Name: synthesis of hydrogels with antifouling properties as membranes for water purification
Uploaded: 2017-04-07T14:00:00
Description: Watch this Scientific Journal Video about Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification at JoVE.com

We gratefully acknowledge the financial support of this work by the Korean Carbon Capture and Sequestration R&amp;D Center (KCRC).

프레 폴리머 솔루션 1. 준비 <ol><li> 조제 물을 용매로 사용하여 <ol><li> 자기 교반 막대로 유리 병에 탈 이온수 (DI) 물 10.00 g을 추가한다. </li><li> SBMA 2.00 g을 측정하고, 물을 함유하는 유리 병으로 옮긴다. SBMA가 완전히 용해 될 때까지 30 분 동안 용액을 교반 하였다. </li><li> 별도의 병에, PEGDA의 20.00 g (M, N = 700g / 몰)을 추가한다. </li><li> PEGDA 용액에, 1- 히드 록시 시클로 헥실 페닐...

<ol>
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우리는 자립 영화와 양쪽 성 하이드로 젤을 기반으로 함침 세포막을 준비하는 손쉬운 방법을 증명하고있다. 세 (메트) 아크릴 레이트 특성 피크의 소멸 (즉, 810, 1,190 및 1,410cm-1) 얻어진 폴리머 필름의 IR 스펙트럼과는 막 (도 2) 단량체 및 가교제 (4)의 우수한 전환을 나타낸다 함침 19 (21). 또한, SO (...

증가하는 수요를 충족하기 위해 깨끗한 물을 생산하기 위해 저렴한 비용 및 에너지 효율적인 기술을 개발하는 중대한 필요가있다. 고분자 멤브레인은 작업 1의 높은 에너지 효율, 낮은 비용, 단순성으로 인해 자신의 고유 한 장점 정수에 대한 선도적 인 기술로 등장했다. 막 순수한 물을 통해 침투와 오염 물질을 거부 할 수 있습니다. 그러나, 멤브레인은 종종 유리한 작용 (2, 3)에서 막 표면에 흡착 될 수있는 공급 물 오염 물질에 의해 오염을 실시한다. 오손 극적 필요한 멤브레인 면적 정수 비용을 증가 막을 통해 물 흐름을 감소시킬 수있다. 오염을 줄일 수있는 효과적인 방법은 친수성을 증가시키고 이에에서 유리한 감소 막 표면을 수정하는 것막 표면 사이 foulants 고유 상호 작용. 하나의 방법은 3 초 친수성 하이드로 겔로 박막 코팅을 사용하는 것이다. 하이드로 겔은 종종 높은 물 투과성을 가지고, 따라서, 박막 코팅은 막 전체에 걸쳐 약간 증가 반송 저항 불구 인해 완화 된 오염을 막을 통한 장기간의 물 투과도를 증가시킬 수있다. 하이드로 겔은 또한 직접 침투 응용 4 정수용 막 함침으로 제조 될 수있다. 양쪽이 온성 물질은 순 중성 전하와 양 양 및 음으로 하전 된 작용기를 포함하고, 정전 유도 수소 결합 5, 6, 7, 8, 9를 통해 강한 표면 수분을 갖는다. 단단히 결합 된 수화 층은 물리적 역할에너지 장벽은, 표면에 부착로부터 foulants 방지 따라서 우수한 방오성 10 시연. 폴리 (술 포베 타인 메타 크릴 레이트) (PSBMA) 및 폴리 (carboxybetaine 메타 크릴 레이트) (PCBMA)와 같은 양쪽이 온성 중합체, 11, 12, 13, 14, 15, 16, 17, 18가 증가 도포하여 막 표면을 수정하는데 사용되어왔다 표면 친수성 때문에 방오성. 우리는 여기에 폴리 (에틸렌 글리콜)을 사용하여 가교 광중합 통해 술 포베 타인 메타 크릴 레이트 (SBMA)를 사용하여 양쪽이 온성 하이드로 디 아크릴 레이트를 제조하기위한 용이 한 방법을 설명 (PEGDA가 M N = 700g / 몰)은 기계적 강도를 향상시킬 수있다. 우리는 또한 존재하는절차는 광중합 전에 다공성 지지체에 소수성 단량체와 가교제를 함침 견고한 막을 구성한다. 프리 스탠딩 필름을 함침 막의 물리적 해상 수송 성질은 충분히 정수용 구성 / 속성의 관계를 규명하는 것을 특징으로한다. 제조 된 하이드로 겔은 막 분리 특성을 향상시키기 위해 표면 코팅으로서 사용될 수있다. 가교 밀도를 조절하여 소수성 다공성 지지체에 함침시킴으로써, 이들 물질은 또한 순방향 또는 삼투 압력 지연 삼투 4 삼투압 공정에 대한 충분한 기계적 강도를 갖는 박막을 형성 할 수있다.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Poly(ethylene glycol) diacrylate&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Mn = 700 (PEGDA)</td>
			<td>Sigma Aldrich</td>
			<td>455008</td>
			<td></td>
		</tr>
		<tr>
			<td>1-Hydroxycyclohexyl phenyl ketone, 99% (HCPK)</td>
			<td>Sigma Aldrich</td>
			<td>405612</td>
			<td></td>
		</tr>
		<tr>
			<td>[2-(Methacrloyloxy)ethyl dimethyl-(3-sulfopropyl) ammonium hydroxide, 97%</td>
			<td>Sigma Aldrich</td>
			<td>537284</td>
			<td>Acutely Toxic</td>
		</tr>
		<tr>
			<td>Ethanol, 95%</td>
			<td>Koptec, VWR International</td>
			<td>V1101</td>
			<td>Flamable</td>
		</tr>
		<tr>
			<td>Decane, anhydrous, 99%</td>
			<td>Sigma Aldrich</td>
			<td>457116</td>
			<td></td>
		</tr>
		<tr>
			<td>Solupor Membrane</td>
			<td>Lydall</td>
			<td>7PO7D</td>
			<td></td>
		</tr>
		<tr>
			<td>Micrometer&#160;</td>
			<td>Starrett</td>
			<td>2900-6</td>
			<td></td>
		</tr>
		<tr>
			<td>ATR-FTIR</td>
			<td>Vertex 70</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>DSC: TA Q2000</td>
			<td>TA Instruments</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Rame&#8217;-hart Goniometer: Model 190</td>
			<td>Rame&#8217;-hart Instruments</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Ultraviolet Crosslinker: CX-2000</td>
			<td>Ultra-Violet Products</td>
			<td></td>
			<td>UV radiation&#160;</td>
		</tr>
		<tr>
			<td>Permeation Cell: Model UHP-43</td>
			<td>Advantec MFS</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Deionized Water: Milli-Q Water</td>
			<td>EMD Millipore</td>
			<td></td>
			<td></td>
		</tr>
	</tbody>
</table>

synthesis of hydrogels with antifouling properties as membranes for water purification

하이드로 겔은 시간 경과에 널리 막을 통해 안정된 투수 달성 따라서 방오성을 증가시키고, 정수용 막 표면의 친수성을 향상시키기 위해 사용되어왔다. 여기, 우리는 막 애플리케이션에 양쪽 성 이온에 따라 하이드로 젤을 준비하는 손쉬운 방법을보고합니다. 프리 스탠딩 필름은 광중합 통해 폴리 가교제 (에틸렌 글리콜) 디 아크릴 레이트 (PEGDA)와 메타 크릴 술 포베 타인 (SBMA)로부터 제조 될 수있다. 하이드로 겔은, 기계적 강도를 향상시키는 소수성 다공성 지지체에 함침시켜 제조 할 수있다. 이들 필름은 중합체 쇄 역학 친수성 및 시차 주사 열량계 (DSC)에 대한 고니 오 미터를 이용하여, (메트) 아크릴 기의 전화율을 결정하기 위해 적외선 분광법 (ATR-FTIR)을 변형 감쇄 전반사 푸리에 특징으로 할 수있다. 우리는 또한 막 다른 FILTRA에서 투수를 결정하기 위해 프로토콜을보고기 시스템 및 막 성능에 foulants 효과 (소 혈청 알부민, BSA).

단계 1.1 및 1.2에 규정 된 프리폴리머 용액으로 제조 된 프리 스탠딩 필름을 각각 S50 및 S30로 지칭된다. 자세한 내용은 표 1에 나타낸다. 단계 1.2에 명시된 프레 폴리머 용액은 IMS30로 표시되는 함침 멤브레인을 제조하는데 사용 하였다. 다공성 지지체는 친수성 폴리에틸렌 때문에도 1-4에 나?...

Watch this Scientific Journal Video about Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification at JoVE.com

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

This paper reports practical methods to prepare hydrogels in freestanding films and impregnated membranes and to characterize their physical properties, including water transport properties.

물 정화를위한 막으로 방오 특성을 가진 히드로 겔의 합성

Hydrogels have been widely utilized to enhance the surface hydrophilicity of membranes for water purification, increasing the antifouling properties and ...

The overall goal of this procedure is to prepare and characterize freestanding films and impregnated membranes based on zwitterionic hydrogels for membrane water purification. This method provide guidance for repairing hydrogel base freestanding film in impregnated membrane and as well as for characterizing their physical and transport properties. The main advantage of this technique is that it's simple, fast, and easy to be scaled up in industrial production.Visual demonstration of this method is critical as the integrated hydrogel preparation and characterization steps are difficult to learn because custom built apparatus is used, and interdisciplinary skills are required. To prepare the freestanding films, first place two spacers of known thickness on a clean quartz disc. The thickness of the spacers controls the thickness of the obtained polymer films.Transfer a small amount of the pre-polymer solution to the quartz disc using a disposable pipette. Place another quartz disc on top of the liquid and ensure that there are no bubbles in the liquid film. Then, place the sample in an ultraviolet or UV crosslinker and irradiate it for five minutes using UV light with a wavelength of 254 nanometers.When the polymer film is removed from the quartz disc, it is critical to work slowly to avoid tearing the film. Separate the polymer film from the quartz discs using a sharp blade. Use tweezers to transfer the film to a deionized water bath.Change the water twice during the first 24 hours to remove the solvent, unreacted monymer and crosslinker, and solve from the film. To prepare dried films for analysis, remove the film from the water bath and allow it to air dry for 24 hours. Place the film in a vacuum oven at 80 degrees Celsius to dry overnight under vacuum.Place a sheet of porous support onto a quartz disc. Using a foam brush, coat each side of the support twice with a prepolymer solution that is based on the water ethanol mixture. Place another quartz disc on top of the support.Then place the sample in a UV crosslinker and irradiate it for five minutes using UV light with a wavelength of 254 nanometers. To remove the impregnated membrane from the quartz discs, immerse the whole assembly in a deionized water bath for five minutes and carefully remove the membrane using a sharp blade and tweezers. Keeping the membrane in deionized water, change the water twice to remove the solvent, the unreacted monymer and crosslinker, and the sol from the membrane.To prepare dried, impregnated membranes for analysis, remove the membrane from the water bath, allow the membrane to dry at ambient conditions for 24 hours. Then, dry the membrane in a vacuum oven overnight at 80 degrees Celsius under vacuum. To measure the contact angles using the pendant drop method, first cut a rectangular strip of the membrane sample.Soak this strip in deionized water for 10 minutes. And then dry it for five minutes. Place the dried sample on the sample holder.Then, submerge the sample holder in a transparent environmental chamber containing the deionized water. In the next step, it is critical to work slowly and dispensing the n-decane drops onto the membranes. Using a microliter syringe with a stainless steel needle, dispense drops of n-decane onto the membrane sample.Leave the setup undisturbed for two minutes to ensure the stabilization of the droplets. Next, use appropriate image analysis software to determine the contact angle of the samples by measuring the angles of the dispensed droplets on the membrane surface. To characterize the water permeability using a dead end filtration system, first cut coupons of freestanding films and impregnated membranes with a hammer driven hole punch of an appropriate diameter.Place a prepared coupon on the porous support inside a dead end filtration cell. Then, place the O ring on top of the sample. Screw the two halves of the permeation cell together.Next, add approximately 50 milliliters of deonized water to the permeation cell. Screw on the cap and place the permeation cell on a magnetic stirrer. Set the stirring rate to between 300 and 900 RPM.Then, place a covered beaker on a balance to collect the permeate water and tear the balance. Open the valve on the gas cylinder. Turn the pressure regulator valve clockwise until the desired pressure is reached.Finally, open the release valve to deliver the pressure to the permeation cell. Monitor and record the weight of the beaker with time. Shown here are photos of the freestanding film, porous support, and impregnated membranes.It is evidence that after the porous support is filled with the hydrogel, it changes from opaque to transparent. The infrared spectra indicate the almost complete conversion of the acryllate groups in the hydrogels. Due to the absence of acryllate characteristic peaks in the spectra.The glass transition temperature of hydrogels is determined by differential scan calorimetry as shown here. Lower contact angles in the freestanding films and impregnated membranes indicate the greater hydrophilicity than the porous support. After watching this video you should have a good understanding of how to repair hydrogel base materials and characterize their properties.This work describes a faster method to fabricate hydrogel based material via photopolymerizations as well as how to characterize them for water purification. The method and material may also be used to repair membrane for gas operations such as CO2 capture. Don't forget that working with chemical and UV radiation can be extremely hazardous and precautions such as personal protective equipment should always be taken while performing this procedure.

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