Novel dendrimers for papermaking applications

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Title: Novel dendrimers for papermaking applications.Dendritic macromolecules with tailorable internal and surface structure offer excellent opportunities in designing novel materials for interactions with papermaking suspensions. Professor Kakkar's group has developed a simple synthetic methodology that allows the construction of a variety of globular and dumb-bell shaped dendrimers. The synthesis is flexible using an adaptive template core, and has allowed the build-up of several generations without separation steps in between, making the process easy and cost-effective. These dendrimers contain hydroxyl groups at their periphery that can be used to readily functionalize these dendrimers with entities including carboxyl, amine, sulfonate, aldehyde etc. This allows us to custom design these dendrimers with desired properties. It is proposed to apply these dendrimers to papermaking suspensions, either as part of a dual component retention aid system or as strength agents. The efficiency of such retention aids, the drainage during forming and the strength (wet web, wet and dry strength) of hand sheets will be determined by a number of techniques, including new ones developed by Prof, van de Ven.The potential benefits for Canada are the introduction of a new product lines in the Canadian Pulp and Paper Industry, consisting of tailor-made dendrimers and highly branched polymers. Canadian companies will be targeted first to implement any new technology arising from this grant, giving them a competitive edge over competitors.