Kala dirida ether-ka cellulose waxay noqon kartaa hannaan adag oo ay ugu wacan tahay qaab-dhismeedkooda kiimikaad ee gaarka ah iyo sifooyinka. Ethers-ka Cellulose waa polymers-biyood ku milma oo ka soo jeeda cellulose, polysaccharide si dabiici ah u soo baxa oo laga helo gidaarada unugyada dhirta. Waxaa si weyn loogu isticmaalaa warshadaha kala duwan sida dawooyinka, cuntada, dunta, iyo dhismaha ay sabab u tahay filim-samaynta aad u fiican, dhumucdiisuna, xidhitaan, iyo guryaha xasilinta.
1. Fahamka Ethers Cellulose:
Ether-yada Cellulose waa unugyo ka soo jeeda cellulose, halkaasoo kooxaha hydroxyl qayb ahaan ama si buuxda loogu beddelay kooxaha etherka. Noocyada ugu caansan waxaa ka mid ah methyl cellulose (MC), hydroxypropyl cellulose (HPC), hydroxyethyl cellulose (HEC), iyo carboxymethyl cellulose (CMC). Nooc kastaa wuxuu leeyahay sifooyin gaar ah iyadoo ku xiran heerka iyo nooca beddelka.
2. Waxyaalaha Saamayn kara milanka:
Dhowr arrimood ayaa saameeya milanka ethers cellulose:
Darajada Beddelka (DS): Sare DS guud ahaan waxay hagaajisaa milanka maadaama ay kordhiso biyo-baxa polymerka.
Miisaanka Molecular: Miisaanka unugyadu sareeyo ethers cellulose waxa laga yaabaa inay u baahdaan wakhti ama tamar badan si ay u milmaan.
Guryaha Solvent: Xalalka leh dabaylaha sare iyo awoodda isku xidhka hydrogen, sida biyaha iyo dareerayaasha organic polar, ayaa guud ahaan waxtar u leh kala dirida ethers cellulose.
Heerkulka: Kordhinta heerkulka ayaa kor u qaadi kara milanka iyada oo kordhinaysa tamarta kinetic ee molecules.
Kacsi: Kacdoonka makaanikada ayaa caawin kara kala diris iyadoo kordhinaysa xiriirka ka dhexeeya dareeraha iyo polymerka.
pH: Qaar ka mid ah ethers cellulose sida CMC, pH waxay si weyn u saameyn kartaa milanka sababtoo ah kooxaheeda karboxymethyl.
3. Aaladaha Kala Diridda:
Biyaha: Inta badan ether-ka cellulose-ka ayaa si sahal ah ugu milmay biyaha, taas oo ka dhigaysa dareeraha aasaasiga ah ee codsiyo badan.
Aalkolada: ethanol, methanol, iyo isopropanol ayaa caadi ahaan loo isticmaalaa isku-darka si loo hagaajiyo milanka ethers-ka cellulose, gaar ahaan kuwa leh milanka biyaha xaddidan.
Xalalka Dabiiciga ah: Dimethyl sulfoxide (DMSO), dimethylformamide (DMF), iyo N-methylpyrrolidone (NMP) ayaa badanaa loo isticmaalaa codsiyada khaaska ah halkaas oo loo baahan yahay dareere sare.
4. Farsamooyinka kala dirida:
Kicin fudud: Codsiyo badan, si fudud u walaaqida ethers cellulose ee dareeraha ku habboon heerkulka deegaanka ayaa ku filan kala dirida. Si kastaba ha ahaatee, heerkulka sare iyo wakhtiyada walaaqaya ee dheer ayaa laga yaabaa inay lagama maarmaan u tahay kala diri buuxda.
Kuleylinta: Kuleylinta dareeraha ama isku dhafka dareeraha-polymer-ka waxay soo dedejin kartaa kala-baxa, gaar ahaan ethers-ka cellulose miisaankoodu sarreeyo ama kuwa leh milanka hoose.
Ultrasonication: Kacdoonka Ultrasonic waxay kor u qaadi kartaa kala dirida iyadoo la abuurayo xumbo cavitation kuwaas oo kor u qaadaya kala-goynta isku-darka polymer iyo hagaajinta dhexgalka dareeraha.
Isticmaalka isku-darka: Isku-darka biyaha iyo khamriga ama dareerayaasha kale ee dabiiciga ah ee polar waxay wanaajin kartaa milanka, gaar ahaan ether-ka cellulose ee leh milanka biyaha xaddidan.
5. Tixgelinta Wax-ku-oolka ah:
Cabbirka Qaybaha: Ether-ka cellulose-ka budada ah ayaa si fudud u milmi kara qaybo ka sii weyn sababtoo ah bedka sare ee kordhay.
Diyaarinta Xalka: Diyaarinta xalalka ether-ka cellulose ee hab tallaabo tallaabo ah, sida kala firdhinta polymer-ka qayb ka mid ah dareeraha ka hor inta aan lagu darin inta soo hartay, waxay kaa caawin kartaa ka hortagga isku-duubnaanta iyo hubinta kala dirida lebbiska ah.
Hagaajinta pH: Ethers cellulose u nugul pH, hagaajinta pH ee dareeraha waxay hagaajin kartaa milanka iyo xasilloonida.
Badbaadada: Qaar ka mid ah dareerayaasha loo isticmaalo kala dirida ethers cellulose waxay keeni karaan khataro caafimaad iyo badbaado. Hawo-qaadis habboon iyo qalab ilaalin shaqsiyeed waa in la isticmaalo marka la maaraynayo dareerayaashan.
6. Tixgelinta Gaarka ah ee Codsiga:
Daawooyinka: Ether-ka Cellulose waxaa si weyn loogu isticmaalaa qaabaynta dawooyinka si loo xakameeyo sii daynta, xidhitaanka, iyo dhumucyada. Doorashada habka dareeraha iyo kala diriddu waxay ku xiran tahay shuruudaha diyaarinta ee gaarka ah.
Cuntada: Codsiyada cuntada, ether-ka cellulose waxaa loo isticmaalaa dhumucyada, xasiliyayaal, iyo beddelayaasha baruurta. Alaabooyinka la jaan qaadaya xeerarka cuntada waa in la isticmaalaa, iyo xaaladaha kala diriddu waa in la hagaajiyaa si loo ilaaliyo tayada alaabta.
Dhismaha: Eter-ka Cellulose waxaa loo isticmaalaa qalabka dhismaha sida hoobiye, grouts, iyo xabagta. Xulashada xalalka iyo xaaladaha kala diriddu waxay muhiim u yihiin gaaritaanka viscosity-ka iyo sifooyinka waxqabadka ee la doonayo.
7. Tilmaamaha Mustaqbalka:
Cilmi-baadhis lagu sameeyo xalalka cusub iyo farsamooyinka kala diriddu waxay sii wadaan inay horumariyaan beerta ether chemistry cellulose. Walxaha cagaaran, sida CO2 supercritical iyo dareeraha ionic, waxay bixiyaan beddelaad suurtagal ah oo leh saameyn deegaan oo hoos u dhacay. Intaa waxaa dheer, horumarka injineernimada polymer iyo nanotechnology waxay u horseedi kartaa horumarinta ethers-ka cellulose oo leh hagaajinta milanka iyo sifooyinka waxqabadka.
Kala dirida ethers cellulose waa hannaan dhinacyo badan leh oo saameeya arrimo kala duwan sida qaab-dhismeedka polymer, sifooyinka dareeraha, iyo farsamooyinka kala dirida. Fahamka arrimahan iyo xulashada xalliyeyaasha ku habboon iyo hababka ayaa muhiim u ah gaaritaanka kala diris hufan iyo wanaajinta waxqabadka ethers cellulose ee codsiyada kala duwan.
Waqtiga boostada: Abriil-10-2024