ABSTRACTS 2017 AOCS ANNUAL MEETING AND INDUSTRY SHOWCASES April 30–May 3, 2017 S&D 1: Fabric Care Performance Boosters and New Benefits Chairs: Kathleen Stanton, American Cleaning Institute, USA; and Tyler Smith, Lightbox Laboratories, LLC, USA Rational Design of Lipases: A Case Study. Jakob detergent formulations protease may negatively Skjold-Jørgensen*, Novozymes A/S, Denmark impact the cellulase activity over time, resulting in When it comes to caring for their clothes, loss of fabric care properties. Therefore, an consumers want to save time and money with a improvement of the storage stability properties of high expectation on performance. With an cellulase is required. DuPont has applied molecular increasing number of consumers using the “Quick modelling software and structure function analysis wash” cycle to save time, water and energy costs, to generate hypotheses about regions of the concerns with incomplete stain removal also arise. enzyme that may be susceptible to instability. Average wash temperatures have been falling Functional studies identified the cleavage sites driven by appliance manufacturers designing where we could influence the properties of machines to meet Energy Star requirements. improved performance and stability. These Colder wash cycles address key consumer needs of improved properties of the new cellulase were fabric care and preservation, but cleaning confirmed in application studies under North efficiency is lower than with warm water. This talk American wash conditions, as well as storage demonstrates how catalytic enzymes enable better stability trials in typical US liquid detergents cleaning with shorter wash cycles and colder wash comprising protease. temperatures. Breakthrough Solution for Odor Reduction in Engineering an Improved Cellulase for Fabric Care Cleaning Products. Anita Augustyniak, and Yvon G. in Liquid Detergents. Christian Adams*1, Andre Durant*,Itaconix, USA Krouwer2, and Arjen J. Hoekstra2,1DuPont Industrial Odor management is a core component of Biosciences, USA; 2DuPont Industrial Biosciences, cleaning functions. Odor in various textiles, such as The Netherlands laundry, sport equipment, upholstery and carpets A global fabric care study carried out by DuPont are assaulted by combinations of odors ranging highlighted considerable consumer dissatisfaction from pet urine to bodily fluids to food waste. Odor with pilling and color fading on garments after management in cleaning products is often a using most detergents. In general, liquid detergents combination of detergency (odor extraction to provide better fabric care properties than laundry solution), oxidation and masking. However, some powders, and in most mature markets, including odors are persistent even after oxidation and recur North America; liquids have become the dominant once masking has dissipated. This is due to the high product format. Cellulase is known for providing susceptibility of the human nose to a set of odors multi cycle fabric care benefits such as pilling that we culturally associate as unwanted. Thiol and prevention and color maintenance. However, liquid amine derivatives are some of the most persistent detergents provide a challenge to the product molecules that can be detected by our noses at sub formulator for delivering robust fabric care ppb level. A breakthrough strategy is to add performance with cellulase, especially in the molecules that have the ability to complex presence of proteolytic enzymes. In liquid malodorants into non-volatile molecules. - 1 - ABSTRACTS 2017 AOCS ANNUAL MEETING AND INDUSTRY SHOWCASES April 30–May 3, 2017 Complexes of Zinc-polyitaconate have the property prevent transfer of bacteria from bio-film to of maintaining zinc ions in solution across a wide clothes during washing. As a result, we found a range of pH, in complex aqueous matrices, while specific enzyme itself and further the combination drying to a non-oily residue. The zinc atom is able of the enzyme with some detergent components to coordinate with thiols or amines, to create Lewis are effective for the purpose. acid-base complexes that are non-volatile, while remaining in solution. Formulated products Laundry Detergency of Solid Non-particulate Soil containing these neutralizing metal-organic or Waxy Solids: Relation to Oily Soil Removal complexes are offering novel performance in odor Above the Melting Point. David A. Sabatini*1, John reduction, while eliminating unwanted residues on Scamehorn1, Jarussri Chanwattanakit2, and fabric. Sumaeth Chavadej2, 1University of Oklahoma, USA; 2Chulalongkorn University, Thailand Study on Bacterial Control During Washing with In this work, methyl palmitate or palmitic acid Laundry Detergent. Nanami Sasaki*, Keisuke Mori, methyl ester, a monoglyceride, was used as both a Takahiro Hayashi, Misa Nakagawa, Masayoshi model solid fat below the melting point and as an Oishi, Hiroaki Shindo, Hiroyuki Masui, and Takahiro oily soil above the melting point. An anionic Okamoto, Lion Corporation, Japan extended surfactant [branched alcohol propoxylate In recent times, awareness on personal hygiene sulfate sodium salt (C123-(PO)4-SO4Na)] was used has been increased year by year, especially, to remove methyl palmitate from cotton and from consumer needs on odor care in daily life has polyester. Above the melting point (~30ºC) of become higher. In response to this needs, many methyl palmitate, the maximum oily soil removal kinds of study on odor care have been conducted was found to correspond to the lowest dynamic in the fabric care field.So far, most of studies have interfacial tension (IFT), as is common with liquid been done focusing on 1) removing sebum soil, soils. Below the melting point, the lower the nutrition for bacteria, from fabric, or 2) preventing contact angle of the wash solution against the soil bacteria growth on fabric as a counter-measure for (indicating higher wettability), the higher the solid bacteria generating malodor. In this study we fat soil detergency. The removed methyl palmitate focused on the effect of bacteria present in was found to be mostly in unsolubilized droplets or washing tubs to reduce fabric malodor. First, we particles with a small fraction of micellar studied bacteria flora of bio-film on washing tub solubilization for both solid and liquid forms. The surfaces in 14 houses by using gene-sequences presence of surfactant can prevent the homology comparison. From this data, we found agglomeration of detached methyl palmitate that some kind of bacteria detected commonly in particles in both liquid and solid forms, reducing most houses have clear relation with malodor of redeposition and enhancing detergency. Below the washing tubs. These bacteria grew up and formed melting point, the surfactant aids the solution bio-film to stick firmly to the surface. These wetting the surfaces, then penetrating the waxy bacteria transferred to clothes during washing solid, causing detachment as small particles, and process then it became a cause of clothes malodor. dispersion of these particles. Unlike particulate soil Next, we tried to reduce the effect of bacteria on detergency, electrostatic forces are not an washing tub surface by approaching 1) to remove important factor in fatty soil detergency. bio-film or to inhibit bio-film forming, and 2) to - 2 - ABSTRACTS 2017 AOCS ANNUAL MEETING AND INDUSTRY SHOWCASES April 30–May 3, 2017 Polymers and Detergency—A Complex Game of Protect and Care—Silicone Effects for Perceivable Interactions. Keith E. Gutowski1, and Dieter Benefits. John H. Richards*,Wacker Chemical Boeckh*2,1BASF Corporation, USA; 2BASF SE, Corporation, USA Germany Consumers are continually seeking ways to Liquid laundry detergents are formulations maintain, refresh and enhance garment properties. predominantly based on surfactants. Polymers are Silicones utilized as rinse cycle additives generate added at much lower levels serving a variety of many perceivable consumer benefits. Color purposes like hardness- and rheology- fastness and shape retention are two such effects management, soil-dispersion or the prevention of that can be defined and quantified via application redeposition of soils or dyes. Primary and testing. An overview of novel silicone chemistries secondary detergency are areas that can be that protect fabrics will be provided, along with significantly relevant for the application of relevant practical test results. Performance polymers. While initially, when polymers were characteristics of treated garments are highlighted introduced to laundry detergents, the focus was on along with product recommendations for achieving anionic polymers, the scope of polymers applied the desired effects. today has widened and includes functional polymers with cationic character as well as nonionic amphiphilic structures. The variability and characteristics of functional polymers allows choices how the polymer can interact with the complex colloidal and interfacial situation found in a liquid detergent and during laundry. Charge, size and polarity as well as distribution of functionality determine if and how polymers associate with surfactants, interfaces and hardness ions. A study of the colloidal chemistry of selected polymers in mixed polymer-surfactant systems is presented. The influence of the selected surfactant system as well as of water hardness on association concentrations and phase behavior is studied. Examples show how modeling can help understand the solution behavior of these polymers and how they are affected by the