气相接枝棕榈酰氯制备耐热水PVOH涂层纸的研究(II)——无机颜料涂层对棕榈酰氯渗透的控制

IF 0.9 4区 农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD Nordic Pulp & Paper Research Journal Pub Date : 2023-01-10 DOI:10.1515/npprj-2022-0069
K. Lee, J. Choi, Kyoung-Hwa Choi, Jeong-yong Ryu
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引用次数: 0

摘要

摘要在本实验中,我们探讨了如何控制棕榈酰氯在PVOH涂布纸气体接枝中的渗透。当碳酸钙被预涂布时,PVOH涂布纸的气体接枝反应倾向于被抑制。据信,当碳酸钙中和接枝反应的副产物盐酸气体时产生的水分会额外消耗棕榈酰氯,从而通过产生未反应的残余游离脂肪酸来抑制接枝反应并降低疏水化效率。与碳酸钙不同,粘土涂层阻挡了蒸发的棕榈酰氯的渗透,并在不产生水分的情况下提高了PVOH的气体接枝密度。蒸发的棕榈酰氯渗透的PVOH涂层被薄处理以避免在厚度方向上不必要的接枝反应,并且棕榈酰氯在气相中的传播被粘土涂层阻挡。在之前的研究中,需要超过1400 mg/m2的棕榈酰氯来确保小于10 g/m2的Cobb热水吸收的强疏水性。然而,通过预涂粘土,只有650mg/m2的棕榈酰氯(与之前的研究相比减少了约53%)足以进行强疏水处理。
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Study on manufacturing hot water-resistant PVOH coated paper by gas grafting palmitoyl chloride (II)–Control of palmitoyl chloride penetration by inorganic pigments coating
Abstract In this experiment, we explored how to control the penetration of palmitoyl chloride in the gas grafting of PVOH-coated paper. When calcium carbonate was pre-coated, the gas grafting reaction of the PVOH-coated paper tended to be inhibited. It is believed that palmitoyl chloride is additionally consumed by moisture generated when calcium carbonate neutralizes hydrochloric acid gas, a by-product of the graft reaction, thereby inhibiting the graft reaction and reducing the hydrophobization efficiency by generating unreacted residual free fatty acids. Unlike calcium carbonate, the clay coating layer blocks the penetration of vaporized palmitoyl chloride and improves the gas grafting density of PVOH without moisture generation. The PVOH coating layer, where vaporized palmitoyl chloride penetrates, is thinly processed to avoid unnecessary graft reactions in the thickness direction, and the propagation of palmitoyl chloride in the gas phase is blocked by the clay-coating layer. In previous studies, an excess of 1400 mg/m2 of palmitoyl chloride was required to secure strong hydrophobicity of less than 10 g/m2 of Cobb hot water absorption. However, by pre-coating the clay, only 650 mg/m2 of palmitoyl chloride, which was about a 53% reduction compared to previous studies, was sufficient to perform a strong hydrophobic treatment.
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来源期刊
Nordic Pulp & Paper Research Journal
Nordic Pulp & Paper Research Journal 工程技术-材料科学:纸与木材
CiteScore
2.50
自引率
16.70%
发文量
62
审稿时长
1 months
期刊介绍: Nordic Pulp & Paper Research Journal (NPPRJ) is a peer-reviewed, international scientific journal covering to-date science and technology research in the areas of wood-based biomass: Pulp and paper: products and processes Wood constituents: characterization and nanotechnologies Bio-refining, recovery and energy issues Utilization of side-streams from pulping processes Novel fibre-based, sustainable and smart materials. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes. Topics Cutting-edge topics such as, but not limited to, the following: Biorefining, energy issues Wood fibre characterization and nanotechnology Side-streams and new products from wood pulping processes Mechanical pulping Chemical pulping, recovery and bleaching Paper technology Paper chemistry and physics Coating Paper-ink-interactions Recycling Environmental issues.
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