Saamaynta hawo-mareenka ee ether cellulose

Ether-ka Cellulose waa polymers synthetic oo laga sameeyay cellulose dabiici ah oo kiimiko ahaan wax laga beddelay. Cellulose ether waa nooc ka mid ah cellulose dabiiciga ah. Si ka duwan polymers synthetic, wax soo saarka ether cellulose wuxuu ku salaysan yahay cellulose, maadada ugu aasaasiga ah, ka samaysan polymer dabiici ah. Sababtoo ah gaar ahaan qaab dhismeedka cellulose dabiiciga ah, cellulose lafteedu ma laha awood ay ku falceliyaan wakiilada etherizing. Si kastaba ha ahaatee, ka dib daawaynta solubilizers, bonds hydrogen xoog u dhexeeya iyo gudahood silsiladaha kelli waa la burburiyaa, iyo kooxda hydroxyl waxaa lagu sii daayay galay cellulose alkali oo awood u leh inay ka falcelin, iyo ka dib falcelinta wakiilka etherizing kooxda OH loo beddelo koox OR si ay u helaan ether cellulose.

Ether-yada Cellulose waxay leeyihiin saamayn hawo-marineed oo cad oo ku saabsan walxaha sibidhka ee cusub ee la isku daray. Ethers Cellulose waxay leeyihiin labadaba hydrophilic (hydroxyl, ether) iyo hydrophobic (methyl, giraanta gulukooska) kooxaha waxayna yihiin surfactants leh dhaqdhaqaaq dusha sare ah sidaas darteed waxay leeyihiin saameyn hawo-mareen ah. Saamaynta hawo-mareenka ah ee ether cellulose waxay soo saari doontaa saamaynta "kubadda", taas oo hagaajin karta waxqabadka shaqada ee walxaha cusub, sida kordhinta caagagga iyo jilicsanaanta hoobiye inta lagu jiro hawlgalka, taas oo faa'iido u leh faafinta hoobiye; waxay sidoo kale wanaajin doontaa dhalidda hoobiye waxayna yareyn doontaa qiimaha wax soo saarka hoobiye; si kastaba ha ahaatee, waxay kordhin doontaa porosity ee walxaha adag waxayna yaraynaysaa xooggeeda iyo moduleska laastikada, iwm. Qalabka farsamada.

Sida surfactant ah, ether cellulose sidoo kale waxay leedahay saamayn qoynta ama saliidayn on qaybaha sibidhka, taas oo ay weheliso saamaynta hawo-entraining kordhinaysaa dareere ah alaabta cementitious, laakiin saamaynta dhumucdiisuna waxay yaraynaysaa dareeraha, iyo saamaynta ether cellulose on dareeraha alaabta cementitious waa isku darka caag ah iyo saamaynta dhumuc. Guud ahaan marka la eego, marka qadarka etherka cellulose uu aad u hooseeyo, waxay inta badan muujisaa saameynta balaastikada ama yaraynta biyaha; marka qadarku sarreeyo, saamaynta dhumucda ether-ka cellulose ayaa si degdeg ah u kordheysa, saameynteeda hawo-mareenka waxay u egtahay in ay dheregto, sidaas darteed waxay muujinaysaa saameynta dhumucda ama waxay kordhisaa baahida biyaha.