Department of Chemistry, McGill University, 3420 University Street, Montreal, QC, H3A2A7 Canada.
Biomacromolecules. 2010 Apr 12;11(4):989-93. doi: 10.1021/bm9014667.
Polyhydroxyalkanoates (PHAs) are characterized by the chemistry of the biodegradable inclusions inside the microbial membrane. They are produced by a wide variety of bacteria, where they function as energy and carbon storage materials. This intracellular Bioplastic forms a stable latex suitable for surface treatments of paper such as sizing and coating. In this work, we compare native granules and artificial granules made from market poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-hydroxyvalerate), P(3HB-co-3HV), for their ability as sizing agent. Paper sizing was assayed by measuring the resistance of sized paper to penetration by aqueous fluids. Our results indicate that the sizing effect of PHAs is dependent on several factors, such as, paper drying temperature, drying time, pressure, and polymer composition, that is, homopolymer, random copolymer, and texture of granules. The sizing efficiency of the copolymer is generally poor compared to the PHB homopolymer. In addition to water permeability, the tensile strength of sized paper was measured and physical properties of granule suspensions were recorded using SEM microscopy, X-ray diffraction, and dynamic light scattering.
聚羟基烷酸酯（PHAs）的特点是微生物膜内可生物降解成分的化学性质。它们由各种各样的细菌产生，在这些细菌中，它们是作为能量和碳储存物质。这种细胞内的生物塑料形成了一种稳定的乳胶，适用于纸张的表面处理，如施胶和涂层。在这项工作中，我们比较了天然颗粒和由市售聚（3-羟基丁酸酯）（PHB）和聚（3-羟基丁酸酯-共-3-羟基戊酸酯），P（3HB-co-3HV）制成的人工颗粒，以研究它们作为施胶剂的能力。通过测量施胶纸对水基流体渗透的阻力来测定纸张施胶度。我们的结果表明，PHA 的施胶效果取决于几个因素，如纸张干燥温度、干燥时间、压力和聚合物组成，即均聚物、无规共聚物和颗粒的纹理。与 PHB 均聚物相比，共聚物的施胶效率通常较差。除了水渗透性之外，还测量了施胶纸的拉伸强度，并使用 SEM 显微镜、X 射线衍射和动态光散射记录了颗粒悬浮液的物理性质。
