Te Waikawa Waikawa Metilururo (HPMC)meMetila Hauwaitoitirīti Hēroro (MHEC)Ko ngā etera cellulose e rua e whakamahia whānuitia ana, i ahu mai i te cellulose tūturu, he pūmua e kitea ana i roto i ngā pakitara pūtau o ngā tipu. Ka whakarerekētia ēnei pūhui mā roto i ngā tukanga matū hei whakaputa rauemi e whakaatu ana i te matotoru, te pupuri wai, te hanganga kiriata, me ngā āhuatanga here. Ahakoa he rite tonu ngā āhuatanga mahi, he rerekē te hanganga matū, ngā āhuatanga, ngā tono, me te mahi i raro i ngā āhuatanga rerekē.

1. Te Hanganga me te Hanganga Matū

HPMC (Haidroksiporoporo Mītirau)

Ko te HPMC he etera cellulose kore-ionic i hangaia mā te tauhohenga o te cellulose ki te methyl chloride me te propylene oxide. Ko ngā rōpū hydroxyl (-OH) i runga i te tuara o te cellulose ka whakakapia wāhanga e ngā rōpū methoxy (-OCH₃) me te hydroxypropyl (-CH₂CHOHCH₃).

MHEC (Metila Hauwaioraitiri Hēroro)

Ko te MHEC ia, ka hangaia mā te tauhohenga o te cellulose ki te ethylene oxide me te methyl chloride. Mā tēnei ka whakaurua mai ngā rōpū methoxy (-OCH₃) me te hydroxyethyl (-CH₂CH₂OH).

Ngā Rerekētanga Matua o te Hanganga:

Kei roto i te HPMC ngā whakakapinga hydroxypropyl, ko te MHEC ia kei roto ngā rōpū hydroxyethyl.

Ka pā te momo rōpū etera ki te waikura, te wairewatanga, me te whanonga whakarewatanga wera.

Te Āhua Matatini: Kei te wātea te HPMC me te MHEC i roto i ngā momo matatini rerekē, he mea whakarite mō ngā tono rerekē. Heoi, ka pā te hanganga ngota ki te whanonga matatini i roto i te otinga. Ko te tikanga, he pai ake te whakawera wera me te matatini pumau o te HPMC i roto i te whānuitanga pH.

3. Ngā Āhuatanga Mahi

Te Pupuri Wai:

He tino pai ngā rauemi e rua hei pupuri wai, he mea nui tēnei i roto i ngā pūnaha sima me te gypsum. Heoi, he pai ake te pupuri wai a te HPMC, ā, he pai ake tēnei i roto i ngā moata ranunga maroke, ngā piripiri taera, me ngā mea whakarewa.

Pānga Whakamātotoru:

He maeneene ake, he pumau ake hoki te matotoru o te MHEC i roto i ngā wairewa wai, ā, he mea e hiahiatia ana mō ngā tono e hiahiatia ana te rere ōrite me te ngāwari ki te mahi.

Te Hanga Kiriata:

He āhua ngāwari ake, he mārama ake hoki te hanga a te HPMC, engari he ngawari ake ngā kiriata a te MHEC. Ka pāngia ēnei rerekētanga e ngā tono ki ngā paninga mata me ngā piripiri.

Te Whakapūtanga Wera:

Ka pāngia te HPMC e te wai wera, ka hanga he wai tio ina whakamahanatia. Ka whakaatuhia hoki e te MHEC te wai wera, engari he iti iho te nui. He mea nui tēnei āhuatanga i roto i ngā tono rongoā me te kai ina hiahiatia he ārai wai tio, he kakano rānei.

4. Ngā tono

E whakamahia ana te HPMC me te MHEC i roto i te whānuitanga o ngā ahumahi. Heoi, nā ētahi āhuatanga mahi e pai ake ai tētahi i tētahi mō ngā tono motuhake.

4.1 Ahumahi Hanga

HPMC:

Ngā piripiri tāera

Ngā pāreti me ngā mea hanga i runga i te sima

Ngā matū whakaōrite-ake

Ngā pūnaha whakaoti whakamahana o waho (EIFS)

Ngā pāreti e hangai ana ki te gypsum

Ngā Painga i roto i te Hanganga:

Te pupuri wai nui

He pai ake te wā tuwhera i roto i ngā piripiri

Te whakapai ake i te ngāwari o te mahi

MHEC:

Ngā koti kiri-kore

Pāreti māmā

Ngā piripiri pepapātū

Ngā matū honohono kua oti te whakaranu

Ngā Painga i roto i te Hanganga:

Te āhua maeneene

Ngā āhuatanga piri pai

Ngāwari te whakaranu

4.2 Rongoā

HPMC:

Whakamahia hei here me te āpitihanga kiriata i roto i ngā papa

Ngā pūnaha matihiko tukunga rongoā whakahaeretia

Ngā pata kanohi me ngā hinu kanohi

MHEC:

Kāore i te tino whakamahia nā te iti o ōna āhuatanga whakarewa, engari e tika ana tonu mō:

Ngā whakatārewatanga ā-waha

Ngā whakatakotoranga ā-papa

4.3 Ngā Peita me ngā Paninga

MHEC:

He pai ake te whakamahi i ngā peita wai nā te mea he pai ake te āhua o te kirihou rūpahu (te whakangawari i te kutikuti)

Ka whakarei ake i te ngāwari o te paraihe me te maeneene o te paninga

HPMC:

Ka whakamahia hoki ki ngā peita, inā koa ka hiahiatia he āhuatanga pupuri wai, he āhuatanga whakarewa rānei

D. Ngā Hopi me te Tiaki Whaiaro

HPMC:

Ngā hopi horoi, ngā whakangawari, me ngā hinu kiri

He mea whakamātotoru, he mea whakaū hoki

MHEC:

Ngā hopi ringaringa me ngā horoi tinana

He pai ake mō te mārama ake me te ngāwari o te whakatakotoranga

4.4 Ahumahi Kai

HPMC:

Kua whakaaetia hei tāpiringa kai (E464)

Whakamahia i roto i ngā kāpūru kaiwhenua, ngā hua tunu taro, me ngā ranu whakaemulsified

Āwhina i te kakano me te pumau

MHEC:

Kāore i te tino whakaaetia mō te kai; he iti noa te whakamahinga

5. Ngā Āhuatanga Taiao me ngā Āhuatanga Ture

Kāore he paitini o te HPMC me te MHEC, he pirau-koiora, he kore-ionic hoki, ā, he haumaru mō te whakamahi i roto i te maha o ngā hua. Heoi anō:

He whānuitia ake te whakaaetia o te HPMC mō te whakamahinga rongoā me te kai.

E whakamahia nuitia ana te MHEC mō ngā mahi ahumahi me ngā mahi whakapaipai.

6. Te Utu me te Wātea

He iti ake te utu o te MHEC i te HPMC nā te mea he māmā ake te tukanga whakaputa me te iti ake o te tono i roto i ngā mākete rongoā me ngā mākete kai. Heoi, ko te whānuitanga o te tono a te HPMC, inā koa i roto i ngā ahumahi kua whakahaeretia, e tika ai te utu nui ake.

I roto i ngā pūnaha mahi-teitei pērā i ngā piripiri taera, i ngā mea rānei e hiahiatia ana he nui te pupuri wai me te piri, ka pai ake te HPMC. He rerekē, mō te tono maeneene me te ngāwari o te whakaranu, pērā i roto i ngā hononga matū, i ngā whakapiri pakitara rānei, ka nui ake te whai hua o te MHEC.

I aHPMCmeMHECHe rite tonu te matū o ngā cellulose ethers, ko ō rātou rōpū whakakapinga motuhake (hydroxypropyl i roto i te HPMC vs. hydroxyethyl i roto i te MHEC) ka hua ake he rerekētanga nui i roto i te mahi, inā koa i roto i te whakawairakau wera, te pupuri wai, te hanganga kiriata, me te hototahi tono.