Knowde Enhanced TDS
Identification & Functionality+
Features & Benefits+
- 100% bio-based surfactant
- Sustainable palm oil derivative available
- Brilliant clarity over wide pH range and with inorganics
- Excellent cleaning performance
- No-stress cracking of plastics
- Medium to high foaming
- Good electrolyte and builder tolerance
- Wide pH tolerance
- Streak-free cleaning
- Used in highly concentrated formulations
- Reduced packaging
NatraSense AG-810 provides a wide range of formulating and performance benefits and is suitable for use in a multitude of cleaning applications. As well as providing excellent cleaning performance, it is especially suited to hard surface cleaning as it provides a non-streaky clean on glossy surfaces and is non-corrosive to syntheticmaterials, a common problem with many non-ionic surfactants.
Despite this being a highly concentrated product the low viscosity of NatraSense AG-810 makes this product remarkably easy to handle while maintaining all of the benefits of an alkyl polyglucoside, such as excellent wetting, penetrating and detergency properties favoured for products designed to clean surfaces such as glass,ceramic, plastic and metal. NatraSense AG-810 readily dissolves in high concentrations of sodium hydroxide and remains stable and can increase the solubility of other non-ionic surfactants in highly alkaline solutions.
NatraSense AG-810 can be used in concentrated liquid laundry applications, providing stability to the formulation. The lack of a gelling phase also provides the formulator with ease of use. In household and I&I applications, NatraSense AG-810 provides caustic stability, builder compatibility, detergency and hydrotroping benefits, therefore providing the formulator greater flexibility and improved cost performance.
Surfactant compatibilities in electrolyte and alkaline solutions were measured through the transparency of a blend made with a surfactant in a stock solution. The stock solutions used were made of sodium hydroxide or sodium chloride.The first solution has been prepared with a percentage weight/volume of 47% while the sodium chloride solution with a percentage of 25% and then blended at 2.5 grams of surfactant to 97.5 grams of solution with the following surfactants: sodium lauryl sulphate (SLS), sodium lauryl ether sulphate (SLES), linear alcohol ethoxylate (LAE),lauryl dimethylamine oxide (LDAO) and NatraSense AG-810 (AG-810).
The blends were then photographed in a VeriVide CAC60 colour fastness cabinet using the TT84 light setting against a black background. A section of the samples were then compared in the Figure1. A clear unbroken dark square indicates the formation of a clear solution through which the black background can be seen.
In high pH and high inorganic solutions NatraSense AG-810 forms a transparent stable solution, see Image 1and 2 below.
Image 1: Clarity of blends in 47% NaOH
Image 2: Clarity of bends in 25% NaCl
In order to determine the streak-free performance of NatraSense AG-810 a blind consumer panel study was conducted to assess mirrors treated with different surfactant solutions. Each solution was applied to half of a mirror tile using a disposable pipette, creating two circles of 10 dots, with eight drops forming a circle and the remaining two drops added side-by-side in the centre of the circle. Immediately after application the surface of the mirror was wiped 10 times using a paper towel folded into three and clipped with two binder clips to use as handles so that no downward pressure was applied. The tiles were left to air dry and then the panellists were asked to score the tiles out of 10, with 0 being no streaking and 10 being lots of streaking. All panellists independently identified the mirror treated with NatraSense AG-810 as having fewer streaks, classifying NatraSense AG-810 as a less streaking surfactant than the other commodity surfactants. This makes NatraSense AG-810 ideal for application in window/glass cleaners and car shampoo where streak-free performance is a must.
Image 3: SLS
Image 4: NatraSense AG-810
Figure1: Panel study assessing streaking performance comparing NatraSense AG-810 with a range of commercial surfactants.
Many surfactants can leave residues on surfaces after cleaning which leads to them still looking dirty or unsightly, however, NatraSense AG-810 leaves very low residue levels on drying. In order to assess the residue-free performance of NatraSense AG-810 a series of reflective black ceramic tiles were treated with various surfactants. Solutions of surfactants (5% active level) were applied via a spray application in a reproducible manner onto black ceramic tiles, each solution being applied to three tiles. The tiles were then allowed to dry overnight to see the effect of residue left on the surface.
The tiles were then analysed using a gloss meter at 20°, 60° and 85° and the % reduction in reflection measured.
Figure 2: Residue of surfactants on black tiles at 60° reflectance
Figure3: Panel Study to show the visible perception of residues of surfactants on black tiles
Foam heights were measured using the Ross Miles Foam test method. Each surfactant was measured as a 0.1% w/w solution in water at 25 ̊C and the initial foam height, foam height after 2,5, and 10 minutes were measured.The data for NatraSense AG-810 (Figure 4) showsmedium to high foam properties at different pH values making the product usable over a wide range of applications.Note also the initial foam height and level of stability at neutral and alkaline pH levels are shown in Figure 4, below.
Figure 4: Ross Miles foaming data for NatraSense AG-810 at pH 4, pH 7 and pH 10
The Draves Wetting test is a laboratory procedure used to rank the relative wetting efficiencies of surfactants.Wetting times are one of the important performance characteristics for a surfactant as they show how quickly a surfactant will wet out a surface in order to clean it. The figure belowshows the Draves Wetting times for NatraSense AG-810 compared with SLES at different pH values.
Figure5: Draves wetting times for NatraSense AG-810 and SLES
The contact angle(θ) is the angle at which the liquid–vapor interface meets the solid–liquid interface. The contact angle is determined by the resultant adhesive and cohesive forces. As the tendency of a drop to spread out over a flat, solid surface increases, the contactangle decreases. Thus, the contact angle provides an inverse measure of wettability. NatraSense AG-810 has demonstrated excellent contact angles at low concentration demonstrating high wetting propertiesand consequently good cleaning performance(Table 1)
Table1: Contact Angles at different concentration of NatraSense AG-810
In order to clean effectively, a surfactant first needs to form micelles so that it is capable of solvating oils and soils. TheCritical Micelle Concentration(CMC) measures the lowest concentration of a surfactant that will form micelles. The lower the CMC then the more effective the surfactant shouldbe at cleaning at low concentration levels. Before reaching the CMC (Critical micelle concentration), the surface tension changes strongly with the concentration of the surfactant, this can be seen in Figure 6 and Figure 7below. After reaching the CMC, the surface tension remains relatively constant. The value of the CMC for a given dispersant in a given medium depends on the temperature, pressure and (sometimes strongly) on the presence and concentration of other surface active substances and electrolytes. Micelles only form above critical micelle temperature. The value of CMC for NatraSense AG-810 at 25°C, atmospheric pressure, is 0.028% at 25°C.
Figure6: Surface tension vs concentration for NatraSense AG-810
Figure 7: Surface tension vs LN (concentration) for NatraSense AG-810
Applications & Uses+
|Value||Units||Test Method / Conditions|
|Surface Tension (at 0.5%)||29.5||Dyne/cm||-|
|CMC (at 25°C)||0.028||%||-|
|Viscosity (at 25°C)||2300||mPa.s||-|
Regulatory & Compliance+
Safety & Health+
NatraSense AG-810 is considered to be an acceptable raw material for laundry care hard surface cleaning and presents no special hazard.