I-Celluloseyeyona nto iphambili eludongeni lweeseli zezityalo, kwaye yeyona polysaccharide isasazeke kakhulu kwaye ininzi kakhulu kwindalo, ibandakanya ngaphezulu kwe-50% yomxholo wekhabhoni kubukumkani bezityalo. Phakathi kwazo, umxholo we-cellulose wekotoni usondele kwi-100%, ongumthombo we-cellulose wendalo ococekileyo. Ngokubanzi, i-cellulose ibandakanya i-40-50%, kwaye kukho i-10-30% ye-hemicellulose kunye ne-20-30% ye-lignin. I-Cellulose ether ligama eliqhelekileyo leentlobo ngeentlobo zezinto ezifumaneka kwi-cellulose yendalo njengezinto eziluhlaza ngokusebenzisa i-etherification. Yimveliso eyenziwe emva kokuba amaqela e-hydroxyl kwi-cellulose macromolecules ethatyathelwe indawo ngokuyinxenye okanye ngokupheleleyo ngamaqela e-ether. Kukho iibhondi ze-hydrogen zangaphakathi kunye ne-inter-chain kwi-cellulose macromolecules, ezinzima ukuzinyibilikisa emanzini kwaye phantse kuzo zonke izinyibilikisi zendalo, kodwa emva kwe-etherification, ukungeniswa kwamaqela e-ether kunokuphucula i-hydrophilicity kwaye kwandise kakhulu ukunyibilika emanzini nakwizinyibilikisi zendalo. Iipropati zokunyibilika.
I-Cellulose ether idume ngokuba yi-"industrial monosodium glutamate". Ineempawu ezintle kakhulu ezifana nokuqina kwesisombululo, ukunyibilika kwamanzi kakuhle, ukuzinza kwe-suspension okanye i-latex, ukwakheka kwefilimu, ukugcinwa kwamanzi, kunye nokunamathela. Ayinabungozi kwaye ayinancasa, kwaye isetyenziswa kakhulu kwizixhobo zokwakha, amayeza, ukutya, amalaphu, iikhemikhali zemihla ngemihla, uphando lwepetroleum, ukumbiwa kwemigodi, ukwenza iphepha, ukupholisa, i-aerospace kunye nezinye iinkalo ezininzi. I-Cellulose ether inezibonelelo zokusetyenziswa ngokubanzi, ukusetyenziswa kweyunithi encinci, isiphumo esihle sokuguqulwa, kunye nobuhlobo nokusingqongileyo. Ingaphucula kakhulu kwaye iphucule ukusebenza kwemveliso kwicandelo lokongeza kwayo, okunceda ukuphucula ukusebenza kakuhle kokusetyenziswa kwezixhobo kunye nexabiso elongezelelweyo lemveliso. Izongezo ezinobuhlobo nokusingqongileyo ezibalulekileyo kwiinkalo ezahlukeneyo.
Ngokwe-ionization ye-cellulose ether, uhlobo lwezinto ezithatha indawo kunye nomahluko ekunyibilikeni, i-cellulose ether inokwahlulwahlulwa ibe ziindidi ezahlukeneyo. Ngokweentlobo ezahlukeneyo zezinto ezithatha indawo, ii-cellulose ethers zinokwahlulwa zibe zii-single ethers kunye nee-mixed ethers. Ngokwe-solubility, i-cellulose ether inokwahlulwa ibe ziimveliso ezinyibilikayo emanzini nezingenakunyibilika emanzini. Ngokwe-ionization, inokwahlulwa ibe ziimveliso ze-ionic, ezingezizo ze-ionic kunye nezixutyiweyo. Phakathi kwee-ether ze-cellulose ezinyibilikayo emanzini, ii-ether ze-cellulose ezingezizo ze-ionic ezifana ne-HPMC zinokumelana nobushushu obungcono kakhulu kunye nokumelana netyuwa kunee-ether ze-ionic cellulose (CMC).
Iphucuka njani i-cellulose ether kushishino?
I-Cellulose ether yenziwe ngekotoni ecociweyo ngokusebenzisa i-alkalizing, i-etherification kunye namanye amanyathelo. Inkqubo yokuvelisa i-HPMC yeklasi yamayeza kunye ne-HPMC yeklasi yokutya iyafana ngokusisiseko. Xa ithelekiswa ne-cellulose ether yeklasi yezinto zokwakha, inkqubo yokuvelisa i-HPMC yeklasi yamayeza kunye ne-HPMC yeklasi yokutya ifuna i-etherification ehleliweyo, enzima, enzima ukuyilawula inkqubo yokuvelisa, kwaye ifuna ucoceko oluphezulu lwezixhobo kunye nendawo yokuvelisa.
Ngokwedatha ebonelelwe yiChina Cellulose Industry Association, amandla emveliso iyonke yabavelisi be-non-ionic cellulose ether abanomthamo omkhulu wemveliso yasekhaya, njengeHercules Temple, Shandong Heda, njl., idlula i-50% yamandla emveliso iyonke yesizwe. Kukho abanye abavelisi abaninzi abancinci be-non-ionic cellulose ether abanomthamo wemveliso ongaphantsi kweetoni ezingama-4,000. Ngaphandle kwamashishini ambalwa, uninzi lwawo luvelisa ii-cellulose ethers eziqhelekileyo zezinga lezinto zokwakha, ezinomthamo wemveliso iyonke omalunga neetoni ezili-100,000 ngonyaka. Ngenxa yokungabikho kwamandla emali, amashishini amaninzi amancinci ayasilela ukuhlangabezana nemigangatho yotyalo-mali lokukhusela okusingqongileyo kunyango lwamanzi kunye nonyango lwegesi yokukhupha umoya ukuze kuncitshiswe iindleko zemveliso. Njengoko ilizwe kunye noluntu lonke benika ingqalelo ngakumbi kukhuseleko lokusingqongileyo, loo mashishini akwishishini angakwaziyo ukuhlangabezana neemfuno zokhuseleko lokusingqongileyo aya kuvala kancinci okanye anciphise imveliso. Ngelo xesha, ukuxinana kweshishini lokuvelisa i-cellulose ether yelizwe lam kuya kwanda ngakumbi.
Imigaqo-nkqubo yokukhusela indalo yasekhaya iya isiba ngqongqo ngakumbi, kwaye kubekwa iimfuno ezingqongqo kwitekhnoloji yokukhusela indalo kunye notyalo-mali kwinkqubo yemvelisoi-cellulose ether. Amanyathelo okhuseleko lokusingqongileyo asemgangathweni ophezulu anyusa iindleko zemveliso zamashishini kwaye enza umda ophezulu wokhuseleko lokusingqongileyo. Amashishini angakwaziyo ukuhlangabezana neemfuno zokhuseleko lokusingqongileyo kusenokwenzeka ukuba avalwe kancinci kancinci okanye anciphise imveliso ngenxa yokusilela ukuhlangabezana nemigangatho yokhuseleko lokusingqongileyo. Ngokwengxelo yenkampani, amashishini anciphisa kancinci kancinci imveliso aze ayeke ukuvelisa ngenxa yezinto zokhuseleko lokusingqongileyo anokubandakanya ukunikezelwa okupheleleyo malunga neetoni ezingama-30,000 ngonyaka we-cellulose ether yezinto zokwakha eziqhelekileyo, nto leyo enceda ekwandiseni amashishini anenzuzo.
Ngokusekelwe kwi-cellulose ether, iyaqhubeka nokufikelela kwiimveliso eziphezulu nezinexabiso eliphezulu.
Ixesha leposi: Epreli-25-2024