Low Mw-lignin fractions together with vegetable oils as available oligomers for novel paper-coating applications as hydrophobic barrier |
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| Authors: | Stefan Antonsson Gunnar Henriksson Mats Johansson Mikael E Lindström |
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| Institution: | 1. Cellulose and Paper Department, National Research Centre, 33 El-Bohouth Street, Dokki, Giza 12622, Egypt;2. Advanced Materials and Nanotechnology Group, Centre of Excellence for Advanced Sciences, National Research Centre, 33 El-Bohouth Street, Dokki, Giza 12622, Egypt;1. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China;2. Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China;3. Forest Products Laboratory, U.S. Forest Service, U.S. Department of Agriculture, Madison, WI 53726, USA;1. MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Qinghua East Road 35, Haidian, 100083 Beijing, China;2. Renewable Materials Program, Department of Forest, Rangeland and Fire Sciences, University of Idaho, 875 Perimeter Drive MS1132, Moscow, ID 83844-1132, USA;1. Departamento de Ciências Florestais, Universidade Federal de Lavras, Cx P. 3037, 37200-000, Lavras, MG, Brazil;2. Instituto de Tecnologia de Alimentos, Universidade Estadual de Campinas, CEP 13070-178, São Paulo, SP, Brazil;3. Departamento de Ciência dos Alimentos, Universidade Federal de Lavras, Cx P. 3037, 37200-000, Lavras, MG, Brazil;1. Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia;2. Bioresource, Paper and Coating Technology, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia |
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| Abstract: | Lignin residues are available in large amounts as kraft lignin from chemical pulping processes. This lignin is mainly incinerated in recovery boilers. The recovery boilers are often the bottle-necks in the overall pulping process when pulp production increases are desired. Through cross-flow nano-filtration of the black liquor from kraft pulping, a low-molecular weight lignin fraction can be removed thus decreasing the organic load on the recovery boilers. The low-molecular weight lignin fraction furthermore exhibit different characteristics compared to other commercial kraft lignins and represents a new raw material source in novel applications.The low-molecular weight lignin was used together with a vegetable oil to produce a new hydrophobic lignin derivative similar to suberin. The lignin and the lignin derivative was analysed with FT-IR, UV–vis and SEC. The ability of the product to make paper surfaces hydrophobic was also evaluated.The results demonstrate the possibility to make a suberin-like lignin derivative that is potentially of interest in paper-coating applications due to its capability to interact well with wood fibres and make paper hydrophobic. |
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