[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-141956-en":3,"doc-seo-141956-105":30,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},141956,8796095461564,"Liam","https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d",7,"Healthcare","Synthesis of Silica from Rice Husk Waste for Hydrophobic Material as an Anti-Water Coating for Eyeglasses","Hydrophobic silica-based coatings for glasses were synthesized from rice husk ash using the sol-gel method, incorporating PDMS as a hydrophobic component. Silica compositions were varied at 0.5, 1.0, 1.5, and 2.0 g while PDMS was kept constant at 20 g. Rice-husk ash raw material was characterized by XRF for elemental composition, and the produced silica and composites were evaluated by FTIR, PSA, and water contact angle (WCA) to assess functional groups, particle size, and hydrophobicity. Contact angle results exceeded 90°, with maximum hydrophobicity achieved for PDMS/SiO2 at ~111.40° using 2 g silica.","JFA (JURNAL FISIKA DAN APLIKASINYA) VOLUME 19, NUMBER 2, JUNE 2023  \nSynthesis of Silica from Rice Husk Waste for Hydrophobic Material as an Anti-Water Coating for  \nEyeglasses  \nPhahul Zhemas Zul Nehan, 1 Ahmad Ali Akbar, 1 Muhammad Ilham  \nNur Karim, 1 Raychan Abyqa Fahriza, 1 and Mochamad Zainuri* 1  \n1 Department of Physics, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Sukolilo, Surabaya, 60111, Indonesia.  \nAbstract: Hydrophobic materials made of silica as a coating for glasses are very attractive. The synthesis of silica (SiO2 ) from rice husk ash was successfully carried out using the sol-gel method. The hydrophobic silica composition is made with four variations of silica, consisting of 0.5, 1.0, 1.5, 2.0 g and polydimethylsiloxane (PDMS) keep constant in 20 g. The raw material was first characterized by X-ray Fluorescence (XRF) to investigate element composition. Then, silica powder obtained from rice husk ash was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Particle Size Analyzer (PSA) and Water Contac Angel (WCA) were employed to investigate functional groups material, size of particles and hydrophobicity of the prepared samples for coating glass. The result of contact angel from coating glass exhibited more than 90􀀎 and the maximum hydrophobicity properties of polydimethylsiloxane/silica (PDMS/SiO2 ) was about 111 .40􀀎 for the silica composition of 2 g.  \nKeywords: Hydrophobic, Polydimethylsiloxane, Rice Husk Ash, Silica  \n*Corresponding author: [zainuri@physics.its.ac.id](zainuri@physics.its.ac.id)  \nArticle history: Received 19 January 2023, Accepted 21 June 2023, Published June 2023 .  \n[http://dx.doi.org/10.12962/j24604682.v19i2.15721](http://dx.doi.org/10.12962/j24604682.v19i2.15721)  \n[2460-4682](2460-4682) ©[Departemen Fisika](Departemen Fisika), [FSAD-ITS](FSAD-ITS)  \nI. INTRODUCTION  \nThe basic surface properties of glass materials are hydrophilic, making it easy for rainwater and dew to stick to the surface. This causes problems for glasses because the sticking water causes fungi to grow on the surface, frosting, sticking dirt, dust, and so on. This reduces the transparency of the glass over time and does not function optimally. Therefore, the ability to resist water (waterproof) on the surface of the glass is crucial and considered, especially in maintaining function and increasing resistance in glasses. One way that is currently possible is to coat using hydrophobic materials.  \nThe advantage of this hydrophobic property is that it is waterproof, always looks clean, reduces fluid on the surface, reduces fluid friction with the surface, and is non-polar property. When applied to glass, it will have a self-cleaning feature [1] . From several studies that have been carried out, one of the most abundant materials in Indonesia is rice husk. Rice husk is a hard layer that covers the kernel, consisting of interlocking lemma and palea, commonly found in rice milling areas. The husk is typically obtained at 20􀀆 30%, bran at 8􀀆 12%, and milled rice at 50􀀆 64% of the initial weight of paddy during the milling process. In addition, the husk has a bulk density of 125 kg/m3 , with a caloric value of 1 kg of rice husk at 3300 kilocalories [2] . In 2018, the rice harvest was around 6 .05 million tons of rice with a total of approximately 1.27 million tons of rice husk. Based on these results, the potential for the utilization of rice husks is very large. In terms of economic  \naspects, the price of rice husk is not as expensive as other materials such as TiO2 , a material for ceramic nano-coating which is more expensive. Silicon dioxide or silica from rice husk has some advantages so it is still comparable with some of its competitors. If the correct washing is carried out, the silica content can reach up to 99%[3] . One of the criteria for good hydrophobic material is a high-water contact angle with its surface (>90􀀎 ) . The contact angle obtained using silica (SiO2 ) de","cbCaihGTG54W8Dhg","https://ap.wps.com/l/cbCaihGTG54W8Dhg","pdf",6208312,1,5,"English","en",105,"# Abstract\n# Introduction\n# Method\n## Materials\n## Characterization","[{\"question\":\"How was the silica obtained from rice husk waste for the coating material?\",\"answer\":\"Silica (SiO2) was synthesized from rice husk ash using the sol-gel method, then combined with PDMS to form hydrophobic coatings for glasses.\"},{\"question\":\"Which characterization methods were used to evaluate the samples?\",\"answer\":\"XRF was used to analyze elemental composition of the raw material, while FTIR and PSA were used to study functional groups and particle size; water contact angle (WCA) was used to measure hydrophobicity.\"},{\"question\":\"What silica composition produced the highest hydrophobicity on coated eyeglasses?\",\"answer\":\"The maximum hydrophobicity was obtained for PDMS/SiO2 with a silica composition of 2 g, reaching about 111.40° contact angle.\"}]","Synthesis of Silica from Rice Husk Waste for Hydrophobic Material as an Anti-Water Coating for Eyeglasses | PDF",1787672255,13,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":28},"synthesis-of-silica-from-rice-husk-waste-for-hydrophobic-material-as-an-anti-water-coating-for-eyeglasses","",{"@graph":36,"@context":85},[37,54,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/healthcare/",3,{"item":52,"name":13,"@type":43,"position":53},"https://docshare.wps.com/document/synthesis-of-silica-from-rice-husk-waste-for-hydrophobic-material-as-an-anti-water-coating-for-eyeglasses/141956/",4,{"url":52,"name":13,"@type":55,"author":56,"headline":13,"publisher":58,"fileFormat":61,"inLanguage":23,"description":14,"dateModified":62,"datePublished":62,"encodingFormat":61,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":57},"Person",{"url":41,"name":59,"@type":60},"DocShare","Organization","application/pdf","2026-08-25",true,{"@type":65,"interactionType":66,"userInteractionCount":4},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"How was the silica obtained from rice husk waste for the coating material?","Question",{"text":75,"@type":76},"Silica (SiO2) was synthesized from rice husk ash using the sol-gel method, then combined with PDMS to form hydrophobic coatings for glasses.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"Which characterization methods were used to evaluate the samples?",{"text":80,"@type":76},"XRF was used to analyze elemental composition of the raw material, while FTIR and PSA were used to study functional groups and particle size; water contact angle (WCA) was used to measure hydrophobicity.",{"name":82,"@type":73,"acceptedAnswer":83},"What silica composition produced the highest hydrophobicity on coated eyeglasses?",{"text":84,"@type":76},"The maximum hydrophobicity was obtained for PDMS/SiO2 with a silica composition of 2 g, reaching about 111.40° contact angle.","https://schema.org",{"og:url":52,"og:type":87,"og:title":13,"og:site_name":59,"og:description":14},"article",{"robots":89,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":92},[93,97,101,105,109,114,117,122,127,130,134],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":94,"show_sort_weight":95,"slug":96},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":98,"show_sort_weight":99,"slug":100},"Literature",80,"literature",{"id":53,"doc_module":4,"doc_module_name":46,"category_name":102,"show_sort_weight":103,"slug":104},"Exam",70,"exam",{"id":21,"doc_module":4,"doc_module_name":46,"category_name":106,"show_sort_weight":107,"slug":108},"Comic",60,"comic",{"id":110,"doc_module":4,"doc_module_name":46,"category_name":111,"show_sort_weight":112,"slug":113},6,"Technology",50,"technology",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":115,"slug":116},40,"healthcare",{"id":118,"doc_module":4,"doc_module_name":46,"category_name":119,"show_sort_weight":120,"slug":121},8,"Research & Report",30,"research-report",{"id":123,"doc_module":4,"doc_module_name":46,"category_name":124,"show_sort_weight":125,"slug":126},9,"Religion & Spirituality",20,"religion-spirituality",{"id":125,"doc_module":4,"doc_module_name":46,"category_name":128,"show_sort_weight":125,"slug":129},"World Cup","world-cup",{"id":131,"doc_module":4,"doc_module_name":46,"category_name":132,"show_sort_weight":131,"slug":133},10,"Lifestyle","lifestyle",{"id":135,"doc_module":4,"doc_module_name":46,"category_name":136,"show_sort_weight":21,"slug":137},19,"General","general"]