تقویت ریزساختار کامپوزیت چوب گچ با کربنات کلسیم اصلاح‌شده، سولفانات و نشاسته به‌منظور کاهش جذب آب و افزایش مقاومت مکانیکی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه صنایع چوب و کاغذ، دانشکدة منابع طبیعی، دانشگاه زابل، زابل، ایران.

2 گروه مهندسی عمران-سازه، دانشکدة فنی و مهندسی، دانشگاه زابل، زابل، ایران.

10.22059/jfwp.2024.367884.1267

چکیده

این تحقیق جهت سبک‌سازی، مقاوم‌سازی چوب گچ به‌همراه کم‌کردن تمایل آن به جذب آب انجام ‌شده است. بدین‌منظور، ابتدا اثر متغیر الیاف رنگبری نشده و سپس اثر متغیرهای کربنات کلسیم اصلاح‌شده با اسید استئاریک، لیگنوسولفانات، پلی‌ونیل الکل، نشاستة ذرت و تاپیوکا بر روی مقاومت خمشی نمونه­ ها بررسی شد. این مواد افزودنی در سطوح مختلف به گچ اضافه شد تا مقدار بهینه جهت بهبود خصوصیات تخته گچ از جمله مقاومت خمشی با آزمون و خطا به‌دست آید. مقاومت فشاری، جذب آب، چگالی و ریز ساختار نمونه­ های تیمارهای بهینه بررسی شد. نتایج نشان داد اسید استئاریک، یک‌لایة پوششی بر ذرات کربنات کلسیم ایجاد و دسترسی رطوبت را تا حدود 1/1 برابر در الیاف رنگبری نشده نسبت به نمونه ­های شاهد به حداقل ­می­رساند. مقاومت فشاری در کلیة تیمارهای خمیر رنگبری نشده نسبت به نمونه ­های شاهد افزایش داشت و این افزایش در نشاسته تاپیوکا مشهودتر بود و نسبت به نمونه­ های شاهد 2/3 برابر شد. در نهایت، تصاویر میکروسکوپ الکترونی توزیع یکنواخت الیاف و بلورهای گچ و در نتیجه بافت همگن و اتصال مناسب بین آن‌ها را نشان داد. حتی با توجه به اینکه نمونه ­های تیمارهای بهینه در رده چگالی کم (0/74 گرم بر سانتی‌متر مکعب) قرار گرفتند، ولی مقاومت فشاری بیشتری نسبت به حداقل مقدار استاندارد داشتند. تخته گچ­ های تولید شده دارای حداقل مقاومت استاندارد و جذب آب مناسبی می ­باشند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Reinforcement of the microstructure of gypsum board composite with modified calcium carbonate, sulfonate, and starch to reduce water absorption and increase mechanical strength

نویسندگان [English]

  • Sydeh Rahil Chalak 1
  • Saeedreza Farrokh Payam 1
  • Ali Bayatkashkoli 1
  • Hosseinali Rahdar 2
1 Department of Wood and Paper Industries, Faculty of Natural Resources, University of Zabol, Zabol Iran.
2 Department of Civil-Structural Engineering, Faculty of Technical and Engineering, University of Zabol, Zabol, Iran.
چکیده [English]

This research was conducted to enhance the strength and reduce the water absorption of gypsum board. Initially, the effect of unbleached fiber was examined, followed by an investigation into the impact of calcium carbonate modified with stearic acid, lignosulfonate, polyvinyl alcohol, corn starch, and tapioca on the flexural strength of the samples. These additives were incorporated into the plaster at varying levels to determine the most effective amount for improving the properties of the gypsum board, including bending strength, through trial and error. The compressive strength, water absorption, density, and microstructure of samples from optimal treatments were analyzed. The results revealed that stearic acid formed a coating layer on the calcium carbonate particles, reducing moisture absorption to approximately 1.1 times that of untreated fibers compared to the control samples. Furthermore, the compressive strength increased in all treatments with unbleached pulp compared to the control samples, with tapioca starch showing the most significant increase at 2.3 times that of the control samples. Electron microscope images displayed a uniform distribution of gypsum fibers and crystals, resulting in a homogeneous texture and proper connection between them. Despite falling into the low-density category (0.74 g/cm3), the optimal treatment samples exhibited higher compressive strength than the minimum standard value. The produced gypsum boards demonstrated standard resistance and appropriate water absorption.

کلیدواژه‌ها [English]

  • Compression strength
  • Gypsum board
  • Ligno sulfanate Mecroscopic texture
[1]   Mihajlovic, S.R., Vucinic, D.R., Sekulic, Z.T., Milicevic, S.Z. & Kolonja, B.M. (2013). Mechanism of stearic acid adsorption to calcite. Powder Technology, 16: 208-245.
[2]   Jeon, C.W., Park, S., Bang, J.H., Chae, S., Song, K., & Lee, S.W. (2018). Nonpolar surface modification using fatty acids and its effect on calcite from mineral carbonation of desulfurized gypsum. Coatings, 8(1), 1-13.
[3]   Maraveas, C. (2020). Production of sustainable construction materials using agro-wastes. Materials, 13(2): 1-29.
[4]   Gutierrez-Gonzalez, S., Gadea, J., Rodriguez, A., Blanco-Varela, M., & Calderon, V. (2012). Compatibility between gypsum and polyamide powder waste to produce lightweight plaster with enhanced thermal properties. Construction and Building Materials, 34: 179-185.
[5]   del Rio Merino, M., Saez, P.V., Longobardi, I., Astorqui, J.S.C., & Porras-Amores, C. (2019). Redesigning lightweight gypsum with mixes of polystyrene waste from construction and demolition waste. Journal of Cleaner Production, 51: 144-220.
[6] Dolezelova, M., Scheinherrova, L., Krejsova, J., Keppert, M., Cerny, R., & Vimmrova, A. (2021). Investigation of gypsum composites with different lightweight fillers. Construction and Building Materials, 297: 1-14.
[7] Guna, V., Yadav, C., Maithri, B., Ilangovan, M., Touchaleaume, F., & Saulnier, B. (2021). Wool and coir fiber reinforced gypsum ceiling tiles with enhanced stability and acoustic and thermal resistance. Journal of Building Engineering, 41: 1-9.
[8] Başpınar, M.S., & Kahraman, E. (2011). Modifications in the properties of gypsum construction element via addition of expanded macroporous silica granules. Construction and Building Materials, 25(8): 3327-3333.
[9] Kuqo, A., & Mai, C. (2021). Mechanical properties of lightweight gypsum composites comprised of seagrass Posidonia oceanica and pine [Pinus sylvestris] wood fibers. Construction and Building Materials, 282: 1-9.
[10] Hosseinkhani, H. (2015). Gypsum bounded board production reinfoced with Date Palm Phoenix dactylifera L. pruning residues fibers. Iranian Journal of Wood and Paper Science Research, 30(1): 60-71. (In Persian).
[11] Hamza, S., Saad, H., Charrier, B., & Ayed, N. (2013). Charrier-El Bouhtoury F. Physico-chemical characterization of Tunisian plant fibers and its utilization as reinforcement for plaster based composites. Industrial Crops and Products, 49: 357-365.
[12] Heryanto, R., Hasan, M., Abdullah, E.C., & Kumoro, A.C. (2007). Solubility of stearic acid in various organic solvents and its prediction using non-ideal solution models. Science Asia, 33: 469-472.
[13] Rostamian, F., Etesami, N., & Haghgoo, M. (2022). Control of Electronic board temperature using heat sink containing stearic acid as a phase change material. Journal of Mechanical Engineering, 51(4): 433-441.
[14] Rocha, C., Neto, R.L., Goncalves, V.S., Carvalho, L., & Filho, F. (2003). An investigation of the use of stearic acid as a process control agent in high energy ball milling of Nb-Al and Ni-Al powder mixtures. Materials Science Forum, 120, 144-149.
[15] Al-Busaidi, I.K., Al-Maamari, R.S., Karimi, M., & Naser, J. (2019). Effect of different polar organic compounds on wettability of calcite surfaces. Journal of Petroleum Science and Engineering, 180: 569-583.
[16] Wu, Q., Guo, W., You, S., Bao, X., Luo, H., Wang, H., & Ren, N. (2019). Concentrating lactate-carbon flow on medium chain carboxylic acids production by hydrogen supply. Bioresource Technology, 291: 1-39.
[17] Zurcher, S., & Graule, T. (2005). Influence of dispersant structure on the rheological properties of highly-concentrated zirconia dispersions. Journal of the European Ceramic Society, 25(6): 863-873.
[18] Cheng, L., & Shi, S.b. (2019). Yang L, Zhang Y, Dolfing J, Sun Y-g, et al. Preferential degradation of long-chain alkyl substituted hydrocarbons in heavy oil under methanogenic conditions. Organic Geochemistry, 138: 1-11.
[19] Yogurtcuoglu, E., & Ucurum, M. (2011). Surface modification of calcite by wet-stirred ball milling and its properties. Powder Technology, 214(1): 47-53.
[20] Mason, W.R. (2009). Starch use in foods. Starch, pp. 745-795.
[21] Noorzad, R., & Tanegonbadi, B. (2020). Volume change behavior of stabilized expansive clay with lignosulfonate. Scientia Iranica, 27(4): 1762-1775. (In Persian)
[22] Liu, B., Zhang, J., & Guo, H. (2022). Research progress of polyvinyl alcohol water-resistant film materials. Membranes, 12(3): 1-10.
[23] Aslam, M., Kalyar, M.A., & Raza, Z.A. (2018). Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites. Polymer Engineering & Science, 58(12): 2119-2132.
[24] Guohua, Z., Ya, L., Cuilan, F., Min, Z., Caiqiong, Z., & Zongdao, C. (2006). Water resistance, mechanical properties and biodegradability of methylated-cornstarch/poly[vinyl alcohol] blend film. Polymer Degradation and Stability, 91(4): 703-711.
[25] Patti, A., Lecocq, H., Serghei, A., Acierno, D., & Cassagnau, P. (2021). The universal usefulness of stearic acid as surface modifier: applications to the polymer formulations and composite processing. Journal of Industrial and Engineering Chemistry, 96: 1-33.
[26] Aksogan, O., Resatoglu, R., & Binici, H. (2018). An environment friendly new insulation material involving waste newsprint papers reinforced by cane stalks. Journal of Building Engineering, 15: 33-40.
[27] Toro-Márquez, L.A., Merino, D., & Gutierrez, T.J. (2018). Bionanocomposite films prepared from corn starch with and without nanopackaged Jamaica [Hibiscus sabdariffa] flower extract. Food and Bioprocess Technology, 11: 1955-1973.
[28] Li, X., Xu, D.S., Li, M., Liu, L., & Heng, P. (2016). Preparation of co-spray dried cushioning agent containing stearic acid for protecting pellet coatings when compressed. Drug Development and Industrial Pharmacy, 42(5): 788-795.
[29] Gunasekaran, K., Annadurai, R., & Kumar, P. (2012). Long term study on compressive and bond strength of coconut shell aggregate concrete. Construction and Building Materials, 28(1): 208-2015.