He aha ka ʻokoʻa ma waena o HPMC a me HEMC?

ʻO HPMC (Hydroxypropyl Methylcellulose) a me HEMC (Hydroxyethyl Methylcellulose) he mau mea hoʻoheheʻe cellulose i hoʻohana ʻia e like me nā mānoanoa, nā mea hoʻopili, a me nā emulsifiers i nā ʻano huahana like ʻole. Loaʻa lāua ʻelua mai ka cellulose, kahi polysaccharide maoli i loaʻa i nā mea kanu.

ʻO ka ʻokoʻa nui ma waena o HPMC a me HEMC ke ʻano o nā hui hydroxypropyl a me hydroxyethyl i hoʻopili ʻia i ka mole cellulose. He mau pūʻulu hydroxypropyl ka HPMC i hoʻopili ʻia i ka mole cellulose, aʻo ka HEMC he mau pūʻulu hydroxyethyl i hoʻopili ʻia. ʻO kēia ʻokoʻa i ke ʻano o nā hui hydroxypropyl a me hydroxyethyl e pili ana i nā waiwai o nā derivatives cellulose ʻelua.

ʻOi aku ka hiki ke hoʻoheheʻe ʻia ka HPMC i ka wai anuanu ma mua o ka HEMC, a ʻoi aku ka pale ʻana i nā loli wela. He kiʻekiʻe ka viscosity ma mua o HEMC, a ʻoi aku ka paʻa i ka waikawa a me ka alkali. ʻOi aku ka pale ʻana i ka microbial degradation. Hoʻohana ʻia ka HPMC i nā huahana like ʻole, me ka meaʻai, nā lāʻau lapaʻau, a me nā mea hoʻonaninani.

ʻAʻole hiki ke hoʻoheheʻe ʻia ka HEMC i ka wai anuanu ma mua o ka HPMC, a ʻoi aku ka liʻiliʻi o ka pale ʻana i nā loli wela. He haʻahaʻa kona viscosity ma mua o ka HPMC, a ʻaʻole i kū i ka waika a me ka alkali. ʻAʻole kūʻē i ka microbial degradation. Hoʻohana ʻia ʻo HEMC i nā huahana like ʻole, me ka meaʻai, nā lāʻau lapaʻau, a me nā mea hoʻonaninani.

I ka hōʻuluʻulu ʻana, ʻo HPMC a me HEMC nā derivatives cellulose i hoʻohana ʻia e like me nā mānoanoa, nā mea hoʻopili, a me nā emulsifiers i nā huahana like ʻole. ʻO ka ʻokoʻa nui ma waena o nā mea ʻelua ʻo ia ke ʻano o nā hui hydroxypropyl a me hydroxyethyl i hoʻopili ʻia i ka mole cellulose. Loaʻa i ka HPMC nā pūʻulu hydroxypropyl i hoʻopili ʻia i ka molekele cellulose, ʻoiai ʻo HEMC he pūʻulu hydroxyethyl i hoʻopili ʻia. ʻO kēia ʻokoʻa i ke ʻano o nā hui hydroxypropyl a me hydroxyethyl e pili ana i nā waiwai o nā derivatives cellulose ʻelua.