Celluloseyog lub ntsiab lus tseem ceeb ntawm cov phab ntsa ntawm cov nroj tsuag, thiab yog cov polysaccharide uas faib dav tshaj plaws thiab muaj ntau tshaj plaws hauv xwm, suav txog ntau dua 50% ntawm cov pa roj carbon hauv lub nceeg vaj ntawm cov nroj tsuag. Ntawm lawv, cov ntsiab lus cellulose ntawm paj rwb yog ze li ntawm 100%, uas yog qhov chaw ntshiab tshaj plaws ntawm cov cellulose ntuj. Hauv cov ntoo feem ntau, cellulose suav txog 40-50%, thiab muaj 10-30% hemicellulose thiab 20-30% lignin. Cellulose ether yog ib lo lus dav dav rau ntau yam khoom siv tau los ntawm cov cellulose ntuj ua cov khoom siv raw los ntawm etherification. Nws yog ib yam khoom tsim tom qab cov pab pawg hydroxyl ntawm cellulose macromolecules raug hloov pauv ib feem lossis tag nrho los ntawm cov pab pawg ether. Muaj cov hydrogen bonds hauv cellulose macromolecules, uas nyuaj rau yaj hauv dej thiab yuav luag txhua cov kuab tshuaj organic, tab sis tom qab etherification, kev qhia txog cov pab pawg ether tuaj yeem txhim kho hydrophilicity thiab ua rau muaj kev yaj ntau ntxiv hauv dej thiab cov kuab tshuaj organic. Cov yam ntxwv ntawm kev yaj.
Cellulose ether muaj lub koob npe nrov ntawm "kev lag luam monosodium glutamate". Nws muaj cov khoom zoo heev xws li kev ua kom cov kua tuab, kev yaj dej zoo, kev ruaj khov ntawm kev ncua lossis latex, kev tsim zaj duab xis, kev khaws dej, thiab kev nplaum. Nws kuj tsis muaj tshuaj lom thiab tsis muaj saj, thiab siv dav hauv cov ntaub ntawv tsim kho, tshuaj, khoom noj, textiles, tshuaj txhua hnub, kev tshawb nrhiav roj av, kev khawb av, kev ua ntawv, polymerization, aerospace thiab ntau lwm yam teb. Cellulose ether muaj qhov zoo ntawm kev siv dav, kev siv me me, kev hloov kho zoo, thiab kev phooj ywg ib puag ncig. Nws tuaj yeem txhim kho thiab ua kom zoo dua cov khoom lag luam hauv kev ntxiv nws, uas yog qhov zoo rau kev txhim kho kev siv cov peev txheej thiab cov khoom lag luam ntxiv tus nqi. Cov khoom ntxiv uas zoo rau ib puag ncig uas tseem ceeb hauv ntau qhov teb.
Raws li qhov ionization ntawm cellulose ether, hom substituents thiab qhov sib txawv ntawm solubility, cellulose ether tuaj yeem muab faib ua ntau pawg. Raws li ntau hom substituents, cellulose ethers tuaj yeem muab faib ua cov ethers ib leeg thiab cov ethers sib xyaw. Raws li solubility, cellulose ether tuaj yeem muab faib ua cov khoom yaj hauv dej thiab cov khoom tsis yaj hauv dej. Raws li ionization, nws tuaj yeem muab faib ua ionic, non-ionic thiab cov khoom sib xyaw. Ntawm cov cellulose ethers yaj hauv dej, cov cellulose ethers tsis-ionic xws li HPMC muaj qhov kub thiab txias zoo dua thiab tsis kam ntsev dua li ionic cellulose ethers (CMC).
Yuav ua li cas cellulose ether txhim kho hauv kev lag luam?
Cellulose ether yog ua los ntawm paj rwb zoo los ntawm alkalization, etherification thiab lwm yam kauj ruam. Cov txheej txheem tsim khoom ntawm cov tshuaj HPMC thiab cov khoom noj khoom haus HPMC yeej zoo ib yam. Piv nrog cov khoom siv hauv tsev-qib cellulose ether, cov txheej txheem tsim khoom ntawm cov tshuaj-qib HPMC thiab cov khoom noj khoom haus-qib HPMC xav tau staged etherification, uas yog qhov nyuaj, nyuaj rau tswj cov txheej txheem tsim khoom, thiab xav tau kev huv si ntawm cov khoom siv thiab qhov chaw tsim khoom.
Raws li cov ntaub ntawv muab los ntawm Tuam Tshoj Cellulose Kev Lag Luam Association, tag nrho cov peev xwm tsim khoom ntawm cov tuam txhab tsim khoom tsis-ionic cellulose ether nrog cov peev xwm tsim khoom loj hauv tsev, xws li Hercules Temple, Shandong Heda, thiab lwm yam, tshaj 50% ntawm lub teb chaws tag nrho cov peev xwm tsim khoom. Muaj ntau lwm cov tuam txhab tsim khoom me me tsis-ionic cellulose ether nrog cov peev xwm tsim khoom tsawg dua 4,000 tons. Tsuas yog ob peb lub tuam txhab xwb, feem ntau ntawm lawv tsim cov khoom siv hauv tsev zoo li qub, nrog tag nrho cov peev xwm tsim khoom txog li 100,000 tons hauv ib xyoos. Vim tsis muaj zog nyiaj txiag, ntau lub tuam txhab me me ua tsis tau raws li cov qauv hauv kev nqis peev tiv thaiv ib puag ncig hauv kev kho dej thiab kev kho pa roj kom txo cov nqi tsim khoom. Raws li lub teb chaws thiab tag nrho lub zej zog them sai sai rau kev tiv thaiv ib puag ncig, cov tuam txhab hauv kev lag luam uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev tiv thaiv ib puag ncig yuav maj mam kaw lossis txo qhov tsim khoom. Lub sijhawm ntawd, qhov kev sib sau ua ke ntawm kuv lub teb chaws kev lag luam tsim khoom cellulose ether yuav nce ntxiv.
Cov cai tiv thaiv ib puag ncig hauv tsev tab tom ua kom nruj dua, thiab cov kev cai nruj tau muab tso rau pem hauv ntej rau kev siv tshuab tiv thaiv ib puag ncig thiab kev nqis peev hauv cov txheej txheem tsim khoom ntawmcellulose ether. Cov kev ntsuas tiv thaiv ib puag ncig siab ua rau cov nqi tsim khoom ntawm cov lag luam nce ntxiv thiab tseem tsim kom muaj qhov siab rau kev tiv thaiv ib puag ncig. Cov lag luam uas tsis tuaj yeem ua tau raws li cov kev cai tiv thaiv ib puag ncig yuav maj mam kaw lossis txo qhov kev tsim khoom vim tsis ua raws li cov qauv tiv thaiv ib puag ncig. Raws li lub tuam txhab cov ntawv qhia, cov lag luam uas maj mam txo qhov kev tsim khoom thiab nres qhov kev tsim khoom vim muaj cov yam ntxwv tiv thaiv ib puag ncig yuav muaj tag nrho cov khoom siv txog li 30,000 tons / xyoo ntawm cov khoom siv hauv tsev zoo tib yam cellulose ether, uas yog qhov zoo rau kev nthuav dav ntawm cov lag luam zoo.
Raws li cellulose ether, nws txuas ntxiv mus rau cov khoom lag luam siab thiab muaj nqis ntxiv
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024