Yini Mhec methyl hydroxyethyl cellulose?

I-methyl hydroxyethyl cellulose (Mhec): Ukubuka okuphelele okuphelele

Isingeniso:

I-methyl hydroxyyethyl celtulese, evame ukufushaniswa njenge-MHEC, i-ether ye-cellulose ethole ukuvelela kuyo yonke imboni yezakhiwo zayo ezihlukile nezisebenziseka kalula. Lokhu kususelwa kwamakhemikhali kwe-cellulose kuthola izinhlelo zokusebenza ekwakheni, amakhambi, izimonyo, nokuningi. Kulokubukwa okuphelele, singena esakhiweni, ezakhiweni, izinqubo zokukhiqiza, kanye nezicelo ezahlukahlukene ze-MHEC.

Isakhiwo samakhemikhali:

I-MHEC i-ether eguquliwe etholwa ethathwe kwi-polymer cellulose yemvelo, i-carbohydrate eyinkimbinkimbi ehlanganisa amayunithi we-glucose. Ukuguqulwa kuhlanganisa ukwethula amaqembu we-methylyethyyls kwi-cellulose backbone. Lokhu kuguqulwa kunikeza izici ezithile ku-MHEC, okwenza kube lula ukuthola izicelo ezahlukahlukene.

Izakhiwo ze-MHEC:

1. Ukuqina kanye nokulawulwa kwe-viscosity:

UMhec udume ngezakhiwo zawo zokuqina, okwenza kube ngumenzeli ophumelelayo wokulawula ukubonwa kwezixazululo. Lesi sici sibaluleke ikakhulukazi ezimbonini lapho kubalulekile khona ukulawulwa kwe-heary, njengokusekwathini ngopende, ukunamathela kanye nemikhiqizo ehlukahlukene ewuketshezi.

2. Ukugcinwa kwamanzi:

Enye yezinto eziphawuleka ze-Mhec yikhono layo lokugcina amanzi. Endaweni yokwakha izinto zokwakha, njengodaka nosimende, uMhec usebenza njenge-ejenti enhle yokugcina amanzi. Leli khono lisiza ukuvikela ukomisa okusheshayo, ukuthuthukisa ukukhiqizwa kanye nokunamathelisa ekusetshenzisweni kwalezi zinto zokwakha.

3. I-Binder emikhiqizweni yokwakha:

UMhec udlala indima ebalulekile njenge-binder ekwakhekeni kwemikhiqizo yokwakha. Ama-tile anamathela, ama-cend-based rendmers, kanye namakhompiyutha ahlangene ayazuza ngokungezwa kwe-MHEC, okuthuthukisa ukusebenza kwawo jikelele nokuqina.

4. Izicelo zezemithi kanye nezimonyo:

Izimboni zezemithi nezomkhuba ziye zamukele i-MHEC ngokusebenza kwayo okuhlukahlukene. Emakhishini emithi, i-Mhec isebenza njengesikhulu, i-stabilizer, kanye ne-binter ngamafomu ahlukahlukene umthamo, kufaka phakathi imishanguzo yomlomo nezinhlelo zokusebenza ze-toxical njengamafutha nokhilimu. Ngokufanayo, imboni yezimonyo ifaka i-MHEC ngekhono layo lokuthuthukisa ukuthungwa nokuqina kwemikhiqizo.

I-5. Izakhiwo ezenziwe ngefilimu:

I-MheC ikhombisa izakhiwo ezakha amafilimu, okwenza ilungele izinhlelo zokusebenza ku-Coatings kanye nama-adhesives. Lesi sici sinomthelela ekwakhekeni kwefilimu ehlanganayo nelivikelayo, okwenza ngcono umkhiqizo wokugcina.

Inqubo Yokukhiqiza:

Ukukhiqizwa kwe-MHec kufaka izinyathelo eziningana, ukuqala ngokukhishwa kwe-cellulose emithonjeni esekwe kwizitshalo. I-Wood Pulp iyinto ejwayelekile yokuqala, yize eminye imithombo efana nekotini nezinye izitshalo ze-fibrous kungenzeka zisetshenziselwe. I-cellulose bese ifakwa ngaphansi kokuguqulwa kwamakhemikhali ngezinqubo zokuthepha, yethula amaqembu we-methylyeth kanye ne-hydroxyethyls ku-cellulose chain. Izinga lokufakwa esikhundleni kanye nesisindo se-molecular zingalawulwa ngesikhathi sokukhiqiza, ukuvumela ukwenza ngokwezifiso kwe-MHEC ukufeza izidingo ezithile zohlelo lokusebenza.

Izicelo ze-MHEC:

1. Imboni yezokwakha:

UMhec uthola ukusetshenziswa kakhulu embonini yezokwakha. Njenge-ejenti yokugcinwa kwamanzi, kuthuthukisa ukusebenziseka kwezinto zokwakha i-cementional, kufaka phakathi udaka kanye nama-grouts. Izakhiwo zayo ezibophayo zifaka isandla ekwakhekeni kwama-adhesives aphezulu wokusebenza kwamathayili, udaka kanye namakhompiyutha ahlanganyelwe.

2. Ukwakheka kwemithi:

Emkhakheni wezemikhakha, iMhec iqashwa ngezindlela ezahlukahlukene. Indima yayo njengomenzeli wokuqina kanye ne-binder ibalulekile ekukhiqizweni kwamathebulethi, amaphilisi kanye nokwakhiwa kwezindawo eziphakeme. Izinhlelo zokukhishwa kwezidakamizwa ezilawulwayo nazo zingahlomula ngezakhiwo ze-Rhec ze-MHEC.

3. Izimonyo nemikhiqizo yokunakekelwa komuntu siqu:

Izakhi zezimonyo zivame ukufaka i-MHEC ukufezekisa ukuthungwa okufiselekayo, ukuqina, kanye nokubonakala. Okhilimu, ama-lotions, nama-gels angasebenzisa i-MHEC njengomuntu omkhulu kanye ne-spintizer, efaka isandla kwimpilo yonke kanye nempilo eshalofini yale mikhiqizo.

4. Peepes kanye nokumbona:

Umkhakha we-Paint kanye ne-Coating Leverage ye-Mhec ngezakhiwo zawo zokuqina kanye nefilimu. Isiza ekuvimbeleni ukugcwala noma ukudonsa ngesikhathi sokufaka isicelo futhi inomthelela ekwakhekeni kwenhlanganisela efanayo nehlala isikhathi eside.

5. Adhesives:

UMhec udlala indima ekwakhekeni kwama-adhesives, anikela ngokubonakala kwawo nokunamathela. Izakhiwo zayo ezakha amafilimu zithuthukisa ukusebenza kwezibopho zokunamathela kuzo zonke izindawo ezahlukahlukene.

Ukucatshangelwa Kwezemvelo Nezokulawula:

Njenganoma iyiphi into yamakhemikhali, izici zezemvelo nezilawulayo ze-MHEC zikucatshangelwa ngokubalulekile. I-biodegradeabilibility ka-Mhec, kanye nomthelela wayo ongaba khona kwimvelo yemvelo kanye nempilo yabantu, kufanele ihlolwe kahle. Imizimba yokulawula, efana ne-Environmental Protection Agency (EPA) nezinhlaka ezifanele zamazwe aphesheya, inganikeza imihlahlandlela yokusebenzisa okuphephile kanye nokulahlwa kwemikhiqizo equkethe ama-MHEC.

I-methyl hydroxyyethyl celtuleose, ngokuhlanganiswa kwayo okuhlukile kwezakhiwo, sekuyinto ebaluleke kakhulu kwizicelo ezahlukahlukene zezimboni. Ukusuka ekuthuthukiseni ukusebenza kwezinto zokwakha ukuze ufake isandla ekutholeni kokuthungwa kanye nokuqina kwemithi kanye nezimonyo, i-Mhec iyaqhubeka nokudlala indima ebaluleke kakhulu. Njengoba izimboni zivela futhi zifuna izinto ezizinzile futhi ezisebenza kahle zikhula, ukuguquguquka okuhlukahlukene kwe-MHEC kukubeka njengomdlali osemqoka kunesidlali esisemqoka esibonelweni sesayensi yanamuhla yesayensi. Ucwaningo oluqhubekayo kanye nentuthuko cishe luzokwembula amathuba amasha kanye nezinhlelo zokusebenza, ukuqinisa okubaluleke kakhulu kwe-MHhec ekubumbeni ikusasa lezimboni eziningi.