I-ethers ye-cellulose ehlaziyiweyo liqela elihlukeneyo leekhemikhali zemichiza ephuma kwi-cellulose, i-polymer yendalo efumaneka kwiindonga zeeseli zezityalo. I-Cellulose yi-linear chain polymer eyenziwe ngeeyunithi ze-glucose ezidityaniswe kunye ne-β-1,4-glycosidic bonds. Yeyona polymer yendalo ininzi emhlabeni kwaye ineepropathi ezininzi eziluncedo ezinje ngokuqina okuphezulu, ukuxinana okuphantsi, ukubola kwezinto eziphilayo, kunye nokuhlaziya.
I-ethers ye-cellulose ehlaziyiweyo yenziwe ngokuzisa amaqela ahlukeneyo ekhemikhali kwi-molecule ye-cellulose, eguqula iimpawu zayo zomzimba kunye neekhemikhali. Olu tshintsho lunokufezekiswa ngeendlela ezininzi, kubandakanya i-etherification, i-esterification, kunye ne-oxidation. Iziphumo eziguquliweyo ze-cellulose ethers zinoluhlu olubanzi lwezicelo kumashishini ahlukeneyo, kubandakanya ukutya, amayeza, izinto zokuthambisa, ulwakhiwo, kunye namalaphu.
Olunye uhlobo oluqhelekileyo lwe-ether ye-cellulose ehlaziyiweyo yi-methyl cellulose (MC), eyenziwa ngokuphendula i-cellulose nge-methyl chloride. I-MC yi-non-ionic, i-polymer enyibilikayo emanzini esetyenziswa ngokubanzi njenge-agent yokuqina ekutyeni, njenge-binder kwi-ceramics, kunye ne-coating in papermaking. I-MC inenani leenzuzo ngaphezu kwezinye ii-thickeners, ezifana nokukwazi ukwenza iijeli ezibonakalayo, ubutyhefu bayo obuphantsi, kunye nokumelana nokuwohloka kwe-enzyme.
Olunye uhlobo lwe-ether ye-cellulose ehlaziyiweyo yi-hydroxypropyl methyl cellulose (HPMC), eyenziwa ngokuphendula i-cellulose ngomxube we-propylene oxide kunye ne-methyl chloride. I-HPMC yi-non-ionic, i-polymer e-soluble yamanzi esetyenziswa ngokubanzi njenge-arhente yokuqina ekutyeni kunye neemveliso zokunyamekela komntu, njenge-binder kwiipilisi zamachiza, nanjengento yokugquma kushishino lokwakha. I-HPMC ineenzuzo ezininzi ngaphezu kwezinye ii-thickeners, ezifana nokukwazi ukwenza iijeli ezizinzileyo kwiindawo eziphantsi, i-viscosity yayo ephezulu kumaqondo aphantsi, kunye nokuhambelana kwayo kunye noluhlu olubanzi lwezinye izithako.
I-Carboxymethyl cellulose (CMC) lolunye uhlobo lwe-ether ye-cellulose ehlaziyiweyo eyenziwa ngokusabela i-cellulose kunye ne-monochloroacetic acid. I-CMC yipolima enyibilikayo emanzini esetyenziswa ngokubanzi njenge-arhente etyebisayo, isizinzisi, kunye ne-emulsifier ekutyeni, kumayeza, nakwiimveliso zokhathalelo lomntu. I-CMC ineengenelo ezininzi ngaphezu kwezinye izityebi, ezinje ngokukwazi ukwenza iijeli ezicacileyo, umthamo wayo ophezulu wokubamba amanzi, kunye nokumelana nokuwohloka kwe-enzyme.
I-Ethyl cellulose (EC) luhlobo lwe-ether ye-cellulose ehlaziyiweyo eyenziwa ngokusabela i-cellulose nge-ethyl chloride. I-EC i-non-ionic, i-polymer enganyibilikiyo yamanzi esetyenziswa ngokubanzi njengengubo kwishishini lamachiza. I-EC ineenzuzo ezininzi kunezinye iingubo, ezifana nokukwazi ukwenza ifilimu eqhubekayo, i-viscosity yayo ephantsi, kunye nokumelana nokufuma kunye nobushushu.
I-Hydroxyethyl cellulose (HEC) lolunye uhlobo lwe-ether ye-cellulose ehlaziyiweyo eyenziwa ngokuphendula i-cellulose nge-ethylene oxide. I-HEC i-polymer e-soluble yamanzi esetyenziswa ngokubanzi njenge-agent ekhuni kwiimveliso zokunyamekela komntu kunye ne-binder kwiipilisi zamachiza. I-HEC ineenzuzo ezininzi ngaphezu kwezinye i-thickeners, ezifana nokukwazi ukwenza iigels ezibonakalayo, umthamo wayo ophezulu wokubamba amanzi, kunye nokuhambelana kwayo kunye noluhlu olubanzi lwezinye izithako.
Iipropati kunye nokusetyenziswa kwe-ethers ye-cellulose ehlaziyiweyo ixhomekeke kwizinto ezininzi, ezifana nodidi lweqela lemichiza elaziswayo, iqondo lokutshintshwa, ubunzima bemolekyuli, kunye nokunyibilika. Umzekelo, ukunyusa umgangatho wokutshintshwa kwe-MC okanye i-HPMC kunokunyusa umthamo wabo wokubamba amanzi kunye ne-viscosity, ngelixa kunciphisa ukunyibilika kwabo. Ngokufanayo, ukwandisa ubunzima bemolekyuli ye-CMC kunokunyusa i-viscosity yayo kunye nokukwazi kwayo ukwenza iigels, ngelixa inciphisa amandla ayo okubamba amanzi.
Ukusetyenziswa kwee-ether ze-cellulose ezilungisiweyo zininzi kwaye zahlukeneyo. Kwishishini lokutya, zisetyenziswa njengee-agent ezityebisayo, izizinzi, kunye ne-emulsifiers kuluhlu olubanzi lweemveliso, kubandakanya isuphu, iisosi, izinxibo kunye nezimuncumuncu. I-ethers ye-cellulose ehlaziyiweyo isetyenziselwa ukuveliswa kokutya okunamafutha aphantsi kunye neekhalori eziphantsi, njengoko ziyakwazi ukulinganisa ukuthungwa kunye nomlomo wamafutha ngaphandle kokongeza iikhalori. Ukongeza, zisetyenziswa njengeengubo kunye ne-glazes kwiimveliso ze-confectionery ukuphucula ukubonakala kwazo kunye nobomi beshelufu.
Kumashishini amayeza, ii-ether ze-cellulose ezitshintshiweyo zisetyenziswa njengezibophelelo, i-disintegrants, kunye neengubo kwiipilisi kunye neepilisi. Zikwasetyenziswa njenge-viscosity modifiers kwi-formulation ye-liquid, njenge-syrups kunye nokumiswa. Ii-ether ze-cellulose ezilungisiweyo zikhethwa ngaphezu kwezinye izinto ezincedisayo, njengoko zingasebenzi, zihambelana ne-biocompatible, kwaye zinetyhefu ephantsi. Bakwanikezela ngezinga eliphezulu lokulawula izinga lokukhululwa kweziyobisi, elinokuphucula ukusebenza kunye nokhuseleko lwazo.
Kushishino lwezithambiso, ii-ether zeselulosi ezilungisiweyo zisetyenziswa njengezinto ezityebisayo, izithambiso, neziqinisayo kwiikhrimu, izinto zokuthambisa, kunye neejeli. Zikwasetyenziswa njengeejenti zokwenza ifilim kwiimveliso zokhathalelo lweenwele, ezinje ngeeshampu kunye neeconditioners. I-ethers ye-cellulose elungisiweyo inokuphucula ukuthungwa kunye nokubonakala kweemveliso zokuthambisa, kunye nokuphucula ukusebenza kwazo kunye nokuzinza.
Kushishino lokwakha, ii-ether zecellulose ezilungisiweyo zisetyenziswa njengezinto ezityebisayo, izidibanisi, nezigcina amanzi kwisamente, udaka nodaka. Banokuphucula ukusebenza, ukuhambelana, kunye namandla ezi zixhobo, kunye nokunciphisa ukushwabana kwabo kunye nokuqhekeka. Ii-ether ze-cellulose ezitshintshiweyo zikwasetyenziswa njengezinto zokugquma kunye nokunamathelisa kwiindonga kunye nemigangatho.
Kumzi mveliso welaphu, ii-ether ze-cellulose ezilungisiweyo zisetyenziswa njengee-agent zokulinganisa kunye ne-thickeners ekuveliseni amalaphu kunye neentambo. Banokuphucula indlela yokuphatha kunye nokulukwa kwezinto ezilukiweyo, kunye nokomeleza amandla kunye nokuqina kwazo.
Lilonke, ii-ether ze-cellulose ezilungisiweyo zinezinto ezininzi kwaye zixabisekile iikhompawundi ezinosetyenziso oluninzi kumashishini ahlukeneyo. Banikezela ngeenzuzo ezininzi ngaphezulu kwezinye iipolymers, ezinje ngokuhambelana nebhayoloji, ukubola kwebhayoloji, kunye nendalo enokuhlaziywa. Bakwanikezela ngezinga eliphezulu lolawulo kwiipropati zomzimba kunye neekhemikhali zeemveliso, ezinokuphucula umgangatho kunye nokusebenza kwazo. Ngaloo ndlela, ii-ethers ze-cellulose ezilungisiweyo zinokuthi ziqhubeke zidlala indima ebalulekileyo kuphuhliso lweemveliso ezintsha kunye nentsha kwixesha elizayo.
Ixesha lokuposa: Apr-22-2023