Natural aluminosilicate raw material for production of mullite-silica fiber materials

Refractories ◽  
1991 ◽  
Vol 32 (7-8) ◽  
pp. 362-364
Author(s):  
I. G. Subochev ◽  
N. V. Pitak ◽  
I. V. Eremina
Keyword(s):  
Raw Material ◽  
Silica Fiber ◽  
Natural Aluminosilicate ◽  
Fiber Materials

Effect of wood acidity and catalyst on UF resin gel time

Holzforschung ◽  
2004 ◽  
Vol 58 (4) ◽  
pp. 408-412 ◽  
Author(s):  
C. Xing ◽  
S.Y. Zhang ◽  
J. Deng
Keyword(s):  
Ph Value ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Acid Catalyst ◽  
Buffering Capacity ◽  
Raw Material ◽  
Gel Time ◽  
Uf Resin ◽  
Effects Of Ph ◽  
Fiber Materials

Abstract Knowledge of pH and buffering capacity of raw fiber materials is important for understanding the effects of raw material on the curing rate of urea formaldehyde (UF) resin, used for panel manufacturing, especially with some less-desirable wood materials such as bark, top, and commercial thinnings. The effects of pH and buffering capacity as well as catalyst content on the gel time of UF resin were investigated. The results obtained from this study indicate that bark has a lower pH value as well as higher acid and alkaline buffering capacities than wood of the same species due to their extractives. The pH values of the raw fiber materials studied decrease with increased absolute and relative acid buffering capacity due to the increased absolute acidity mass in the solution. At lower levels of added catalyst, the effect of raw material pH on UF resin gel time is significant, while it is insignificant at higher catalyst contents. This may be due to the acidity of wood, which is the main acid catalyst source of the mixture at lower levels of added catalyst, while at higher levels, catalyst is the main source. With higher catalyst contents, all studied raw materials mixed with UF resin result in a longer gel time than does UF resin alone.

scholarly journals STUDY ON THE GRINDING TIME DURATION IMPACT ON THE PROPERTIES OF PAPER FROM ALTERNATIVE RAW MATERIALS

2020 ◽  
Vol 2020 (3) ◽  
pp. 24-31
Author(s):  
Z Galimova ◽  
◽  
H Babakhanova ◽  
M Abdunazarov ◽  
I Ismoilov ◽  
...  
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Milling Process ◽  
Raw Material ◽  
Time Duration ◽  
Paper Production ◽  
Fiber Materials ◽  
The Impact

Both raw and recycled fiber materials are used for paper production. The increase in percentage use of the latter is due to their paper-forming properties, availability and low cost. The article explores the possibility of using pulp from the inner layer of mulberry twig bark. Mulberry twigs, after removing leaves, which are the main raw material in silk production, have no practical industrial application. Recycling waste - mulberry branches - for the production of pulp is therefore relevant as it is aimed at solving raw material and environmental problems. The purpose of this work is to use local raw materials for paper production, study the impact of processing method of the grinding process on paper forming properties. During grinding the mechanical processes of changes of fibers determine mainly structure of a paper sheet, and colloidal-physical processes - bind and ability of fibers to form strong, homogenous and smooth structure of paper. The structure of the sheet of paper facilitates excessive or "selective" ink absorption into the pores of the paper and thus predetermines the quality of reproduction during the printing process. Methods for determining the physical and mechanical properties of papers were used in this work, and changes in the surface structure of samples cast at various technological modes of the milling process were studied. The results of the study revealed that the addition of cellulose mass from the inner layer of mulberry twig bark helps to obtain a strong paper. The optical properties of the paper, which contains cotton and cellulose from the inner layer of mulberry branch bark, are explained by the whiteness of the added fibers themselves. The strength properties of the paper at a weight grinding degree of 300 CWR are explained by the bond between the split and strongly interwoven fibers of the cellulose fibers. It has been established that the addition of more than 30% cellulose from the inner layer of the mulberry branch bark to the paper pulp mass is undesirable, as this adversely affects the whiteness of the paper

Effect of enzymatic hydrolysis lignin on the mechanical strength and hydrophobic properties of molded fiber materials

Holzforschung ◽  
2020 ◽  
Vol 74 (5) ◽  
pp. 469-475
Author(s):  
Yinling Zhao ◽  
Shengling Xiao ◽  
Jinquan Yue ◽  
Dingyuan Zheng ◽  
Liping Cai
Keyword(s):  
Tensile Strength ◽  
Enzymatic Hydrolysis ◽  
Raw Material ◽  
Hydrolysis Lignin ◽  
Hydrophobic Properties ◽  
Experimental Conditions ◽  
Water Contact ◽  
Carbohydrate Degradation ◽  
Molecular Substances ◽  
Fiber Materials

AbstractIn this study, poplar chemi-mechanical pulp was used as a raw material to investigate the effect of enzymatic hydrolysis lignin (EHL) content on the tensile strength and hydrophobicity of molded fiber materials (MFMs). The tensile strength and hydrophobic properties of the fabricated MFMs with different EHL contents were evaluated, and changes in their microstructure, chemical structure, and thermal stability were characterized via scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric (TG) analysis, respectively. Results show that under the experimental conditions used herein, the addition of EHL could increase the tensile strength and surface water contact angle of MFMs up to 20.3 MPa and 95.0°, respectively. The SEM observations indicate that the addition of EHL expanded the contact area between the EHL and fibers, thereby reducing the holes between fibers. The FTIR and TG analyses indicated that hot-pressing degraded EHL to form small molecular substances and improved the reaction with aldehydes produced via carbohydrate degradation, improving both the inter-fiber bonding strength and hydrophobicity of the MFM surface.

The optical properties of (PbS)n cluster structures on the silica fiber materials

2013 ◽  
Author(s):  
Yanhua Dong ◽  
Jianxiang Wen ◽  
Long Li ◽  
Fufei Pang ◽  
Zhenyi Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silica Fiber ◽  
Fiber Materials

scholarly journals Fluorescence properties and energy level structure of Ce-doped silica fiber materials

2017 ◽  
Vol 7 (3) ◽  
pp. 751 ◽  
Author(s):  
Xinxin Sun ◽  
Jianxiang Wen ◽  
Qiang Guo ◽  
Fufei Pang ◽  
Zhenyi Chen ◽  
...  
Keyword(s):  
Energy Level ◽  
Level Structure ◽  
Silica Fiber ◽  
Fluorescence Properties ◽  
Energy Level Structure ◽  
Fiber Materials

scholarly journals PEMBUATAN HARDBOARD DARI SERAT ALTERNATIF MENGGUNAKAN LIGNIN ALAMINYA DAN TANIN FORMALDEHIDA SEBAGAI PEREKAT

2015 ◽  
Vol 5 (01) ◽  
Author(s):  
Dian Anggraini Indrawan ◽  
Han Roliadi ◽  
Rossi Margareth Tampubolon ◽  
Mohamad Iqbal ◽  
Lisna Efiyanti
Keyword(s):  
Natural Resources ◽  
Strength Properties ◽  
Raw Material ◽  
Forming Process ◽  
Physical Strength ◽  
Medium Scale ◽  
Wet Process ◽  
Alkali Consumption ◽  
Fiber Materials ◽  
High Alkali

The most numerous uses of hardboard are for sound-deadening barrier, insulation wall, furniture, part of electronic appliances, and vehicle interior.Nowadays, in Indonesia the availability of natural-forest woods (the conventional ligno-cellulosic fibrous raw material) for fiberboard manufacture becomes limited and scarce. Thus, non-wood alternative fibers should be considered as raw material for fiber board. In this study, experiment was done using alternative fibers which were Saccharum spontaneum grasses (SSG), empty oil-palm bunches (EOPB), and bamboo. The pulping and mat forming employed consecutively an open-hot soda semi-chemical process and wet-forming process. The additives for hardboard forming comprised wax emulsion and tannin formaldehyde (TF) adhesive.Alkali consumption in the pulping of alternative fibers (SSG, EOPB, and bamboo) for hardboard ranged about 88-99% (regarded as quite high, near 100%). SSG was the most prospective for hardboard, followed by consecutively EOPB and bamboo. Also, physical-strength properties of hardboard from SSG satisfied the JIS and ISO requirement the most. The prospective results of fiberboard manufacture from the alternative fiber materials will expectedly lessen the dependency on naturalforest woods thereby sustaining the natural resources, and alleviating environment concerns. The high alkali consumption and wet-forming implementation hinted that this fiberboard-manufacturing experiment is more suitable for small-medium scale endeavor (SME). Keywords: hardboard, alternative ligno-cellulosic fiber materials, prospective results, sustaining natural resources, small-to-medium scale endeavor (SME)ABSTRAKHardboard banyak digunakan antara lain untuk bahan peredam suara, dinding penyekat, mebel, bagian dari peralatan elektronik dan interior kendaraan. Di Indonesia, ketersediaan kayu hutan alam (bahan baku serat berligno-selulosa konvensional) untuk pembuatan papan serat di Indonesia semakin terbatas dan langka. Oleh karena itu bahan serat alternatif harus dipertimbangkan sebagai bahan baku papan serat. Dalam penelitian ini dilakukan percobaan pembuatan papan serat (hardboard) dari bahan serat alternatif, yaitu rumput gelagah (RG), tandan kosong kelapa sawit (TKKS) dan bambu. Pengolahan pulp (pulping) dan pembentukan lembaran untuk papan serat menggunakan proses semi-kimia soda panas terbuka dengan pembentukan cara basah (wet process). Bahan aditif yang digunakan adalah emulsi lilin dan perekat tanin formaldehida (TF) Konsumsi alkali pada pulping adalah 88-99% (dianggap cukup tinggi, mendekati 100%). RG paling berprospek untuk hardboard diikuti oleh TKKS dan bambu, dan sifat fisik-kekuatan hardboard dari RG paling banyak memenuhi persyaratan JIS dan ISO. Hasil prospektif pemanfaatan serat alternatif untuk papan serat diharapkan bermanfaat mengurangi ketergantungan pada kayu hutan alam sehingga ikut melestarikan sumber daya alam. Tingginya konsumsi alkali dan penerapan cara basah berindikasi bahwa pengolahan papan serat ini lebih sesuai untuk usaha kecil menengah (UKM).Kata kunci: hardboard, bahan baku serat alternatif, hasil prospektif, melestarikan sumber daya alam, usaha kecil menengah (UKM)

The optical properties of (PbS)n cluster structures on the silica fiber materials

2013 ◽  
Author(s):  
Yanhua Dong ◽  
Jianxiang Wen ◽  
Long Li ◽  
Fufei Pang ◽  
Zhenyi Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silica Fiber ◽  
Fiber Materials

One-Pot Preparation of Silica Fibers from Rice Straw for Efficiency Removal of Heavy Metal Ions

2019 ◽  
Vol 953 ◽  
pp. 191-197
Author(s):  
Shou Zhu Li ◽  
Ying Li ◽  
Kai Zhang ◽  
Li Yao
Keyword(s):  
Rice Straw ◽  
Active Site ◽  
Active Sites ◽  
Agricultural Waste ◽  
Silica Fiber ◽  
One Pot ◽  
Calcination Process ◽  
Silica Fibers ◽  
Equilibrium Adsorption Capacity ◽  
Fiber Materials

Silica fibers were prepared from the agricultural waste-rice straw via a slow calcination process. A possible formation mechanism of the obtained silica fiber was explained. The phytoliths/vascular composite fibers of rice straw work as the structural directing templates for the formation of silica fibers under the slow calcination process. Owing to the potassium silicate active site, the separable silica fiber showed great capability in removal of Cu2+, Ni2+, Cd2+ and Pb2+ from aqueous solution with efficiency higher than 99%. Additionally, over 90% of equilibrium adsorption capacity can be reached within 10 minutes, showing the easily accessible paths and active sites for ion transportation and adsorption in the as-prepared fiber. These results of this work are beneficial for scientists pursuing new synthetic route for valuable and widely applicable silica fiber materials from the agricultural waste, also helping to solve disposal of the agricultural waste and pollution problems.

scholarly journals USE OF BASALT IN REPAIR AND RESTORATION OF WATER SUPPLY AND SEWERAGE

2021 ◽  
pp. 36-42
Author(s):  
D. HONCHARENKO ◽  
P. HULIEVSKYI
Keyword(s):  
Water Supply ◽  
Glass Fibers ◽  
Large Diameter ◽  
Basalt Fiber ◽  
Raw Material ◽  
Resource Base ◽  
Efficient Operation ◽  
Reliable Performance ◽  
Fiber Materials ◽  
State Of The Environment

Problem statement. The most expensive and vulnerable part of the city's engineering infrastructure are pipeline systems that divert wastewater from the settlement. The state of the environment, the efficient operation of the city's enterprises, and the comfort of the citizens living directly depend on their uninterrupted operation and the level of reliability. Thus, the primary task of utilities is to ensure the reliable performance of sewer networks. When repairing and restoring large-diameter sewer pipelines that transport wastewater by gravity, the actual task is the choice of materials that will improve the reliability and service life of drainage systems. At present, the requirements for composites have increased, especially in terms of their heat and chemical resistance, resistance to the action of microorganisms, groundwater and wastewater. One of the most effective options that meets the listed criteria is the use of materials based on basalt. The purpose of the article is to analyze the use of basalt in the repair and restoration of water supply and sewerage networks. Results. The article analyzes the mineral resource base of rocks as a one-component raw material for the manufacture of basalt fiber materials and composites based on them. The importance of the organization of production of basalt fiber materials and the prospects of their use to solve the economic problems of Ukraine: construction, utilities. The analysis of the properties of basalt continuous fibers in comparison with glass fibers of type E and S, carbon and aramid fibers is carried out. It is determined that basalt fiber materials, composites and products based on them are promising for use in the repair and restoration of water supply and sewerage networks.

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