Natiijooyinka baaritaanka Cellulose ether

Falanqaynta iyo soo koobidda natiijooyinka baaritaanka cellulose ether ee saddexda cutub, gunaanadka ugu muhiimsan waa sidan soo socota:

5.1 Gunaanad

1. Cellulose ether soo saarista walxaha ceeriin ee dhirta

(1) Qaybaha shan walxood oo ceeriin ah oo dhirta laga sameeyay (qoyaanka, dambaska, tayada alwaaxa, cellulose iyo hemicellulose) ayaa la cabbiray, saddex walxood oo dhirta laga sameeyayna waa la xushay, sida qoryo geed ah iyo caws qamadi ah.

iyo bagasse si loo soo saaro cellulose, habka soo saarista cellulose-na waa la hagaajiyay. Xaaladaha habka la hagaajiyay,

Nadiifnimada qaraabada ah ee lignocellulose, cellulose cawska qamadiga iyo cellulose bagasse dhammaantood waxay ka sarreeyeen 90%, wax-soo-saarkooduna wuxuu ka sarreeyay 40%.

(2) Falanqaynta spectrum-ka infrared-ka, waxaa la arki karaa in ka dib daaweynta, alaabada cellulose-ka laga soo saaro cawska qamadiga, bagasse-ka iyo alwaax geed

1510 cm-1 (gariir qalfoofka giraanta benzene) iyo qiyaastii 1730 cm-1 (nuugista gariirka fidinta ee carbonyl-ka aan isku xidhnayn ee C=O)

Ma jirin wax sare u kac ah, taasoo muujinaysa in lignin iyo hemicellulose oo ku jira badeecada la soo saaray asal ahaan laga saaray, cellulose-ka la helayna uu lahaa daahirnimo sare.

Waxaa laga arki karaa nuugista dibadda in heerka lignin uu si joogto ah hoos ugu dhaco ka dib tallaabo kasta oo daaweyn ah, nuugista UV ee cellulose-ka la helayna ay yaraato.

Qalooca muuqaalka ee la helay wuxuu u dhawaa qalooca muuqaalka ee nuugista ultraviolet-ka ee potassium permanganate madhan, taasoo muujinaysa in cellulose-ka la helay uu ahaa mid saafi ah.

Falanqaynta kala-soocidda raajada X-ray waxay muujisay in si weyn loo hagaajiyay kristantarrada qaraabada ah ee cellulose-ka badeecada la helay.

2. Diyaarinta ether-yada cellulose

(1) Tijaabada hal-abuurka ah waxaa loo isticmaalay in lagu wanaajiyo habka daaweynta ka hor daaweynta alkali ee alkali ee cellulose-ka pine;

Tijaabooyinka orthogonal iyo tijaabooyin hal-arrimood ah ayaa la sameeyay iyadoo la diyaarinayo CMC, HEC iyo HECMC oo laga sameeyay cellulose alkali alwaax geed ah, siday u kala horreeyaan.

Hagaajinta. Iyada oo la raacayo hababka diyaarinta ugu wanaagsan, CMC oo leh DS ilaa 1.237, HEC oo leh MS ilaa 1.657 ayaa la helay.

iyo HECMC oo leh DS ah 0.869. (2) Sida laga soo xigtay falanqaynta FTIR, marka la barbardhigo cellulose-ka alwaaxda geedka ee asalka ah, carboxymethyl si guul leh ayaa loogu geliyay cellulose ether CMC.

Unugyada cellulose ether HEC, kooxda hydroxyethyl si guul leh ayaa loogu xiray; unugyada cellulose ether HECMC, kooxda hydroxyethyl si guul leh ayaa loogu xiray

Kooxaha Carboxymethyl iyo hydroxyethyl.

(3) Waxaa laga heli karaa falanqaynta H-NMR in kooxda hydroxyethyl lagu soo daro HEC-ga badeecada, HEC-na lagu helo xisaab fudud.

heerka beddelka molar.

(4) Sida laga soo xigtay falanqaynta XRD, marka la barbardhigo cellulose-ka alwaaxda geedka ee asalka ah, ether-yada cellulose-ka CMC, HEC iyo HEECMC waxay leeyihiin

Qaababka kiristaalka ayaa dhammaantood isu beddelay nooca cellulose II, kiristaalnimaduna si weyn ayay hoos ugu dhacday.

3. Isticmaalka koollada ether-ka ee cellulose

(1) Sifooyinka aasaasiga ah ee koollada asalka ah: SA, CMC, HEC iyo HECMC dhammaantood waa dareereyaal pseudoplastic ah, iyo

Kala-soocidda been-abuurka ah ee saddexda ether ee cellulose ayaa ka wanaagsan tan SA, marka la barbar dhigo SA, waxay leedahay qiime PVI oo hooseeya, kaas oo aad ugu habboon daabacaadda qaababka wanaagsan.

Ubax; heerka sameynta koollada ee afarta koollada waa: SA > CMC > HECMC > HEC; awoodda biyaha lagu hayo ee koollada asalka ah ee CMC,

72

Iswaafajinta urea iyo milixda ka hortagga wasakhaynta S waxay la mid tahay SA, xasilloonida kaydinta ee koollada asalka ah ee CMC way ka fiican tahay SA, laakiin

Iswaafajinta koollada cayriin ee HEC ayaa ka xun tan SA;

Iswaafajinta iyo xasilloonida kaydinta ee sodium bicarbonate ayaa ka xun SA;

SA waa isku mid, laakiin awoodda biyaha lagu hayo, iswaafajinta sodium bicarbonate iyo xasilloonida kaydinta ee koollada cayriin ee HEECMC ayaa ka hooseeya SA. (2) Waxqabadka daabacaadda ee koollada: Wax soo saarka midabka muuqda ee CMC iyo u-adkeysiga, dareenka daabacaadda, adkeysiga midabka daabacaadda, iwm. dhammaantood waxay la mid yihiin SA.

heerka depaste-ka ee CMC-na wuu ka fiican yahay kan SA; heerka depaste-ka iyo dareenka daabacaadda ee HEC waxay la mid yihiin SA, laakiin muuqaalka HEC wuu ka fiican yahay kan SA.

Mugga midabka, u-adkeysiga iyo u-adkeysiga midabka xoqidda ayaa ka hooseeya SA; Dareenka daabacaadda HECMC, u-adkeysiga midabka xoqidda waxay la mid yihiin SA;

Saamiga koollada ayaa ka sarreeya SA, laakiin wax soo saarka midabka muuqda iyo xasilloonida kaydinta ee HECMC ayaa ka hooseeya SA.

5.2 Talooyin

Laga soo bilaabo saameynta codsiga ee 5.1 cellulose koollada ether waxaa laga heli karaa, koollada ether cellulose waxaa loo isticmaali karaa firfircoon.

Koolada daabacaadda rinjiga, gaar ahaan kuwa anionic cellulose ethers. Iyada oo ay ugu wacan tahay soo bandhigidda kooxda hydrophilic carboxymethyl, lixda xubnood ee ka kooban

Falcelinta kooxda hydroxyl ee koowaad ee giraanta, iyo dallacaadda taban ka dib ionization isla waqtigaas, waxay kor u qaadi kartaa rinjiyeynta fiilooyinka iyadoo la adeegsanayo midabyo falcelin leh. Si kastaba ha ahaatee, guud ahaan,

Saamaynta isticmaalka koollada daabacaadda ether-ka ee cellulose ma fiicna, inta badan sababtoo ah heerka beddelka ama beddelka molar ee ether-ka cellulose.

Maadaama heerka hoose ee beddelka uu hooseeyo, diyaarinta ether-yada cellulose-ka ee leh heerka beddelka sare ama heerka beddelka sare ee molar-ka waxay u baahan tahay daraasad dheeraad ah.