Ngokuhlalutya kunye nesishwankathelo seziphumo zovavanyo lwe-cellulose ether kwizahluko ezithathu, izigqibo eziphambili zilandelayo:
5.1 Isiphelo
1. Cellulose ether utsalo kwizinto ezikrwada zezityalo
(1) Amacandelo amahlanu ezixhobo zezityalo (ukufuma, uthuthu, umgangatho womthi, i-cellulose kunye ne-hemicellulose) alinganisiwe, kunye nezixhobo ezintathu ezimele izityalo, i-pine sawdust kunye ne-wheat straw, zakhethwa.
kunye ne-bagasse yokukhupha i-cellulose, kunye nenkqubo yokukhutshwa kwe-cellulose yaphuculwa.Ngaphantsi kweemeko zenkqubo ephuculweyo, i
Ukucoceka kwe-lignocellulose, i-wheat straw cellulose kunye ne-bagasse cellulose zonke zazingaphezu kwe-90%, kwaye izivuno zazo zonke zazingaphezu kwama-40%.
(2) Ukususela kuhlalutyo lwe-infrared spectrum, kunokubonwa ukuba emva kokunyanga, iimveliso ze-cellulose ezikhutshwe kwi-wheat straw, i-bagasse kunye ne-pine sawdust.
Ku-1510 cm-1 (ukungcangcazela kwamathambo eringi ye-benzene) kunye nokujikeleza i-1730 cm-1 (ukufunxa ukungcangcazela kwe-non-conjugated carbonyl C=O)
Kwakungekho ziphakamileyo, ezibonisa ukuba i-lignin kunye ne-hemicellulose kwimveliso ekhutshiweyo isuswe ngokusisiseko, kwaye i-cellulose efunyenweyo inobunyulu obuphezulu.ngomfusa
Inokubonwa kwi-spectrum yokufunxa yangaphandle ukuba umxholo we-lignin uyancipha ngokuqhubekayo emva kwesinyathelo ngasinye sonyango, kwaye ukuxutywa kwe-UV ye-cellulose efunyenweyo kuncipha.
Ijiko le-spectral elifunyenweyo lalikufutshane ne-ultraviolet absorption curve ye-blank potassium permanganate, ebonisa ukuba i-cellulose efunyenweyo yayisulungekile.ngu-X
Uhlalutyo lwe-X-ray diffraction lubonise ukuba i-crystallinity ehambelanayo ye-cellulose yemveliso efunyenweyo iphuculwe kakhulu.
2. Ukulungiswa kwee-ether ze-cellulose
(1) Uvavanyo lwento enye lusetyenziselwe ukongeza inkqubo egxininisiweyo yealkali decrystallization pretreatment yepine cellulose;
Imifuniselo ye-Orthogonal kunye nemifuniselo yento enye yenziwa ekulungiseleleni i-CMC, i-HEC kunye ne-HECMC ukusuka kwi-pine wood alkali cellulose, ngokulandelanayo.
ulungiselelo.Ngaphantsi kweenkqubo ezifanelekileyo zokulungiselela, i-CMC ene-DS ukuya kwi-1.237, i-HEC ene-MS ukuya kwi-1.657 yafunyanwa.
kunye ne-HECMC ene-DS ye-0.869.(2) Ngokutsho kohlalutyo lwe-FTIR, xa kuthelekiswa ne-original pine wood cellulose, i-carboxymethyl yafakwa ngempumelelo kwi-cellulose ether CMC.
Kwi-cellulose ether HEC, iqela le-hydroxyethyl lixhunywe ngempumelelo;kwi-cellulose ether HECMC, iqela le-hydroxyethyl lixhunywe ngempumelelo
Amaqela e-Carboxymethyl kunye ne-hydroxyethyl.
(3) Inokufumaneka kuhlalutyo lwe-H-NMR ukuba iqela le-hydroxyethyl lingeniswa kwi-HEC yemveliso, kwaye i-HEC ifunyenwe ngokubala okulula.
iqondo lemolar lokuthatha indawo.
(4) Ngokohlalutyo lwe-XRD, xa kuthelekiswa neselulosi yeplanga yoqobo, i-cellulose ethers CMC, HEC kunye ne-HEECMC zine
Iifom ze-crystal zonke zitshintshile kwi-cellulose uhlobo lwe-II, kwaye i-crystallinity yehla kakhulu.
3. Ukusetyenziswa kwe-cellulose ether paste
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I-pseudoplasticity ye-ethers ye-cellulose emithathu ingcono kune-SA, kwaye xa kuthelekiswa ne-SA, inexabiso eliphantsi le-PVI, elifaneleke ngakumbi ukuprinta iipateni ezilungileyo.
Intyatyambo;ulandelelwano lwesantya sokwenziwa kwentlama yeentlama ezine zezi: SA > CMC > HECMC > HEC;umthamo wokubamba amanzi we-CMC intlama yokuqala,
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Ukuhambelana kwe-urea kunye ne-anti-staining ityuwa ye-S ifana ne-SA, kunye nozinzo lokugcina lwe-CMC ye-original paste ingcono kune-SA, kodwa
Ukuhambelana kwe HEC intlama ekrwada kubi kakhulu kunoMzantsi Afrika;
Ukuhambelana kunye nokugcinwa kozinzo lwe-sodium bicarbonate kubi kune-SA;
I-SA iyafana, kodwa umthamo wokubamba amanzi, ukuhambelana ne-sodium bicarbonate kunye nokuzinza kokugcinwa kwe-HEECMC intlama eluhlaza ingaphantsi kune-SA.(2) Ukusebenza koshicilelo lokuncamathisela: I-CMC ebonakalayo isivuno sombala kunye nokungeneka, ukuvakala koshicilelo, ukuprintwa kombala okhawulezayo, njl.njl. zonke zithelekiseka no-SA.
kwaye izinga lokulahla i-CMC lingcono kunelo loMzantsi Afrika;izinga le-depaste kunye ne-printing feeling ye-HEC iyafana ne-SA, kodwa imbonakalo ye-HEC ingcono kune-SA.
Umthamo wombala, ukunyanzeliswa kunye nokukhawuleza kombala ukuhlikihla kungaphantsi kwe-SA;I-HECMC yokushicilela ivakalelwa, ukukhawuleza kombala ukuxubha kufana ne-SA;
Umlinganiselo wokuncamathelisa ungaphezulu kuno-SA, kodwa isivuno esibonakalayo sombala kunye nozinzo lokugcina lwe-HECMC lungaphantsi kunoMzantsi Afrika.
5.2 Iingcebiso
Ukususela kwisiphumo sokusetyenziswa kwe-5.1 cellulose ether paste inokufumaneka, i-cellulose ether paste ingasetyenziselwa ukusebenza.
Iintlama zokuprinta idayi, ngakumbi i-anionic cellulose ethers.Ngenxa yokuqaliswa kweqela le-hydrophilic carboxymethyl, amalungu amathandathu
I-reactivity yeqela eliphambili le-hydroxyl kwindandatho, kunye nentlawulo embi emva kwe-ionization ngexesha elifanayo, inokukhuthaza ukudaywa kweefibers ngedayi ezisebenzayo.Nangona kunjalo, ngokupheleleyo,
Isiphumo sesicelo se-cellulose ether yokuprinta intlama ayilungile kakhulu, ikakhulu ngenxa yeqondo lokutshintshwa okanye ukutshintshwa kwe-molar ye-cellulose ether.
Ngenxa yeqondo eliphantsi lokutshintshwa, ukulungiswa kwee-ether ze-cellulose ezineqondo eliphezulu lokutshintshela okanye isidanga esiphezulu sokutshintshwa kwe-molar kufuna ukuqhubela phambili isifundo.
Ixesha lokuposa: Oct-08-2022