Synthesis Of Cationized Cellulose From Pine Needles And Application In Paper Making
| 284 view(s) | 2021/08/13
嘉宾简介：Ph.D Scholar of Forest Research Institute, Dehradun, India
Cellulose, an interesting polymer, is largely abundant on earth. Its modification is also becoming more interesting and useful for many other applications such as in pharmaceuticals, paper industry and many more. Environmental pressure will continue to influence research into new strength chemicals and any new legislation creates opportunities for research groups to produce bio-based products. In this direction the development of cellulosic based derivatives may be dramatically increase the benefits which are desirable in strength of paper. Cellulose based derivatives, especially cationized cellulose, may provide a solution, because these products have the capacity to overcome the heterogeneity of real paper stock. Further, the development of these products from lignocellulosic waste could achieve a reduction of investment and raw material costs with the decline in the demand of competitive and conventional raw materials like cotton ﬁbers and wood pulp for modiﬁed cellulosic products. Pinus roxburghii Sarg. needles, is a lignocellulosic biomass in nature and is responsible for the major threat for forest fires in summer season as its leaf surface has a waxy coating over it which makes it highly inflammable. For this purpose we took an initiative for its better utilization and application as strength additive in paper making. This study reveals about extraction of cellulose from pine needles, its cationization and finding its suitability for its application as strength additive in paper making. Chemical analysis of pine needles shows the presence of 47% α-cellulose, 20% hemicellulose, 37% lignin and 70% holocellulose. High holocellulose content showed its suitability as a novel source for cellulose extraction and its chemical modifications. Upto 50% α-cellulose was extracted from the needles and reaction parameters were optimized for the cationization. Application of highly substituted product (degree of substitution0.53) were evaluated as strength additive for paper making furnish. An enhancement up to 3.86%, 17%, and 0.8% in tear, tensile and burst index respectively was achieved by the application of cationized pine needle cellulose. The results of the study clearly shows the capability of Cationized pine needle cellulose as a strength additive in paper making.