be boiled for at least 4 hours using a heated mushroom. Depending on the expected hair porosity between 100 mg to 1.5 g hair are used. p and p _R are determined according to a procedure analogous to the calibration measurement. Every ten measuring points results in a corresponding number of pairs of pressure values, with the help of which the gas quantity N adsorbed in the equilibrium can be calculated. $$n=\frac{1}{m\cdot R}\left\{\left(\frac{p_R}{T_R}-\frac{p}{T}\right)\cdot \left(V_1-\frac{m}{\rho }\right)+\left(p_R-p\right)\cdot \frac{V_2}{T_R}\right\}$$
  
  where m = mass of the sample p _R = pressure gauge (in mbar) at room temperature T _R (in Kelvin) p = pressure gauge display when immersing V in liquid nitrogen V ₁ , V ₂ = partial volumes in ml ρ = density of the sample

Trägt man $\frac{p}{n\cdot \left(p_0-p\right)}$

gegen $\frac{p}{p_0}$

auf, so lassen sich aus der Steigung und dem Ordinationsabschnitt der geraden die Konstante C und die Monoschichtkapazität berechnen. Aus der Monoschichtkapazität kann bei bekanntem Platzbedarf A_n eines adsorbierten Moleküls die spezifische BET-Oberfläche S der inneren Haarporosität berechnet werden: $$S=n_m\cdot N_A\cdot A_n$$

wobei N_A = Loschmidt'sche Zahl $${\text{A}}_{\text{n}}\left({\text{N}}_{\text{2}}\right)=\mathrm{16,2}{\text{ Å}}^2$$

The obtained values of N and the corresponding equilibrium pressures P can now be used in the BET isotherm, which is converted into a straight-line equation for evaluation: $$\frac{p}{n\cdot \left(p_0-p\right)}=\frac{1}{n_m\cdot c}+\frac{c-1}{n_m\cdot c}\cdot \frac{p}{p_0}$$

You wear $\frac{p}{n\cdot \left(p_0-p\right)}$

versus $\frac{p}{p_0}$

The constant C and the monolayer capacitance can be calculated from the slope and the ordination section of the straight line. From the monolayer capacity can be known space requirements A _n of an adsorbed molecule, the BET specific surface area S of the internal hair porosity is calculated: $$S=n_m\cdot N_A\cdot A_n$$

where N _A = Loschmidt's number $${\text{A}}_{\text{n}}\left({\text{N}}_{\text{2}}\right)=16.2{\text{Å}}^2$$

On the basis of the measured values and by means of appropriate evaluation (for example by comparing the specific BET surface area with specific BET surfaces, which were determined in calibration measurements for hair of known porosity), the hair porosity can be determined, for example as hair porosity grade of a hair porosity grading scale.

The porosity of the hair used for the calibration measurements can be determined in various embodiments by means of essentially known methods, for example microscopically.

An assignment rule for ranges of specific BET surface areas to degrees of porosity determined on the basis of the calibration measurements can be stored in a database, which can be stored, for example, in the data processing device.

One for hair 122 The BET specific surface area determined in various embodiments can range from greater than 0 m ² / g to about 10000 m ² / g, usually in a range from about 300 m ² / g to about 4000 m ² / g.

The determined region may in various embodiments be assigned a multistage porosity scale, for example a porosity scale of about 6 steps (e.g., from 0 to 5, where 0 may correspond to very low porosity and 5 may correspond to very high porosity). In various embodiments, for example, 2-3 degrees of porosity can be distinguished.

An example assignment rule is given in the following table: BET surface area Haarporositätsgrad <600 m ² / g low 600 m ² / g - 1200 m ² / g moderate > 1200 m ² / g strongly

The specific BET surface of the hair 122 the user can be determined for example in a laboratory, which the user his hair sample 122 leaves (eg sends or gives away).

The specific BET surface of his hair 122 can be provided to the user, eg from the laboratory. The BET surface can, for example, be transmitted electronically, for example as a signal 224 , eg as a wireless signal, eg via WLAN, 3G or similar. In such a case, the data processing device 226 be set up to take over the specific BET surface in the software, such as the app, and to determine the degree of porosity based on the specific BET surface, for example by using the assignment rule, for example as shown above in the table. It should be understood that the table is exemplary only and other assignments of specific BET surface area to degree of porosity may be used.

In various embodiments, the BET specific surface may be provided to the user in other ways, eg, communicated in writing or orally, and the user may transfer the value communicated thereto to the data processing device by means of the input device 226 enter.

Alternatively, the determination of the degree of porosity is not performed by the data processing device 226 but by means of a processor cloud architecture and the determined degree of porosity is transmitted wirelessly to a portable data processing device and outputted by it, for example, displayed or by voice output. The porosity level assignment rule may be stored in a processor cloud architecture, and the method may further include updating the mapping rule based on new porosity grade assignments to specific BET surfaces from a plurality of other users.

In various embodiments, the determination of hair porosity may be combined with other hair condition / hair damage degree measurements, e.g. Differential scanning calorimetry (DSC), tensile strain (which can be determined, for example, by means of an interference reflection microscope), near infrared spectroscopy (eg to determine a cysteic acid content), fluorescence analysis (also to determine the cysteic acid content), etc. In combination with the methods described herein may allow for more accurate determination of a hair condition (for example, degree of hair damage).

In various embodiments, the further measurements regarding the hair condition (e.g., hair damage) may be made by means of that which also performs the BET measurement, for example, by the laboratory.

In various exemplary embodiments, the user may have a measuring device which is suitable for carrying out the measurement with regard to the hair condition (for example hair damage).

In various embodiments, the further measurement results can be provided directly to the software, eg the app, for example as a signal 224 , and / or the measurement results can be entered by the user into the software, eg the app, eg by means of the input device.

In various embodiments, hair 122 from various areas of a hairstyle, for example as a hair sample of hair tips and a hair sample of hair 122 near the scalp. This makes it possible to determine a distribution of hair porosity in the hairstyle of the user.

To the degrees of hair porosity, suitable hair colorants and / or hair care agents and / or hair styling agents may be recommended in various embodiments.

3 shows a flowchart of a method 300 for determining a recommendation regarding hair of a user according to various embodiments.

The method may include determining a porosity of hair of the user 310 ), and determining a recommendation on the hair based on the determined degree of porosity (in 320 ).

The hair treatment agents and / or hair treatment recommendations suitable for a degree of hair porosity may be stored in the database in various embodiments.

For hair 122 With low porosity (few small pores) strongly alkaline hair dyes and / or hair care products with low to medium care content can be recommended.

For hair 122 with moderate porosity (many small pores), moderately alkaline hair dyes and or medium to high care hair care products may be recommended.

For hair 122 With high porosity (many large pores), low alkaline hair dyes and / or high care hair care products may be recommended in various embodiments.

The method may also include initiating an online ordering operation of the recommended hair treatment agent and / or providing an indication of where the recommended hair treatment agent is available.

The method may also include initiating an ordering process of individually prepared hair treatment compositions, preferably by accessing a website of a manufacturer of individual colorants and / or individual hair care products and / or hair styling agents.

More and more customers are looking for a product that is individually tailored to their needs. This can be a product manufactured especially for the customer or a so-called "mass customized" product. In the case of a "mass customized" product, an individualization can be achieved by varying a few characteristics of a product that are decisive from the customer's point of view. Preferably, these "mass customized" products are based on the concept of modularization, that is, the product can be assembled individually from various modules / building blocks.

Often, there are many dependencies between the many different features / ingredients of a product, which can be expressed as "commandments" or "prohibitions." In order to obtain a clear product definition, it may be advantageous for the ordering process to proceed with the aid of a product configurator. This configurator helps the customer to select the characteristics / ingredients and draws attention to the permitted / inadmissible combinations of features, the latter then can not be selected.

For hair dyes, hair care products and hair styling agents, the relevant product characteristics include, in particular, the chemical ingredients of the compositions, the physical properties of the compositions and the ready-madeness of the compositions. With the help of a product configurator, for example, the selection of chemically and / or physically incompatible ingredients or the selection of the determined degree of porosity of unsuitable ingredients can be avoided. Conversely, the selection for the determined degree of porosity of suitable ingredients can be specified or proposed by the product configurator.

The product recommendation can in various embodiments be based on a comparison with empirical data which can be stored in a database and can be retrieved by means of a device (for example smartphone, tablet, phablet, etc.) by entering the determined hair porosity.

In various embodiments, the hair treatment recommendation may include visiting a hairdresser. In various embodiments, a booking process can be initiated directly via the software / app, which determines the degree of porosity. For this purpose, for example, the contact details of hairdressers can be stored in the software / app and these are displayed to the user. In addition, the selection can be restricted via filters, such as the postal code. In various embodiments, an appointment booking can be made directly via the software / app. Alternatively, a hairdresser's appointment can be made through a separate software / app, such as Treatwell.

In various embodiments, the determined hair porosity in conjunction with (other) hair damage measurements may allow a more accurate determination of a general level of hair damage.

While healthy hair has some hair porosity (up to about a medium degree of porosity), high hair porosity can be considered as hair damage, and accordingly a hair porosity measurement as a method of detecting hair damage.

In various embodiments, a user may be provided with a way to select a hair dye that corresponds to his hair condition (for example, degree of hair damage).

In various embodiments, a user may be provided with a way to select a hair care product to match its hair condition (e.g., degree of hair damage).

In various embodiments, a user may be provided with a means to select a hair styling agent to match its hair condition (e.g., degree of hair damage).

In various embodiments, the hair care product and / or the hair dye and / or the hair styling product may comprise a hair replenisher.

In the following table, care products (which may, for example, comprise hair-filling substances) are assigned to the hair porosity values by way of example: Haarporositätsgrad product recommendation low Product 1, having no hair-replenishing substances except water moderate Product 2, containing in addition to water 1% lactic acid, 1% urea, 1% uric acid strongly Product 3 containing, in addition to water, 1% lactic acid, 1% urea, 1% uric acid, 0.2% dicarboxylic acid (s)

In various embodiments, the substances or some of the substances recommended as constituents of the hair care products may be provided as constituents of hair dyes or of hair styling agents.

Further advantageous embodiments of the method will become apparent from the description of the device and vice versa.

Claims (15)

A method of determining a degree of porosity of a user's hair, comprising: determining a BET specific surface area of the hair using the BET device; Determine a degree of porosity based on the specific BET surface area. Method according to Claim 1 wherein determining the degree of porosity comprises assigning a degree of porosity of a plurality of degrees of porosity to a range of BET specific surface areas among a plurality of areas of BET specific surface area according to an assignment rule. Method according to Claim 2 , where the assignment rule is based on calibration measurements on hair samples with a known degree of porosity. A method according to any one of the preceding claims, wherein the hair sample has a weight in a range of 0.05 g to 2.00 g. Method according to one of the preceding claims, wherein the determination of the degree of porosity by means of a portable data processing device. The method of any one of the preceding claims, further comprising: Providing the determined degree of porosity. Method according to Claim 6 wherein the determination of the degree of porosity is effected by means of a processor cloud architecture and the determined degree of porosity is output by means of a portable data processing device. A method of determining a recommendation for a user's hair, comprising: determining a porosity of hair of the user according to any one of Claims 1 to 7 ; and determining a recommendation of the hair based on the determined degree of porosity. Method according to Claim 8 wherein the recommendation includes at least one of a product recommendation and a hair treatment recommendation. Method according to Claim 9 wherein the product recommendation comprises recommending products having a porosity level-dependent content of at least one hair replenisher. Method according to Claim 10 wherein the at least one hair replenisher comprises at least one of a group of hair replenishers, the group comprising: lactic acid; Urea; Uric acid; and dicarboxylic acids. Method according to one of Claims 8 to 11 , further comprising: triggering an online order of a recommended product. A system for determining a degree of porosity of a user's hair, comprising: a BET device for detecting a BET specific surface area of the hair by means of the BET device; and a data processing device for determining a degree of porosity based on the BET specific surface area. System according to Claim 13 in which the data processing device has an assignment rule based on calibration measurements on hair samples with a known degree of porosity. System according to Claim 13 or 14 wherein the data processing device comprises a portable data processing device.

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