1. He tirohanga whānui mō te methyl hydroxyethyl cellulose (MHEC)
Ko te Methyl hydroxyethyl cellulose (MHEC) he ether cellulose kore-ionic i whiwhihia mā te whakarerekētanga methylation i runga i te hydroxyethyl cellulose. Nā tōna hanganga ngota ahurei, he pai te wairewa, te matotoru, te piri, te hanga kiriata me te mahi mata o te MHEC, ā, kua whānuitia te whakamahinga i roto i ngā paninga, ngā rauemi hanga, ngā matū o ia rā me ētahi atu mara.
2. He tirohanga whānui mō ngā mīhini tango peita
He matū ngā mīhini tango peita e whakamahia ana hei tango i ngā paninga mata pērā i te konganuku, te rakau, me te kirihou. Ko ngā mīhini tango peita tuku iho e whakamahi ana i ngā pūnaha whakarewa pakari, pērā i te dichloromethane me te toluene. Ahakoa he whai hua ēnei matū, he raruraru anō hoki kei a rātou pērā i te tere o te hurihanga, te paitini me ngā tūponotanga ki te taiao. Nā te kaha haere o ngā ture taiao me te whakapainga o ngā whakaritenga taiao mahi, kua piki haere te rongonui o ngā mīhini tango peita wai me te iti te paitini i roto i te mākete.
3. Te tikanga mahi a te MHEC i roto i ngā mīhini tango peita
I roto i ngā mīhini tango peita, he mahi nui tā te MHEC hei whakamātotoru me te whakarerekē i te reo:
Pānga whakamātotoru:
He pai te pānga whakamātotoru o te MHEC i roto i ngā pūnaha wai. Mā te whakarerekē i te matotoru o te mīhini tango peita, ka taea e te MHEC te piri o te mīhini tango peita ki ngā mata poutū, ki ngā mata piko rānei, me te kore e piko. He mea nui tēnei āhuatanga i te wā e whakamahia ana ngā mīhini tango peita nā te mea ka taea e te mīhini tango peita te noho roa ki runga i te mata e hiahiatia ana, ā, ka pai ake te pānga tango peita.
Whakapūmautia te pūnaha whakatārewatanga:
He maha ngā matū hohe kei roto i ngā mīhini tango peita, ka taea te whakarōpū, te whakatau rānei i te wā e rongoatia ana. Mā te whakarei ake i te matotoru hanganga o te wairewa, ka taea e te MHEC te ārai i te whakatōnga o ngā matūriki totoka, te pupuri i te tohatoha ōrite o ngā matūriki, me te whakarite kia pumau te mahi a te mīhini tango peita.
Whakatikatikahia ngā āhuatanga rheological:
Ko te whakamahinga o ngā mīhini tango peita me whai āhuatanga rheological pai, arā, ka taea te rere pai ina pāngia te kaha o waho, engari ka tere te matotoru ina noho pūmau. Mā te hanganga mekameka ngota o te MHEC ka pai ngā āhuatanga angiangi kutikuti, arā, i ngā tere kutikuti teitei, ka heke te matotoru o te otinga, ka māmā ake te paninga o te mīhini tango peita; i ngā tere kutikuti iti, i te āhua pūmau rānei, he teitei te matotoru o te otinga, ka āwhina i te rauemi ki te hanga i tētahi paninga ōrite ki te mata ūnga.
Te whakatairanga i te hanganga kiriata:
I te wā e tangohia ana te peita, ka taea e te MHEC te āwhina i te mīhini tango peita kia hanga he kiriata ōrite ki te mata e hiahiatia ana. E kore e taea e tēnei kiriata te whakaroa noa i te wā mahi a ngā matū hohe, engari ka whakarei ake hoki i te kaha hipoki o te mīhini tango peita ki tētahi taumata, kia taea ai e ia te uru pai ki roto i ngā wāhanga katoa o te paninga.
4. Me pēhea te whakamahi i te MHEC i roto i ngā mīhini tango peita
Te whakarite i te otinga wai:
Ko te tikanga, kei roto te MHEC i te paura, ā, me whakarite kia waiho hei wairewa i mua i te whakamahinga. Ko te tikanga whānui ko te tāpiri mārire i te MHEC ki te wai kua whakaohokia kia kore ai e pupū. Me mōhio ko te pāmahana wai me te pH ka pā ki te wairewatanga o te MHEC. Ka taea e te pāmahana wai teitei ake (50-60℃) te whakatere i te tukanga whakarewatanga o te MHEC, engari ka pāngia te mahi matotoru o te pāmahana teitei rawa.
I konatunatua ki ngā mīhini tango peita:
I te wā e whakarite ana i ngā mīhini tango peita, ka tāpirihia mārire te otinga wai MHEC ki te wai turanga mīhini tango peita me te whakaoho. Hei whakarite kia rite te horapa, kaua e tere rawa te tāpiri i te MHEC, ā, me whakaoho tonu kia whiwhi rā anō i te otinga ōrite. Me whakahaere te tere whakaoho i tēnei tukanga kia kore ai e puta he mirumiru.
Te whakatikatika o te tātai:
Ko te nui o te MHEC i roto i ngā mīhini tango peita ka whakarerekētia i runga i te tauira me te mahi whainga o ngā mīhini tango peita. Ko te nui tāpiri noa kei waenga i te 0.1%-1%. Ki te kaha rawa te pānga matotoru, ka kore e ōrite te paninga, ka nui rawa rānei te matotoru, engari kāore e ranea te horopeta e tutuki ai te matotoru me ngā āhuatanga rheological e tika ana, nō reira me arotau te whakamahinga mā te whakamātautau.
5. Ngā Painga o te MHEC i roto i ngā mīhini tango peita
Te haumaru me te tiaki taiao:
Ki te whakatauritea ki ngā whakamātotoru tuku iho, he cellulose ether kore-ionic te MHEC, kāore he matū paitini, he matū kino hoki, he haumaru ake mō te tinana tangata me te taiao, ā, e hangai ana ki te ahunga whanaketanga o te matū matomato hou.
Pūmautanga tino pai: He pai te pumau matū o te MHEC i roto i te awhe pH whānui (pH 2-12), ka taea te pupuri i te pānga matotoru pumau i roto i ngā pūnaha tango peita maha, ā, kāore e ngāwari te whakararuraru e ētahi atu wāhanga o te pūnaha.
He hototahitanga pai: Nā te āhua kore-ionic o te MHEC, he hototahitanga pai ki te nuinga o ngā kai hohe, e kore e taunekeneke, e kore hoki e whakararu i te pūnaha, ā, he pai mō ngā momo whakatakotoranga tango peita.
Pānga whakamātotoru whai hua: Ka taea e te MHEC te whakarato i tētahi pānga whakamātotoru nui, ā, ka whakaitihia te nui o ētahi atu whakamātotoru i roto i te mīhini tango peita, ka māmā ake te tauira me te whakaiti i ngā utu.
Kua whānuitia te whakamahinga o te Methyl hydroxyethyl cellulose (MHEC) i roto i ngā mīhini tango peita hou nā tōna matotorutanga, tōna pumautanga, me tōna hototahitanga. Mā te hoahoa me te whakamahinga tauira whaitake, ka taea e te MHEC te whakapai ake i te mahi a ngā mīhini tango peita, kia nui ake ai te whai huatanga me te tiaki taiao i roto i ngā mahi whaihua. I te heke mai, me te whanaketanga tonu o te hangarau mīhini tango peita me te whakapai ake i ngā whakaritenga tiaki taiao, ka whānui ake ngā tūmanakohanga tono o te MHEC i roto i ngā mīhini tango peita.
Wā tuku: Pipiri-14-2024