Ngokunyuka kolwazi lwehlabathi malunga nokukhuselwa kwendalo kunye nemfuno yophuhliso oluzinzileyo, ishishini loxubo mayeza lijonge ngenkuthalo izisombululo ezihambelana nokusingqongileyo kunye nezizinzileyo. I-cellulose ether derivatives ngokuthe ngcembe ibe enye yezinto ezibalulekileyo zokukhuthaza uphuhliso oluzinzileyo lweshishini lamachiza ngenxa yemithombo yabo yendalo ehlaziyiweyo kunye neempawu ezinokubola.
1. Isishwankathelo esiSisiseko seCellulose Ethers
I-cellulose ethers zizinto zepolymer ezifunyenwe ngokuguqulwa kweekhemikhali zeselulosi yendalo. I-cellulose ifumaneka ngokubanzi kwizityalo, ezifana nomqhaphu kunye neenkuni. Ingundoqo yayo yikhonkco ye-polysaccharide eyenziwe ngamayunithi e-glucose axhunywe ngamabhondi e-β-1,4-glycosidic. Ngokusabela kwe-etherification, amaqela e-hydroxyl e-cellulose adityaniswe neentlobo ezahlukeneyo zamaqela e-ether ukuvelisa uchungechunge lwee-cellulose derivatives, ezifana ne-hydroxypropyl methylcellulose (HPMC), i-methyl cellulose (MC) kunye ne-hydroxyethyl cellulose (HEC). Ezi zinto ziphuma kwi-cellulose ether zinobuchule obubalaseleyo befilimu, i-adhesion, i-thickening kunye nokuzinza kwe-thermal, kwaye zisetyenziswa ngokubanzi kumachiza, ukwakhiwa, ukutya, izimonyo kunye namanye amashishini.
2. Ukusetyenziswa kwe-cellulose ether derivatives kwishishini lamayeza
Abathwali beziyobisi kunye neenkqubo zokukhutshwa okuzinzileyo
Esinye sezona zicelo zisetyenziswa kakhulu kwi-cellulose ether derivatives kumalungiselelo amayeza anjenge-carrier kunye nezinto ezikhutshwayo eziqhubekayo zamachiza. Ngokwenza ifilimu kunye neempawu zokubambelela, i-cellulose ethers ingasetyenziselwa ukulungiselela iipilisi zamachiza, iipilisi kunye neefilimu. Ngokukodwa, kwiinkqubo zokukhutshwa okuzinzileyo, izinto eziphuma kwi-cellulose ezifana ne-HPMC zinokwenza umaleko wejeli emva kokufakwa kwamanzi, ngokuthe ngcembe zikhuphe izithako zeziyobisi, kwaye ziqinisekise ukufunxwa okucothayo nokuqhubekayo kweziyobisi emzimbeni. Obu buchwephesha bokukhululwa ngokuzinzileyo abunakuphucula kuphela ukufumaneka kweziyobisi, kodwa nokunciphisa amaxesha amaninzi amayeza kunye nokunciphisa umthwalo kwizigulana.
Izibophelelo zecwecwe kunye needisintegrants
Kwimveliso yethebhulethi, i-cellulose ether derivatives nayo isetyenziswa ngokubanzi njengezibophelelo kunye ne-disintegrants. Njenge-binder, i-cellulose ether inokunyusa amandla okudibanisa phakathi kweengqungquthela ze powder xa iipilisi zixinzelelwe, ziqinisekisa amandla kunye nokuzinza kweepilisi; njenge-disintegrant, inokukhawuleza ukufunxa amanzi kwaye idumbe emva kokudibana namanzi, ivumela iipilisi ukuba zihlakazeke ngokukhawuleza kwaye zinyibilike kwinkqubo yokugaya, ngaloo ndlela inyusa izinga lokukhululwa kunye nokusebenza kakuhle kweziyobisi.
Amalungiselelo abazali
I-cellulose ether derivatives nayo isetyenziselwa ukulungiselela amalungiselelo omzali, njengabalawuli be-viscosity kunye ne-stabilizers kumachiza e-intravenous. Iimpawu zayo ezikhethekileyo zomzimba kunye neekhemikhali ziyenza izinze emva kokuvalwa kobushushu obuphezulu ngaphandle kokuchaphazela umsebenzi webhayoloji wechiza. Ngelo xesha, i-non-toxicity kunye ne-biocompatibility ye-cellulose ethers nayo iqinisekisa ukhuseleko lwayo emzimbeni.
3. Igalelo lezinto eziphuma kwi-cellulose ether kuzinzo kwishishini loxubo mayeza.
Ithathwe kwimithombo yendalo, enokuhlaziywa
Inzuzo ebalulekileyo ye-cellulose derivatives kukuba ivela kwimithombo yendalo ehlaziyiweyo efana nekotoni kunye neenkuni. Oku kwahluke kakhulu kwiipholima zokwenziwa zemveli (ezifana ne-polyethylene, i-polypropylene, njl.). Izinto zokwenziwa zemveli zihlala zixhomekeke kwiimveliso zepetrochemical, ezikhokelela ekuxhatshazweni ngokugqithisileyo kwemithombo engahlaziyekiyo kunye neengxaki zokungcoliseka kwendalo. Ngokwahlukileyo, i-cellulose, njengezinto ezisekelwe kwi-bio-based, inokubonelelwa ngokuqhubekayo ngokukhula komjikelo wezityalo, ukunciphisa ukuxhomekeka kwimithombo yepetrochemical.
I-biodegradable, ukunciphisa ukungcoliseka kwendalo
Olunye uncedo oluphambili lwe-cellulose ether derivatives kukuba banokubola okuhle kwe-biodegradability. Ngokungafaniyo neeplastiki zemveli kunye nezinto zokwenziwa, i-cellulose ethers inokubola yi-microorganisms kwindawo yendalo kwaye ekugqibeleni ivelise izinto ezingenabungozi ezifana namanzi kunye ne-carbon dioxide. Oku kunciphisa kakhulu impembelelo engalunganga yenkunkuma kwindalo esingqongileyo ngexesha lemveliso yamayeza kwaye inceda ekunciphiseni ungcoliseko lomhlaba kunye nemizimba yamanzi ngenkunkuma eqinileyo.
Ukonga amandla kunye nokunciphisa ukukhutshwa kwekhabhoni
Inkqubo yokuvelisa i-cellulose ethers iphantsi kakhulu ekusebenziseni amandla, kwaye ukuguqulwa kweekhemikhali kunye nokucubungula kunokufezekiswa kumaqondo okushisa aphantsi, ahluke kakhulu kwinkqubo yokuvelisa amandla aphezulu kwezinye iipolymers zokwenziwa. Ngexesha elifanayo, ngenxa yeempawu ezilula zezinto ezisekelwe kwi-cellulose, zinokunciphisa ukusetyenziswa kwamandla kunye nokukhutshwa kwekhabhoni ngexesha lokuthutha kunye nokupakishwa.
Green Chemistry Principles
Inkqubo yokuhlanganiswa kwezinto eziphuma kwi-cellulose ether inokulandela imigaqo ye-chemistry eluhlaza, oko kukuthi, ngokunciphisa ukusetyenziswa kweekhemikhali ezinobungozi kunye nokuphucula iimeko zokusabela ukunciphisa ukuveliswa kweemveliso, ngaloo ndlela kuncitshiswe impembelelo kokusingqongileyo. Ngokomzekelo, inkqubo yokuvelisa i-ethers ye-cellulose yanamhlanje iye yamkela iinkqubo zokunyibilikisa ezihambelana nokusingqongileyo kunye ne-catalysts, eye yanciphisa kakhulu ukukhutshwa kwenkunkuma enetyhefu.
4. Umbono wekamva
Ngophuhliso oluqhubekayo lwamayeza aluhlaza, amathuba okusetyenziswa kwe-cellulose ether derivatives kwishishini lamachiza liya kuba libanzi. Ukongeza kwisicelo sayo kumalungiselelo aqinileyo kunye neenkqubo zokukhutshwa ngokuzinzileyo, i-cellulose ethers nayo iya kudlala indima enkulu kwiinkqubo ezintsha zokuhanjiswa kweziyobisi, izinto ze-biomedical kunye nezinye iinkalo. Ukongezelela, ngokuqhubela phambili okuqhubekayo kweteknoloji ye-cellulose derivative synthesis, ukuphuhliswa kweenkqubo zokulungiselela ezisebenzayo kunye neendleko eziphantsi kuya kukhuthaza ngakumbi ukuthandwa kwayo kwishishini lamachiza.
Ishishini lamachiza liya kunika ingqalelo ngakumbi ukusetyenziswa kwezinto ezihambelana nokusingqongileyo, kunye ne-cellulose ether derivatives, njengento ehlaziywayo, ehlaziywayo kunye ne-multifunctional material, ngokungathandabuzekiyo iya kudlala indima ebalulekileyo kule nkqubo yokuguqulwa.
I-cellulose ether derivatives iphucule kakhulu ukuzinza kweshishini lamachiza ngokuhlaziywa kwazo, ukubola kwezinto eziphilayo kunye nokusetyenziswa okubanzi kwimveliso yamayeza. Abagcini nje ukunciphisa ukuxhomekeka kwimithombo engahlaziyekiyo, kodwa benza igalelo elibalulekileyo ekukhuselweni kwendalo. I-cellulose ether derivatives kulindeleke ukuba iqhubeke idlala indima ebalulekileyo kwixesha elizayo lokuvelisa amayeza ohlaza kunye nophuhliso oluzinzileyo.
Ixesha lokuposa: Sep-23-2024